formbook | 37e98fef85aeb5097a5091d11fc844487642873e9e06a8d0734785dbe1ad1315

General

Target

original documents.exe
Size

279KB
MD5

0f9a52111f8c63b86a08421f2fe42786
SHA1

b3b277e8f9d73636a87c6b09f50f63dcfb25b7dd
SHA256

37e98fef85aeb5097a5091d11fc844487642873e9e06a8d0734785dbe1ad1315
SHA512

0c157a405f24e59e2e6d00e419c83fd68fec1893fe642fe5d3c6168e0ec74b6f247d28f728fd9fb7eeb6fbba2ed1ebb335ba301784cdf4d2705d44dce62fa2a7

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.knighttechinca.com/dxe/

Decoy

sardarfarm.com

959tremont.com

privat-livecam.net

ansel-homebakery.com

joysupermarket.com

peninsulamatchmakers.net

northsytyle.com

radioconexaoubermusic.com

relocatingrealtor.com

desyrnan.com

onlinehoortoestel.online

enpointe.online

rvvikings.com

paulpoirier.com

shitarpa.net

kerneis.net

rokitreach.com

essentiallygaia.com

prestiged.net

fuerzaagavera.com

Signatures

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

Formbook Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1788-64-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1444-72-0x0000000000090000-0x00000000000BE000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1760 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

original documents.exe

pid process

1052 original documents.exe

pid	process
1760	cmd.exe

pid	process
1052	original documents.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

original documents.exeoriginal documents.execmstp.exe

description	pid	process	target process
PID 1052 set thread context of 1788	1052	original documents.exe	original documents.exe
PID 1788 set thread context of 1208	1788	original documents.exe	Explorer.EXE
PID 1444 set thread context of 1208	1444	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:

original documents.execmstp.exe

pid	process
1788	original documents.exe
1788	original documents.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe
1444	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

original documents.exeoriginal documents.execmstp.exe

pid process

1052 original documents.exe
1788 original documents.exe
1788 original documents.exe
1788 original documents.exe
1444 cmstp.exe
1444 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

original documents.execmstp.exe

description pid process

Token: SeDebugPrivilege 1788 original documents.exe
Token: SeDebugPrivilege 1444 cmstp.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE

pid	process
1208	Explorer.EXE

pid	process
1052	original documents.exe
1788	original documents.exe
1788	original documents.exe
1788	original documents.exe
1444	cmstp.exe
1444	cmstp.exe

description	pid	process
Token: SeDebugPrivilege	1788	original documents.exe
Token: SeDebugPrivilege	1444	cmstp.exe

pid	process
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

original documents.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1052 wrote to memory of 1788	1052	original documents.exe	original documents.exe
PID 1052 wrote to memory of 1788	1052	original documents.exe	original documents.exe
PID 1052 wrote to memory of 1788	1052	original documents.exe	original documents.exe
PID 1052 wrote to memory of 1788	1052	original documents.exe	original documents.exe
PID 1052 wrote to memory of 1788	1052	original documents.exe	original documents.exe
PID 1208 wrote to memory of 1444	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1444	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1444	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1444	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1444	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1444	1208	Explorer.EXE	cmstp.exe
PID 1208 wrote to memory of 1444	1208	Explorer.EXE	cmstp.exe
PID 1444 wrote to memory of 1760	1444	cmstp.exe	cmd.exe
PID 1444 wrote to memory of 1760	1444	cmstp.exe	cmd.exe
PID 1444 wrote to memory of 1760	1444	cmstp.exe	cmd.exe
PID 1444 wrote to memory of 1760	1444	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:1208

C:\Users\Admin\AppData\Local\Temp\original documents.exe
"C:\Users\Admin\AppData\Local\Temp\original documents.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1052

C:\Users\Admin\AppData\Local\Temp\original documents.exe
"C:\Users\Admin\AppData\Local\Temp\original documents.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1788

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:1444

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\original documents.exe"
3⤵
- Deletes itself
PID:1760

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\nsn61B.tmp\udsdj.dll
MD5
053a82ea7d71e4171457a5be63c908f1

SHA1
15e4581e70de1535ba38ce5f2a7644d46dd8a1d9

SHA256
ece3f18788154b249625d589c5e1101ed54a07f4ed09c8b8b9076c6fddf34922

SHA512
2f850ddb917ebb8ca02c9954d879b77df16c1b6c88278ccd62b537d6f27a7dc767b6ccb433177ede4e347599e6399e0084332d15605e06cb6a5cd642af7e8223

Download Submit
memory/1052-62-0x00000000003C0000-0x00000000003C2000-memory.dmp

Filesize
8KB

Download
memory/1052-60-0x0000000075721000-0x0000000075723000-memory.dmp

Filesize
8KB

Download
memory/1208-75-0x0000000008060000-0x00000000081E2000-memory.dmp

Filesize
1.5MB

Download
memory/1208-67-0x0000000006FC0000-0x000000000712B000-memory.dmp

Filesize
1.4MB

Download
memory/1444-72-0x0000000000090000-0x00000000000BE000-memory.dmp

Filesize
184KB

Download
memory/1444-74-0x00000000004D0000-0x0000000000563000-memory.dmp

Filesize
588KB

Download
memory/1444-73-0x0000000002320000-0x0000000002623000-memory.dmp

Filesize
3.0MB

Download
memory/1444-68-0x0000000000000000-mapping.dmp

Download
memory/1444-71-0x0000000000A50000-0x0000000000A68000-memory.dmp

Filesize
96KB

Download
memory/1760-70-0x0000000000000000-mapping.dmp

Download
memory/1788-63-0x000000000041EAF0-mapping.dmp

Download
memory/1788-65-0x0000000000770000-0x0000000000A73000-memory.dmp

Filesize
3.0MB

Download
memory/1788-66-0x00000000002D0000-0x00000000002E4000-memory.dmp

Filesize
80KB

Download
memory/1788-64-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads