formbook | 9f59a9c7a38d8031c5b0829da6c4c10951b1de67adada4f567449d4b6ea8d83c

General

Target

c052190b60d83304962baa2f4381ee06.exe
Size

246KB
MD5

c052190b60d83304962baa2f4381ee06
SHA1

1b9be49206b5c9c88847ba83ff4971902ff033b9
SHA256

9f59a9c7a38d8031c5b0829da6c4c10951b1de67adada4f567449d4b6ea8d83c
SHA512

04d5f431c75292820305470e1dbc16f08b3644583a24ad8c92a8a66b91f622a12dc514eb55dda52aa34248cb92460f43c939dc2d40c50ebe96a8f7abac2ec26c

Score

10^/10

formbook nk6l rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

nk6l

C2

http://www.rthearts.com/nk6l/

Decoy

cbnextra.com

entitysystemsinc.com

55midwoodave.com

ebelizzi.com

khojcity.com

1527brokenoakdrive.site

housinghproperties.com

ratiousa.com

lrcrepresentacoes.net

tocoec.net

khadamatdemnate.com

davidkastner.xyz

gardeniaresort.com

qiantangguoji.com

visaprepaidprocessinq.com

cristinamadara.com

semapisus.xyz

mpwebagency.net

alibabasdeli.com

gigasupplies.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/596-55-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/596-56-0x000000000041F0F0-mapping.dmp	formbook

Loads dropped DLL 1 IoCs

Processes:

c052190b60d83304962baa2f4381ee06.exe

pid process

1556 c052190b60d83304962baa2f4381ee06.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

c052190b60d83304962baa2f4381ee06.exe

description pid process target process

PID 1556 set thread context of 596 1556 c052190b60d83304962baa2f4381ee06.exe c052190b60d83304962baa2f4381ee06.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 1 IoCs

Processes:

c052190b60d83304962baa2f4381ee06.exe

pid process

596 c052190b60d83304962baa2f4381ee06.exe

pid	process
1556	c052190b60d83304962baa2f4381ee06.exe

description	pid	process	target process
PID 1556 set thread context of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe

pid	process
596	c052190b60d83304962baa2f4381ee06.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

c052190b60d83304962baa2f4381ee06.exe

description	pid	process	target process
PID 1556 wrote to memory of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe
PID 1556 wrote to memory of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe
PID 1556 wrote to memory of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe
PID 1556 wrote to memory of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe
PID 1556 wrote to memory of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe
PID 1556 wrote to memory of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe
PID 1556 wrote to memory of 596	1556	c052190b60d83304962baa2f4381ee06.exe	c052190b60d83304962baa2f4381ee06.exe

C:\Users\Admin\AppData\Local\Temp\c052190b60d83304962baa2f4381ee06.exe
"C:\Users\Admin\AppData\Local\Temp\c052190b60d83304962baa2f4381ee06.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1556

C:\Users\Admin\AppData\Local\Temp\c052190b60d83304962baa2f4381ee06.exe
"C:\Users\Admin\AppData\Local\Temp\c052190b60d83304962baa2f4381ee06.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:596

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

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\nstB81A.tmp\pjzghir.dll
MD5
42913016238730a9aed1e2246f26e944

SHA1
23af57bdd8fcef04ff222d4945a92e27685e0f53

SHA256
0e379293c9b084834bbc33561278ec9c8df126ba38e99f79640d5e76a7838745

SHA512
86c5b94353a6bfa0c7a5a519af32ec198c48da8f12244cbca71091033e47b56f17267d73d5d2192cb34fef1005061ee3e4e4c1f508c3dd3748a22415f15bed32

Download Submit
memory/596-55-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/596-56-0x000000000041F0F0-mapping.dmp

Download
memory/596-57-0x0000000000700000-0x0000000000A03000-memory.dmp

Filesize
3.0MB

Download
memory/1556-53-0x00000000757B1000-0x00000000757B3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing