formbook | c9c59fa60cf5a7f25c540b5bbfabe5b0f7fe69e45e3fb45c9de6fef1b9223f53

General

Target

$PLUGINSDIR/jk2l8e.dll
Size

192KB
MD5

b8f29f375c72c72726a9e6fe2c248bab
SHA1

5e26da3c3611d123e3411e13b6922fd91093198d
SHA256

9a9393c13b7acaa49425ea582746c4ce3ac1344dea406729a3929a6c77c56929
SHA512

366b276d7810fd1652b6d1e1dc1bb73dd24be4a8cb668f91c1d77d7891cb1eedf0ca2bab5ffae3f51ddc895e1ea52ef06fc03de539deecf21b2a421f6a9e9d73
SSDEEP

3072:L1UTRSZGMM9jNWI/+xHxoc1AvbDGmxOJydH1ftnYZm0Hbk/b9Sia+i57AO0Ukxa1:RUUGMMxNWI/yRrAvbAydH1ftnYJbkjsp

Score

10^/10

formbook tba discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

tba

Decoy

dzmcos.com

northlandautocenterfargo.com

today2check.com

izoozstudios.com

happyhodgkins.com

allzoy.com

805isaac.com

247likeaboss.com

guxsdesign.com

olenfex.com

roadsignsaroundtheworld.com

bleedingedgealpha.com

aladdinperu.com

skip2-kansd.com

todpod.club

theslicee.com

hbhnfs.com

jkrso.com

presgram.com

vedmaths.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral5/memory/1924-1-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral5/memory/1924-5-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2364 set thread context of 1924	2364	rundll32.exe	31
PID 1924 set thread context of 1204	1924	rundll32.exe	21
PID 320 set thread context of 1204	320	help.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	help.exe

Suspicious behavior: EnumeratesProcesses 35 IoCs

pid	Process
2364	rundll32.exe
2364	rundll32.exe
2364	rundll32.exe
2364	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe
320	help.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2364	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
320	help.exe
320	help.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1924	rundll32.exe
Token: SeDebugPrivilege	320	help.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 2364	2404	rundll32.exe	30
PID 2404 wrote to memory of 2364	2404	rundll32.exe	30
PID 2404 wrote to memory of 2364	2404	rundll32.exe	30
PID 2404 wrote to memory of 2364	2404	rundll32.exe	30
PID 2404 wrote to memory of 2364	2404	rundll32.exe	30
PID 2404 wrote to memory of 2364	2404	rundll32.exe	30
PID 2404 wrote to memory of 2364	2404	rundll32.exe	30
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 2364 wrote to memory of 1924	2364	rundll32.exe	31
PID 1204 wrote to memory of 320	1204	Explorer.EXE	32
PID 1204 wrote to memory of 320	1204	Explorer.EXE	32
PID 1204 wrote to memory of 320	1204	Explorer.EXE	32
PID 1204 wrote to memory of 320	1204	Explorer.EXE	32
PID 320 wrote to memory of 2888	320	help.exe	34
PID 320 wrote to memory of 2888	320	help.exe	34
PID 320 wrote to memory of 2888	320	help.exe	34
PID 320 wrote to memory of 2888	320	help.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\jk2l8e.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2404
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\jk2l8e.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2364
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\jk2l8e.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:1924
- C:\Windows\SysWOW64\help.exe
  "C:\Windows\SysWOW64\help.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:320
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2888

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

Loading Replay Monitor...

Downloads

memory/320-9-0x0000000000180000-0x0000000000186000-memory.dmp

Filesize
24KB

Download
memory/320-8-0x0000000000180000-0x0000000000186000-memory.dmp

Filesize
24KB

Download
memory/1204-7-0x00000000041E0000-0x00000000042EF000-memory.dmp

Filesize
1.1MB

Download
memory/1204-10-0x00000000041E0000-0x00000000042EF000-memory.dmp

Filesize
1.1MB

Download
memory/1924-1-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1924-3-0x0000000002170000-0x0000000002473000-memory.dmp

Filesize
3.0MB

Download
memory/1924-6-0x00000000001F0000-0x0000000000204000-memory.dmp

Filesize
80KB

Download
memory/1924-5-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2364-0-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/2364-2-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing