MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b. 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: 14


Intelligence 14 IOCs YARA 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b
SHA3-384 hash: 9d07d37da4400c4ae6054006a2fd39cfc48d3d30dad163f50359560e15d779a6947bd57d08a39fa949de29579a44a700
SHA1 hash: fb9643f1f00e03d68cc8ffec07b8402d4ac26949
MD5 hash: 1cab40bf812c8c5d5e29f6a8023d1d11
humanhash: muppet-oscar-friend-single
File name:8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b
Download: download sample
Signature Formbook
Create hunting rule
File size:711'680 bytes
First seen:2025-03-10 11:17:25 UTC
Last seen:2025-04-08 07:16:49 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash ef471c0edf1877cd5a881a6a8bf647b9 (74 x Formbook, 33 x Loki, 29 x Loda)
ssdeep 12288:sOv5jKhsfoPA+yeVKUCUxP4C902bdRtJJPi6OQaKGy3FIjfnVX/PjP2e7OVO5BuN:sq5TfcdHj4fmbzwy3GzVX3dmN
TLSH T1D4E4234036A8CDB5E6603331C07FCEA11679BA31CC5A672D6796E15E7872323ADC663C
TrID 39.1% (.EXE) UPX compressed Win32 Executable (27066/9/6)
38.3% (.EXE) Win32 EXE Yoda's Crypter (26569/9/4)
7.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.5% (.EXE) Win32 Executable (generic) (4504/4/1)
2.9% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
File icon (PE):PE icon
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
335
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b
Verdict:
Suspicious activity
Analysis date:
2025-03-10 12:06:24 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/8abe366f-d02b-4719-a41a-c2ad35477b38

