formbook | 14d4d6df33e96af2a1d5ef8f8e7f6f1b914b0342b219c75f812848f52bc27628

General

Target

MEmpEng.exe
Size

604KB
MD5

dd2e0becfb1316c49975386fc3367c45
SHA1

98c578ff997ef781919ca5967251fa9d462a756e
SHA256

14d4d6df33e96af2a1d5ef8f8e7f6f1b914b0342b219c75f812848f52bc27628
SHA512

4768fa7aa32dc02e958c8506880311bb0d4fa5a9cd9fcdc6581a8349b1d85b3323513d28018b55ffbdb79e440e4b371dfb260cbd097ffd2279993b9a1a416bfb
SSDEEP

12288:MVVeXpcIofxcshf8R5wjY/nCdfpfwzW2kTFzcdppLLO:eePofZhf8BnCbft2kajy

Score

10^/10

formbook b48n discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

b48n

Decoy

anifestmindset.net

ommybahamabigsales.shop

3tcxr.xyz

iano-world.net

rconf23.net

atherpa.shop

trllrpartners.club

5sawit777.pro

ctbhuxcdreioijresol.top

opinatlas.app

pinstar.xyz

mfengwa.top

8games13.xyz

tickpaket.online

iphuodongallbbtbtm.top

ental-bridges-51593.bond

laywithkemon.rest

lkpiou.xyz

a88.land

igfloppafan.club

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/2888-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2888-18-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2800-23-0x0000000000130000-0x000000000015F000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
1812	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2500 set thread context of 2888	2500	MEmpEng.exe	32
PID 2888 set thread context of 1196	2888	MEmpEng.exe	21
PID 2800 set thread context of 1196	2800	NETSTAT.EXE	21

System Location Discovery: System Language Discovery 1 TTPs 3 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	MEmpEng.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
2800	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2500	MEmpEng.exe
2500	MEmpEng.exe
2888	MEmpEng.exe
2888	MEmpEng.exe
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE
2800	NETSTAT.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2888	MEmpEng.exe
2888	MEmpEng.exe
2888	MEmpEng.exe
2800	NETSTAT.EXE
2800	NETSTAT.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2500	MEmpEng.exe
Token: SeDebugPrivilege	2888	MEmpEng.exe
Token: SeDebugPrivilege	2800	NETSTAT.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 2084	2500	MEmpEng.exe	31
PID 2500 wrote to memory of 2084	2500	MEmpEng.exe	31
PID 2500 wrote to memory of 2084	2500	MEmpEng.exe	31
PID 2500 wrote to memory of 2084	2500	MEmpEng.exe	31
PID 2500 wrote to memory of 2888	2500	MEmpEng.exe	32
PID 2500 wrote to memory of 2888	2500	MEmpEng.exe	32
PID 2500 wrote to memory of 2888	2500	MEmpEng.exe	32
PID 2500 wrote to memory of 2888	2500	MEmpEng.exe	32
PID 2500 wrote to memory of 2888	2500	MEmpEng.exe	32
PID 2500 wrote to memory of 2888	2500	MEmpEng.exe	32
PID 2500 wrote to memory of 2888	2500	MEmpEng.exe	32
PID 1196 wrote to memory of 2800	1196	Explorer.EXE	33
PID 1196 wrote to memory of 2800	1196	Explorer.EXE	33
PID 1196 wrote to memory of 2800	1196	Explorer.EXE	33
PID 1196 wrote to memory of 2800	1196	Explorer.EXE	33
PID 2800 wrote to memory of 1812	2800	NETSTAT.EXE	34
PID 2800 wrote to memory of 1812	2800	NETSTAT.EXE	34
PID 2800 wrote to memory of 1812	2800	NETSTAT.EXE	34
PID 2800 wrote to memory of 1812	2800	NETSTAT.EXE	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
  "C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2500
- - C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
    "C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
    3⤵
    PID:2084
- - C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe
    "C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2888
- 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:2800
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\MEmpEng.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:1812

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

memory/1196-17-0x0000000003B50000-0x0000000003C50000-memory.dmp

Filesize
1024KB

Download
memory/1196-24-0x0000000005030000-0x00000000051A8000-memory.dmp

Filesize
1.5MB

Download
memory/1196-20-0x0000000005030000-0x00000000051A8000-memory.dmp

Filesize
1.5MB

Download
memory/2500-5-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2500-2-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2500-0-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/2500-6-0x0000000005050000-0x00000000050C6000-memory.dmp

Filesize
472KB

Download
memory/2500-1-0x00000000002B0000-0x000000000034C000-memory.dmp

Filesize
624KB

Download
memory/2500-14-0x0000000074410000-0x0000000074AFE000-memory.dmp

Filesize
6.9MB

Download
memory/2500-4-0x000000007441E000-0x000000007441F000-memory.dmp

Filesize
4KB

Download
memory/2500-3-0x00000000008C0000-0x00000000008D8000-memory.dmp

Filesize
96KB

Download
memory/2800-23-0x0000000000130000-0x000000000015F000-memory.dmp

Filesize
188KB

Download
memory/2800-22-0x00000000004F0000-0x00000000004F9000-memory.dmp

Filesize
36KB

Download
memory/2800-21-0x00000000004F0000-0x00000000004F9000-memory.dmp

Filesize
36KB

Download
memory/2888-15-0x00000000009E0000-0x0000000000CE3000-memory.dmp

Filesize
3.0MB

Download
memory/2888-19-0x0000000000280000-0x0000000000295000-memory.dmp

Filesize
84KB

Download
memory/2888-18-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2888-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2888-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2888-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2888-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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