MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5
SHA3-384 hash: 45e184b1b3f2ee1e4d3b875d1f6fb6413d47b954241458629a836cb2718fd5c9d7c0160364d448703dc0773a25352167
SHA1 hash: 01483b47d9e8e60ea2d8c9e94c18e48552fdb50a
MD5 hash: 0aa1c1b03588e28920c93aa88e4f0978
humanhash: lithium-october-uniform-ceiling
File name:a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5
Download: download sample
Signature Formbook
Create hunting rule
File size:748'032 bytes
First seen:2025-07-07 14:18:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 12288:dxVbMiNgvmjmtE4I48TMB+V5gyyD5Br2RoeStcewYnAcPTLq8ZaQDpuo96IxtqEj:dxVb6JI48TmnBCO/pnAOTLqY5uo9vx8C
TLSH T14FF4126163A7E902D8EA5BF405E0D2760271AFCDE523D34F69DCACDB78123E529843D2
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 :
18
Origin country :
HU HU
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/12834/
Verdict:
Malicious
Score:
95.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=686bd786900df8e7f868409d
Tags:
crysan virus msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3afd7c69-c934-4f13-8558-5464af948e26
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2025-06-19 16:26:41 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
25 of 36 (69.44%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=va7tihejimcqxqcb7tb2fftgjxtk63uneyczb7s4ebshappcm32q._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250707-rm5emav1bx/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c67149a5-266a-469e-b7fe-8b9d0f304004
Unpacked files
SH256 hash:
a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5
MD5 hash:
0aa1c1b03588e28920c93aa88e4f0978
SHA1 hash:
01483b47d9e8e60ea2d8c9e94c18e48552fdb50a
Link:
https://www.unpac.me/results/0efb9824-2782-4ebc-8ced-eb87cd9c0f52/
SH256 hash:
c3a1b2a1097cbcd1893a88ded8923b99f14fd7cd77fe36eae235f69f1a5d72a9
MD5 hash:
d2d647dac3c36c861876efdc4778a62b
SHA1 hash:
29441e77bb05fb039fc126fb1eb0ffe9838bdbbe
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/0efb9824-2782-4ebc-8ced-eb87cd9c0f52/
Parent samples :
a2de3ca55b66d8eb4e1968d8b94fefe030bf6ba5a887817877c8c6e6b4246bcd
a83f341c8943050bc041fcc3a296664de6af6e8d260590fe5c2064703de266f5
f2fe8f1407a521f600d14b437640224c73ab0e616f5a0ce419b9f0c0c9076dc6
2e2ee0c818f731f57404e72ade9a15fa87afd609085a357afe30bbd4618a627c
34fc69023eb0009b5cd2f6f43b3677a4bf6a6677e08b2d90a8021aeae4c9c80b
b782aabf9cd513691eb4b496e8d22b7f3224bf69286c7c4df7f0d29bc3a667f6
ddb4d0771b710a59722707002a175602f29c6d1aeab70c61e0e9dc3eeeade55e
6e94a0e6947816d2b2665261d03687481cf1f05d99613965da35de05ae4b4a6f
7da39043cc5b341803dc055cb2f6fbfa723323614daca14a3e55684792c9cf20
SH256 hash:
28a03cd263bb2d2c778a7a62b286069a48da03e2ba940f0119bb5e39fc4315e5
MD5 hash:
d2eb0f2c5e8f9189a33f64de6ff3dd23
SHA1 hash:
3b11e995b123a26d1ec6b76befbc023384149b56
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/0efb9824-2782-4ebc-8ced-eb87cd9c0f52/
SH256 hash:
a5c0006918a2d8df2f655b5dce6edee5c8ac336010fad6fe0d8cb17be6aecc1c
MD5 hash:
c93f82cd577fe45d220533947f0785cd
SHA1 hash:
3dbad7da0b630e878fb83b0706eba6ed0779e48c
Link:
https://www.unpac.me/results/0efb9824-2782-4ebc-8ced-eb87cd9c0f52/
SH256 hash:
6bf2f72f8be53bb7bfb010839a1c12ef05c643854a5ea525c044805c7af3b513
MD5 hash:
1c29d69b41b303c75b2f85cbf873627d
SHA1 hash:
d8bfd74803f0ebcb53f6bdea5afa5c95915d4134
Link:
https://www.unpac.me/results/0efb9824-2782-4ebc-8ced-eb87cd9c0f52/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:pe_imphash
Create hunting rule
Rule name:Runtime_Broker_Variant_1
Create hunting rule
Author:Sn0wFr0$t
Description:Detecting malicious Runtime Broker
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

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/12834/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
CHECK_TRUST_INFORequires Elevated Execution (Unrestricted:true)high

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