formbook | 0ab24b5c9e24d195f00fa83a9078606341d6e7f56fc60c0b727a8f2c2b905c02

General

Target

TT_COPY.exe
Size

430KB
MD5

b38f111117f91cee4e7a32d369e5f647
SHA1

ad2036f338ed3e3a75b9dc2feb8425cb09968b01
SHA256

0ab24b5c9e24d195f00fa83a9078606341d6e7f56fc60c0b727a8f2c2b905c02
SHA512

af101647a761abae5c2d8285c0be3f3350b5be8f550ef7918001da2484f6ab6cea0c902f023c5cce7f838af3e498ecbff2ce24384980977d93b9f7185a9fe403

Score

10^/10

formbook b3n1 rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

b3n1

Decoy

alexandragrows.com

shellload.com

stanleyrorke.com

glasurit.us

facebookismetaverse.com

astoundingaffairs.com

facom.us

dysonsaleoutlet.us

obtengaunitedhealthcare.com

sebastianroofrepairs.com

saltvent.com

littleonesclub.com

webamazoncardshopmail.xyz

lutam.xyz

myfirstpsgame.com

comline.cloud

valueinsightfororacle.com

congregacionansestral.com.co

paypal-uk.xyz

facebookversuzmeta.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1968-56-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1968-61-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/540-66-0x0000000000090000-0x00000000000BF000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

564 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

TT_COPY.exe

pid process

1684 TT_COPY.exe

pid	process
564	cmd.exe

pid	process
1684	TT_COPY.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

TT_COPY.exeTT_COPY.execmstp.exe

description	pid	process	target process
PID 1684 set thread context of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1968 set thread context of 1396	1968	TT_COPY.exe	Explorer.EXE
PID 1968 set thread context of 1396	1968	TT_COPY.exe	Explorer.EXE
PID 540 set thread context of 1396	540	cmstp.exe	Explorer.EXE

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

TT_COPY.execmstp.exe

pid	process
1968	TT_COPY.exe
1968	TT_COPY.exe
1968	TT_COPY.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe
540	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1396 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

TT_COPY.execmstp.exe

pid process

1968 TT_COPY.exe
1968 TT_COPY.exe
1968 TT_COPY.exe
1968 TT_COPY.exe
540 cmstp.exe
540 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

TT_COPY.execmstp.exe

description pid process

Token: SeDebugPrivilege 1968 TT_COPY.exe
Token: SeDebugPrivilege 540 cmstp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1396 Explorer.EXE
1396 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1396 Explorer.EXE
1396 Explorer.EXE

pid	process
1396	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1968	TT_COPY.exe
Token: SeDebugPrivilege	540	cmstp.exe

pid	process
1396	Explorer.EXE
1396	Explorer.EXE

pid	process
1396	Explorer.EXE
1396	Explorer.EXE

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

TT_COPY.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1684 wrote to memory of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1684 wrote to memory of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1684 wrote to memory of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1684 wrote to memory of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1684 wrote to memory of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1684 wrote to memory of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1684 wrote to memory of 1968	1684	TT_COPY.exe	TT_COPY.exe
PID 1396 wrote to memory of 540	1396	Explorer.EXE	cmstp.exe
PID 1396 wrote to memory of 540	1396	Explorer.EXE	cmstp.exe
PID 1396 wrote to memory of 540	1396	Explorer.EXE	cmstp.exe
PID 1396 wrote to memory of 540	1396	Explorer.EXE	cmstp.exe
PID 1396 wrote to memory of 540	1396	Explorer.EXE	cmstp.exe
PID 1396 wrote to memory of 540	1396	Explorer.EXE	cmstp.exe
PID 1396 wrote to memory of 540	1396	Explorer.EXE	cmstp.exe
PID 540 wrote to memory of 564	540	cmstp.exe	cmd.exe
PID 540 wrote to memory of 564	540	cmstp.exe	cmd.exe
PID 540 wrote to memory of 564	540	cmstp.exe	cmd.exe
PID 540 wrote to memory of 564	540	cmstp.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1396

C:\Users\Admin\AppData\Local\Temp\TT_COPY.exe
"C:\Users\Admin\AppData\Local\Temp\TT_COPY.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1684

C:\Users\Admin\AppData\Local\Temp\TT_COPY.exe
"C:\Users\Admin\AppData\Local\Temp\TT_COPY.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1968

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:540

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\TT_COPY.exe"
3⤵
- Deletes itself
PID:564

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nstC277.tmp\zcnjabehxo.dll
MD5
7868bf8834a0fe5b7590dde280a53351

SHA1
ae9abcc313e778d5ffe4e1d68a330ea14ee01dbc

SHA256
db0c352adce776fc3777006c1cbdeed7b1f7bf2adea4b284a5c2c5b25afca43e

SHA512
c7636f2aa4e294cfa0a1aa66e502f8a773663fcd6d54551adb133bbe55ac3a4b9d42fcf723a92de791a030e22a9c1c018f7852989ca1aea2b24978c87bfa0cf5

Download Submit
memory/540-65-0x0000000000170000-0x0000000000188000-memory.dmp

Filesize
96KB

Download
memory/540-68-0x0000000001C60000-0x0000000001CF4000-memory.dmp

Filesize
592KB

Download
memory/540-67-0x0000000001DF0000-0x00000000020F3000-memory.dmp

Filesize
3.0MB

Download
memory/540-66-0x0000000000090000-0x00000000000BF000-memory.dmp

Filesize
188KB

Download
memory/1396-69-0x0000000006CC0000-0x0000000006D8E000-memory.dmp

Filesize
824KB

Download
memory/1396-60-0x0000000006700000-0x000000000683B000-memory.dmp

Filesize
1.2MB

Download
memory/1396-63-0x0000000006B10000-0x0000000006C35000-memory.dmp

Filesize
1.1MB

Download
memory/1684-54-0x0000000075D51000-0x0000000075D53000-memory.dmp

Filesize
8KB

Download
memory/1968-58-0x0000000000730000-0x0000000000A33000-memory.dmp

Filesize
3.0MB

Download
memory/1968-62-0x00000000003A0000-0x00000000003B5000-memory.dmp

Filesize
84KB

Download
memory/1968-61-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1968-59-0x0000000000350000-0x0000000000365000-memory.dmp

Filesize
84KB

Download
memory/1968-56-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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