MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056
SHA3-384 hash: e85e0216836ba89becb0ae3ce21cfac2f7a0f052c1b3dff20eec5585a532c1a57140a300234922426a69b57f1742df13
SHA1 hash: 79efb4d3733abfa2c2f21ac032dbb1d088d57432
MD5 hash: 61937ddd610f8e4f6dc1d23d0334673a
humanhash: tennis-hydrogen-island-white
File name:MT OMEGA STAR 1 Q88.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:746'496 bytes
First seen:2025-08-05 09:15:44 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:Bxtwb/MphRoDaAtLUtZg9/rCyjWliA/Tx5D86DNiD:BxgM/RoWAtLUtar/iQG7LDNi
Threatray 10 similar samples on MalwareBazaar
TLSH T139F42226ABEEC633E16C57B01471D33112792E9AF921E31B8FD9ADAF3949BF04441742
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 :
1
# of downloads :
62
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
_87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056.exe
Verdict:
No threats detected
Analysis date:
2025-08-05 09:17:44 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/bf0f5b39-b295-49f7-a8fa-fe99acd57459

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/18977/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6891cbea11d7f9b979e582d7
Tags:
virus micro krypt
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Sending a custom TCP request
Сreating synchronization primitives
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 bitmap lolbin lolbin msbuild obfuscated packed packed reconnaissance regsvcs rezer0 roboski schtasks squirrel stego vbc vbnet zero
Link:
https://www.filescan.io/uploads/6891cbe973b8ef6f4affca1c/reports/b54fc073-74d3-45fc-b5c9-b026ed8a42df/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/78a496e6-70b0-4e94-b7e0-37779842e265
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1750396
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Injects a PE file into a foreign processes
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
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)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1750396 Sample: MT OMEGA STAR 1 Q88.exe Startdate: 05/08/2025 Architecture: WINDOWS Score: 100 34 www.br199805.xyz 2->34 36 www.zavico.life 2->36 38 19 other IPs or domains 2->38 46 Suricata IDS alerts for network traffic 2->46 48 Antivirus / Scanner detection for submitted sample 2->48 50 Multi AV Scanner detection for submitted file 2->50 54 4 other signatures 2->54 11 MT OMEGA STAR 1 Q88.exe 3 2->11         started        signatures3 52 Performs DNS queries to domains with low reputation 34->52 process4 file5 32 C:\Users\user\...\MT OMEGA STAR 1 Q88.exe.log, ASCII 11->32 dropped 64 Injects a PE file into a foreign processes 11->64 15 MT OMEGA STAR 1 Q88.exe 11->15         started        signatures6 process7 signatures8 66 Maps a DLL or memory area into another process 15->66 18 nTO8CnJBS3cM8.exe 15->18 injected process9 process10 20 logman.exe 13 18->20         started        signatures11 56 Tries to steal Mail credentials (via file / registry access) 20->56 58 Tries to harvest and steal browser information (history, passwords, etc) 20->58 60 Modifies the context of a thread in another process (thread injection) 20->60 62 3 other signatures 20->62 23 suNTnrZ2adQ.exe 20->23 injected 26 chrome.exe 20->26         started        28 firefox.exe 20->28         started        process12 dnsIp13 40 livelens.click 15.197.225.128, 49722, 49767, 49768 TANDEMUS United States 23->40 42 www.ecolink.group 212.227.172.253, 49759, 49760, 49761 ONEANDONE-ASBrauerstrasse48DE Germany 23->42 44 9 other IPs or domains 23->44 30 WerFault.exe 4 26->30         started        process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
.Net Executable PDB Path PE (Portable Executable) SOS: 0.28 Win 32 Exe x86
Link:
https://app.malva.re/file/61937ddd610f8e4f6dc1d23d0334673a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056/
Verdict:
Malicious
Threat:
VHO:Trojan-Spy.MSIL.Noon
