MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb. 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 2 File information Comments 1

SHA256 hash:	c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb
SHA3-384 hash:	4665176938a8246958ed32d4e490d8828b25f3a4bd2c37282e5a18be08bfdd1c4c5b8a0d95920de523b7cebda13c47e9
SHA1 hash:	d6afd68cca616d505ac13532c008c328f225947d
MD5 hash:	25a6280b20b14dc747c700a1a91cb51b
humanhash:	hot-april-five-oxygen
File name:	25a6280b20b14dc747c700a1a91cb51b
Download:	download sample
Signature	Formbook Create hunting rule
File size:	549'888 bytes
First seen:	2023-06-28 08:30:31 UTC
Last seen:	2023-06-28 09:31:04 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'747 x AgentTesla, 19'642 x Formbook, 12'245 x SnakeKeylogger)
ssdeep	12288:JPComBcpx1XTaASnOXo3aqhgXMQhbqCEPUwfqzbXKxySLJpcnZlmYH7J:4omB6RNhRqC3RHqDcnZ3l
Threatray	2'386 similar samples on MalwareBazaar
TLSH	T1FDC4120B75E9275BC09917FF26E2718567B8677E6004FBCA4CC2B5C6C4DA7928180AF3
TrID	71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10523/12/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4505/5/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9)
File icon (PE):
dhash icon	e0cc8e8e8eccccf0 (19 x AgentTesla, 8 x Loki, 7 x Formbook)
Reporter	zbetcheckin
Tags:	32 exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

315

Origin country :

Vendor Threat Intelligence

Malware family:

formbook

ID:

File name:

PO#28730.doc

Verdict:

Malicious activity

Analysis date:

2023-06-27 10:51:05 UTC

Tags:

exploit cve-2017-11882 loader formbook xloader

Link:

https://app.any.run/tasks/779932e8-ab55-4fd6-a80a-bdcdfe7c6b13

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/403437/

Detection(s):

SecuriteInfo.com.Trojan.PackedNET.2137.18091.8647.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a process with a hidden window

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

formbook packed

Link:

https://www.filescan.io/uploads/649befc7313e9da61a5bb47c/reports/eb979872-b7c0-468a-bf7d-0e38492d7c56/overview

Verdict:

Malicious

Labled as:

Ser.Lazy.Generic

Link:

https://www.hybrid-analysis.com/sample/c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb

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/81ff70d2-b639-4e77-8fea-bc9bb3fb840a

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1262542

Signature

.NET source code contains potential unpacker

Adds a directory exclusion to Windows Defender

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Found malware configuration

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Modifies the context of a thread in another process (thread injection)

Modifies the prolog of user mode functions (user mode inline hooks)

Multi AV Scanner detection for submitted file

Queues an APC in another process (thread injection)

Sample uses process hollowing technique

System process connects to network (likely due to code injection or exploit)

Tries to detect virtualization through RDTSC time measurements

Yara detected FormBook

Behaviour

Behavior Graph:

Download SVG

Detection:

formbook

Link:

https://mwdb.cert.pl/sample/c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb/

Threat name:

Win32.Trojan.FormBook

Status:

Malicious

First seen:

2023-06-27 11:21:01 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

18 of 24 (75.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=zaojxjaa2gd6h6o5xq6jwmnfvsnofuics2ndbuejnmm67umydtvq._file

Verdict:

malicious

Label(s):

formbook

Formbook

0c5bd52278038e9194792544aa9ba56fa2fc62cdd74b5f5e47d8ab6ee7db5d0e

Formbook

1fdbc93a0a891ff9ca424bb90bd696140b5918583ad6e0f2fcce012640cde8dd

Formbook

4a85949b7ffe19e22e4191b55b225cb3ac8b59246785144f585006b94e9ba574

Formbook

4bc94463128cf70668fd065145a32e224079cea070e389b048ea28846de6f0c8

Formbook

6df873769694ef3980e2e19d8c657e4d993938b9c9ee8912a95f83027f1a2ea0

Formbook

7806b747871480b540e81ab255b9f18a97d7fd8ee150b2c85484acf08174b5ca

Formbook

a1a882d7abefdec8678649330339a2f080a777450da1be5110b88e81a8ea38cc

Formbook

aee5d1b7326545ff692b98743e04d035e01415300fea8a5bf445d3490d6776cc

Formbook

cfe9062e6bd88ae993c3e8b295386c2e5e9aa7d8b9ceb168f56ccd3e0e5cbe36

Formbook

+ 2'376 additional samples on MalwareBazaar

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook campaign:fgh2 rat spyware stealer trojan

Link:

https://tria.ge/reports/230628-kepwmshg2x/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Suspicious use of SetThreadContext

Checks computer location settings

Formbook payload

Formbook

Unpacked files

SH256 hash:

823484e602c771fa3b7f4dc3a725a4ab71de5dfc1454524b06d35d155e74e692

MD5 hash:

3d91fe4bf2361a0447535dabdfdbb367

SHA1 hash:

ab598abc771ad81058679026f78d4520aa5c4cf3

Detections:

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

Parent samples :

7806b747871480b540e81ab255b9f18a97d7fd8ee150b2c85484acf08174b5ca
c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb
2a43da13d635789edfb0cd6928427911e3295c06e921cebdaa3319c7c1f65b77

SH256 hash:

8022eb6a31ff09510ea4bc66e3a92f6f5ef5cd23412d10e12207e93ec38c3672

MD5 hash:

