MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd. 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 25 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd
SHA3-384 hash: c999fa9a502fe981f8a1abfec7c1dfa63044b826fec52614c445a862f79b079690a84f6e3d9d7b783ed5a5ed18c1ae7f
SHA1 hash: 2cae375f93ceddca69e1f3b86669da5d1d6866e3
MD5 hash: 8622a2945b38dc8a5f2d72d59a936729
humanhash: iowa-fifteen-juliet-two
File name:4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd
Download: download sample
Signature Formbook
Create hunting rule
File size:1'093'120 bytes
First seen:2026-08-10 13:26:09 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:a1B68MwCXZCapX0NAUGd/qfHP2sAHUF0txyKv1:akwCJZd0Bi/sHPJA0FPKv
TLSH T1CC3512C03739B71ADE601931A635EDB542FA1EA87001FAE25DDD7B8B79AE2119D0CF01
TrID 70.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.2% (.EXE) Win64 Executable (generic) (6522/11/2)
4.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon 08786464d8d060a8 (5 x Formbook, 1 x RemcosRAT, 1 x AgentTesla)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
62
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/aa0a7c25-7ea4-4b8b-8972-588e33bb5cc8/
Malware family:
n/a
ID:
1
File name:
25341018326.zip
Verdict:
Suspicious activity
Analysis date:
2026-06-29 13:30:42 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/7317cc43-45f4-40d5-a2e4-6c799faa948e

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/79498/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
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
Link:
https://www.filescan.io/uploads/6a79d18769834dc6806946fe/reports/62392d40-d2c4-4578-97a7-d594c9e98ad5/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-06-28T23:45:00Z UTC
Last seen:
2026-08-06T18:23:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/880df90f-8725-44ac-89cf-3e6a68d7d967
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd/
Threat name:
ByteCode-MSIL.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2026-06-29 02:43:26 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
25 of 36 (69.44%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ji32sohfxml4hnlvikhc5giw5zn2waxy5k4rykmlx66ar5sgdhgq._file
Verdict:
malicious
Label(s):
Formbook
Create hunting rule
Link:
https://reports.threatray.com/c9391a05-bd37-4241-ba54-89584b0102b1
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260810-qrbsfavvcx/
Behaviour
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
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:
4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd
MD5 hash:
8622a2945b38dc8a5f2d72d59a936729
SHA1 hash:
2cae375f93ceddca69e1f3b86669da5d1d6866e3
Link:
https://www.unpac.me/results/7d30e52d-f425-490e-9cbd-7a0ae5233547/
SH256 hash:
3f53c9b7b3d9655bef339d9107865ea1dbe4ca60d7299be6f9794a167800325c
MD5 hash:
ceb195dd3cfbd4b8c8167604c06cda75
SHA1 hash:
8d26735771bb5b23111e00e0c7f6072a7564e473
Link:
https://www.unpac.me/results/7d30e52d-f425-490e-9cbd-7a0ae5233547/
SH256 hash:
5d96847491540476d6e0d15e1db7bdcaf94d414104d997b84901b92d289e6153
MD5 hash:
f7b3a2ade6cdad279f03ffa1a4a9f0c7
SHA1 hash:
f297a3bec21d1c44977bdd1853c03f6edefba25f
Link:
https://www.unpac.me/results/7d30e52d-f425-490e-9cbd-7a0ae5233547/
SH256 hash:
3edb94ce514b8a4ea5b9dde5b135c31231150a8183717398aa7d7c7b336bcd5a
MD5 hash:
1b2e788c7ad0c4957a455bdaa797918a
SHA1 hash:
f14c661b4cade18f50296177a6c9c6787a5abc5b
Link:
https://www.unpac.me/results/7d30e52d-f425-490e-9cbd-7a0ae5233547/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4a37a938e5bb/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/4a37a938e5bb17c3b575428e2e9916ee5bab02f8eab91c298bbfbc08f64619cd

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/79498/

Comments