Link:
https://tip.neiki.dev/file/87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2025-08-05 07:09:03 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=q6bz3zlymep2n7jr6u336mih463uohxcohoela3sxjxp3frpibla._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unc_loader_037
Create hunting rule
Similar samples:
050e6ec6548815c54e532f8004c7257e9bec51833e7cfcf2a38185eb48d72ffe
Formbook
199356a613dcda9b44fd3f71d86072d28a5fd48c18587447019b7b99d45973ef
Formbook
229143d66574d5d01e18ec3078b0d3de25b91c21dfb79e9f75032a7d8d555f68
Formbook
87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056
Formbook
ded67530b43d631ec743606859227570de9e18ce9d61a72b2641fdaff6dc78e6
Formbook
error
Formbook
f7a37ab3f4c3f7e67fc347335869a9616f6658f3a45465697a58585ddb7e7caf
Formbook
fde9c39712284a016a2440cba122aae2ab70659bc7d10f8bcc3e43b4fd299da9
Formbook
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250805-k8mndahr8s/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
SmartAssembly .NET packer
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/324b3041-9473-4730-888f-3818a4dae572
Unpacked files
SH256 hash:
87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056
MD5 hash:
61937ddd610f8e4f6dc1d23d0334673a
SHA1 hash:
79efb4d3733abfa2c2f21ac032dbb1d088d57432
Link:
https://www.unpac.me/results/ebd28790-29db-4606-a5c2-afcfc3a9f24d/
SH256 hash:
6231ca045bdb78f90fa4e09e65da692ac4500afff87a00e5772f2a1f3f6b0df5
MD5 hash:
29f1ab351d39eab7ed8eaa2aabc35327
SHA1 hash:
22d8514fc711323c0426c3f5b35c9b37d884c9f3
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/ebd28790-29db-4606-a5c2-afcfc3a9f24d/
Parent samples :
95ea7cad1f5295a05a2084c870724c860063568375f9ac5ea4cfcda022486915
0f35ba4092a1137650826b2cd0eff36eeb58a51c09fb1210199948a2b03a48f3
87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056
f1072b6f2cef8a84384f1d3d5f64905640d41be85aa4966cbf6ada530be721ac
908ea4e10ff30ea0fb4dd724fdb19e1f9c491b443c90cf0957ed6216ff5d800e
6fd471d3b5a60eb2827287c5b805a12d8e4147c5c2ce85585b3e2748a10e6226
9975b81e9f8b7bf220475765a809c03d9462b60f27a06de2b5d867152aca5dad
abf0f414ebeb55c4ee464be758b9f279cebf0779ff269b7ecfe74267797fd251
ab0e1d7e551816ee2e46dfd74c50906118da48af18c6f8d2d91071310cbb7dbe
e4b64ae324a75568f82dd940c4017726c020051668cbb1832e88f4e806abe4e4
576ac760ec2be7d545c01b834dfa888a824f54fc8d68518a64a198e8c30a29aa
8d472caf596f0d5c7a9d1fc2bfc371f55eca7016ffe249409da702227f60a0a2
7e41a89cc3189d021b07d2c2cdcfbf151f498447e73b3539be37bbfa24586fbe
858a1f71c14ad346a95146debe2df736b00654d971bb884e6932db16404ab973
aace9b82b5a361f9fe0ea0d6d0ea6e141cca7ff9761e0d7a2665fd7752a54ffa
SH256 hash:
41f05afc77e61e5ae04b486865fdc040f2baef2a48aa0c6c669cb8cd06bc9bed
MD5 hash:
0e4b10eb5cd9660ae69f8313a2210869
SHA1 hash:
8257c12bc11ee5a97951d1b9f2bafbeb39680771
Link:
https://www.unpac.me/results/ebd28790-29db-4606-a5c2-afcfc3a9f24d/
SH256 hash:
b36e9b2e19d61b16fda25d2dbbd17235178a1e4aed7a9eb42ea7d51651a6524c
MD5 hash:
1f9c8443821ae57e70db9f5ac5e8dede
SHA1 hash:
9dbe99f9015290555fd7fcc77cfca7c6522aa7c1
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/ebd28790-29db-4606-a5c2-afcfc3a9f24d/
SH256 hash:
929f68ecbc742673a03b398ee461f40d1b3d528fe3bfd4a37b6fd6b65fb97f94
MD5 hash:
489d02e73ca15a65d2254b2bf5cebca1
SHA1 hash:
a242c550f61bcbe65e1dde36e0f7ce6cdc126218
Link:
https://www.unpac.me/results/ebd28790-29db-4606-a5c2-afcfc3a9f24d/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/87839de57861/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056

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:NETexecutableMicrosoft
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
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Malspam

Formbook

Executable exe 87839de578611fa6fd31f537bf3107e7b7471ee271dc458372ba6efd962f4056

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/18977/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

Comments