MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4
SHA3-384 hash: ac82e5a0e2bd935c98e618746c02856345cb83d9408402c43216d31e0e6f47c7cee49f1723059bbbf1cc60a29b245764
SHA1 hash: 5ebcb6368e30459bbd3f516879490a1fc07c3ef1
MD5 hash: 1871f69b093e11e63f750608e5b21cdb
humanhash: fish-paris-network-april
File name:TRANSMAN #5774 OUT 61930 DD. 18-3-25, USD 51.121,60..exe
Download: download sample
Signature Formbook
Create hunting rule
File size:772'608 bytes
First seen:2025-03-18 23:29:19 UTC
Last seen:2025-03-20 11:52:44 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 12288:dNPINJqFew5RD5AA/wKmVyABxFLaihQZtz1tgjrE+c8hq83nEpBd2Ia7B:dNPvFewTD5n/wKM/LagQPHaC8
Threatray 48 similar samples on MalwareBazaar
TLSH T134F4F1AC3244F9AFC8078A328A25DE70A6506C7ED70BD303A1DB5DEF790D5968E151F2
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon 886443434b83cbe2 (17 x AgentTesla, 7 x Formbook, 4 x SnakeKeylogger)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
5
# of downloads :
444
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
TRANSMAN #5774 OUT 61930 DD. 18-3-25, USD 51.121,60..exe
Verdict:
No threats detected
Analysis date:
2025-03-18 23:31:00 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/859f7985-b7f0-4b3e-b54d-393cf3b958c2

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67da0d93194f23322a70f086
Tags:
virus msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/67da020cd2c4beeae927cb55/reports/5c27c91e-5d77-45f1-9a71-14f2dde3215c/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/d9e14aa3-fd7a-4291-8717-9f3c990f0466
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1642223
Signature
.NET source code contains potential unpacker
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found direct / indirect Syscall (likely to bypass EDR)
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1642223 Sample: TRANSMAN #5774 OUT 61930 DD... Startdate: 19/03/2025 Architecture: WINDOWS Score: 100 30 www.seekmeme.xyz 2->30 32 www.persembunyian.xyz 2->32 34 3 other IPs or domains 2->34 40 Suricata IDS alerts for network traffic 2->40 42 Multi AV Scanner detection for submitted file 2->42 44 Detected unpacking (changes PE section rights) 2->44 48 5 other signatures 2->48 10 TRANSMAN #5774 OUT 61930 DD. 18-3-25, USD 51.121,60..exe 3 2->10         started        signatures3 46 Performs DNS queries to domains with low reputation 32->46 process4 file5 28 TRANSMAN #5774 OUT... 51.121,60..exe.log, ASCII 10->28 dropped 13 TRANSMAN #5774 OUT 61930 DD. 18-3-25, USD 51.121,60..exe 10->13         started        process6 signatures7 60 Maps a DLL or memory area into another process 13->60 16 4ESLwydZ7.exe 13->16 injected process8 signatures9 38 Found direct / indirect Syscall (likely to bypass EDR) 16->38 19 dxdiag.exe 13 16->19         started        process10 signatures11 50 Tries to steal Mail credentials (via file / registry access) 19->50 52 Tries to harvest and steal browser information (history, passwords, etc) 19->52 54 Modifies the context of a thread in another process (thread injection) 19->54 56 3 other signatures 19->56 22 4ESLwydZ7.exe 19->22 injected 26 firefox.exe 19->26         started        process12 dnsIp13 36 www.myfort.xyz 13.248.169.48, 49725, 49727, 49728 AMAZON-02US United States 22->36 58 Found direct / indirect Syscall (likely to bypass EDR) 22->58 signatures14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-03-18 17:06:21 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
26 of 38 (68.42%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mzsmgvltsgujq2b5c4z2hbyy4eioljfvdwcv7orbyfgkuqdyrw2a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unc_loader_037
Create hunting rule
Similar samples:
31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd
Formbook
6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4
Formbook
730dcaa50239c82c3d920f812bcad23a638a09c783479097291f8a6d9bca07a7
Formbook
799e2a0426beeafc490746851d8992cd169ed89c3d4244459f531a9f4fa72375
Formbook
error
Formbook
+ 38 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/250318-3g6ahstks5/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/51b2d9ae-e585-4bbd-b147-0b794312e1a6
Unpacked files
SH256 hash:
6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4
MD5 hash:
1871f69b093e11e63f750608e5b21cdb
SHA1 hash:
5ebcb6368e30459bbd3f516879490a1fc07c3ef1
Link:
https://www.unpac.me/results/5c08ad4d-9cf0-4b7c-9ebd-a171d1893d86/
SH256 hash:
094a2002272a6a5c1a719550f4ce12f25f397689796f090ad26991cf60698c46
MD5 hash:
a92790e0ffd6d83c3e036197e9eb7092
SHA1 hash:
192c8ab285101b240de22931e4fc96907f134c99
Link:
https://www.unpac.me/results/5c08ad4d-9cf0-4b7c-9ebd-a171d1893d86/
SH256 hash:
2663d383518d3e798a0e17e8e095ae1c34eb476f4fb4b703717e994c5ff00789
MD5 hash:
7c1ea1a7545b5dd6a6615ff4db9de33e
SHA1 hash:
b42993bb77267ae9211765b6efbf2cebcd45d1f5
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/5c08ad4d-9cf0-4b7c-9ebd-a171d1893d86/
SH256 hash:
51ea9157b7cae4cdee16d6007e949dfdf833de7715f4b0bfbdd91b9cd1b5a82a
MD5 hash:
87b522966f156f38d9ff9fb09fe89ce2
SHA1 hash:
e0cf3a26b03e8affa99961cf95e9d5342cc5f98c
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/5c08ad4d-9cf0-4b7c-9ebd-a171d1893d86/
Parent samples :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 hash:
07f88615ed5514874bd1f079e2ca8f9b2d0d84d95977d6e5b868c2ade2e6b349
MD5 hash:
f1b2869f7ec51a2631bcf7febb94d7cc
SHA1 hash:
efed8182570e779716d1cef7242edfff594841f5
Link:
https://www.unpac.me/results/5c08ad4d-9cf0-4b7c-9ebd-a171d1893d86/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/6664c3557391/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4

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: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.

Malspam

Formbook

Executable exe 6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4

(this sample)

  
Delivery method
Distributed via e-mail attachment

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 (GUARD_CF)high

Comments