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67ced06b1f777fe306089462
Tags:
autorun autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a file
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-debug autoit cmd compiled-script cscript hacktool lolbin microsoft_visual_cc mpcmdrun packed packed packed packer_detected rasautou upx wuauclt
Link:
https://www.filescan.io/uploads/67ceca7d4a3011c802cc1b91/reports/1540e910-cdc0-4c1d-b7c1-77ce69ca2764/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b
Result
Verdict:
MALICIOUS
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/84d96f80-0139-4806-a7b9-86a55f56598a
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1633528
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Drops VBS files to the startup folder
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Sigma detected: Drops script at startup location
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1633528 Sample: GzvFF0LziH.exe Startdate: 10/03/2025 Architecture: WINDOWS Score: 100 41 www.mostbetv1.xyz 2->41 43 www.justachillaiguy.xyz 2->43 45 21 other IPs or domains 2->45 75 Suricata IDS alerts for network traffic 2->75 77 Antivirus detection for URL or domain 2->77 79 Antivirus / Scanner detection for submitted sample 2->79 83 6 other signatures 2->83 11 GzvFF0LziH.exe 4 2->11         started        15 wscript.exe 1 2->15         started        signatures3 81 Performs DNS queries to domains with low reputation 43->81 process4 file5 39 C:\Users\user\AppData\...\subbasaltic.exe, PE32 11->39 dropped 87 Binary is likely a compiled AutoIt script file 11->87 89 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 11->89 17 subbasaltic.exe 2 11->17         started        91 Windows Scripting host queries suspicious COM object (likely to drop second stage) 15->91 21 subbasaltic.exe 1 15->21         started        signatures6 process7 file8 37 C:\Users\user\AppData\...\subbasaltic.vbs, data 17->37 dropped 61 Antivirus detection for dropped file 17->61 63 Multi AV Scanner detection for dropped file 17->63 65 Binary is likely a compiled AutoIt script file 17->65 73 2 other signatures 17->73 23 svchost.exe 17->23         started        67 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 21->67 69 Writes to foreign memory regions 21->69 71 Maps a DLL or memory area into another process 21->71 26 svchost.exe 21->26         started        signatures9 process10 signatures11 85 Maps a DLL or memory area into another process 23->85 28 72zsWPpn9wPaIhRnv.exe 23->28 injected process12 dnsIp13 47 justachillaiguy.xyz 84.32.84.32, 49763, 49764, 49765 NTT-LT-ASLT Lithuania 28->47 49 www.actoint.xyz 209.74.77.107, 49743, 49744, 49745 MULTIBAND-NEWHOPEUS United States 28->49 51 7 other IPs or domains 28->51 93 Found direct / indirect Syscall (likely to bypass EDR) 28->93 32 winrs.exe 13 28->32         started        signatures14 process15 signatures16 53 Tries to steal Mail credentials (via file / registry access) 32->53 55 Tries to harvest and steal browser information (history, passwords, etc) 32->55 57 Modifies the context of a thread in another process (thread injection) 32->57 59 2 other signatures 32->59 35 firefox.exe 32->35         started        process17
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-02-20 12:12:35 UTC
File Type:
PE (Exe)
Extracted files:
51
AV detection:
30 of 38 (78.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=q434ge2mbbc7jjvsog3tlgdix67erlzhfeqdygzxzbdjtfpwb2fq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery upx
Link:
https://tria.ge/reports/250310-nec4masxe1/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
AutoIT Executable
Suspicious use of SetThreadContext
UPX packed file
Drops startup file
Executes dropped EXE
Loads dropped DLL
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/7958a068-aece-4450-a652-2dbc6c49954f
Unpacked files
SH256 hash:
8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b
MD5 hash:
1cab40bf812c8c5d5e29f6a8023d1d11
SHA1 hash:
fb9643f1f00e03d68cc8ffec07b8402d4ac26949
Link:
https://www.unpac.me/results/8be2ddf2-b0fc-43ac-a379-b3f83acae3dc/
SH256 hash:
e5f806104b1066530cbb2d0bc56c52a36f7145232851bda99d47da98396db443
MD5 hash:
255f4f5813ba266ef0237704f90632ff
SHA1 hash:
8871d09854a026f4a001a3f365e46eac1c89c423
Link:
https://www.unpac.me/results/8be2ddf2-b0fc-43ac-a379-b3f83acae3dc/
SH256 hash:
e42b90db6ef73814fcf4d281d5793fc23d2b6843ce9e103b6e4c8784e162d8ae
MD5 hash:
ab22a7923eeea5992965afebf5442070
SHA1 hash:
4248c25c8ddc40c883b7739fbf97491ddb86ed9a
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/8be2ddf2-b0fc-43ac-a379-b3f83acae3dc/
Parent samples :
45088c3a74169ca81fe0ee21ff602bd352349d43436a70aaab88e93cc8f5fcda
3d1701e167eb96e3954192b0558be7a9bb6579216bdaa5f7d79c8680689e89a2
8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b
0c26801afb1b00b64ae51e6460d69c6d39a55abe7086cc40a0b4390ac3fae5ae
SH256 hash:
5a5a23fe534486c6a61ff363a810b89ef97a76128390accea73b15e2bd6642c0
MD5 hash:
521036c54f0e0119899ed6fb131812a2
SHA1 hash:
1a5e81991b484be5841e3ad30afedff9649207cb
Detections:
AutoIT_Compiled
Create hunting rule
Link:
https://www.unpac.me/results/8be2ddf2-b0fc-43ac-a379-b3f83acae3dc/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/8737c3134c08/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/8737c3134c0845f4a6b271b7359868bfbe48af2729203c1b37c8469995f60e8b

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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: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: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: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)
Rule name:UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser
Create hunting rule
Author:malware-lu
Rule name:upx_largefile
Create hunting rule
Author:k3nr9
Rule name:YahLover
Create hunting rule
Author:Kevin Falcoz
Description:YahLover

File information

The table below shows additional information about this malware sample such as delivery method and external references.

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_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
MULTIMEDIA_APICan Play MultimediaWINMM.dll::timeGetTime
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AddAce
WIN_BASE_APIUses Win Base APIKERNEL32.DLL::LoadLibraryA
WIN_NETWORK_APISupports Windows NetworkingMPR.dll::WNetUseConnectionW

Comments