formbook | 7afd3634a44e0fac1006ed44b66e67fc4c58704cfcfcbe2266c9f52a3fcccbd6

General

Target

rrr.exe
Size

298KB
MD5

e29af60c4ef79bee0553d2fb6e5e45bf
SHA1

621afdcdfdba54a39c17ff294879dcfdb944593e
SHA256

7afd3634a44e0fac1006ed44b66e67fc4c58704cfcfcbe2266c9f52a3fcccbd6
SHA512

6b1e06f84e16670c444adc4f465d0aab9339dd72f3dca95bed3484ad51556a9879f2ccf87146294011b723b10996fe47ff34a866426037f89c98b1100a0ed611

Score

10^/10

formbook neshta s3s3 persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

s3s3

Decoy

tvielotus.com

teesta.xyz

talentrecruitor.com

pamaungipb.com

xn--90ahkh6a6b8b.site

910carolina.com

toyotaecoyouth-dev.com

invetnables.com

gdexc.com

ssw168.com

householdmould.com

mqttradar.xyz

t333c.com

thepausestudio.com

evershedsutherlands.com

asbdataplus.com

preddylilthingz.com

jepwu.com

tvlido.com

artovus.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Modifies system executable filetype association 2 TTPs 1 IoCs
persistence

Modify Registry
T1112

Change Default File Association
T1042

Processes:

rrr.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*" rrr.exe
Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	rrr.exe

Formbook Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1180-136-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1180-142-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3504-144-0x0000000000A90000-0x0000000000ABF000-memory.dmp	formbook
behavioral2/memory/3504-150-0x0000000000A90000-0x0000000000ABF000-memory.dmp	formbook

Executes dropped EXE 1 IoCs

Processes:

rrr.exe

pid process

4144 rrr.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

rrr.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation rrr.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	rrr.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

rrr.execvtres.exeexplorer.exe

description	pid	process	target process
PID 4144 set thread context of 1180	4144	rrr.exe	cvtres.exe
PID 1180 set thread context of 3020	1180	cvtres.exe	Explorer.EXE
PID 3504 set thread context of 3020	3504	explorer.exe	Explorer.EXE

Drops file in Program Files directory 64 IoCs

Processes:

rrr.exe

description	ioc	process
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\Browser\WCCHRO~1\WCCHRO~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ExtExport.exe	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmpconfig.exe	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wabmig.exe	rrr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\arh.exe	rrr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\AdobeARM.exe	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\wab.exe	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\PWAHEL~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\PWAHEL~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\MicrosoftEdgeUpdate.exe	rrr.exe
File opened for modification	C:\PROGRA~3\Adobe\Setup\{AC76B~1\setup.exe	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\32BITM~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~4.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\IDENTI~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROBR~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13157~1.61\MICROS~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GO664E~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmlaunch.exe	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13157~1.61\MIA062~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmplayer.exe	rrr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~3.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13157~1.61\MICROS~3.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\setup_wm.exe	rrr.exe
File opened for modification	C:\PROGRA~2\WI8A19~1\ImagingDevices.exe	rrr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jusched.exe	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\INSTAL~1\setup.exe	rrr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\BHO\IE_TO_~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmprph.exe	rrr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{33D1F~1\VCREDI~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADOBEC~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\FULLTR~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\LOGTRA~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOBD5D~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~2.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\wmpshare.exe	rrr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroCEF\RdrCEF.exe	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroRd32.exe	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOOGLE~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\WINDOW~3\ACCESS~1\wordpad.exe	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\ADelRCP.exe	rrr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\ARM\1.0\ADOBEA~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\ELEVAT~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\READER~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.71\GOF5E2~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\COOKIE~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13157~1.61\MICROS~4.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\EDGEUP~1\13157~1.61\MI391D~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\Adobe\ACROBA~1\Reader\plug_ins\PI_BRO~1\64BITM~1.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Java\JAVAUP~1\jaureg.exe	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~3.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\920902~1.67\MSEDGE~2.EXE	rrr.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Edge\APPLIC~1\MSEDGE~1.EXE	rrr.exe

Drops file in Windows directory 1 IoCs

Processes:

rrr.exe

description ioc process

File opened for modification C:\Windows\svchost.com rrr.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

rrr.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*" rrr.exe

description	ioc	process
File opened for modification	C:\Windows\svchost.com	rrr.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	rrr.exe

