formbook | c89c37f0b5dc89251da6c37aa8e1071c43d52c80fd2326f1e6de8dcd5eaf0dfc

General

Target

docs.exe
Size

723KB
MD5

136dcc6497b13fe87bbad4aa5f859593
SHA1

9da85420d2681d65df6757f44a0c8055ce6c1fba
SHA256

c89c37f0b5dc89251da6c37aa8e1071c43d52c80fd2326f1e6de8dcd5eaf0dfc
SHA512

5e842aa0858845c4322c847fd2497cfe515a2ed62e36337978a020c061d6555cb19dbac58c6c988a97d3bfd88de66bfc4a4e96bf1c46e78d94c2435051cd1c91
SSDEEP

12288:21ZF8Kz3TPb4DryC6L1+0rs/yo05u30HzdHpGo1UV60QFLZSkR:2yeyrUp1o/4HiV60sZh

Score

10^/10

formbook c24t discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

c24t

Decoy

ealthbridgeccs.online

ngelicais.art

uktuksu1.sbs

fapoker.asia

hecreature.tech

orenzoplaybest14.xyz

op-smartphones-deal.today

delark.click

7395.asia

otnews.cfd

j16e.xyz

oko.events

fscxb.top

roudtxliberals.vote

asas-br.bond

ourhealthyourlife.shop

fbpd.top

j9u9.xyz

uijiuw.top

aming-chair-37588.bond

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/2084-14-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2084-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2948-24-0x0000000000070000-0x000000000009F000-memory.dmp	formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2380	powershell.exe

Deletes itself 1 IoCs

pid	Process
328	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3004 set thread context of 2084	3004	docs.exe	33
PID 2084 set thread context of 1240	2084	docs.exe	21
PID 2948 set thread context of 1240	2948	cscript.exe	21

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	docs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cscript.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
3004	docs.exe
3004	docs.exe
2084	docs.exe
2084	docs.exe
2380	powershell.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe
2948	cscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2084	docs.exe
2084	docs.exe
2084	docs.exe
2948	cscript.exe
2948	cscript.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3004	docs.exe
Token: SeDebugPrivilege	2084	docs.exe
Token: SeDebugPrivilege	2380	powershell.exe
Token: SeDebugPrivilege	2948	cscript.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2380	3004	docs.exe	31
PID 3004 wrote to memory of 2380	3004	docs.exe	31
PID 3004 wrote to memory of 2380	3004	docs.exe	31
PID 3004 wrote to memory of 2380	3004	docs.exe	31
PID 3004 wrote to memory of 2084	3004	docs.exe	33
PID 3004 wrote to memory of 2084	3004	docs.exe	33
PID 3004 wrote to memory of 2084	3004	docs.exe	33
PID 3004 wrote to memory of 2084	3004	docs.exe	33
PID 3004 wrote to memory of 2084	3004	docs.exe	33
PID 3004 wrote to memory of 2084	3004	docs.exe	33
PID 3004 wrote to memory of 2084	3004	docs.exe	33
PID 1240 wrote to memory of 2948	1240	Explorer.EXE	37
PID 1240 wrote to memory of 2948	1240	Explorer.EXE	37
PID 1240 wrote to memory of 2948	1240	Explorer.EXE	37
PID 1240 wrote to memory of 2948	1240	Explorer.EXE	37
PID 2948 wrote to memory of 328	2948	cscript.exe	38
PID 2948 wrote to memory of 328	2948	cscript.exe	38
PID 2948 wrote to memory of 328	2948	cscript.exe	38
PID 2948 wrote to memory of 328	2948	cscript.exe	38

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1240
- C:\Users\Admin\AppData\Local\Temp\docs.exe
  "C:\Users\Admin\AppData\Local\Temp\docs.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3004
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\docs.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2380
- - C:\Users\Admin\AppData\Local\Temp\docs.exe
    "C:\Users\Admin\AppData\Local\Temp\docs.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2084
- C:\Windows\SysWOW64\autofmt.exe
  "C:\Windows\SysWOW64\autofmt.exe"
  2⤵
  PID:2748
- C:\Windows\SysWOW64\autofmt.exe
  "C:\Windows\SysWOW64\autofmt.exe"
  2⤵
  PID:2740
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:3012
- C:\Windows\SysWOW64\cscript.exe
  "C:\Windows\SysWOW64\cscript.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:2948
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\docs.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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/1240-25-0x0000000004F20000-0x0000000004FF3000-memory.dmp

Filesize
844KB

Download
memory/1240-20-0x0000000004F20000-0x0000000004FF3000-memory.dmp

Filesize
844KB

Download
memory/2084-15-0x0000000000D00000-0x0000000001003000-memory.dmp

Filesize
3.0MB

Download
memory/2084-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2084-18-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download
memory/2084-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2084-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2084-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2084-14-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2948-24-0x0000000000070000-0x000000000009F000-memory.dmp

Filesize
188KB

Download
memory/2948-23-0x0000000000930000-0x0000000000952000-memory.dmp

Filesize
136KB

Download
memory/3004-4-0x0000000074EAE000-0x0000000074EAF000-memory.dmp

Filesize
4KB

Download
memory/3004-19-0x0000000074EA0000-0x000000007558E000-memory.dmp

Filesize
6.9MB

Download
memory/3004-6-0x0000000000460000-0x00000000004D6000-memory.dmp

Filesize
472KB

Download
memory/3004-5-0x0000000074EA0000-0x000000007558E000-memory.dmp

Filesize
6.9MB

Download
memory/3004-0-0x0000000074EAE000-0x0000000074EAF000-memory.dmp

Filesize
4KB

Download
memory/3004-3-0x0000000000660000-0x000000000067E000-memory.dmp

Filesize
120KB

Download
memory/3004-2-0x0000000074EA0000-0x000000007558E000-memory.dmp

Filesize
6.9MB

Download
memory/3004-1-0x0000000000C40000-0x0000000000CF8000-memory.dmp

Filesize
736KB

Download

Analysis

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