MALICIOUS — b09db37b611318fb75f765febee911ef18e0731f7bc87dfe84197a6ef13676e8

MALICIOUS — b09db37b611318fb75f765febee911ef18e0731f7bc87dfe84197a6ef13676e8 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the Bulz family. 7 of 56 detection engines flagged it, exhibiting 4 ATT&CK techniques.

Identification

• SHA-256: b09db37b611318fb75f765febee911ef18e0731f7bc87dfe84197a6ef13676e8
• SHA-1: 3ff140c447ce301aa08174abb644f392cca36b5d
• MD5: 4e15526884dcb0be2bfd29a18cb7f1d5
• imphash: 7732c84aec7391973c26fbc2c07a6022
• ssdeep: 49152:NOKkVkLOyMM84p0DkYOMwwnMb4PmyV8Ep6:9f5YOXwnS4rVPp
• TLSH: T1A05A9E881126E306D6F2DB645F504A9C642EF4E931BD2B8C1283C67EF2E3C77A4750A5
• Submitted as: b09db37b611318fb75f765febee911ef18e0731f7bc87dfe84197a6ef13676e8
• File type: pe · Size: 2110765 bytes
• Verdict: malicious (100/100) · Family: Bulz

Detections (7 of 56 engines)

• YARA: MalwareAnalyser built-in: Windows_Injection_Api_Combo
• capa (capabilities): capability:collection/keylog
• ClamAV (daily): Win.Malware.Bulz-9885565-0
• YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
• YARA: MalwareAnalyser community pack: TL_Shellcode_VirtualAlloc_Exec
• YARA: Yara-Rules community: YR_AntiDebug_Checks
• LIEF (executable format parser): lief:invalid-authenticode

MITRE ATT&CK

• T1055
• T1071.001
• T1057
• T1056.001

YARA

• Windows_Injection_Api_Combo

Why this verdict

The malicious score of 100/100 is the fusion of 15 weighted signals:

• ClamAV (daily) flagged Win.Malware.Bulz-9885565-0 (rule Win.Malware.Bulz-9885565-0) - engine signal, weight 0.90, confidence 0.95
• Process injection API combination (rule Windows_Injection_Api_Combo) - yara signal, weight 0.65, confidence 0.90
• YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.60, confidence 0.70
• capture keystrokes (rule capture keystrokes) - capa signal, weight 0.40, confidence 0.80
• Contacted 3 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
• YARA: Yara-Rules community flagged YR_AntiDebug_Checks (rule YR_AntiDebug_Checks) - engine signal, weight 0.35, confidence 0.70
• LIEF (executable format parser) flagged lief:invalid-authenticode (rule lief:invalid-authenticode) - engine signal, weight 0.35, confidence 0.70
• YARA: MalwareAnalyser built-in flagged Windows_Injection_Api_Combo (rule Windows_Injection_Api_Combo) - engine signal, weight 0.35, confidence 0.70
• capa (capabilities) flagged capability:collection/keylog (rule capability:collection/keylog) - engine signal, weight 0.35, confidence 0.70
• YARA: MalwareAnalyser community pack flagged TL_Shellcode_VirtualAlloc_Exec (rule TL_Shellcode_VirtualAlloc_Exec) - engine signal, weight 0.30, confidence 0.70
• Embedded network infrastructure: http://purl.org/atom/ns#, http://purl.org/atom/ns#modified, http://purl.org/atom/ns#id - static signal, weight 0.35, confidence 0.60
• communicate over HTTP (rule communicate over HTTP) - capa signal, weight 0.30, confidence 0.60
• enumerate processes (rule enumerate processes) - capa signal, weight 0.20, confidence 0.60
• inject code into another process (rule inject code into another process) - capa signal, weight 0.12, confidence 0.60
• Memory forensics: 4 finding(s) elsewhere in the guest, not attributed to this sample, e.g. RWX/private injected region in SppExtComObj.E (pid 5764) (rule windows.malfind.Malfind) - memory signal, weight 0.05, confidence 0.30

Dynamic analysis (windows)

0 behavior events · 0 ATT&CK techniques · 0 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• update.googleapis.com
• login.live.com
• desktop-hsgcbep
• v20.events.data.microsoft.com
• licensing.mp.microsoft.com
• config.edge.skype.com
• officeclient.microsoft.com
• windows.msn.com
• www.msn.com
• odc.officeapps.live.com
• www.bing.com
• assets.msn.com
• th.bing.com
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

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/0
• http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt0
• http://www.microsoft.com/pki/certs/MicTimStaPCA_2010-07-01.crt0
• http://schemas.microsoft.com/SMI/2016/WindowsSettings
• http://www.microsoft.com/windows0
• http://schemas.microsoft.com/SMI/2005/WindowsSettings
• http://crl.thawte.com/ThawteTimestampingCA.crl0
• http://ts-aia.ws.symantec.com/tss-ca-g2.cer0
• http://ts-crl.ws.symantec.com/tss-ca-g2.crl0
• https://www.verisign.com/rpa
• http://csc3-2010-crl.verisign.com/CSC3-2010.crl0D
• https://www.verisign.com/rpa0
• http://csc3-2010-aia.verisign.com/CSC3-2010.cer0
• https://www.verisign.com/cps0*
• http://logo.verisign.com/vslogo.gif04
• http://crl.verisign.com/pca3-g5.crl04
• http://crl.verisign.com/tss-ca.crl0
• http://crl.microsoft.com/pki/crl/products/CodeSignPCA2.crl0O
• http://office.microsoft.com
• http://ns.adobe.com/Acrobat/RSS/Inbox/feedUI
• http://ns.adobe.com/Acrobat/RSS/Inbox/icon
• http://ns.adobe.com/synchronizer/ttl

Embedded domains

• crl.microsoft.com
• www.microsoft.com
• office.microsoft.com
• schemas.microsoft.com
• crl.thawte.com
• ts-aia.ws.symantec.com
• ts-crl.ws.symantec.com
• www.verisign.com
• csc3-2010-crl.verisign.com
• csc3-2010-aia.verisign.com
• logo.verisign.com
• crl.verisign.com
• ns.adobe.com
• www.w3.org
• purl.org
• csc3-2004-crl.verisign.com

Embedded IP addresses

• 6.0.1.0
• 20.50.73.14
• 4.144.132.114
• 52.123.252.216
• 4.230.171.124
• 172.64.154.167
• 52.110.12.24
• 162.159.142.9

Registry keys

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft

File paths

• C:\A\34\b\bin\amd64\pythonw.pdb
• C:\re\jdk7u45\229\build\windows-amd64\tmp\sun\launcher\tnameserv\obj64\tnameserv.pdb
• t:\clview\x86\ship\0\clview.pdb
• J:\:s:
• T:\:h:
• T:\:d:l:t:
• X:\:`:d:h:l:p:t:x:
• P:\:d:
• g:\acro_root_at\acrobat\systemsynchronizer\synchronizerapp\build\win\release\AdobeCollabSync.pdb
• 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