MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e. 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: 16


Intelligence 16 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e
SHA3-384 hash: 440460693695bcd339083fdd6596992556cc76ef45933c3717967c82db095711396e041c4463867a3bac5a5f243e4e51
SHA1 hash: b1a066e08a8d448f88a8f50ab3403561de3066e9
MD5 hash: a4109f81903bedb97a08c5a233165282
humanhash: video-burger-batman-nevada
File name:66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e
Download: download sample
Signature Formbook
Create hunting rule
File size:779'776 bytes
First seen:2025-10-09 13:58:58 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:lgQ2AdLgEqD5ClZfyYMeVUw1MwZ9rstTMGIE8nInJiS83M+nNk28ED4u+nx7untZ:lgQheNkNBliw64GI5PM+iODE7wpfyIvZ
TLSH T106F40254139ADF13E4A10BF009B0D3B503786E89A822D3079FFABDDFB8397616954297
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 adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
71
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
_66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e.exe
Verdict:
No threats detected
Analysis date:
2025-10-09 14:03:44 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/8b38f41f-6c72-454a-bab9-c6a12338802b

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/31321/
Detection(s):
SecuriteInfo.com.Variant.Genie.8DN.21.21650.21237.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68e7bfd27f305fa2545df757
Tags:
shell virus msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
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:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 bitmap lolbin msbuild obfuscated packed packed reconnaissance regsvcs rezer0 roboski schtasks stego vbc vbnet zero
Link:
https://www.filescan.io/uploads/68e7bffdd4a0085473c58398/reports/132c1bc6-ab16-4aa8-8199-a97a01c00588/overview
Verdict:
Malicious
Labled as:
Genie.8DN.Generic
Link:
https://www.hybrid-analysis.com/sample/66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-17T03:41:00Z UTC
Last seen:
2025-10-10T04:20:00Z UTC
Hits:
~1000
Detections:
Trojan-Spy.Win32.Noon.sb Trojan.MSIL.Taskun.sb Trojan.MSIL.Inject.sb Trojan.MSIL.Crypt.sb HEUR:Trojan-PSW.MSIL.Agensla.gen Trojan-Spy.Noon.HTTP.ServerRequest PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C
Link:
https://opentip.kaspersky.com/66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5d6969a6-2fa7-4ab3-8451-db4ef0caa389
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.45 Win 32 Exe x86
Link:
https://app.malva.re/file/a4109f81903bedb97a08c5a233165282
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2025-09-17 06:39:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
27 of 36 (75.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=mzmz32u2ioi65wmquy2npco2ioj6xz55go4kcgxpllvsxtkomiha._file
Verdict:
malicious
Label(s):
unc_loader_078
Create hunting rule
unc_loader_037
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/251009-rbl4xatwgz/
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
Formbook payload
Formbook
Formbook family
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/dda0c9cd-03de-42d2-8ae9-4dcdb6f207ab
Unpacked files
SH256 hash:
66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e
MD5 hash:
a4109f81903bedb97a08c5a233165282
SHA1 hash:
b1a066e08a8d448f88a8f50ab3403561de3066e9
Link:
https://www.unpac.me/results/f86679c8-f5dc-491d-9252-46928250fd2d/
SH256 hash:
63ee522859285b9f3d27990261c457cbcc56f842a2337a162d395fec944b3f16
MD5 hash:
594885b9228eb0a40cb24d959ecc34e7
SHA1 hash:
0b34f1c708d8ca451c63020ce44ef69965469e4d
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/f86679c8-f5dc-491d-9252-46928250fd2d/
SH256 hash:
1041b538ccbc7d66e59247ef7551cde9b6c282843541585e9190a8e2e3943b12
MD5 hash:
e870d1e8f3791ccc141f85f40fd2972b
SHA1 hash:
150919ee289cffa6feb40ab8261f620dd7e26aac
Link:
https://www.unpac.me/results/f86679c8-f5dc-491d-9252-46928250fd2d/
SH256 hash:
7c32c98bef725bb66a30f348652841de8102af19c65d34a52e65771ae09e38d1
MD5 hash:
74a92f932bad193caa26b82f16dad7b7
SHA1 hash:
ab4d3edcc4887ad24eceede964e1066e1eb04e76
Link:
https://www.unpac.me/results/f86679c8-f5dc-491d-9252-46928250fd2d/
SH256 hash:
6b74227e7599ba1678ecdfc59828defd288a57a64920808791dc528f2c4e6c1a
MD5 hash:
187ffe36547bdd8cfbc66dd716dcaa98
SHA1 hash:
5c1c567f2b53404dfaaeaf13174fb4c2725286c1
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/f86679c8-f5dc-491d-9252-46928250fd2d/
Parent samples :
bb41674ddf9e288e3bf546dae1c5961bf515876dfbd4f78e16bbff0a590cacec
52aa545f64500659257ce324193e1e2ca1b06fe7e84873bcdca15db4e0aaba1a
66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e
c8a1503e8dfce4ab2af0bd927f216cda426007cb60f7baa638f4bf4ed74656f8
bac9500e882b2ec0a430edd0a2fe89609f4ccb60befa4c46cb95281c480f3f11
b940e236d07bfe37f26f27a9cd08e5a3038e4b5529fbdfb385723873ba742ce6
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/66599dea9a43/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/66599dea9a4391eed990a634d789da4393ebe7bd33b8a11aef5aeb2bcd4e620e

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_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
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:Formbook
Create hunting rule
Author:kevoreilly
Description:Formbook Payload
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:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
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

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/31321/

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