formbook | fef0d0e16559f3c10c8a414b00433d165f132b4444ddc2a7033ab7a2e1bb7604

General

Target

RFQ 2411001.exe
Size

692KB
MD5

a4141cc2bdd9f0d2384da197fa0d7fc8
SHA1

81c10a379abde1a806828a649592e7fa21e5f8fb
SHA256

fef0d0e16559f3c10c8a414b00433d165f132b4444ddc2a7033ab7a2e1bb7604
SHA512

4cdf9bc063aa112a9079df7dc4d08784fd1e42c4d20a4000f55e951aadaf08115ae6a1f7a51fa8f77b036b4773b8d6f4940cd0ee8c9e77486017d13929c6a6f4
SSDEEP

12288:yLc6LweloldgJ4gD8sL0TPPuiUspz11KZt0P8x7qXZlpoqMu4UXL3LgkR:yJLweKdxg4C0zPrrpz1yUM0ht4UXjT

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/2128-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2128-20-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2948-22-0x0000000000080000-0x00000000000AF000-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
2196	powershell.exe

Deletes itself 1 IoCs

pid	Process
2920	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2340 set thread context of 2128	2340	RFQ 2411001.exe	34
PID 2128 set thread context of 1256	2128	RFQ 2411001.exe	21
PID 2948 set thread context of 1256	2948	chkdsk.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	RFQ 2411001.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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 34 IoCs

pid	Process
2340	RFQ 2411001.exe
2340	RFQ 2411001.exe
2340	RFQ 2411001.exe
2340	RFQ 2411001.exe
2128	RFQ 2411001.exe
2128	RFQ 2411001.exe
2196	powershell.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe
2948	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2128	RFQ 2411001.exe
2128	RFQ 2411001.exe
2128	RFQ 2411001.exe
2948	chkdsk.exe
2948	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2340	RFQ 2411001.exe
Token: SeDebugPrivilege	2128	RFQ 2411001.exe
Token: SeDebugPrivilege	2196	powershell.exe
Token: SeDebugPrivilege	2948	chkdsk.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 2196	2340	RFQ 2411001.exe	31
PID 2340 wrote to memory of 2196	2340	RFQ 2411001.exe	31
PID 2340 wrote to memory of 2196	2340	RFQ 2411001.exe	31
PID 2340 wrote to memory of 2196	2340	RFQ 2411001.exe	31
PID 2340 wrote to memory of 1656	2340	RFQ 2411001.exe	33
PID 2340 wrote to memory of 1656	2340	RFQ 2411001.exe	33
PID 2340 wrote to memory of 1656	2340	RFQ 2411001.exe	33
PID 2340 wrote to memory of 1656	2340	RFQ 2411001.exe	33
PID 2340 wrote to memory of 2128	2340	RFQ 2411001.exe	34
PID 2340 wrote to memory of 2128	2340	RFQ 2411001.exe	34
PID 2340 wrote to memory of 2128	2340	RFQ 2411001.exe	34
PID 2340 wrote to memory of 2128	2340	RFQ 2411001.exe	34
PID 2340 wrote to memory of 2128	2340	RFQ 2411001.exe	34
PID 2340 wrote to memory of 2128	2340	RFQ 2411001.exe	34
PID 2340 wrote to memory of 2128	2340	RFQ 2411001.exe	34
PID 1256 wrote to memory of 2948	1256	Explorer.EXE	35
PID 1256 wrote to memory of 2948	1256	Explorer.EXE	35
PID 1256 wrote to memory of 2948	1256	Explorer.EXE	35
PID 1256 wrote to memory of 2948	1256	Explorer.EXE	35
PID 2948 wrote to memory of 2920	2948	chkdsk.exe	36
PID 2948 wrote to memory of 2920	2948	chkdsk.exe	36
PID 2948 wrote to memory of 2920	2948	chkdsk.exe	36
PID 2948 wrote to memory of 2920	2948	chkdsk.exe	36

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1256
- C:\Users\Admin\AppData\Local\Temp\RFQ 2411001.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ 2411001.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2340
- - 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\RFQ 2411001.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2196
- - C:\Users\Admin\AppData\Local\Temp\RFQ 2411001.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ 2411001.exe"
    3⤵
    PID:1656
- - C:\Users\Admin\AppData\Local\Temp\RFQ 2411001.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ 2411001.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2128
- 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:2948
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\RFQ 2411001.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2920

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

Query Registry

1

T1012

System Information Discovery

2

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/1256-18-0x0000000000010000-0x0000000000020000-memory.dmp

Filesize
64KB

Download
memory/1256-23-0x0000000000010000-0x0000000000020000-memory.dmp

Filesize
64KB

Download
memory/2128-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2128-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2128-20-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2128-16-0x0000000000950000-0x0000000000C53000-memory.dmp

Filesize
3.0MB

Download
memory/2128-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2128-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2340-6-0x0000000004450000-0x00000000044C6000-memory.dmp

Filesize
472KB

Download
memory/2340-0-0x000000007470E000-0x000000007470F000-memory.dmp

Filesize
4KB

Download
memory/2340-3-0x00000000004D0000-0x00000000004EA000-memory.dmp

Filesize
104KB

Download
memory/2340-5-0x0000000074700000-0x0000000074DEE000-memory.dmp

Filesize
6.9MB

Download
memory/2340-2-0x0000000074700000-0x0000000074DEE000-memory.dmp

Filesize
6.9MB

Download
memory/2340-19-0x0000000074700000-0x0000000074DEE000-memory.dmp

Filesize
6.9MB

Download
memory/2340-4-0x000000007470E000-0x000000007470F000-memory.dmp

Filesize
4KB

Download
memory/2340-1-0x0000000000ED0000-0x0000000000F7E000-memory.dmp

Filesize
696KB

Download
memory/2948-21-0x00000000009B0000-0x00000000009B7000-memory.dmp

Filesize
28KB

Download
memory/2948-22-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download

Analysis

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