MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 931f6aeff35cea88af521bc2cdca24164113c47ab3153e148e33d5bce66313f4. 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: 11


Intelligence 11 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 931f6aeff35cea88af521bc2cdca24164113c47ab3153e148e33d5bce66313f4
SHA3-384 hash: ddb77dced30adc96fb1ed4ea4e146aefa8dfa2d0113f6b65c308eff979a050cf944c4c22a95797f820738c33ed238a12
SHA1 hash: 33f74928d66e687c2f981f9219a92d936152cbaf
MD5 hash: 72a9c8f82996953e9fa72e5e0b85afca
humanhash: shade-bakerloo-hydrogen-queen
File name:urgent specification request.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'076'224 bytes
First seen:2021-01-13 07:42:29 UTC
Last seen:2021-01-13 09:38:51 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 24576:7+0Bzipc50LSqCHdfw/2uH5Xa9hnX7fa:7Jzipc5zqCHdouuZmVf
TLSH 4E352A40BBD81700F3BD27BC693040655BF5FB95E6B9E31CF86C506A1BA1E5084BE7A2
Reporter abuse_ch
Tags:exe FormBook geo KOR


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: mail-smail-vm44.hanmail.net
Sending IP: 203.133.180.232
From: 씨맥스광주 <dhboard@hanmail.net>
Subject: 견적의뢰드립니다 - 씨드코
Attachment: urgent specification request.cab (contains "urgent specification request.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
194
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
urgent specification request.exe
Verdict:
Malicious activity
Analysis date:
2021-01-13 09:39:00 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/61a1d7e1-d951-417a-b83c-d368a0f60c4f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/111750/
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Fareit.tc.21251.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/579899
Signature
.NET source code contains potential unpacker
Found malware configuration
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 338992 Sample: urgent specification request.exe Startdate: 13/01/2021 Architecture: WINDOWS Score: 100 37 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->37 39 Found malware configuration 2->39 41 Malicious sample detected (through community Yara rule) 2->41 43 7 other signatures 2->43 10 urgent specification request.exe 3 2->10         started        process3 file4 29 C:\...\urgent specification request.exe.log, ASCII 10->29 dropped 13 urgent specification request.exe 10->13         started        16 urgent specification request.exe 10->16         started        process5 signatures6 53 Modifies the context of a thread in another process (thread injection) 13->53 55 Maps a DLL or memory area into another process 13->55 57 Sample uses process hollowing technique 13->57 59 Queues an APC in another process (thread injection) 13->59 18 explorer.exe 13->18 injected process7 dnsIp8 31 anotherheadache.com 46.23.71.2, 49768, 80 UK2NET-ASGB United Kingdom 18->31 33 machineryhunters.online 23.111.136.146, 49764, 80 HVC-ASUS United States 18->33 35 6 other IPs or domains 18->35 45 System process connects to network (likely due to code injection or exploit) 18->45 22 msiexec.exe 18->22         started        signatures9 process10 signatures11 47 Modifies the context of a thread in another process (thread injection) 22->47 49 Maps a DLL or memory area into another process 22->49 51 Tries to detect virtualization through RDTSC time measurements 22->51 25 cmd.exe 1 22->25         started        process12 process13 27 conhost.exe 25->27         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/931f6aeff35cea88af521bc2cdca24164113c47ab3153e148e33d5bce66313f4/
Threat name:
Win32.Trojan.CrypterX
Create hunting rule
Status:
Malicious
First seen:
2021-01-13 07:43:14 UTC
AV detection:
3 of 46 (6.52%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=smpwv37tltvirl2sdpbm3sreczarhrd2wmkt4feogpk3zztdcp2a._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210113-cepy13kzy2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of UnmapMainImage
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.timoniks.com/rbg/
Unpacked files
SH256 hash:
931f6aeff35cea88af521bc2cdca24164113c47ab3153e148e33d5bce66313f4
MD5 hash:
72a9c8f82996953e9fa72e5e0b85afca
SHA1 hash:
33f74928d66e687c2f981f9219a92d936152cbaf
Link:
https://www.unpac.me/results/67ca3634-8030-4cb0-8549-66ca03830ef0/
SH256 hash:
296620e9308a1069ca98d27c426f25f5c1f87d9240bb371c657571034b0261b5
MD5 hash:
4cf24d41a7882216740280e3294cb853
SHA1 hash:
6bcb31d3dc0a7d71da1067a628168664202769a4
Link:
https://www.unpac.me/results/67ca3634-8030-4cb0-8549-66ca03830ef0/
SH256 hash:
68623783a939ced8d7e00d3fe61803799ae61c563410716c156a3d0a87da7cb3
MD5 hash:
9d7adef402a0f6227755634dc7da11d3
SHA1 hash:
84535182d5c84bd4aa7f39b71e16f397f667f2ad
Link:
https://www.unpac.me/results/67ca3634-8030-4cb0-8549-66ca03830ef0/
SH256 hash:
c347153fdef49fe1c7937bfe439e51c771923677a4b7a5578bd8b88a5e2fc9b2
MD5 hash:
92e611e075c477df421bb505f311dce5
SHA1 hash:
28a969df0932dec813ac1f61184d1e5d98d2014e
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/67ca3634-8030-4cb0-8549-66ca03830ef0/
Parent samples :
fa1e4180024c1bb17610a4c0d6d3fd40b863c34016b131f1ce08fbcc140ce257
ae73e8799690e6e7efe2222fe8a471af2c7f7f0f82dff259434626eac35a2721
931f6aeff35cea88af521bc2cdca24164113c47ab3153e148e33d5bce66313f4
2449800b54909498a549817cc5bd9b8fc610a0d7ef6fd2bfda0d370783da8d32
9a9ac9671ba6e6954776498cf28264d6c1742bc52fb070d7736d83a3582a14c8
e10a18344876f44eea40708f80322df6ec17eea4fec0b7de74c97aab23421600
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/931f6aeff35cea88af521bc2cdca24164113c47ab3153e148e33d5bce66313f4

File information

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

Malspam

Formbook

cab 57f314c58e53b1fe71174408a827ca63beb5359ad07daef3d36c47fa5f2fb3eb

Formbook

Executable exe 931f6aeff35cea88af521bc2cdca24164113c47ab3153e148e33d5bce66313f4

(this sample)

  
Dropped by
MD5 e455e46c6a9c430d4b3f523a99274497
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 57f314c58e53b1fe71174408a827ca63beb5359ad07daef3d36c47fa5f2fb3eb
Cape
Cape
https://www.capesandbox.com/analysis/111750/

Comments