formbook | cea476506bdbb5781b4fc674b15a0d15c1be4e7459a0b0bdd7132e1d406a226e

General

Target

Payment_Advice pdf.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/2820-22-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2820-25-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2744-32-0x00000000000D0000-0x00000000000FF000-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
2568	reindulgence.exe

Loads dropped DLL 1 IoCs

pid	Process
2604	Payment_Advice pdf.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0007000000018712-8.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2568 set thread context of 2820	2568	reindulgence.exe	31
PID 2820 set thread context of 1196	2820	svchost.exe	21
PID 2744 set thread context of 1196	2744	wuapp.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Payment_Advice pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reindulgence.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wuapp.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2820	svchost.exe
2820	svchost.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe
2744	wuapp.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2568	reindulgence.exe
2820	svchost.exe
2820	svchost.exe
2820	svchost.exe
2744	wuapp.exe
2744	wuapp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	svchost.exe
Token: SeDebugPrivilege	2744	wuapp.exe

Suspicious use of FindShellTrayWindow 6 IoCs

pid	Process
2604	Payment_Advice pdf.exe
2604	Payment_Advice pdf.exe
2568	reindulgence.exe
2568	reindulgence.exe
1196	Explorer.EXE
1196	Explorer.EXE

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2604	Payment_Advice pdf.exe
2604	Payment_Advice pdf.exe
2568	reindulgence.exe
2568	reindulgence.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 2568	2604	Payment_Advice pdf.exe	30
PID 2604 wrote to memory of 2568	2604	Payment_Advice pdf.exe	30
PID 2604 wrote to memory of 2568	2604	Payment_Advice pdf.exe	30
PID 2604 wrote to memory of 2568	2604	Payment_Advice pdf.exe	30
PID 2568 wrote to memory of 2820	2568	reindulgence.exe	31
PID 2568 wrote to memory of 2820	2568	reindulgence.exe	31
PID 2568 wrote to memory of 2820	2568	reindulgence.exe	31
PID 2568 wrote to memory of 2820	2568	reindulgence.exe	31
PID 2568 wrote to memory of 2820	2568	reindulgence.exe	31
PID 1196 wrote to memory of 2744	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2744	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2744	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2744	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2744	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2744	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2744	1196	Explorer.EXE	32
PID 2744 wrote to memory of 2556	2744	wuapp.exe	33
PID 2744 wrote to memory of 2556	2744	wuapp.exe	33
PID 2744 wrote to memory of 2556	2744	wuapp.exe	33
PID 2744 wrote to memory of 2556	2744	wuapp.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Users\Admin\AppData\Local\Temp\Payment_Advice pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Payment_Advice pdf.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2604
- - C:\Users\Admin\AppData\Local\lustring\reindulgence.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment_Advice pdf.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:2568
  - - C:\Windows\SysWOW64\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\Payment_Advice pdf.exe"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2820
- C:\Windows\SysWOW64\wuapp.exe
  "C:\Windows\SysWOW64\wuapp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2744
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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/1196-42-0x00000000066E0000-0x00000000067E5000-memory.dmp

Filesize
1.0MB

Download
memory/1196-40-0x00000000066E0000-0x00000000067E5000-memory.dmp

Filesize
1.0MB

Download
memory/1196-39-0x00000000066E0000-0x00000000067E5000-memory.dmp

Filesize
1.0MB

Download
memory/1196-33-0x0000000004C40000-0x0000000004CFE000-memory.dmp

Filesize
760KB

Download
memory/1196-27-0x0000000003E40000-0x0000000004040000-memory.dmp

Filesize
2.0MB

Download
memory/1196-28-0x0000000004C40000-0x0000000004CFE000-memory.dmp

Filesize
760KB

Download
memory/2568-20-0x00000000008D0000-0x0000000000CD0000-memory.dmp

Filesize
4.0MB

Download
memory/2604-6-0x00000000009B0000-0x0000000000DB0000-memory.dmp

Filesize
4.0MB

Download
memory/2744-32-0x00000000000D0000-0x00000000000FF000-memory.dmp

Filesize
188KB

Download
memory/2744-29-0x0000000001110000-0x000000000111B000-memory.dmp

Filesize
44KB

Download
memory/2744-31-0x0000000001110000-0x000000000111B000-memory.dmp

Filesize
44KB

Download
memory/2820-25-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2820-26-0x00000000001E0000-0x00000000001F4000-memory.dmp

Filesize
80KB

Download
memory/2820-23-0x0000000000910000-0x0000000000C13000-memory.dmp

Filesize
3.0MB

Download
memory/2820-22-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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