MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21. 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: 15


Intelligence 15 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21
SHA3-384 hash: 9c4b0d432f303d69249ff9a5205e0fc637e6359a58f5bc6f48165839d06db20122988a7b43df7bbfc67f44c5588e046b
SHA1 hash: 8e98c927026eea8d0414f27be34b9d0ee3f359fa
MD5 hash: 4c65007fc8d04ec806fea9ae8697b290
humanhash: blossom-bulldog-thirteen-batman
File name:839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21
Download: download sample
Signature Formbook
Create hunting rule
File size:1'028'608 bytes
First seen:2026-06-08 08:28:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'066 x AgentTesla, 20'016 x Formbook, 12'352 x SnakeKeylogger)
ssdeep 24576:dkhwZtExac1grVSGBeN10bdaTob7M5120TrFDjWrd+z7sDH8sO:d0wYh1kVSp0h8m7C2gtjWrEQz8R
Threatray 286 similar samples on MalwareBazaar
TLSH T114251210664ED826C09A1F754C72D2F81BB56EA8ED31C6079FED3FBFB83A2615805346
TrID 73.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.6% (.EXE) Win64 Executable (generic) (6522/11/2)
4.5% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
dhash icon e89c8692929282c2 (7 x Formbook, 2 x SnakeKeylogger, 1 x AgentTesla)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
70
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/ea9163c1-d9dd-4720-ba5f-8066468b11f8/
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/69510/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a267d66ae2f98c00a68b9d2
Tags:
virus shell micro
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Adding an exclusion to Microsoft Defender
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
packed remcos vbnet
Link:
https://www.filescan.io/uploads/6a267d3c1f652d68656d8fec/reports/5c6960d0-02fa-46d8-9309-440e0a0b7b83/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-05-21T00:05:00Z UTC
Last seen:
2026-06-09T18:18:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/401fa5aa-c595-4b22-bc25-03df1ee2e28b
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21/
Threat name:
ByteCode-MSIL.Trojan.MassLogger
Create hunting rule
Status:
Malicious
First seen:
2026-05-21 03:00:03 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
25 of 36 (69.44%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
zgrat
Create hunting rule
Similar samples:
0c82b648de097a84476eae0187e6ae187b4ec872a57cb2dd80aa2c5fdac05df3
Formbook
0cfbc10a408c5747c977cbac7e92bee4aaac42f6fb8d3d73b6e3b0de05208ba0
Formbook
25230a687002161160427e213dcdd2a17ae50d9b3ba9679916e238b55b61a6d2
Formbook
2887e94cae0ef35418957b8ac546a55ea8f80446395c43e1c484792ea2f6f469
Formbook
2d9f8c6e00839f7c513c080deb360c141eded1429ccadabf16fb2a8650e8436b
Formbook
3c97c9c3fd33f0deafc90dac2192ca8a44a44732368e02fdafbf35da539091aa
Formbook
64e2d169d90930905374a2f504cfa6a06276333533875b7a7d076cb2c472ae6a
Formbook
839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21
Formbook
e4ff62b66b02a6f78870344b002d83ae80391d1cc0b1651085f23f28d41f027b
Formbook
error
Formbook
+ 276 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260608-kda14aav2n/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21
MD5 hash:
4c65007fc8d04ec806fea9ae8697b290
SHA1 hash:
8e98c927026eea8d0414f27be34b9d0ee3f359fa
Link:
https://www.unpac.me/results/d930fc50-3829-48c1-a203-d428e2dfbc38/
SH256 hash:
cb2770186f4dea2e701d5a7cbf42933ef3ebd2014c10e4ffe36a7a586d525391
MD5 hash:
4e49b5a1b1fc9c16bc3f45b73902d6cf
SHA1 hash:
66300326c57ed1c8bfbeee7dc51d338b42e80001
Link:
https://www.unpac.me/results/d930fc50-3829-48c1-a203-d428e2dfbc38/
SH256 hash:
30b8da6a6c14adb7188e67f556e4e4abdc4e0a47db4008b7a2930c21dbdf59c2
MD5 hash:
c25420b73d0fe1dd63cf91b94c810225
SHA1 hash:
8d54643580d5d5952e74ec53ebf93b91e398e9de
Link:
https://www.unpac.me/results/d930fc50-3829-48c1-a203-d428e2dfbc38/
SH256 hash:
bc182f2d934b3e8f2d8c93739d8c8383e60223af16c62359a10831f76d9d168a
MD5 hash:
e01f8eac49eefbab201ec555dc9ae891
SHA1 hash:
9539cb2e684aded0ee0d1213b1d2679220bef72d
Link:
https://www.unpac.me/results/d930fc50-3829-48c1-a203-d428e2dfbc38/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/839827a2b7f3/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/839827a2b7f35c91f54ada0f8cee7b68bb52fce97d3199f740ad975beb24dd21

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

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/69510/

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