formbook | fc4a97c809b221101e5bd66497e1c058c8b33913c336a74183c7d7f7caedc803

General

Target

winlog.exe
Size

744KB
MD5

2e56ef2fbc6e9d6eacdef3c1551b4d07
SHA1

bca0cf7d4a30bb32a65091949bbfe5d93e087e31
SHA256

fc4a97c809b221101e5bd66497e1c058c8b33913c336a74183c7d7f7caedc803
SHA512

5d6477a99b0735161e28674b8746ae343a53190a1fb3733012bcdbeffbba5cc682f4ab13aede846729e63250551d0b229df927b4030f0dd209df0dea8b86a2f8

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.bytecommunication.com/aky/

Decoy

jeiksaoeklea.com

sagame-auto.net

soloseriolavoro.com

thecreatorsbook.com

superskritch.com

oroxequipment.com

heart-of-art.online

liwedfg.com

fisherofsouls.com

jota.xyz

nehyam.com

smart-contact-delivery.com

hoom.guru

dgryds.com

thesoakcpd.com

mishv.com

rings-factory.info

bero-craft-beers.com

podcastnamegenerators.com

856379813.xyz

Signatures

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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1080-7-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1080-8-0x000000000041EB60-mapping.dmp	formbook
behavioral1/memory/1340-9-0x0000000000000000-mapping.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1304 cmd.exe

pid	process
1304	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

winlog.exewinlog.exeNETSTAT.EXE

description	pid	process	target process
PID 1944 set thread context of 1080	1944	winlog.exe	winlog.exe
PID 1080 set thread context of 1236	1080	winlog.exe	Explorer.EXE
PID 1340 set thread context of 1236	1340	NETSTAT.EXE	Explorer.EXE

Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

NETSTAT.EXE

pid process

1340 NETSTAT.EXE

pid	process
1340	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

winlog.exeNETSTAT.EXE

pid	process
1080	winlog.exe
1080	winlog.exe
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE
1340	NETSTAT.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

winlog.exeNETSTAT.EXE

pid process

1080 winlog.exe
1080 winlog.exe
1080 winlog.exe
1340 NETSTAT.EXE
1340 NETSTAT.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

winlog.exeNETSTAT.EXE

description pid process

Token: SeDebugPrivilege 1080 winlog.exe
Token: SeDebugPrivilege 1340 NETSTAT.EXE
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE

pid	process
1236	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1080	winlog.exe
Token: SeDebugPrivilege	1340	NETSTAT.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

winlog.exeExplorer.EXENETSTAT.EXE

description	pid	process	target process
PID 1944 wrote to memory of 1080	1944	winlog.exe	winlog.exe
PID 1944 wrote to memory of 1080	1944	winlog.exe	winlog.exe
PID 1944 wrote to memory of 1080	1944	winlog.exe	winlog.exe
PID 1944 wrote to memory of 1080	1944	winlog.exe	winlog.exe
PID 1944 wrote to memory of 1080	1944	winlog.exe	winlog.exe
PID 1944 wrote to memory of 1080	1944	winlog.exe	winlog.exe
PID 1944 wrote to memory of 1080	1944	winlog.exe	winlog.exe
PID 1236 wrote to memory of 1340	1236	Explorer.EXE	NETSTAT.EXE
PID 1236 wrote to memory of 1340	1236	Explorer.EXE	NETSTAT.EXE
PID 1236 wrote to memory of 1340	1236	Explorer.EXE	NETSTAT.EXE
PID 1236 wrote to memory of 1340	1236	Explorer.EXE	NETSTAT.EXE
PID 1340 wrote to memory of 1304	1340	NETSTAT.EXE	cmd.exe
PID 1340 wrote to memory of 1304	1340	NETSTAT.EXE	cmd.exe
PID 1340 wrote to memory of 1304	1340	NETSTAT.EXE	cmd.exe
PID 1340 wrote to memory of 1304	1340	NETSTAT.EXE	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1236
- C:\Users\Admin\AppData\Local\Temp\winlog.exe
  "C:\Users\Admin\AppData\Local\Temp\winlog.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\Users\Admin\AppData\Local\Temp\winlog.exe
    "{path}"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1080
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:1804
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:1000
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:568
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:304
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:324
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:940
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:852
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:1608
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:280
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:1048
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:832
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:804
- C:\Windows\SysWOW64\NETSTAT.EXE
  "C:\Windows\SysWOW64\NETSTAT.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - Gathers network information
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1340
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\winlog.exe"
    3⤵
    - Deletes itself
    PID:1304

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1080-7-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1080-8-0x000000000041EB60-mapping.dmp

Download
memory/1304-11-0x0000000000000000-mapping.dmp

Download
memory/1340-9-0x0000000000000000-mapping.dmp

Download
memory/1340-10-0x0000000000590000-0x0000000000599000-memory.dmp

Filesize
36KB

Download
memory/1340-12-0x00000000032C0000-0x000000000340F000-memory.dmp

Filesize
1.3MB

Download
memory/1944-2-0x0000000074320000-0x0000000074A0E000-memory.dmp

Filesize
6.9MB

Download
memory/1944-3-0x0000000001030000-0x0000000001031000-memory.dmp

Filesize
4KB

Download
memory/1944-5-0x00000000005C0000-0x00000000005CE000-memory.dmp

Filesize
56KB

Download
memory/1944-6-0x00000000053A0000-0x0000000005423000-memory.dmp

Filesize
524KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads