MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d. 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 25 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d
SHA3-384 hash: 28ffa47543e9cfb8f67704080577d16fd5f66185a2b59a8b7aecce7e681ca2dd4177c897c583e0058d1698ef63bfe2f1
SHA1 hash: 4789d7e27873af76f5b8e23e35088c2202af196b
MD5 hash: 889b35545a9ffb3d9b5410e0b72dcbf0
humanhash: six-rugby-may-nine
File name:4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d
Download: download sample
Signature Formbook
Create hunting rule
File size:1'012'736 bytes
First seen:2026-08-10 14:31:43 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'190 x AgentTesla, 20'337 x Formbook, 12'364 x SnakeKeylogger)
ssdeep 24576:2j/Og31Iw3GpiEsjgnIefOf0NeCsQf0hC7EG8O4fw49oL:8Pl3EEvew0jH7iPm
TLSH T10B2512A47BE5DF15D9A50BF90874C03043706EAEA066E306CDD5EEDBB42FB6254682C3
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
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
46
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/538eeafb-4831-43a1-92d7-b529a8a78c0b/
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/79911/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a service
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
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)
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
entropy packed vbnet
Link:
https://www.filescan.io/uploads/6a79e10e5ca504a8496e2a56/reports/0800b231-4b3f-4c06-8835-e826402728d6/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-07-19T04:01:00Z UTC
Last seen:
2026-08-06T04:29:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/29d405cc-273f-4919-8375-d358ffb2cf2f
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d/
Threat name:
ByteCode-MSIL.Trojan.PureLogsStealer
Create hunting rule
Status:
Malicious
First seen:
2026-07-19 07:19:43 UTC
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/260810-rx4k3s1bpe/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
SmartAssembly .NET packer
Suspicious use of SetThreadContext
Adds Run key to start application
Executes dropped EXE
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d
MD5 hash:
889b35545a9ffb3d9b5410e0b72dcbf0
SHA1 hash:
4789d7e27873af76f5b8e23e35088c2202af196b
Link:
https://www.unpac.me/results/cb77f1c9-e19c-4349-ac2a-49e4e34946a8/
SH256 hash:
01ff3e706f0f3928207b5e020eebb9ed38428dfbbf0f8c46aeec328b73519160
MD5 hash:
bbb0d2ca9a21d5a1f6c9059e108ea3ee
SHA1 hash:
5accd45f4a70a26b6ce07e04cc3820e99187a818
Link:
https://www.unpac.me/results/cb77f1c9-e19c-4349-ac2a-49e4e34946a8/
SH256 hash:
7d35afa6ed3de62a50f61c00d8eeb9acbf290e12027c4e554640c0cafa5210c4
MD5 hash:
c4c334b16543b8d3c5a63b9b8bfce18f
SHA1 hash:
ecfb4a4cf5b08cfd8ce08a91e92b5fb3e312f864
Link:
https://www.unpac.me/results/cb77f1c9-e19c-4349-ac2a-49e4e34946a8/
SH256 hash:
04a6774ed1320e637d2d0da7e75ae766d8036d1b5a9c4ab89f0d4cf9ad17965f
MD5 hash:
2a4b82eb164d84f5373c2e397db4f934
SHA1 hash:
6cfd1773a29670dd4b71ce9961570a4ea1636ce7
Link:
https://www.unpac.me/results/cb77f1c9-e19c-4349-ac2a-49e4e34946a8/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4c8b29d0734f/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/4c8b29d0734ffb31f6811c8510aab950ae26ab49cff12bf8199933df10daa09d

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
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:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/

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/79911/

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