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
behavioral2/memory/2600-117-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/3300-125-0x0000000002DC0000-0x0000000002DEE000-memory.dmp	formbook

Loads dropped DLL 1 IoCs

Processes:

original documents.exe

pid process

4044 original documents.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

original documents.exeoriginal documents.execmmon32.exe

description	pid	process	target process
PID 4044 set thread context of 2600	4044	original documents.exe	original documents.exe
PID 2600 set thread context of 2764	2600	original documents.exe	Explorer.EXE
PID 2600 set thread context of 2764	2600	original documents.exe	Explorer.EXE
PID 3300 set thread context of 2764	3300	cmmon32.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 60 IoCs

Processes:

original documents.execmmon32.exe

pid	process
2600	original documents.exe
2600	original documents.exe
2600	original documents.exe
2600	original documents.exe
2600	original documents.exe
2600	original documents.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe
3300	cmmon32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2764 Explorer.EXE

pid	process
2764	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

original documents.exeoriginal documents.execmmon32.exe

pid	process
4044	original documents.exe
2600	original documents.exe
2600	original documents.exe
2600	original documents.exe
2600	original documents.exe
3300	cmmon32.exe
3300	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

original documents.execmmon32.exe

description pid process

Token: SeDebugPrivilege 2600 original documents.exe
Token: SeDebugPrivilege 3300 cmmon32.exe
Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid process

2764 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	2600	original documents.exe
Token: SeDebugPrivilege	3300	cmmon32.exe

pid	process
2764	Explorer.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

original documents.exeExplorer.EXEcmmon32.exe

description	pid	process	target process
PID 4044 wrote to memory of 2600	4044	original documents.exe	original documents.exe
PID 4044 wrote to memory of 2600	4044	original documents.exe	original documents.exe
PID 4044 wrote to memory of 2600	4044	original documents.exe	original documents.exe
PID 4044 wrote to memory of 2600	4044	original documents.exe	original documents.exe
PID 2764 wrote to memory of 3300	2764	Explorer.EXE	cmmon32.exe
PID 2764 wrote to memory of 3300	2764	Explorer.EXE	cmmon32.exe
PID 2764 wrote to memory of 3300	2764	Explorer.EXE	cmmon32.exe
PID 3300 wrote to memory of 1872	3300	cmmon32.exe	cmd.exe
PID 3300 wrote to memory of 1872	3300	cmmon32.exe	cmd.exe
PID 3300 wrote to memory of 1872	3300	cmmon32.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2764

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:4044

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:2600

C:\Windows\SysWOW64\cmmon32.exe
"C:\Windows\SysWOW64\cmmon32.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3300

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\original documents.exe"
3⤵
PID:1872

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsg17A6.tmp\udsdj.dll
MD5
053a82ea7d71e4171457a5be63c908f1

SHA1
15e4581e70de1535ba38ce5f2a7644d46dd8a1d9

SHA256
ece3f18788154b249625d589c5e1101ed54a07f4ed09c8b8b9076c6fddf34922

SHA512
2f850ddb917ebb8ca02c9954d879b77df16c1b6c88278ccd62b537d6f27a7dc767b6ccb433177ede4e347599e6399e0084332d15605e06cb6a5cd642af7e8223

Download Submit
memory/1872-127-0x0000000000000000-mapping.dmp

Download
memory/2600-121-0x0000000000A20000-0x0000000000A34000-memory.dmp

Filesize
80KB

Download
memory/2600-116-0x000000000041EAF0-mapping.dmp

Download
memory/2600-117-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2600-118-0x0000000000AA0000-0x0000000000DC0000-memory.dmp

Filesize
3.1MB

Download
memory/2600-119-0x00000000009E0000-0x00000000009F4000-memory.dmp

Filesize
80KB

Download
memory/2764-122-0x0000000004E50000-0x0000000004FA0000-memory.dmp

Filesize
1.3MB

Download
memory/2764-120-0x0000000004CF0000-0x0000000004E50000-memory.dmp

Filesize
1.4MB

Download
memory/2764-129-0x0000000006770000-0x00000000068CB000-memory.dmp

Filesize
1.4MB

Download
memory/3300-123-0x0000000000000000-mapping.dmp

Download
memory/3300-124-0x0000000000AE0000-0x0000000000AEC000-memory.dmp

Filesize
48KB

Download
memory/3300-125-0x0000000002DC0000-0x0000000002DEE000-memory.dmp

Filesize
184KB

Download
memory/3300-126-0x0000000004F40000-0x0000000005260000-memory.dmp

Filesize
3.1MB

Download
memory/3300-128-0x0000000004C00000-0x0000000004C93000-memory.dmp

Filesize
588KB

Download
memory/4044-115-0x0000000002FE0000-0x0000000003003000-memory.dmp

Filesize
140KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads