MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df. 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: 18


Intelligence 18 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df
SHA3-384 hash: a093cc3672276dce9957a8fbb9abf4e5299675a235bb897bdf51bcafd04a09d0e5c58dbf20f15e2bdbd58bab27607fd1
SHA1 hash: 714b10ddb7e541d1744e1d6c30f7faa60964cd3e
MD5 hash: c2b8f260535c1260c5888551e04b4463
humanhash: wolfram-chicken-winner-music
File name:WJP_ShipDocs_Feb2026.pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'091'072 bytes
First seen:2026-02-10 07:21:02 UTC
Last seen:2026-02-10 08:19:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'818 x AgentTesla, 19'742 x Formbook, 12'286 x SnakeKeylogger)
ssdeep 24576:053guQmLs/8cnxJrj96zSOabEzS4CR2sXuLEVVictM:xu/L4xh0MKaJXSYQcC
Threatray 30 similar samples on MalwareBazaar
TLSH T1AB3522203358DF65D8B52BFA5135E27453B9AD6EA401D21BCECDACDFB9AAF010460323
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
170
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/ac6a5d58-661f-456b-b755-18f84ff6bb16/
Malware family:
formbook
Create hunting rule
ID:
1
File name:
WJP_ShipDocs_Feb2026.pdf.exe
Verdict:
Malicious activity
Analysis date:
2026-02-10 07:24:32 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/f130be35-8aca-4f5b-8fd9-020ee488d79c

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/52877/
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.34524672.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=698adc6e42fd65534cce341a
Tags:
underscore virus krypt msil
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
krypt masquerade packed
Link:
https://www.filescan.io/uploads/698adc6d981ff1d38a4f7879/reports/090ce7cd-440d-413e-8fdd-7fa1cdd5a3c1/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-02-10T02:24:00Z UTC
Last seen:
2026-02-12T04:53:00Z UTC
Hits:
~100
Detections:
Trojan.MSIL.Crypt.sb VHO:Trojan-PSW.Win32.Convagent.gen Trojan-Spy.Noon.HTTP.ServerRequest PDM:Trojan.Win32.Generic HEUR:Trojan-Spy.MSIL.Noon.gen Backdoor.Agent.HTTP.C&C Trojan-Spy.Win32.Noon.sb Trojan.MSIL.Inject.sb
Link:
https://opentip.kaspersky.com/a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/2331e45c-f523-4620-9433-192b29f9e8c8
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1866501
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
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
Sigma detected: Suspicious Double Extension File Execution
Sigma detected: Suspicious Process Parents
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Unusual module load detection (module proxying)
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1866501 Sample: WJP_ShipDocs_Feb2026.pdf.exe Startdate: 10/02/2026 Architecture: WINDOWS Score: 100 32 www.taivo.life 2->32 34 www.matsutani-fe.com 2->34 36 26 other IPs or domains 2->36 44 Suricata IDS alerts for network traffic 2->44 46 Antivirus detection for URL or domain 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 9 other signatures 2->50 11 WJP_ShipDocs_Feb2026.pdf.exe 3 2->11         started        signatures3 process4 file5 30 C:\Users\...\WJP_ShipDocs_Feb2026.pdf.exe.log, ASCII 11->30 dropped 60 Unusual module load detection (module proxying) 11->60 15 WJP_ShipDocs_Feb2026.pdf.exe 11->15         started        signatures6 process7 signatures8 62 Maps a DLL or memory area into another process 15->62 18 B7w6WFMGrl.exe 15->18 injected process9 dnsIp10 38 www.taivo.life 104.207.66.126, 49721, 49722, 49723 WINNE-IPV4-1US United States 18->38 40 strenth.in 15.197.225.128, 49717, 49718, 49719 TANDEMUS United States 18->40 42 13 other IPs or domains 18->42 21 calc.exe 13 18->21         started        process11 signatures12 52 Tries to steal Mail credentials (via file / registry access) 21->52 54 Tries to harvest and steal browser information (history, passwords, etc) 21->54 56 Modifies the context of a thread in another process (thread injection) 21->56 58 3 other signatures 21->58 24 chrome.exe 21->24         started        26 firefox.exe 21->26         started        process13 process14 28 WerFault.exe 4 24->28         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.43 Win 32 Exe x86
Link:
https://app.malva.re/file/c2b8f260535c1260c5888551e04b4463
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2026-02-10 05:37:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
11
AV detection:
21 of 38 (55.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uv2ybrkmf6kzvt4pkid5yb5hj4b34tmftduehmffwbpzhtevzhpq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
7f9d39908a024cc37cdece4ecc8aa724695ee2873d80ed4b1e7f8f8f3ee7ed5d
Formbook
a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df
Formbook
ac36e1a80e5bce46ba7b0810ee10075cb7fd7c8f0e2603048a8a1e6f0adc7266
Formbook
b32d05c6d0606ae99980ac52e9acbae681e7c35936abca1aa7bbc66bc25bb0e5
Formbook
e5f1feba5c6cd56201fd5eb64c4d9dbfae827f756ebbfeda3cb51f453d465d1b
Formbook
error
Formbook
f5bd11a320b37bb5f168cfa868c8d02de0f697ff0c4010e6f7b21f7e847529c9
Formbook
+ 20 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/260210-h6sqhafz3a/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
SmartAssembly .NET packer
Suspicious use of SetThreadContext
Formbook payload
Formbook family
Formbook
Unpacked files
SH256 hash:
a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df
MD5 hash:
c2b8f260535c1260c5888551e04b4463
SHA1 hash:
714b10ddb7e541d1744e1d6c30f7faa60964cd3e
Link:
https://www.unpac.me/results/73acfac9-efca-4ce0-bdee-21ea093a6ee3/
SH256 hash:
48fa91de316a3b8b9b173548ff297a529e8045cfba133655cb8d7bf2517df628
MD5 hash:
54f2d8dcde429e9fa2c0cef39b6bb0e7
SHA1 hash:
1b0181a02d9f36613fdd5170d1b84a5a8358b2af
Link:
https://www.unpac.me/results/73acfac9-efca-4ce0-bdee-21ea093a6ee3/
SH256 hash:
245c95fb5c4d5c16f9cf07239165b9a632577f65a8424c866d22024da60d4a46
MD5 hash:
0d63b7e05ab7b7bef13008f9a8850c73
SHA1 hash:
343e36f6db4f69cf8a2ead6a7e093935cbee895e
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/73acfac9-efca-4ce0-bdee-21ea093a6ee3/
SH256 hash:
a7f5d6a88f71d2ce2c20fcfdd015a48a6b92b4d669dc56bd7107297e3bf76f2a
MD5 hash:
b77905280df2068a7574070c767214eb
SHA1 hash:
a0c65e78ea1ca8e60c9d11805affd5a778696ce5
Link:
https://www.unpac.me/results/73acfac9-efca-4ce0-bdee-21ea093a6ee3/
SH256 hash:
b186e08899b075fca19e6a907b1f1f53685a7259972a79e68b5c8568ed1170b4
MD5 hash:
132a2cb5d0fe550bfe89fc5ad5a469bb
SHA1 hash:
21e2c788236b578efabade8eb0b1dabd566c02d8
Link:
https://www.unpac.me/results/73acfac9-efca-4ce0-bdee-21ea093a6ee3/
SH256 hash:
bf5eec264969ee9947786b89410fedcdfa4edd09e0ac3ab59b1f44d26f69a5f9
MD5 hash:
0edd5e766d52fccca712eed59a0db942
SHA1 hash:
73a3734dfcf76abd183f77af10b6e9b6d609fd5a
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/73acfac9-efca-4ce0-bdee-21ea093a6ee3/
Parent samples :
55f142f550fa6dcfd1468195bc9b9fdca87714a06e5a8370152119fb10405b32
a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df
3c97c9c3fd33f0deafc90dac2192ca8a44a44732368e02fdafbf35da539091aa
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a57580c54c2f/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df

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:NET
Create hunting rule
Author:malware-lu
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 a57580c54c2f959acf8f5207dc07a74f03be4d8598e843b0a5b05f93cc95c9df

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/52877/

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