MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fa1f9f5deac24c735baa77eb5b76b9057b3fea6c2bc7f2bf7f16420a8b48f00c. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


CobaltStrike


Vendor detections: 10


Maldoc score: 15


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fa1f9f5deac24c735baa77eb5b76b9057b3fea6c2bc7f2bf7f16420a8b48f00c
SHA3-384 hash: 3e7b53744d16ba97d38f917f4f5047f8d092232d3434c23ebc4c78582b24e003b12e1976598ab13186fdf890ea6c4a06
SHA1 hash: bc20c8fa23c253ec139b7a06081ada6cb7a60f76
MD5 hash: 8299c65b3c9e10900aaedf20da44cea6
humanhash: december-yankee-india-california
File name:1(1).dotm
Download: download sample
Signature CobaltStrike
Create hunting rule
File size:23'168 bytes
First seen:2021-11-06 02:24:30 UTC
Last seen:Never
File type:Word file doc
MIME type:application/vnd.openxmlformats-officedocument.wordprocessingml.document
ssdeep 384:t+5mtPYFpRRO9z3mDrBQei85RllJoWInw57j8v55nqPbhepJ/NwUmWpU3rUl:oCMRMzdARDJPInojinqMpleipU3Al
TLSH T1B6A2BF3CC315A024DEA7CA7CC4143AF6B1358726AF1A509D72AA67DDD600863075FAEE
Reporter JAMESWT_WT
Tags:2 CobaltStrike doc xiaodi8

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 15
OLE dump

MalwareBazaar was able to identify 7 sections in this file using oledump:

Section IDSection sizeSection name
A1415 bytesPROJECT
A271 bytesPROJECTwm
A313592 bytesVBA/NewMacros
A4999 bytesVBA/ThisDocument
A53823 bytesVBA/_VBA_PROJECT
A6529 bytesVBA/dir
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
AutoExecAutoOpenRuns when the Word document is opened
AutoExecAuto_OpenRuns when the Excel Workbook is opened
AutoExecWorkbook_OpenRuns when the Excel Workbook is opened
IOCrundll32.exeExecutable file name
SuspiciousEnvironMay read system environment variables
SuspiciousLibMay run code from a DLL
SuspiciousVirtualAllocExMay inject code into another process
SuspiciousWriteProcessMemoryMay inject code into another process
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
565
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
exploit.docx
Verdict:
Malicious activity
Analysis date:
2021-11-06 02:22:21 UTC
Tags:
generated-doc
Link:
https://app.any.run/tasks/efe4fa3f-3c6e-4a75-944c-be17add27b73

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
MiscreantPunch.EvilMacro.ProcessCreationPrimitivesDLL.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.AutoClobberHowSoonIsNow.20200707.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.EvilShellZExecTemplateGalaxie.20210524.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.PolizyKillzRunningDownADream.20210527.UNOFFICIAL
Create hunting rule

Doc.Macro.Injection-6355574-0
Create hunting rule

Doc.Downloader.Generic-6698421-0
Create hunting rule

Doc.Exploit.Generic-6923078-0
Create hunting rule

Result
Verdict:
Malicious
File Type:
Word File with Macro
Link:
https://app.docguard.net/fa1f9f5deac24c735baa77eb5b76b9057b3fea6c2bc7f2bf7f16420a8b48f00c/results/dashboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cobalt evasive http macros macros-on-open rundll32
Link:
https://www.filescan.io/uploads/6185e781d8143ea269ccbea0/reports/8c4b3d18-f185-494b-a140-edbdae1f018f/overview
Result
Threat name:
Metasploit
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/884423
Signature
C2 URLs / IPs found in malware configuration
Creates a thread in another existing process (thread injection)
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with base64 encoded strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to WSH operations (process, registry, environment, or keystrokes)
Document exploit detected (process start blacklist hit)
Found malware configuration
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Suspicious Rundll32 Without Any CommandLine Params
System process connects to network (likely due to code injection or exploit)
Yara detected Metasploit Payload
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fa1f9f5deac24c735baa77eb5b76b9057b3fea6c2bc7f2bf7f16420a8b48f00c/
Threat name:
Script-Macro.Downloader.Bartallex
Create hunting rule
Status:
Malicious
First seen:
2021-11-05 18:48:00 UTC
AV detection:
31 of 44 (70.45%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7ipz6xpkyjghgw5ko7vvw5vzav5t72tmfpd7fp37czbavc2i6aga._file
Result
Malware family:
metasploit
Create hunting rule
Score:
  10/10
Tags:
family:metasploit backdoor macro trojan
Link:
https://tria.ge/reports/211106-cwat2sdcb2/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Blocklisted process makes network request
MetaSploit
Process spawned unexpected child process
Malware Config
C2 Extraction:
http://47.94.236.117:9999/aDBu
Malware family:
Cobalt Strike
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/fa1f9f5deac2/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fa1f9f5deac24c735baa77eb5b76b9057b3fea6c2bc7f2bf7f16420a8b48f00c

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

CobaltStrike

Word file doc fa1f9f5deac24c735baa77eb5b76b9057b3fea6c2bc7f2bf7f16420a8b48f00c

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1756026/
  
Delivery method
Distributed via web download

Comments