MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488. 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: 12


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488
SHA3-384 hash: 28b0d87da4487e4d2fa0a0634ea7ed26f906365301187781fa388a7f9df16f45d7ff8c42c22666d52579a468fbd0dbb7
SHA1 hash: b4de1b62ee1775c0e10fe0442cd1b6b3ef75146b
MD5 hash: 5f36a5d12506389cb097a59838155c52
humanhash: bravo-minnesota-montana-connecticut
File name:pay $.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:570'368 bytes
First seen:2021-09-10 10:17:16 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:+ulcmMfSlke0yWYJkjVrzgFOUjrK0frqF3DSFtmW2WWxjWtv++:nyQEVrzo32YFtA2B++
Threatray 9'131 similar samples on MalwareBazaar
TLSH T1B7C4011C77593897DABE81BCD11782158378E103455FFBDEACEAA5F866823D68C012E3
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
249
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
pay $.exe
Verdict:
Malicious activity
Analysis date:
2021-09-10 10:18:44 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/1901505f-00de-4369-b10b-796337c97a3f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/186851/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching a process
Creating a file
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/87b7d795-9722-40f0-a2e6-5233bd8575f0
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/848718
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
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
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 481149 Sample: pay $.exe Startdate: 10/09/2021 Architecture: WINDOWS Score: 100 35 www.beenationgear.com 2->35 37 td-balancer-euw2-6-109.wixdns.net 2->37 39 4 other IPs or domains 2->39 47 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->47 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 9 other signatures 2->53 11 pay $.exe 3 2->11         started        signatures3 process4 file5 33 C:\Users\user\AppData\Local\...\pay $.exe.log, ASCII 11->33 dropped 63 Writes to foreign memory regions 11->63 65 Injects a PE file into a foreign processes 11->65 15 RegSvcs.exe 11->15         started        18 RegSvcs.exe 11->18         started        20 RegSvcs.exe 11->20         started        signatures6 process7 signatures8 67 Modifies the context of a thread in another process (thread injection) 15->67 69 Maps a DLL or memory area into another process 15->69 71 Sample uses process hollowing technique 15->71 73 Queues an APC in another process (thread injection) 15->73 22 explorer.exe 15->22 injected 75 Tries to detect virtualization through RDTSC time measurements 18->75 process9 dnsIp10 41 www.kaizensportscoaching.com 185.151.30.167, 49783, 80 TWENTYIGB United Kingdom 22->41 43 wmscloud.net 45.158.12.87, 49782, 80 NETINTERNETNetinternetBilisimTeknolojileriASTR Turkey 22->43 45 10 other IPs or domains 22->45 55 System process connects to network (likely due to code injection or exploit) 22->55 26 colorcpl.exe 22->26         started        signatures11 process12 signatures13 57 Modifies the context of a thread in another process (thread injection) 26->57 59 Maps a DLL or memory area into another process 26->59 61 Tries to detect virtualization through RDTSC time measurements 26->61 29 cmd.exe 1 26->29         started        process14 process15 31 conhost.exe 29->31         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2021-09-10 08:33:26 UTC
AV detection:
16 of 28 (57.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ipmdcyloeoqdybkzog6by7e24duh6sizo3tsz2h2ab2gcdyaisea._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1dc173b24c0b503a394568e4a1fff7887dd739cc287e529f25b173dbfea4010b
Formbook
34066150ffa7efa505b8d2246925cd8a32f83b9609438ae76aa27cef7388054d
Formbook
34f75f8458b1f58bdb1e8ff1a46270f98c6d246d213413cd0c4a7708e15e82c9
Formbook
4a91d8f52d07bcd7fde157c6b56e2881c4abba94a0f7921633da4ae2bba53074
Formbook
5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c
Formbook
7af335cb2a2646ddadf12f730585a217523da868aaeb12ba621b367c1b942693
Formbook
ab4795f656b54e9388c89d6a4df52747510fa418bdb50aa3bafd7b332ef1ff81
Formbook
c840ee368fcab5974485c16fc456b1dc1923cc5e113ce6a96f6f314a7ec5ac94
Formbook
+ 9'121 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:t75f loader rat suricata
Link:
https://tria.ge/reports/210910-mbyeqadadq/
Behaviour
Modifies registry class
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
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.vertexnailsblaine.com/t75f/
Unpacked files
SH256 hash:
034c645316c78acb2b9110f9bfd8b840b981489bab385e8c39912ec5c7c4f1c9
MD5 hash:
d17b3ace9f0ca124101674d27328cbf6
SHA1 hash:
8ed2472b79df133a2d6cc73cbed726c444b91bff
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/dabd68fb-f1f3-4e44-83bd-8e86b512e50c/
Parent samples :
7af335cb2a2646ddadf12f730585a217523da868aaeb12ba621b367c1b942693
5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c
c840ee368fcab5974485c16fc456b1dc1923cc5e113ce6a96f6f314a7ec5ac94
34f75f8458b1f58bdb1e8ff1a46270f98c6d246d213413cd0c4a7708e15e82c9
4a91d8f52d07bcd7fde157c6b56e2881c4abba94a0f7921633da4ae2bba53074
43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488
SH256 hash:
1d602688121ced051da5486621b4ff3f924d736277aac7095167decc6fbc1ad6
MD5 hash:
c39aa8ec176906fdd4b8788c5d01f073
SHA1 hash:
f82b2078104f789caa3533eb91f316a7e7d19f5c
Link:
https://www.unpac.me/results/dabd68fb-f1f3-4e44-83bd-8e86b512e50c/
SH256 hash:
c0ee1071e444f415f8b62856a0896f3b22e563f1bb4f03d14142583efe49a565
MD5 hash:
29db2e114b88ae1f6a00c9aa71690043
SHA1 hash:
ec82db71443556a5b320357b0b8b09e70ec1db9c
Link:
https://www.unpac.me/results/dabd68fb-f1f3-4e44-83bd-8e86b512e50c/
SH256 hash:
43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488
MD5 hash:
5f36a5d12506389cb097a59838155c52
SHA1 hash:
b4de1b62ee1775c0e10fe0442cd1b6b3ef75146b
Link:
https://www.unpac.me/results/dabd68fb-f1f3-4e44-83bd-8e86b512e50c/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/43d831616e23/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488

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:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

Executable exe 43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/186851/

Comments