MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a. 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 25 File information Comments

SHA256 hash:	65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a
SHA3-384 hash:	a4e85576ec9cd857ed6f12f1a76d93455ca080fd86214e5835d4b66b742bbb7de3d7fee75b901c4086d815ddb02cd3e8
SHA1 hash:	2a238ac254e059c8393b7d22b2ce3bdc0319b690
MD5 hash:	f50cce33f0df73499b5773401b2da317
humanhash:	florida-ohio-quiet-quebec
File name:	2d1ebc58876a03dbf8c42cf167166654747752d66698d66231f1a3ebc8308c59
Download:	download sample
Signature	Formbook Create hunting rule
File size:	1'195'008 bytes
First seen:	2025-12-08 14:31:41 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	0f7552f9514e3a32a8dc8a5a9d9c89a7 (12 x Formbook, 2 x SnakeKeylogger, 1 x a310Logger)
ssdeep	24576:Qtb20pkaCqT5TBWgNjVY2yfJ3BGSGkg5iEK6Fy8z16A:ZVg5tjVY2yJBGSGk5+A8R5
Threatray	2'689 similar samples on MalwareBazaar
TLSH	T16D45D02373DE8361C3B25273BA5AB701AE7B7C2546A5F46B2FD4093DE820162521E773
TrID	50.4% (.EXE) Win32 EXE Yoda's Crypter (26569/9/4) 19.9% (.EXE) Win64 Executable (generic) (10522/11/4) 9.5% (.EXE) Win16 NE executable (generic) (5038/12/1) 8.5% (.EXE) Win32 Executable (generic) (4504/4/1) 3.8% (.EXE) OS/2 Executable (generic) (2029/13)
Magika	pebin
Reporter	abuse_ch
Tags:	exe FormBook upx-dec

abuse_ch

UPX decompressed file, sourced from SHA256 2d1ebc58876a03dbf8c42cf167166654747752d66698d66231f1a3ebc8308c59

UPX unpacked

This file is the unpacked version of a file that has been packed with UPX. Below is furhter information about the parent (compressed) file.

File size (compressed) :	709'632 bytes
File size (de-compressed) :	1'195'008 bytes
Format:	win32/pe
Packed file:	2d1ebc58876a03dbf8c42cf167166654747752d66698d66231f1a3ebc8308c59

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Details

Link:

https://research.acce.ciphertechsolutions.com/results/0a93afd2-4153-4c0f-baeb-9d4cf79311b5/

Malware family:

n/a

ID:

File name:

2d1ebc58876a03dbf8c42cf167166654747752d66698d66231f1a3ebc8308c59

Verdict:

Malicious activity

Analysis date:

2025-12-08 14:46:30 UTC

Tags:

auto-startup

Link:

https://app.any.run/tasks/ea469e4c-9127-4546-9f23-8049a3252823

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

Formbook

Link:

https://www.capesandbox.com/analysis/43036/

Detection(s):

SecuriteInfo.com.PSW.Agent.BORA.UNOFFICIAL

PUA.Win.Packer.Embedpe-3

PUA.Win.Packer.AcprotectUltraprotect-1

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6936e17d881313558a2b8283

Tags:

nymeria autorun autoit emotet

Verdict:

Malicious

Labled as:

AIT:Trojan.Nymeria

Link:

https://www.hybrid-analysis.com/sample/65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-12-08T12:46:00Z UTC

Last seen:

2025-12-08T20:56:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a/results?tab=lookup

Gathering data

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1828851

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

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

Sigma detected: Drops script at startup location

Sigma detected: Rundll32 Execution Without CommandLine Parameters

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)

Unusual module load detection (module proxying)

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

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a

Verdict:

Malware

YARA:

7 match(es)

Tags:

AutoIt Decompiled Executable PE (Portable Executable) PE File Layout Suspect Win 32 Exe x86

Link:

https://app.malva.re/file/f50cce33f0df73499b5773401b2da317

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a/

Threat name:

Win32.Trojan.AutoitInject

Status:

Malicious

First seen:

2025-12-08 14:32:26 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

29 of 38 (76.32%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=mx4ggty44axctivljs7xegklpbnz7fcthqbebstzwan3ybdjxqfa._file

Verdict:

malicious

Label(s):

autoit

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook discovery rat spyware stealer trojan

Link:

https://tria.ge/reports/251208-rwfgvscr2x/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Program crash

System Location Discovery: System Language Discovery

AutoIT Executable

Suspicious use of SetThreadContext

Drops startup file

Executes dropped EXE

Formbook payload

Formbook

Formbook family

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/a53c0dab-0ffa-462f-9680-2336a645d1c9

Unpacked files

SH256 hash:

beb083916c0287752dc4823c0cea4b443b7e710587159ed6dd07592b12d743dd

MD5 hash:

4c4d1a12304ba2cb73a4ce110e695c25

SHA1 hash:

5638d057170c35e15dac32f2fbe700d6157794b3

Detections:

win_formbook_g0

Link:

https://www.unpac.me/results/54b910df-0056-48d3-bddb-7f1f11f4c42a/

Parent samples :
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SH256 hash:

8cc9dc2e10902f45f7c98f1c365871795f0a6f3f44fafab82c68e1725b9d39eb

MD5 hash:

a5ca2815e7f0d0bb95b5f18c56c454a2

SHA1 hash:

88e63051d922be0a64d0538adcdf20db3b5633d1

Link:

https://www.unpac.me/results/54b910df-0056-48d3-bddb-7f1f11f4c42a/

SH256 hash:

65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a

MD5 hash:

f50cce33f0df73499b5773401b2da317

SHA1 hash:

2a238ac254e059c8393b7d22b2ce3bdc0319b690

Link:

https://www.unpac.me/results/54b910df-0056-48d3-bddb-7f1f11f4c42a/

Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/65f8634f1ce0/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/65f8634f1ce02e29a2ab4cbf72194b785b9f94533c0240ca79b01bbc0469bc0a

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:	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__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:	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:	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:	TH_Generic_MassHunt_Win_Malware_2025_CYFARE Create hunting rule
Author:	CYFARE
Description:	Generic Windows malware mass-hunt rule - 2025
Reference:	https://cyfare.net/

Rule name:	TH_Win_ETW_Bypass_2025_CYFARE Create hunting rule
Author:	CYFARE
Description:	Windows ETW Bypass Detection Rule - 2025
Reference:	https://cyfare.net/