Suspicious behavior: EnumeratesProcesses 44 IoCs

Processes:

rrr.execvtres.exeexplorer.exe

pid	process
4144	rrr.exe
4144	rrr.exe
1180	cvtres.exe
1180	cvtres.exe
1180	cvtres.exe
1180	cvtres.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe
3504	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3020 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

cvtres.exeexplorer.exe

pid process

1180 cvtres.exe
1180 cvtres.exe
1180 cvtres.exe
3504 explorer.exe
3504 explorer.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

rrr.execvtres.exeexplorer.exe

description pid process

Token: SeDebugPrivilege 4144 rrr.exe
Token: SeDebugPrivilege 1180 cvtres.exe
Token: SeDebugPrivilege 3504 explorer.exe

pid	process
3020	Explorer.EXE

pid	process
1180	cvtres.exe
1180	cvtres.exe
1180	cvtres.exe
3504	explorer.exe
3504	explorer.exe

description	pid	process
Token: SeDebugPrivilege	4144	rrr.exe
Token: SeDebugPrivilege	1180	cvtres.exe
Token: SeDebugPrivilege	3504	explorer.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

rrr.exerrr.exeExplorer.EXEexplorer.exe

description	pid	process	target process
PID 4428 wrote to memory of 4144	4428	rrr.exe	rrr.exe
PID 4428 wrote to memory of 4144	4428	rrr.exe	rrr.exe
PID 4428 wrote to memory of 4144	4428	rrr.exe	rrr.exe
PID 4144 wrote to memory of 1660	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1660	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1660	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1180	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1180	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1180	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1180	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1180	4144	rrr.exe	cvtres.exe
PID 4144 wrote to memory of 1180	4144	rrr.exe	cvtres.exe
PID 3020 wrote to memory of 3504	3020	Explorer.EXE	explorer.exe
PID 3020 wrote to memory of 3504	3020	Explorer.EXE	explorer.exe
PID 3020 wrote to memory of 3504	3020	Explorer.EXE	explorer.exe
PID 3504 wrote to memory of 1928	3504	explorer.exe	cmd.exe
PID 3504 wrote to memory of 1928	3504	explorer.exe	cmd.exe
PID 3504 wrote to memory of 1928	3504	explorer.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3020

C:\Users\Admin\AppData\Local\Temp\rrr.exe
"C:\Users\Admin\AppData\Local\Temp\rrr.exe"
2⤵
- Modifies system executable filetype association
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4428

C:\Users\Admin\AppData\Local\Temp\3582-490\rrr.exe
"C:\Users\Admin\AppData\Local\Temp\3582-490\rrr.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4144

C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
4⤵
PID:1660

C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
4⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1180

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3504

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
PID:1928

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Change Default File Association

1

T1042

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\3582-490\rrr.exe
Filesize
257KB

MD5
c26f62be6304e0e2c12dba146a372c21

SHA1
2497d5377572816d9490f074949efde8e65f49f4

SHA256
45b1927934099ea95d315972f7f128ba3af4a64aa483d964f94c599e8e16f094

SHA512
365c33622bb675109dbf9093b0d2a5d3635c8cf9591ff3af6d4be3690499e40252b1ec3712d4031424cf2df8958b197566e995f58d511b16a301b28bdf9c5718

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\rrr.exe
Filesize
257KB

MD5
c26f62be6304e0e2c12dba146a372c21

SHA1
2497d5377572816d9490f074949efde8e65f49f4

SHA256
45b1927934099ea95d315972f7f128ba3af4a64aa483d964f94c599e8e16f094

SHA512
365c33622bb675109dbf9093b0d2a5d3635c8cf9591ff3af6d4be3690499e40252b1ec3712d4031424cf2df8958b197566e995f58d511b16a301b28bdf9c5718

Download Submit
memory/1180-139-0x0000000000B80000-0x0000000000B94000-memory.dmp

Filesize
80KB

Download
memory/1180-142-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1180-135-0x0000000000000000-mapping.dmp

Download
memory/1180-136-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1180-138-0x0000000001110000-0x000000000145A000-memory.dmp

Filesize
3.3MB

Download
memory/1660-134-0x0000000000000000-mapping.dmp

Download
memory/1928-146-0x0000000000000000-mapping.dmp

Download
memory/3020-140-0x0000000007C10000-0x0000000007D37000-memory.dmp

Filesize
1.2MB

Download
memory/3020-147-0x0000000007C10000-0x0000000007D37000-memory.dmp

Filesize
1.2MB

Download
memory/3020-149-0x0000000007D40000-0x0000000007ECC000-memory.dmp

Filesize
1.5MB

Download
memory/3020-151-0x0000000007D40000-0x0000000007ECC000-memory.dmp

Filesize
1.5MB

Download
memory/3504-141-0x0000000000000000-mapping.dmp

Download
memory/3504-143-0x00000000001D0000-0x0000000000603000-memory.dmp

Filesize
4.2MB

Download
memory/3504-144-0x0000000000A90000-0x0000000000ABF000-memory.dmp

Filesize
188KB

Download
memory/3504-145-0x0000000002AD0000-0x0000000002E1A000-memory.dmp

Filesize
3.3MB

Download
memory/3504-148-0x0000000002850000-0x00000000028E3000-memory.dmp

Filesize
588KB

Download
memory/3504-150-0x0000000000A90000-0x0000000000ABF000-memory.dmp

Filesize
188KB

Download
memory/4144-133-0x0000000000B30000-0x0000000000B70000-memory.dmp

Filesize
256KB

Download
memory/4144-130-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads