MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23. 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 4 File information Comments

SHA256 hash:	3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23
SHA3-384 hash:	67e4e944e9bc0499dd63cef63214f5416abaa3cea3f53d68363b4eaf50fca7b5b2e0d91bfb167dc5444d46d052a3f247
SHA1 hash:	d19e11692605f70504de8ab04a992627985facea
MD5 hash:	8379ff838164b21dbd287611dae13ecb
humanhash:	speaker-mississippi-johnny-princess
File name:	Debit note Jan-Jul 2024.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	757'760 bytes
First seen:	2024-08-23 01:58:30 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	21371b611d91188d602926b15db6bd48 (61 x Formbook, 23 x AgentTesla, 20 x RemcosRAT)
ssdeep	12288:osHzOUNUSB/o5LsI1uwajJ5yvv1l2/BXyZPlcd2zhRKzdWTWTKgYzajbRtML7RQH:7iUmSB/o5d1ubcvKC5lcd2WUg3RquUjs
Threatray	2'946 similar samples on MalwareBazaar
TLSH	T1ABF423528AC2C46AE261637C94324EE582917E70CEC53FABC755F3AE18343C6C51B79E
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):
dhash icon	aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter	koluke
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

410

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Debit note Jan-Jul 2024.exe

Verdict:

No threats detected

Analysis date:

2024-08-23 02:01:31 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/a03444dc-21ce-480f-b493-389cc20e59d4

Note:

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

Detection(s):

SecuriteInfo.com.Trojan.Win32.AgentTesla.13683.23123.UNOFFICIAL

Verdict:

Malicious

Score:

99.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=66c7ece8b2a4681a72967f0d

Tags:

Stealth Trojan

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:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

autoit lolbin microsoft_visual_cc packed packed packed shell32 upx

Link:

https://www.filescan.io/uploads/66c7ece87cae46ead5e730cf/reports/389350fe-115c-4701-b12d-95ff10db4f44/overview

Verdict:

Malicious

Labled as:

Strictor.Generic

Link:

https://www.hybrid-analysis.com/sample/3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23

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.

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/ad329299-0eec-40e8-a19d-7baced33b5a1

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1497798

Signature

AI detected suspicious sample

Binary is likely a compiled AutoIt script file

Drops VBS files to the startup folder

Found API chain indicative of sandbox detection

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: Drops script at startup location

Sigma detected: WScript or CScript Dropper

Switches to a custom stack to bypass stack traces

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/3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23/

Threat name:

Win32.Trojan.Strictor

Status:

Malicious

First seen:

2024-08-22 23:57:40 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

14 of 38 (36.84%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=gztjsg5jwgykwm4pihbxyc76hkfob67332mcaz42oy3cuyikbmrq._file

Verdict:

malicious

Formbook

19d32b052f1bd0acea48d155c946166c6ed7f426d1bc2ed373b880a28e0e4fd7

Formbook

2198db5427b201f1579dff76d5bdd7d64f844a9d4dc3850738d6b4b1ba63caf2

Formbook

2dea6029205d48a89ccf2d373732a907328c38ea42d94244341d8c7b7b145a0b

Formbook

55d1417ff4ce962cc1b20755fe5383135f69b1d5e7aebfa50b025af27cb7a5ce

Formbook

593d4af1922cf7edf2908ba830fc3ba4cdcf51fc0233fe72783cd836243fbecf

Formbook

6bfb0f467d70e67c4d5406c39a7b4ce5ce0b81b0c8318d51a078b77bddcdd275

Formbook

8b7381ea399084b6999397672ad8557e74ceb6f735566143f2ea344be4d83ea5

Formbook

d6e12ca72ee501a41c85d8aeee6ee15bd6f203622a3fd875996bebb4115fb404

Formbook

+ 2'936 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

7/10

Tags:

discovery upx

Link:

https://tria.ge/reports/240823-ced55szblb/

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

Drops startup file

Executes dropped EXE

Loads dropped DLL

UPX packed file

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/d798c4c1-6671-497c-b52d-2f9e933fb2fa

Unpacked files

SH256 hash:

a733c718bc86efb4dd0bc2f6003442637844451bbcf516ba0347300751ca672e

MD5 hash:

c7a95d6083a747e77534fe4d3a834e43

SHA1 hash:

ec7c51b46c3e2e3cfe8d5caaf5f5169c4cdca4a2

Detections:

win_formbook_g0

win_formbook_w0

Link:

https://www.unpac.me/results/73a51d0f-db5d-4e14-b881-cbf7a5642876/

Parent samples :

593d4af1922cf7edf2908ba830fc3ba4cdcf51fc0233fe72783cd836243fbecf
2b2814cc30915dd6022bf80353b6e37bdabd379c351fd2e201cd3ee53621b147
3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23
d662f78e5e0c62cdc866836476cc59a0f26edd95d9e14fd2f246792c39f44096
17a478564c4eb41b217ae131ab1b433278bb60bd0d4b0f876f602d71336abae3
3fe4c784dfb841053360622561788dacfc8e4b81567bc461e4cd33e61d2d1e64
e38d7e764bae9be6ef464c001dc3784c28d165bff06c390ef600d785ec1871c1

SH256 hash:

b56ca9d855c924787ee2fc975458503b38c2cdc2990386bc1aba61372ba4a5f0

MD5 hash:

70b61828deeb6bc00745fe9f4d283437

SHA1 hash:

f2fb66e2c0311841603dbf3220a11ea4b84a8ea1

Link:

https://www.unpac.me/results/73a51d0f-db5d-4e14-b881-cbf7a5642876/

SH256 hash:

dc35d9013fbcc1484125cf12dcfcd01a4788f7af0adba5a6e248534f05232961

MD5 hash:

7ef52ae2851a581aefe4ab5eb1b8596a

SHA1 hash:

a6ede59385afd509918f1eab3d623341af430736

Detections:

AutoIT_Compiled

Link:

https://www.unpac.me/results/73a51d0f-db5d-4e14-b881-cbf7a5642876/

SH256 hash:

3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23

MD5 hash:

8379ff838164b21dbd287611dae13ecb

SHA1 hash:

d19e11692605f70504de8ab04a992627985facea

Link:

https://www.unpac.me/results/73a51d0f-db5d-4e14-b881-cbf7a5642876/

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/3666991ba9b1/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/3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23

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:	pe_detect_tls_callbacks Create hunting rule

Rule name:	UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser Create hunting rule
Author:	malware-lu

Rule name:	upx_largefile Create hunting rule
Author:	k3nr9

File information

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

Malspam

Formbook

exe 3666991ba9b1b0ab338f41c37c0bfe3a8ae0fbfbde9820679a76362a610a0b23

(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

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high
CHECK_NX	Missing Non-Executable Memory Protection	critical

Reviews

ID	Capabilities	Evidence
AUTH_API	Manipulates User Authorization	ADVAPI32.dll::GetAce
MULTIMEDIA_API	Can Play Multimedia	WINMM.dll::timeGetTime
WIN_BASE_API	Uses Win Base API	KERNEL32.DLL::LoadLibraryA

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