formbook | 331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3

General

Target

331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe
Size

599KB
MD5

2417cdb09f72141abfa45cb64e699d91
SHA1

1ddc6b218dd520915ba8933e8214f307387b0e13
SHA256

331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3
SHA512

39e83bd1bb9c0a2d529216ba75bd5ad15ebffb836c188e2723633e58203d2008ff6efb3995b51209992eee3120a36852939925d0282b4b218ceafd0c98f622c6
SSDEEP

12288:Hiu6oMr21DjiSdBaLMl7kKxYBQWHm6ayJNMH00qLsPBUr4wtJ:Hi/KDjJdPbyvm6DrMHPsLr/L

Score

10^/10

formbook fs83 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

fs83

Decoy

blastol.space

tomwalkerisfalco.com

us-sumatrraslimbellytonic.com

drywallandpaintingservice.com

vntapp.net

passportpages.site

at-mim.com

yeondagoods.com

teomanyildirim.com

paygame.site

senze.art

alhandco.com

9831bsej.xyz

traumatic.xyz

sos-soutien.com

thetechnolgy.live

washing-machine-46612.bond

marvsneakers.com

shequbaike.net

xc4f35fg4h35fg4h53.top

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

Formbook payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3140-12-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3140-21-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1456-57-0x0000000000B90000-0x0000000000BBF000-memory.dmp	formbook
behavioral2/memory/1456-68-0x0000000000B90000-0x0000000000BBF000-memory.dmp	formbook

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:

331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exeRegSvcs.exechkdsk.exe

description	pid	process	target process
PID 1788 set thread context of 3140	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	RegSvcs.exe
PID 3140 set thread context of 3384	3140	RegSvcs.exe	Explorer.EXE
PID 1456 set thread context of 3384	1456	chkdsk.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

RegSvcs.exepowershell.exechkdsk.exe

pid	process
3140	RegSvcs.exe
3140	RegSvcs.exe
3140	RegSvcs.exe
3140	RegSvcs.exe
3140	RegSvcs.exe
3140	RegSvcs.exe
4920	powershell.exe
4920	powershell.exe
4920	powershell.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe
1456	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

RegSvcs.exechkdsk.exe

pid process

3140 RegSvcs.exe
3140 RegSvcs.exe
3140 RegSvcs.exe
1456 chkdsk.exe
1456 chkdsk.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

RegSvcs.exepowershell.exechkdsk.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	3140	RegSvcs.exe
Token: SeDebugPrivilege	4920	powershell.exe
Token: SeDebugPrivilege	1456	chkdsk.exe
Token: SeShutdownPrivilege	3384	Explorer.EXE
Token: SeCreatePagefilePrivilege	3384	Explorer.EXE

Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid process

3384 Explorer.EXE

pid	process
3384	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1788 wrote to memory of 4920	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	powershell.exe
PID 1788 wrote to memory of 4920	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	powershell.exe
PID 1788 wrote to memory of 4920	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	powershell.exe
PID 1788 wrote to memory of 3140	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	RegSvcs.exe
PID 1788 wrote to memory of 3140	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	RegSvcs.exe
PID 1788 wrote to memory of 3140	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	RegSvcs.exe
PID 1788 wrote to memory of 3140	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	RegSvcs.exe
PID 1788 wrote to memory of 3140	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	RegSvcs.exe
PID 1788 wrote to memory of 3140	1788	331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe	RegSvcs.exe
PID 3384 wrote to memory of 1456	3384	Explorer.EXE	chkdsk.exe
PID 3384 wrote to memory of 1456	3384	Explorer.EXE	chkdsk.exe
PID 3384 wrote to memory of 1456	3384	Explorer.EXE	chkdsk.exe
PID 1456 wrote to memory of 3008	1456	chkdsk.exe	cmd.exe
PID 1456 wrote to memory of 3008	1456	chkdsk.exe	cmd.exe
PID 1456 wrote to memory of 3008	1456	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3384

C:\Users\Admin\AppData\Local\Temp\331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe
"C:\Users\Admin\AppData\Local\Temp\331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1788

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\331ca91b3a643aab796547bdd69ecd624ab13ac224ea80f88ca4a8987c0625e3.exe"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4920

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3140

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1456

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
3⤵
PID:3008

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_upo1r1uf.zwb.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1456-72-0x0000000001310000-0x00000000013A3000-memory.dmp

Filesize
588KB

Download
memory/1456-55-0x0000000000110000-0x000000000011A000-memory.dmp

Filesize
40KB

Download
memory/1456-56-0x0000000000110000-0x000000000011A000-memory.dmp

Filesize
40KB

Download
memory/1456-57-0x0000000000B90000-0x0000000000BBF000-memory.dmp

Filesize
188KB

Download
memory/1456-60-0x0000000001560000-0x00000000018AA000-memory.dmp

Filesize
3.3MB

Download
memory/1456-68-0x0000000000B90000-0x0000000000BBF000-memory.dmp

Filesize
188KB

Download
memory/1788-5-0x0000000005340000-0x000000000534A000-memory.dmp

Filesize
40KB

Download
memory/1788-8-0x0000000005930000-0x0000000005948000-memory.dmp

Filesize
96KB

Download
memory/1788-9-0x0000000006710000-0x000000000671E000-memory.dmp

Filesize
56KB

Download
memory/1788-10-0x0000000006720000-0x0000000006734000-memory.dmp

Filesize
80KB

Download
memory/1788-11-0x000000000A510000-0x000000000A586000-memory.dmp

Filesize
472KB

Download
memory/1788-1-0x0000000074550000-0x0000000074D00000-memory.dmp

Filesize
7.7MB

Download
memory/1788-16-0x0000000074550000-0x0000000074D00000-memory.dmp

Filesize
7.7MB

Download
memory/1788-7-0x0000000007DA0000-0x0000000007E32000-memory.dmp

Filesize
584KB

Download
memory/1788-6-0x0000000005610000-0x00000000056AC000-memory.dmp

Filesize
624KB

Download
memory/1788-4-0x00000000052A0000-0x00000000052B0000-memory.dmp

Filesize
64KB

Download
memory/1788-3-0x00000000053A0000-0x0000000005432000-memory.dmp

Filesize
584KB

Download
memory/1788-2-0x0000000005950000-0x0000000005EF4000-memory.dmp

Filesize
5.6MB

Download
memory/1788-0-0x00000000008B0000-0x000000000094A000-memory.dmp

Filesize
616KB

Download
memory/3140-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3140-20-0x0000000001090000-0x00000000010A4000-memory.dmp

Filesize
80KB

Download
memory/3140-19-0x0000000001230000-0x000000000157A000-memory.dmp

Filesize
3.3MB

Download
memory/3140-21-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3384-79-0x0000000008310000-0x0000000008438000-memory.dmp

Filesize
1.2MB

Download
memory/3384-76-0x0000000008310000-0x0000000008438000-memory.dmp

Filesize
1.2MB

Download
memory/3384-75-0x0000000008310000-0x0000000008438000-memory.dmp

Filesize
1.2MB

Download
memory/3384-23-0x0000000008240000-0x0000000008303000-memory.dmp

Filesize
780KB

Download
memory/4920-39-0x0000000005D90000-0x0000000005DDC000-memory.dmp

Filesize
304KB

Download
memory/4920-59-0x0000000007020000-0x000000000703A000-memory.dmp

Filesize
104KB

Download
memory/4920-40-0x000000007FC20000-0x000000007FC30000-memory.dmp

Filesize
64KB

Download
memory/4920-41-0x00000000062C0000-0x00000000062F2000-memory.dmp

Filesize
200KB

Download
memory/4920-42-0x0000000070410000-0x000000007045C000-memory.dmp

Filesize
304KB

Download
memory/4920-53-0x0000000002570000-0x0000000002580000-memory.dmp

Filesize
64KB

Download
memory/4920-52-0x00000000062A0000-0x00000000062BE000-memory.dmp

Filesize
120KB

Download
memory/4920-54-0x0000000006EE0000-0x0000000006F83000-memory.dmp

Filesize
652KB

Download
memory/4920-22-0x0000000004F10000-0x0000000005538000-memory.dmp

Filesize
6.2MB

Download
memory/4920-38-0x0000000005D00000-0x0000000005D1E000-memory.dmp

Filesize
120KB

Download
memory/4920-58-0x0000000007670000-0x0000000007CEA000-memory.dmp

Filesize
6.5MB

Download
memory/4920-29-0x0000000005720000-0x0000000005A74000-memory.dmp

Filesize
3.3MB

Download
memory/4920-18-0x0000000002570000-0x0000000002580000-memory.dmp

Filesize
64KB

Download
memory/4920-24-0x0000000004C20000-0x0000000004C42000-memory.dmp

Filesize
136KB

Download
memory/4920-61-0x0000000007090000-0x000000000709A000-memory.dmp

Filesize
40KB

Download
memory/4920-62-0x00000000072A0000-0x0000000007336000-memory.dmp

Filesize
600KB

Download
memory/4920-63-0x0000000007220000-0x0000000007231000-memory.dmp

Filesize
68KB

Download
memory/4920-64-0x0000000007250000-0x000000000725E000-memory.dmp

Filesize
56KB

Download
memory/4920-65-0x0000000007260000-0x0000000007274000-memory.dmp

Filesize
80KB

Download
memory/4920-66-0x0000000007360000-0x000000000737A000-memory.dmp

Filesize
104KB

Download
memory/4920-67-0x0000000007340000-0x0000000007348000-memory.dmp

Filesize
32KB

Download
memory/4920-17-0x0000000074550000-0x0000000074D00000-memory.dmp

Filesize
7.7MB

Download
memory/4920-71-0x0000000074550000-0x0000000074D00000-memory.dmp

Filesize
7.7MB

Download
memory/4920-14-0x0000000000D20000-0x0000000000D56000-memory.dmp

Filesize
216KB

Download
memory/4920-25-0x0000000005640000-0x00000000056A6000-memory.dmp

Filesize
408KB

Download
memory/4920-27-0x00000000056B0000-0x0000000005716000-memory.dmp

Filesize
408KB

Download
memory/4920-26-0x0000000002570000-0x0000000002580000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads