MALICIOUS — d67e40b1d2fa3790c485e4fce87eb82752cf93d1bb4ce11cd832bdbae246c0d6

MALICIOUS — d67e40b1d2fa3790c485e4fce87eb82752cf93d1bb4ce11cd832bdbae246c0d6 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (97/100), attributed to the Bulz family. 10 of 52 detection engines flagged it, exhibiting 1 ATT&CK technique.

Identification

• SHA-256: d67e40b1d2fa3790c485e4fce87eb82752cf93d1bb4ce11cd832bdbae246c0d6
• SHA-1: c108f351ed9778368031df8230da3af9c1a27524
• MD5: e06b14efb8ad4d74853d4e8e9682bbda
• imphash: 01392ca861cf87b8d28ad9ea90016bb4
• ssdeep: 24576:RztFuFuzeVS0xzfadB3I9/HEp6uuURVx4x2aSqc5EVkTrwAJJ4UE:8oUydB3IJEp6ORe2fP5GAFE
• TLSH: T1D65C9D885111E705D6B2DB616F809D1C642FF4D92EBA1B8C6383C56EF2E6C7360381AD
• Submitted as: d67e40b1d2fa3790c485e4fce87eb82752cf93d1bb4ce11cd832bdbae246c0d6
• File type: pe · Size: 2405888 bytes
• Verdict: malicious (97/100) · Family: Bulz

Detections (10 of 52 engines)

• capa (capabilities): capability:collection/keylog
• MalwareAnalyser heuristics (entropy/packer): ASPack
• ClamAV (daily): Win.Malware.Bulz-9885565-0
• YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
• YARA: Yara-Rules community: YR_Packer_ASPack_MPRESS
• Detect It Easy (packer/type): DIE:Microsoft Linker
• Microsoft Defender: Worm:Win32/AutoRun!pz
• Emsisoft (Emergency Kit): Gen:Heur.Mint.Autorunner.1
• Trellix Stinger (McAfee): W32/Worm-GBW!E06B14EFB8AD
• Kaspersky (KVRT): Worm.Win32.AutoRun.vx

MITRE ATT&CK

• T1056.001

Why this verdict

The malicious score of 97/100 is the fusion of 7 weighted signals:

• ClamAV (daily) flagged Win.Malware.Bulz-9885565-0 (rule Win.Malware.Bulz-9885565-0) - engine signal, weight 0.90, confidence 0.95
• capture keystrokes (rule capture keystrokes) - capa signal, weight 0.40, confidence 0.80
• YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.35, confidence 0.70
• YARA: Yara-Rules community flagged YR_Packer_ASPack_MPRESS (rule YR_Packer_ASPack_MPRESS) - engine signal, weight 0.35, confidence 0.70
• Detect It Easy (packer/type) flagged DIE:Microsoft Linker (rule DIE:Microsoft Linker) - engine signal, weight 0.35, confidence 0.70
• Embedded network infrastructure: 6.0.1.0, 5.1.131.0 - static signal, weight 0.35, confidence 0.60
• Packing/obfuscation: ASPack, high-entropy-sections:.text, Microsoft Linker - static signal, weight 0.25, confidence 0.55

Dynamic analysis

No runtime behaviour was captured for this sample, so the analysis above is static only. That is a limit of this run rather than evidence the sample does nothing.

Embedded URLs

• http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0
• http://www.microsoft.com/pki/certs/MicCodSigPCA_08-31-2010.crt0
• http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0T
• http://office.microsoft.com
• http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt0
• http://www.microsoft.com/pki/certs/MicTimStaPCA_2010-07-01.crt0
• http://crl.verisign.com/tss-ca.crl0
• http://crl.microsoft.com/pki/crl/products/CodeSignPCA2.crl0O

Embedded domains

• crl.microsoft.com
• www.microsoft.com
• office.microsoft.com
• crl.verisign.com

Embedded IP addresses

• 6.0.1.0
• 5.1.131.0

File paths

• F:\Office\Target\x86\ship\postc2r\x-none\wordconv.pdb
• C:\WINDOWS\system32\msvbvm60.dll\3
• d:\Office\Source\groove\bin\ReleaseSym\DRAT.pdb
• C:\btvsts\3783\private\softgrid\shared\include\shared\file_utils.hpp
• T:\:d:l:t:
• X:\:`:d:h:l:p:t:x:
• X:\:`:h:
• L:\:h:p:
• F:\Office\Target\x86\ship\postc2r\x-none\msouc.pdb
• X:\:d:
• H:\:`:p:t:x:
• X:\:l:p:

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report