formbook | 1d6d25f277b7ff1b9f7d7679afcbcc95e159aa22b7cb79e3afa3112c69b2436b

General

Target

2.exe
Size

476KB
MD5

51afc3df2bf79ca26430f80604c0640f
SHA1

fc8a3fc1151d29d9210735e50b104e0aff7c3d42
SHA256

162fdb36fbbaff1589c43a9d4ee712e15e8e123a562e569fcee28db30b756396
SHA512

f2985a20a6378911a3d094b2c99217bb602ac7730376ea3168c53a8214891664e9d17214a745bcc4590df8c16151414dffd6b9989431a0d6ce243ed06a4c744c
SSDEEP

12288:as+U+xV6HKilmSQ2RLrY0RYqxIik39A1GKZHNYPzodlDDy:asZ+GKiQZ2RvaqxIhA1GUKzodl

Score

10^/10

formbook ukj discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

ukj

Decoy

tengtenyusdaq.com

zukcoc.com

amazondronedeliveryservice.com

89building.com

dandiconsulting.com

kango-dream.com

amityexport.com

nguyenthiminhhai.com

sacredbridgepsychedelics.com

finalstepcleaningservice.com

glasgowmanwithvan.com

christopherkalaani.com

aureusgoldcorp.com

axion.fitness

tradeexportminingcorp.com

seekinward.com

amf218.com

abckidsmask.com

got-brains.info

richfoodlovers.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
behavioral1/memory/2436-11-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/2436-15-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
320	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2960 set thread context of 2436	2960	2.exe	30
PID 2436 set thread context of 1168	2436	2.exe	21
PID 1012 set thread context of 1168	1012	chkdsk.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	2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2436	2.exe
2436	2.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe
1012	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2436	2.exe
2436	2.exe
2436	2.exe
1012	chkdsk.exe
1012	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2436	2.exe
Token: SeDebugPrivilege	1012	chkdsk.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2960 wrote to memory of 2436	2960	2.exe	30
PID 2960 wrote to memory of 2436	2960	2.exe	30
PID 2960 wrote to memory of 2436	2960	2.exe	30
PID 2960 wrote to memory of 2436	2960	2.exe	30
PID 2960 wrote to memory of 2436	2960	2.exe	30
PID 2960 wrote to memory of 2436	2960	2.exe	30
PID 2960 wrote to memory of 2436	2960	2.exe	30
PID 1168 wrote to memory of 1012	1168	Explorer.EXE	31
PID 1168 wrote to memory of 1012	1168	Explorer.EXE	31
PID 1168 wrote to memory of 1012	1168	Explorer.EXE	31
PID 1168 wrote to memory of 1012	1168	Explorer.EXE	31
PID 1012 wrote to memory of 320	1012	chkdsk.exe	32
PID 1012 wrote to memory of 320	1012	chkdsk.exe	32
PID 1012 wrote to memory of 320	1012	chkdsk.exe	32
PID 1012 wrote to memory of 320	1012	chkdsk.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1168
- C:\Users\Admin\AppData\Local\Temp\2.exe
  "C:\Users\Admin\AppData\Local\Temp\2.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2960
- - C:\Users\Admin\AppData\Local\Temp\2.exe
    "{path}"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2436
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1012
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\2.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

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/1012-19-0x00000000002F0000-0x00000000002F7000-memory.dmp

Filesize
28KB

Download
memory/1012-18-0x00000000002F0000-0x00000000002F7000-memory.dmp

Filesize
28KB

Download
memory/1168-17-0x00000000051F0000-0x0000000005378000-memory.dmp

Filesize
1.5MB

Download
memory/1168-20-0x00000000051F0000-0x0000000005378000-memory.dmp

Filesize
1.5MB

Download
memory/2436-13-0x0000000000A10000-0x0000000000D13000-memory.dmp

Filesize
3.0MB

Download
memory/2436-15-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2436-16-0x0000000000290000-0x00000000002A4000-memory.dmp

Filesize
80KB

Download
memory/2436-8-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2436-11-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2436-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2436-7-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2960-12-0x00000000741C0000-0x00000000748AE000-memory.dmp

Filesize
6.9MB

Download
memory/2960-0-0x00000000741CE000-0x00000000741CF000-memory.dmp

Filesize
4KB

Download
memory/2960-6-0x00000000005D0000-0x0000000000630000-memory.dmp

Filesize
384KB

Download
memory/2960-5-0x00000000741C0000-0x00000000748AE000-memory.dmp

Filesize
6.9MB

Download
memory/2960-4-0x00000000741CE000-0x00000000741CF000-memory.dmp

Filesize
4KB

Download
memory/2960-3-0x00000000002E0000-0x00000000002FE000-memory.dmp

Filesize
120KB

Download
memory/2960-2-0x00000000741C0000-0x00000000748AE000-memory.dmp

Filesize
6.9MB

Download
memory/2960-1-0x0000000000990000-0x0000000000A0E000-memory.dmp

Filesize
504KB

Download

Analysis

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