Office (OLE) / .XLS malware analysis — malicious · e98fec3c8adc5cfa

MALICIOUS

Office (OLE) / .XLS

76.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 52d9e3f86c487bd73d678429e94cfe63 SHA-1: 8940f0906bd73be2849bdb221a83537659948067 SHA-256: e98fec3c8adc5cfa6d99679943c5124c8594f0f262fee739c58b2eeee19d6ff5

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1059.005 Visual Basic

The Workbook_Open macro executes a PowerShell command constructed from concatenated strings. This command downloads a second-stage executable from 'http://jklairesolutions.com/za-admin/mannger/today.exe' to 'C:\Users\Public\Documents\presidentlow.exe' and then executes it. The macro also attempts to create a file at 'C:\Users\Public\dssdd.cmzd' which is then opened by explorer, likely to trigger the execution of the downloaded payload.

Heuristics 5

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `604d51af097ff9b836a7740782b34bd8f04f1227285eb8a5402baf308d63b3bd`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1854 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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