formbook | dc5979d64d9ea41f929d14f4ca02dd29f5dac9c77b3e5584ad076d2f87b82704

General

Target

Doc 07232412.exe
Size

637KB
MD5

d44cbc7808ef4ca0e9007ed7812ac54c
SHA1

3562886c50d64e72079e0bad936c065027acb6f1
SHA256

eb9de075c6c5ac3dae5ec163fe9d8abeccf9edc3bdeed05364dcacf64c9550d2
SHA512

6c256b5c66177a5dee6bc769c8fa782834feefdc584beeb503f89e0cedbc23a88dd98976774f0839765efeb137b1a87ffb71ff36659e560777f33601340816f4
SSDEEP

12288:WdwwoIc0QIH2j0ocLX6NBxa3+SYOhAbp8FCTzcDxuN+wsv5/s2cxkOxW/t+BA:WywoIc0QIH2EiBcPQTTzIuN+vv5ixW/e

Score

10^/10

formbook by21 execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

by21

Decoy

digitalillusions.net

changeblue25.com

kitchenwoow.com

grupocontigoalimentacion.com

iranabr.com

embodiedmagic.com

superstoreszone.com

apartments-for-rent-46883.bond

kelbagnole.com

rideskratchlab.com

a06kng.club

saddlebredallstars.xyz

filepd.com

kxetdf.asia

dl39yy.com

jackedsearch.com

exodusprofessionaldetailing.com

ecommerce-40144.bond

uh3b94g3pyczi9t.skin

dcmcc635i.xyz

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/2864-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2864-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2768-23-0x00000000000F0000-0x000000000011F000-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
2844	powershell.exe

Deletes itself 1 IoCs

pid	Process
2652	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2084 set thread context of 2864	2084	Doc 07232412.exe	31
PID 2864 set thread context of 1384	2864	Doc 07232412.exe	20
PID 2768 set thread context of 1384	2768	cmstp.exe	20

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2864	Doc 07232412.exe
2864	Doc 07232412.exe
2844	powershell.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe
2768	cmstp.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2864	Doc 07232412.exe
2864	Doc 07232412.exe
2864	Doc 07232412.exe
2768	cmstp.exe
2768	cmstp.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2864	Doc 07232412.exe
Token: SeDebugPrivilege	2844	powershell.exe
Token: SeDebugPrivilege	2768	cmstp.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2844	2084	Doc 07232412.exe	29
PID 2084 wrote to memory of 2844	2084	Doc 07232412.exe	29
PID 2084 wrote to memory of 2844	2084	Doc 07232412.exe	29
PID 2084 wrote to memory of 2844	2084	Doc 07232412.exe	29
PID 2084 wrote to memory of 2864	2084	Doc 07232412.exe	31
PID 2084 wrote to memory of 2864	2084	Doc 07232412.exe	31
PID 2084 wrote to memory of 2864	2084	Doc 07232412.exe	31
PID 2084 wrote to memory of 2864	2084	Doc 07232412.exe	31
PID 2084 wrote to memory of 2864	2084	Doc 07232412.exe	31
PID 2084 wrote to memory of 2864	2084	Doc 07232412.exe	31
PID 2084 wrote to memory of 2864	2084	Doc 07232412.exe	31
PID 1384 wrote to memory of 2768	1384	Explorer.EXE	32
PID 1384 wrote to memory of 2768	1384	Explorer.EXE	32
PID 1384 wrote to memory of 2768	1384	Explorer.EXE	32
PID 1384 wrote to memory of 2768	1384	Explorer.EXE	32
PID 1384 wrote to memory of 2768	1384	Explorer.EXE	32
PID 1384 wrote to memory of 2768	1384	Explorer.EXE	32
PID 1384 wrote to memory of 2768	1384	Explorer.EXE	32
PID 2768 wrote to memory of 2652	2768	cmstp.exe	33
PID 2768 wrote to memory of 2652	2768	cmstp.exe	33
PID 2768 wrote to memory of 2652	2768	cmstp.exe	33
PID 2768 wrote to memory of 2652	2768	cmstp.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Users\Admin\AppData\Local\Temp\Doc 07232412.exe
  "C:\Users\Admin\AppData\Local\Temp\Doc 07232412.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2084
- - 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\Doc 07232412.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2844
- - C:\Users\Admin\AppData\Local\Temp\Doc 07232412.exe
    "C:\Users\Admin\AppData\Local\Temp\Doc 07232412.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2864
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2768
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Doc 07232412.exe"
    3⤵
    - Deletes itself
    PID:2652

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1384-19-0x0000000004150000-0x0000000004239000-memory.dmp

Filesize
932KB

Download
memory/1384-27-0x0000000004150000-0x0000000004239000-memory.dmp

Filesize
932KB

Download
memory/2084-1-0x0000000000AF0000-0x0000000000B96000-memory.dmp

Filesize
664KB

Download
memory/2084-2-0x0000000074770000-0x0000000074E5E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-3-0x0000000000250000-0x0000000000264000-memory.dmp

Filesize
80KB

Download
memory/2084-4-0x00000000004B0000-0x00000000004BA000-memory.dmp

Filesize
40KB

Download
memory/2084-5-0x00000000004C0000-0x00000000004CE000-memory.dmp

Filesize
56KB

Download
memory/2084-6-0x0000000004670000-0x00000000046E6000-memory.dmp

Filesize
472KB

Download
memory/2084-0-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/2084-14-0x0000000074770000-0x0000000074E5E000-memory.dmp

Filesize
6.9MB

Download
memory/2768-23-0x00000000000F0000-0x000000000011F000-memory.dmp

Filesize
188KB

Download
memory/2768-22-0x0000000000EC0000-0x0000000000ED8000-memory.dmp

Filesize
96KB

Download
memory/2864-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2864-18-0x00000000001A0000-0x00000000001B4000-memory.dmp

Filesize
80KB

Download
memory/2864-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2864-15-0x0000000000BA0000-0x0000000000EA3000-memory.dmp

Filesize
3.0MB

Download
memory/2864-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2864-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2864-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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