MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 661cafba8f1ca7c7b53b269699e86a6386ffb3649eacfd81d70f806552ca4164. 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: 13


Intelligence 13 IOCs YARA 4 File information Comments
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SHA256 hash: 661cafba8f1ca7c7b53b269699e86a6386ffb3649eacfd81d70f806552ca4164
SHA3-384 hash: 5c45fc83012c6055296ff6d4f65fc9c30e990b9ab3db635741e19a8608bf022e8dbb6b696289d18a13fd2239da34ddcd
SHA1 hash: 72475e208f5da9b971752a3f32ac9841beb751db
MD5 hash: 30ef287dc58726f8fa6c7c609971d54b
humanhash: nineteen-fish-timing-magnesium
File name:BahcfFNy25bmV1c.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:486'400 bytes
First seen:2021-09-07 06:24:19 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 12288:tVTlqaVoLSX+ySrZ6jAwKx9oPsfW0oLJ03LFqNGH5:VqauLSFSrZ6jIx9oPsfJl5
Threatray 9'239 similar samples on MalwareBazaar
TLSH T179A42308A3995F1FC56D10F911587A420BFCD7AF34A7D3D50EB268AD6BCA7E04142B8B
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
223
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
BahcfFNy25bmV1c.exe
Verdict:
Malicious activity
Analysis date:
2021-09-07 07:02:03 UTC
Tags:
trojan formbook stealer covid19
Link:
https://app.any.run/tasks/4cfd6484-a650-4bbe-9283-0c4b686ff127

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/185894/
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
Forced shutdown of a system process
Unauthorized injection to a system process
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c12d491a-0637-4b43-8c8d-9a7d04e4047c
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/846430
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
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: 478861 Sample: BahcfFNy25bmV1c.exe Startdate: 07/09/2021 Architecture: WINDOWS Score: 100 31 www.ai-eu.com 2->31 33 www189.wixdns.net 2->33 35 3 other IPs or domains 2->35 43 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->43 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 10 other signatures 2->49 11 BahcfFNy25bmV1c.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\...\BahcfFNy25bmV1c.exe.log, ASCII 11->29 dropped 59 Writes to foreign memory regions 11->59 61 Injects a PE file into a foreign processes 11->61 15 RegSvcs.exe 11->15         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 15->63 65 Maps a DLL or memory area into another process 15->65 67 Sample uses process hollowing technique 15->67 69 2 other signatures 15->69 18 explorer.exe 15->18 injected process9 dnsIp10 37 www.greatnesspays.com 91.195.240.13, 49732, 80 SEDO-ASDE Germany 18->37 39 www.tonyasellslashes.com 74.208.236.189, 49734, 80 ONEANDONE-ASBrauerstrasse48DE United States 18->39 41 7 other IPs or domains 18->41 51 System process connects to network (likely due to code injection or exploit) 18->51 22 chkdsk.exe 18->22         started        signatures11 process12 signatures13 53 Modifies the context of a thread in another process (thread injection) 22->53 55 Maps a DLL or memory area into another process 22->55 57 Tries to detect virtualization through RDTSC time measurements 22->57 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/661cafba8f1ca7c7b53b269699e86a6386ffb3649eacfd81d70f806552ca4164/
Threat name:
ByteCode-MSIL.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2021-09-07 04:45:18 UTC
AV detection:
12 of 43 (27.91%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=myok7oupdst4pnj3e2ljt2dkmodp7m3et2wp3aoxb6agkuwkifsa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
24b2084808676120ed7c9057e7d830c7d78b18c1fe01558c6f33e47ff6aeca79
Formbook
5955bf6676d1f4d7e9e12f2201674381535d24bd88bd480feda425839841ecaf
Formbook
6b89423281b15d82bd2dabd24a68d7a1a7744c12ca2e951913f7361a271e34e5
Formbook
6b919aedc991817793774e45c3e84c4fd5ec2b6f299566101ad1392fe47595f3
Formbook
73542f2e6652897764dfeeffa70ebc1ccebeb5681bc7a049ec875771c995aa4a
Formbook
9b4f5703c5ab1e5e1ca54fbdf0412956a4738217a0c0cc4c2872090944dbee74
Formbook
+ 9'229 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:p90g loader rat
Link:
https://tria.ge/reports/210907-g6ps6scac9/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.homeofficecovid.com/p90g/
Unpacked files
SH256 hash:
2b888abea02a9b3b440a7b8938f4a3fad8ff2d1e351c6c967d687e9702d0413d
MD5 hash:
4222053c38d6fccf2b6b84274f12e15a
SHA1 hash:
fec32f51e14126ea316faaa5789dfa2e64f7cc03
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/012fca76-c458-4e93-8753-6e2517bde89a/
Parent samples :
6b89423281b15d82bd2dabd24a68d7a1a7744c12ca2e951913f7361a271e34e5
6b919aedc991817793774e45c3e84c4fd5ec2b6f299566101ad1392fe47595f3
9b4f5703c5ab1e5e1ca54fbdf0412956a4738217a0c0cc4c2872090944dbee74
24b2084808676120ed7c9057e7d830c7d78b18c1fe01558c6f33e47ff6aeca79
661cafba8f1ca7c7b53b269699e86a6386ffb3649eacfd81d70f806552ca4164
SH256 hash:
9a569be1313734a7a5657149f890204e1246833e80ac0e45c15b9ebc972cfa99
MD5 hash:
db1ca79a10eb8debc020653b67a41ed4
SHA1 hash:
c9aff868749946879d85e0c75c11a085d3c244c2
Link:
https://www.unpac.me/results/012fca76-c458-4e93-8753-6e2517bde89a/
SH256 hash:
6c8bf199203eba8a6e0ddb4f3564a84ec4249d5f9aeb6a7576cc3ad804d91ef5
MD5 hash:
cd5ee92c20ac941c0340c5a0ce4555e9
SHA1 hash:
1f80cdc7eb360b77c5dc2690654aa8ad2b1b1b1d
Link:
https://www.unpac.me/results/012fca76-c458-4e93-8753-6e2517bde89a/
SH256 hash:
661cafba8f1ca7c7b53b269699e86a6386ffb3649eacfd81d70f806552ca4164
MD5 hash:
30ef287dc58726f8fa6c7c609971d54b
SHA1 hash:
72475e208f5da9b971752a3f32ac9841beb751db
Link:
https://www.unpac.me/results/012fca76-c458-4e93-8753-6e2517bde89a/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/661cafba8f1c/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/661cafba8f1ca7c7b53b269699e86a6386ffb3649eacfd81d70f806552ca4164

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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 661cafba8f1ca7c7b53b269699e86a6386ffb3649eacfd81d70f806552ca4164

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/185894/

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