formbook | cea476506bdbb5781b4fc674b15a0d15c1be4e7459a0b0bdd7132e1d406a226e

General

Target

PaymentAdvicepdf.exe
Size

1.2MB
MD5

6cf9d0cd325beeb461dbe39c74483686
SHA1

71792078df265b5aef884d7f3710a24d11088262
SHA256

cea476506bdbb5781b4fc674b15a0d15c1be4e7459a0b0bdd7132e1d406a226e
SHA512

4ec448183d6c49c82e4086b8a1a3a7d0118ee10e420615cf58a3eaa5097a15c5903d3614616634cc692172a75f6982448263b159e252a84a2a4e426cc2e72f8e
SSDEEP

24576:PCdxte/80jYLT3U1jfsWa32BvSTGU7hHtQ:Ow80cTsjkWa3e69c

Score

10^/10

formbook k94g discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

k94g

Decoy

nstandgoz.xyz

dhd-treatment-37310.bond

13s-braces-us-ze.fun

umdona.shop

96ph803ql.bond

kka9max.net

corporate-10.xyz

edicalassistance869840.online

lobalresources-bh.xyz

3145978.xyz

ovdaawebsite.online

etting-thailand.net

icloud.xyz

poxk.shop

25ks-ls72510.cyou

women.info

iwyrfbfvhv9.asia

luratu.xyz

ffordable-power-charger.today

edanuryilmaz.xyz

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2904-22-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2904-26-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2376-31-0x0000000000150000-0x000000000017F000-memory.dmp	formbook

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\reindulgence.vbs	reindulgence.exe

Executes dropped EXE 1 IoCs

pid	Process
2232	reindulgence.exe

Loads dropped DLL 1 IoCs

pid	Process
2236	PaymentAdvicepdf.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x00070000000190ce-8.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2232 set thread context of 2904	2232	reindulgence.exe	32
PID 2904 set thread context of 1236	2904	svchost.exe	21
PID 2376 set thread context of 1236	2376	NETSTAT.EXE	21

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PaymentAdvicepdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reindulgence.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NETSTAT.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2376	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2904	svchost.exe
2904	svchost.exe
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE
2376	NETSTAT.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2232	reindulgence.exe
2904	svchost.exe
2904	svchost.exe
2904	svchost.exe
2376	NETSTAT.EXE
2376	NETSTAT.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	svchost.exe
Token: SeDebugPrivilege	2376	NETSTAT.EXE

Suspicious use of FindShellTrayWindow 6 IoCs

pid	Process
2236	PaymentAdvicepdf.exe
2236	PaymentAdvicepdf.exe
2232	reindulgence.exe
2232	reindulgence.exe
1236	Explorer.EXE
1236	Explorer.EXE

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2236	PaymentAdvicepdf.exe
2236	PaymentAdvicepdf.exe
2232	reindulgence.exe
2232	reindulgence.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2232	2236	PaymentAdvicepdf.exe	31
PID 2236 wrote to memory of 2232	2236	PaymentAdvicepdf.exe	31
PID 2236 wrote to memory of 2232	2236	PaymentAdvicepdf.exe	31
PID 2236 wrote to memory of 2232	2236	PaymentAdvicepdf.exe	31
PID 2232 wrote to memory of 2904	2232	reindulgence.exe	32
PID 2232 wrote to memory of 2904	2232	reindulgence.exe	32
PID 2232 wrote to memory of 2904	2232	reindulgence.exe	32
PID 2232 wrote to memory of 2904	2232	reindulgence.exe	32
PID 2232 wrote to memory of 2904	2232	reindulgence.exe	32
PID 1236 wrote to memory of 2376	1236	Explorer.EXE	33
PID 1236 wrote to memory of 2376	1236	Explorer.EXE	33
PID 1236 wrote to memory of 2376	1236	Explorer.EXE	33
PID 1236 wrote to memory of 2376	1236	Explorer.EXE	33
PID 2376 wrote to memory of 2896	2376	NETSTAT.EXE	34
PID 2376 wrote to memory of 2896	2376	NETSTAT.EXE	34
PID 2376 wrote to memory of 2896	2376	NETSTAT.EXE	34
PID 2376 wrote to memory of 2896	2376	NETSTAT.EXE	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1236
- C:\Users\Admin\AppData\Local\Temp\PaymentAdvicepdf.exe
  "C:\Users\Admin\AppData\Local\Temp\PaymentAdvicepdf.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2236
- - C:\Users\Admin\AppData\Local\lustring\reindulgence.exe
    "C:\Users\Admin\AppData\Local\Temp\PaymentAdvicepdf.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:2232
  - - C:\Windows\SysWOW64\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\PaymentAdvicepdf.exe"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2904
- C:\Windows\SysWOW64\NETSTAT.EXE
  "C:\Windows\SysWOW64\NETSTAT.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Gathers network information
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2896

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\lustring\reindulgence.exe

Filesize
1.2MB

MD5
6cf9d0cd325beeb461dbe39c74483686

SHA1
71792078df265b5aef884d7f3710a24d11088262

SHA256
cea476506bdbb5781b4fc674b15a0d15c1be4e7459a0b0bdd7132e1d406a226e

SHA512
4ec448183d6c49c82e4086b8a1a3a7d0118ee10e420615cf58a3eaa5097a15c5903d3614616634cc692172a75f6982448263b159e252a84a2a4e426cc2e72f8e

Download Submit
memory/1236-41-0x0000000004500000-0x00000000045A9000-memory.dmp

Filesize
676KB

Download
memory/1236-39-0x0000000004500000-0x00000000045A9000-memory.dmp

Filesize
676KB

Download
memory/1236-38-0x0000000004500000-0x00000000045A9000-memory.dmp

Filesize
676KB

Download
memory/1236-32-0x0000000006C50000-0x0000000006DDE000-memory.dmp

Filesize
1.6MB

Download
memory/1236-28-0x0000000006C50000-0x0000000006DDE000-memory.dmp

Filesize
1.6MB

Download
memory/1236-25-0x0000000003120000-0x0000000003220000-memory.dmp

Filesize
1024KB

Download
memory/2232-20-0x0000000000B00000-0x0000000000F00000-memory.dmp

Filesize
4.0MB

Download
memory/2236-6-0x0000000000610000-0x0000000000A10000-memory.dmp

Filesize
4.0MB

Download
memory/2376-31-0x0000000000150000-0x000000000017F000-memory.dmp

Filesize
188KB

Download
memory/2376-30-0x0000000000140000-0x0000000000149000-memory.dmp

Filesize
36KB

Download
memory/2376-29-0x0000000000140000-0x0000000000149000-memory.dmp

Filesize
36KB

Download
memory/2904-26-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2904-27-0x00000000001E0000-0x00000000001F4000-memory.dmp

Filesize
80KB

Download
memory/2904-23-0x0000000000700000-0x0000000000A03000-memory.dmp

Filesize
3.0MB

Download
memory/2904-22-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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