MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1. 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 20 File information Comments

SHA256 hash:	81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1
SHA3-384 hash:	8dcdffbf0ae27de1cd0a51095ed492d8c0e42d039718946094c970a33a3b9c07830423074bfbcd7ab05eeef9f732451e
SHA1 hash:	3cfff1e1e7dd6a71ab5998824a445ec1f2a1037c
MD5 hash:	646d8eec77ad22f3736542618cca0039
humanhash:	mars-berlin-johnny-carpet
File name:	RE.Documents Purchase Order products 23100290683v pdf.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	549'376 bytes
First seen:	2023-11-02 09:42:10 UTC
Last seen:	2023-11-02 13:09:19 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep	12288:sGpcNvgd+bvGA7/+ZvoCStM4ETYtOIvAMWBCFsALl66yY:sGSYdjXgtMb8tO+7Ll6g
Threatray	187 similar samples on MalwareBazaar
TLSH	T1D6C4234137E4AB5FC85E0978288BC9C7072BF46E7FF2DB092C83416C6647E67AD04699
TrID	63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 11.2% (.SCR) Windows screen saver (13097/50/3) 9.0% (.EXE) Win64 Executable (generic) (10523/12/4) 5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 3.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):
dhash icon	38147262d6cca422 (9 x AgentTesla, 2 x Formbook, 1 x Loki)
Reporter	cocaman
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

322

Origin country :

Vendor Threat Intelligence

Detection:

Formbook

Link:

https://www.capesandbox.com/analysis/457759/

Detection(s):

Porcupine.Malware.58887.UNOFFICIAL

SecuriteInfo.com.Win32.TrojanX-gen.2190.25121.UNOFFICIAL

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

Launching a process

Сreating synchronization primitives

Launching cmd.exe command interpreter

Setting browser functions hooks

Unauthorized injection to a system process

Unauthorized injection to a browser process

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

masquerade packed

Link:

https://www.filescan.io/uploads/65436f272e754890e4803e08/reports/ad082188-3ee3-4340-b4a8-6919b572fb51/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1

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:

Formbook

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/877738a2-d9f4-4e32-ae3a-b0352828215c

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1335896

Signature

.NET source code contains potential unpacker

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Found malware configuration

Initial sample is a PE file and has a suspicious name

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Tries to detect virtualization through RDTSC time measurements

Yara detected FormBook

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1

Detection:

formbook

Link:

https://mwdb.cert.pl/sample/81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1/

Threat name:

ByteCode-MSIL.Trojan.AgentTesla

Status:

Malicious

First seen:

2023-11-02 05:54:51 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

19 of 24 (79.17%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=qh3iagiqstfcjf6hpgftpobqbekxu4qb3qhspa44fbqnl24wr7iq._file

Verdict:

malicious

Label(s):

formbook

Formbook

32290d3a44ccd56a41469cda2bd09d79dde405d398b76705c0de70faede87bc1

Formbook

93bc82b99ec0339576f7f93e026ee2dc33b8bdddd99b2addca44e5cbde6b59f8

Formbook

982a9a52e532bbfe52941c4ab95c2899c1af75e9a3eee2b1977e3f49e8a3e71e

Formbook

a40c92a00ca0f04cd04883d555859cf2c8e884a01329defd3631c7cc61204ff8

Formbook

bbcaa127862b5b70b5a833b3136f431c03a9165dd0a4646ba78922ebcc7ebdc3

Formbook

c1aa65f7c2cc6beb7052c8ada46a3139fc01da66890f4153a7c5761292b71d61

Formbook

+ 177 additional samples on MalwareBazaar

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook campaign:cc73 rat spyware stealer trojan

Link:

https://tria.ge/reports/231102-lpw85scb54/

Behaviour

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Deletes itself

Formbook payload

Formbook

Unpacked files

SH256 hash:

85742944caaebe01cf4101666af159c0dfa0c83af58b822712ec304d5c3d9216

MD5 hash:

91188c3915c320085050b9835be0d98f

SHA1 hash:

f69e069eb750d05308fa45140021b2c4cbd188c4

Detections:

win_formbook_auto

win_formbook_g0

Link:

https://www.unpac.me/results/d7f0a35b-69d4-4ca4-aee5-84a0401181e6/

Parent samples :

93bc82b99ec0339576f7f93e026ee2dc33b8bdddd99b2addca44e5cbde6b59f8
3106ab616dc892b43c8d9c28a9fc9f83b3e4676b5e4e61dc0dd97bab8d6072e1
81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1
38049c6c8b70728eee0ec280abd6bef7a3eecc10a0ae541bcda4b6f3312d4bc9
6aeb335b3a8c4506ba69d98007266a0210930cddabc6d3fe6b6c0a28e59ae7db
5c0b363499da0abc5bfe5213d4ccff6ecf5f4b8d2ba2bc6b143f3a79c135e0ce

SH256 hash:

d01f3dea3851602ba5a0586c60430d286adf6fcc7e17aab080601a66630606e5

MD5 hash:

579197d4f760148a9482d1ebde113259

SHA1 hash:

cf6924eb360c7e5a117323bebcb6ee02d2aec86d

Link:

https://www.unpac.me/results/d7f0a35b-69d4-4ca4-aee5-84a0401181e6/

SH256 hash:

e6aa1d4d9bd6770e634a510fd747abf202375e391b0135e5276d66ac800b53b2

MD5 hash:

62d50a48867897ff835d27696be9b979

SHA1 hash:

6adfaa811f37ab00e28e2f68ad88f4eab469703f

Link:

https://www.unpac.me/results/d7f0a35b-69d4-4ca4-aee5-84a0401181e6/

SH256 hash:

2fc6e7a93e0fbed4e6ca48c98af13c7339db7bff52a1bdce39b1c83c8e453878

MD5 hash:

af053f732b77a9c89118b0e73d2dd656

SHA1 hash:

64b34d32f5dca8ec21ffeceebe6d6c9dfc562c4d

Link:

https://www.unpac.me/results/d7f0a35b-69d4-4ca4-aee5-84a0401181e6/

SH256 hash:

81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1

MD5 hash:

646d8eec77ad22f3736542618cca0039

SHA1 hash:

3cfff1e1e7dd6a71ab5998824a445ec1f2a1037c

Link:

https://www.unpac.me/results/d7f0a35b-69d4-4ca4-aee5-84a0401181e6/

Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/81f680191094/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/81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1

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:	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:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	maldoc_getEIP_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

Rule name:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

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

Rule name:	pe_imphash Create hunting rule

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:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	Windows_Trojan_Formbook Create hunting rule
Author:	@malgamy12

Rule name:	Windows_Trojan_Formbook_1112e116 Create hunting rule
Author:	Elastic Security

Rule name:	win_formbook_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	Detects win.formbook.

Rule name:	win_formbook_w0 Create hunting rule
Author:	@malgamy12

File information

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

Malspam

Formbook

zip cedbc49994b3d73921eae47e101311e255f9efdcbff58acd6e4e61ec1f47f95e

Formbook

exe 81f680191094ca2497c7798b37b83009157a7201dc0f27839c2860d5eb968fd1

(this sample)

Delivery method

Other

Dropped by

SHA256 cedbc49994b3d73921eae47e101311e255f9efdcbff58acd6e4e61ec1f47f95e

Cape

https://www.capesandbox.com/analysis/457759/

Dropped by

MD5 10d4bfb06fb6f1b281ade80d95ea6c26

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