formbook | b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c

General

Target

b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe
Size

273KB
MD5

0b50a75467d375b948edc7bcb6f01b60
SHA1

d9d70c204806b74acf34e95e44f5528031e777a6
SHA256

b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c
SHA512

267933362fd75201a23c33b075045f564871fe9a8ee3681a515ae1e5abb29686015274919a0db92a33b78d0cc0566bfffde47cd1906834ea912dc298cdc5c7ad

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

resource	yara_rule
behavioral1/memory/3064-116-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/3064-117-0x000000000041F0F0-mapping.dmp	formbook

Loads dropped DLL 1 IoCs

pid	Process
3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3716 set thread context of 3064	3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe	68

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 2 IoCs

pid	Process
3064	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe
3064	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3716 wrote to memory of 3064	3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe	68
PID 3716 wrote to memory of 3064	3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe	68
PID 3716 wrote to memory of 3064	3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe	68
PID 3716 wrote to memory of 3064	3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe	68
PID 3716 wrote to memory of 3064	3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe	68
PID 3716 wrote to memory of 3064	3716	b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe	68

C:\Users\Admin\AppData\Local\Temp\b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe
"C:\Users\Admin\AppData\Local\Temp\b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3716
- C:\Users\Admin\AppData\Local\Temp\b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe
  "C:\Users\Admin\AppData\Local\Temp\b13782a081582cd40a427da82c93035d3a59cd7dffea1e9b3f3821c55fde233c.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3064

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3064-116-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3064-118-0x0000000000A70000-0x0000000000D90000-memory.dmp

Filesize
3.1MB

Download

Analysis

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