Office (OLE) / .XLS malware analysis — malicious · c4b54ddd6e1c947a

MALICIOUS

Office (OLE) / .XLS

51.5 KB

MD5: 1839817b8f1c863ec993f0822fe17896 SHA-1: 98f69e13a592ea857b38ccbb48bbb6a10f280d94 SHA-256: c4b54ddd6e1c947acdb1d7e7fb0c339d463b56dfa780e2e66df68e47200c4f6a

720 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1218.011 Signed Binary Proxy Execution: Rundll32 T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File: User Execution

The sample is a malicious XLS file containing VBA macros. The macros utilize WScript.Shell and cmd.exe to execute a suspicious HTA file hosted at https://evangelia.edu/image/bin/Rjboi0.hta. This indicates a likely downloader or initial access mechanism. The use of obfuscated shell commands and WMI for process creation further supports a malicious intent.

Heuristics 17

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
WScript.Shell usage critical OLE_VBA_WSCRIPT

WScript.Shell usage
LOLBin reference in VBA critical OLE_VBA_LOLBIN

LOLBin reference in VBA
Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL

VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE

VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
Suspicious cmd.exe invocation with execution flag high SC_STR_CMD

Suspicious cmd.exe invocation with execution flag
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Reference to mshta.exe high SC_STR_MSHTA

Reference to mshta.exe
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject call
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND

Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
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 https://evangelia.edu/image/bin/Rjboi0.hta

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `e341680410fc338e5f42102fec7f90d15b1071d396eb9284bd6b684edb3d3041`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10385 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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