MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b5fcf18c0ac1815c33ea1a6691bd69f1897b772184231beaf1e4f3f92882ae3e. 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


Formbook


Vendor detections: 10


Intelligence 10 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b5fcf18c0ac1815c33ea1a6691bd69f1897b772184231beaf1e4f3f92882ae3e
SHA3-384 hash: 77fca98c73d5a636405d15144c3a7a84f4e4958b0788451a81c340ceddfd90bd3ece5827891674fd236965a77e31ab9d
SHA1 hash: ec1670ccde7f7c302c00db188549de1a40172a32
MD5 hash: 225a75ba4e699caa3738ea525da05fe4
humanhash: carpet-bakerloo-west-charlie
File name:39002938029_pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:265'136 bytes
First seen:2022-08-31 11:59:42 UTC
Last seen:2022-09-05 11:41:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 6144:Tvj1l6iY6rO1aI/XNDulPiYOLkRe3V+VB8555hAjhEOH/Mc:7j1lpTrwDlDwbytQLgXqMc
TLSH T1F344128660F55415FEA707325DDE83228E30E6D8F080D3EF11A8A6550DF43D8AB6E7B6
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon d2e8ecb2b2a2b282 (106 x AgentTesla, 106 x Formbook, 24 x RedLineStealer)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
267
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/306815/
Detection(s):
SecuriteInfo.com.Trojan.DownloaderNET.345.25151.20051.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a file
Searching for synchronization primitives
Сreating synchronization primitives
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
formbook obfuscated overlay packed
Link:
https://www.filescan.io/uploads/630f4dc55e025f2e7b040e33/reports/4d53d44d-3561-41e8-abeb-5688b43579ab/overview
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1061547
Behaviour
Behavior Graph:
n/a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b5fcf18c0ac1815c33ea1a6691bd69f1897b772184231beaf1e4f3f92882ae3e/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2022-08-30 06:07:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wx6pddakygavym7kdjtjdplj6gexw5zbqqrrx2xr4tz7skecvy7a._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:s3s3 rat spyware stealer trojan
Link:
https://tria.ge/reports/220831-n6bd4sdhak/
Behaviour
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook payload
Formbook
Unpacked files
SH256 hash:
072f4f8ae3bf501da1075c9689b1e76d2f3def6d05686be3af0f8a90f965d784
MD5 hash:
9d3c6d818a558a5718f0bc65bb953efb
SHA1 hash:
0631e3047afd1443452de5d323f2910eb371b75f
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Link:
https://www.unpac.me/results/883ff7d4-cbe2-4518-ae69-9615f0a4c980/
Parent samples :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 hash:
0d0dfb3197fa15799caa07f5091211061e0182e28997677361447c2819187a55
MD5 hash:
dc3cde515c07195e71f946be0dbe34b3
SHA1 hash:
aa7d0b7568c8403c0e7e124db51834c8de31669c
Link:
https://www.unpac.me/results/883ff7d4-cbe2-4518-ae69-9615f0a4c980/
SH256 hash:
8f781e773ded9721950bad0ead9854d707b4bf525e4cb24dece326a028909fc2
MD5 hash:
a3abf4d07fdc84a52d5d8af8b221d9b9
SHA1 hash:
441e43a6ef12f5118d0493f4c70aa5fd8ec7987d
Link:
https://www.unpac.me/results/883ff7d4-cbe2-4518-ae69-9615f0a4c980/
SH256 hash:
b5fcf18c0ac1815c33ea1a6691bd69f1897b772184231beaf1e4f3f92882ae3e
MD5 hash:
225a75ba4e699caa3738ea525da05fe4
SHA1 hash:
ec1670ccde7f7c302c00db188549de1a40172a32
Link:
https://www.unpac.me/results/883ff7d4-cbe2-4518-ae69-9615f0a4c980/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b5fcf18c0ac1815c33ea1a6691bd69f1897b772184231beaf1e4f3f92882ae3e

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

Malspam

Formbook

Executable exe b5fcf18c0ac1815c33ea1a6691bd69f1897b772184231beaf1e4f3f92882ae3e

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/306815/

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