14ee8b8b7e47469317d1012f0898b111

SHA1 hash:

c6da4e2f1ab8c277129026648cbf97d8d6126245

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

427b6dac46239e0403b3d881ac71f973a97e3908f05767b14aae59e7486e05f6

MD5 hash:

135003a32daebaf20f47a4f6f2114bce

SHA1 hash:

6917f1baf7ff060e268e08b3f41b19c85562b9c7

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

68f415ab5ad686e3c50f2bd080b5dae527005907fa2757d675fe4fabce466541

MD5 hash:

fe1dc254ed9e3501b7a6a5f6a20194e7

SHA1 hash:

31971347bf63d60cadcfba6857b8b7237bfc986f

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

823484e602c771fa3b7f4dc3a725a4ab71de5dfc1454524b06d35d155e74e692

MD5 hash:

3d91fe4bf2361a0447535dabdfdbb367

SHA1 hash:

ab598abc771ad81058679026f78d4520aa5c4cf3

Detections:

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

Parent samples :

7806b747871480b540e81ab255b9f18a97d7fd8ee150b2c85484acf08174b5ca
c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb
2a43da13d635789edfb0cd6928427911e3295c06e921cebdaa3319c7c1f65b77

SH256 hash:

8022eb6a31ff09510ea4bc66e3a92f6f5ef5cd23412d10e12207e93ec38c3672

MD5 hash:

14ee8b8b7e47469317d1012f0898b111

SHA1 hash:

c6da4e2f1ab8c277129026648cbf97d8d6126245

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

427b6dac46239e0403b3d881ac71f973a97e3908f05767b14aae59e7486e05f6

MD5 hash:

135003a32daebaf20f47a4f6f2114bce

SHA1 hash:

6917f1baf7ff060e268e08b3f41b19c85562b9c7

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

68f415ab5ad686e3c50f2bd080b5dae527005907fa2757d675fe4fabce466541

MD5 hash:

fe1dc254ed9e3501b7a6a5f6a20194e7

SHA1 hash:

31971347bf63d60cadcfba6857b8b7237bfc986f

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

823484e602c771fa3b7f4dc3a725a4ab71de5dfc1454524b06d35d155e74e692

MD5 hash:

3d91fe4bf2361a0447535dabdfdbb367

SHA1 hash:

ab598abc771ad81058679026f78d4520aa5c4cf3

Detections:

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

Parent samples :

7806b747871480b540e81ab255b9f18a97d7fd8ee150b2c85484acf08174b5ca
c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb
2a43da13d635789edfb0cd6928427911e3295c06e921cebdaa3319c7c1f65b77

SH256 hash:

8022eb6a31ff09510ea4bc66e3a92f6f5ef5cd23412d10e12207e93ec38c3672

MD5 hash:

14ee8b8b7e47469317d1012f0898b111

SHA1 hash:

c6da4e2f1ab8c277129026648cbf97d8d6126245

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

427b6dac46239e0403b3d881ac71f973a97e3908f05767b14aae59e7486e05f6

MD5 hash:

135003a32daebaf20f47a4f6f2114bce

SHA1 hash:

6917f1baf7ff060e268e08b3f41b19c85562b9c7

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

823484e602c771fa3b7f4dc3a725a4ab71de5dfc1454524b06d35d155e74e692

MD5 hash:

3d91fe4bf2361a0447535dabdfdbb367

SHA1 hash:

ab598abc771ad81058679026f78d4520aa5c4cf3

Detections:

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

FormBook

win_formbook_w0

win_formbook_auto

win_formbook_g0

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

Parent samples :

7806b747871480b540e81ab255b9f18a97d7fd8ee150b2c85484acf08174b5ca
c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb
2a43da13d635789edfb0cd6928427911e3295c06e921cebdaa3319c7c1f65b77

SH256 hash:

68f415ab5ad686e3c50f2bd080b5dae527005907fa2757d675fe4fabce466541

MD5 hash:

fe1dc254ed9e3501b7a6a5f6a20194e7

SHA1 hash:

31971347bf63d60cadcfba6857b8b7237bfc986f

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

8022eb6a31ff09510ea4bc66e3a92f6f5ef5cd23412d10e12207e93ec38c3672

MD5 hash:

14ee8b8b7e47469317d1012f0898b111

SHA1 hash:

c6da4e2f1ab8c277129026648cbf97d8d6126245

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

427b6dac46239e0403b3d881ac71f973a97e3908f05767b14aae59e7486e05f6

MD5 hash:

135003a32daebaf20f47a4f6f2114bce

SHA1 hash:

6917f1baf7ff060e268e08b3f41b19c85562b9c7

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

68f415ab5ad686e3c50f2bd080b5dae527005907fa2757d675fe4fabce466541

MD5 hash:

fe1dc254ed9e3501b7a6a5f6a20194e7

SHA1 hash:

31971347bf63d60cadcfba6857b8b7237bfc986f

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

SH256 hash:

c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb

MD5 hash:

25a6280b20b14dc747c700a1a91cb51b

SHA1 hash:

d6afd68cca616d505ac13532c008c328f225947d

Link:

https://www.unpac.me/results/d8e956fe-fc57-45ef-b828-6d3dfb59e239/

Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/c81c9ba400d1/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/c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb

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_imphash Create hunting rule

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

File information

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

Web download

Formbook

exe c81c9ba400d187e3f9ddbc3c9b31a5ac9ae2d102969a30d0896b19efd1981ceb

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/2673342/

Cape

https://www.capesandbox.com/analysis/403437/

Comments

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zbet commented on 2023-06-28 08:30:32 UTC

url : hxxp://79.110.49.21/defounderzx.exe