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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384
SHA3-384 hash: 7e790ac20f9792ca6f825820f09626eb6b3eb5fb6c3ab279de47dcd3f977e769bc04128c4b62bca29420d691db4a9ccd
SHA1 hash: a0d606a34b035856ba9d2950a962f6f143be8b4a
MD5 hash: d6d231259254992a8c8958cc4e6aa1fc
humanhash: johnny-sixteen-uranus-tennis
File name:66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384
Download: download sample
Signature Formbook
Create hunting rule
File size:1'166'336 bytes
First seen:2026-09-04 20:36:02 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'218 x AgentTesla, 20'417 x Formbook, 12'370 x SnakeKeylogger)
ssdeep 24576://eA9sVfEgkYgnQdAQw2VyVXzAyDctK6FLvF17DzSuQPX9eZ:uUsVfwY/dAQtVQXzAScNFLd1rfQPNe
TLSH T1154502847A0AC903DD954BB80E72FAB8176C1D9EE911E34A5FE97DEB7676F008C04643
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 e0e2aba3a5b8b8a8 (60 x AgentTesla, 22 x Formbook, 18 x SnakeKeylogger)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
150
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/7a493aa9-e234-43c0-8862-8d9432bb39f6/
Malware family:
formbook
Create hunting rule
ID:
1
File name:
exe
Verdict:
Suspicious activity
Analysis date:
2026-09-04 23:00:05 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/0b81376b-823f-403b-a1be-faaaeadeffe9

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/84090/
Detection(s):
Win.Trojan.Spynoon-9939401-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a service
Сreating synchronization primitives
Creating a process with a hidden window
Launching a process
Creating a file
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
entropy formbook krypt obfuscated packed stealer
Link:
https://www.filescan.io/uploads/6a9b2bbffcf8ac3ee6d1df6d/reports/5dab183a-db5f-47ae-bff5-fcbd9d579aa9/overview
Verdict:
Malicious
Labled as:
Trojan.Formbook
Link:
https://www.hybrid-analysis.com/sample/66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-08-13T13:59:00Z UTC
Last seen:
2026-08-13T14:57:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1357dfc0-83ea-4d4c-be87-a8b6029a18ea
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.49 Win 32 Exe x86
Link:
https://app.malva.re/file/d6d231259254992a8c8958cc4e6aa1fc
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2026-08-14 04:29:19 UTC
File Type:
PE (.Net Exe)
Extracted files:
26
AV detection:
27 of 36 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=m3gm667xthnmdthmtziskbrugelo2bgu47ihnaqdax67zkqg6oca._file
Verdict:
malicious
Label(s):
Formbook
Create hunting rule
Link:
https://reports.threatray.com/af12455a-003f-4eec-9c6c-ed14c4d39fd1
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260904-zdqh4shp9y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
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:
66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384
MD5 hash:
d6d231259254992a8c8958cc4e6aa1fc
SHA1 hash:
a0d606a34b035856ba9d2950a962f6f143be8b4a
Link:
https://www.unpac.me/results/501e3239-00c5-4b2a-a7d5-7174ee1513bb/
SH256 hash:
6d4c5bc731b2e23fa90f0d8e916c17f57c4bf3d38278b1d02bb560cb19b85091
MD5 hash:
cd2fd8822f142d3a5f9d51f58967a218
SHA1 hash:
7d83a73965e5cdba3ecf738e3794804d3c98f8c0
Link:
https://www.unpac.me/results/501e3239-00c5-4b2a-a7d5-7174ee1513bb/
SH256 hash:
d70edaa02c2e25e201462babb14f3f92071acd982e7f56ad8eac552b1498be49
MD5 hash:
e8d90a524b9aca0e6ce3373e0d308282
SHA1 hash:
bf0f20b7a3226b0e35f670267b4b94e3d5f4fc36
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/501e3239-00c5-4b2a-a7d5-7174ee1513bb/
SH256 hash:
0a1a1a6d2ee888e2d306ab8a1ada674266889ff9a657632a300acf65407b5720
MD5 hash:
9b322fa58042b5e0710b6173f9908683
SHA1 hash:
cbb4ef2f8381844fbb82b45392480e1c9c1f4e48
Link:
https://www.unpac.me/results/501e3239-00c5-4b2a-a7d5-7174ee1513bb/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/66cccf7bf799/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/66cccf7bf799dac1ccec9e512506343116ed04d4e7d076820305fdfcaa06f384

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/84090/

Comments