formbook | 27ffa4783191b2211f9f11043cdfb2df12898202cbef969013082c7634b2f27b

Analysis

max time kernel
149s
max time network
117s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03/02/2025, 10:00

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General

Target

PaidInvoicePdf.exe
Size

696KB
MD5

800ffdb94a4c823184385509daf24178
SHA1

42269e47c7bd0e0e71ebcddeffa9e8f7fd87dc69
SHA256

27ffa4783191b2211f9f11043cdfb2df12898202cbef969013082c7634b2f27b
SHA512

dc11235024197202e9a00059ca5660e09537ac7a6411fc6098ce34f5715b95254a52147231e41e74ae141ee74b8bf9fe3c7b497c8b99ee0697a1f38037fa5c4d
SSDEEP

12288:PYGjdswecl94lQ40JfOofko3QSkQREOyMh344m/xDX/ch:2wedlWOofqSkwKcIrPch

Score

10^/10

formbook n7ak discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

n7ak

Decoy

wise-transfer.info

jam-nins.com

thebestsocialcrm.com

majomeow222.com

ancientshadowguilt.space

gentleman-china.com

parquemermoz.store

taxuw.com

sharqiyapaints.com

libraryofkath.com

1949wan.com

synqr.net

bitchessgirls.com

btonu.cfd

coding-bootcamps-16314.com

leadership22-tdh.site

maximsboutique.com

irishsummertruffles.com

sdnaqianchuan.com

uyews.xyz

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/2992-19-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2652-23-0x0000000000080000-0x00000000000AF000-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
2212	powershell.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1728 set thread context of 2992	1728	PaidInvoicePdf.exe	35
PID 2992 set thread context of 1224	2992	RegSvcs.exe	21
PID 2652 set thread context of 1224	2652	cmmon32.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	PaidInvoicePdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmmon32.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-4177215427-74451935-3209572229-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmmon32.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2976	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1728	PaidInvoicePdf.exe
1728	PaidInvoicePdf.exe
2992	RegSvcs.exe
2992	RegSvcs.exe
2212	powershell.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
2992	RegSvcs.exe
2992	RegSvcs.exe
2992	RegSvcs.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe
2652	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	PaidInvoicePdf.exe
Token: SeDebugPrivilege	2992	RegSvcs.exe
Token: SeDebugPrivilege	2212	powershell.exe
Token: SeDebugPrivilege	2652	cmmon32.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 2212	1728	PaidInvoicePdf.exe	31
PID 1728 wrote to memory of 2212	1728	PaidInvoicePdf.exe	31
PID 1728 wrote to memory of 2212	1728	PaidInvoicePdf.exe	31
PID 1728 wrote to memory of 2212	1728	PaidInvoicePdf.exe	31
PID 1728 wrote to memory of 2976	1728	PaidInvoicePdf.exe	33
PID 1728 wrote to memory of 2976	1728	PaidInvoicePdf.exe	33
PID 1728 wrote to memory of 2976	1728	PaidInvoicePdf.exe	33
PID 1728 wrote to memory of 2976	1728	PaidInvoicePdf.exe	33
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1728 wrote to memory of 2992	1728	PaidInvoicePdf.exe	35
PID 1224 wrote to memory of 2652	1224	Explorer.EXE	36
PID 1224 wrote to memory of 2652	1224	Explorer.EXE	36
PID 1224 wrote to memory of 2652	1224	Explorer.EXE	36
PID 1224 wrote to memory of 2652	1224	Explorer.EXE	36
PID 2652 wrote to memory of 2236	2652	cmmon32.exe	37
PID 2652 wrote to memory of 2236	2652	cmmon32.exe	37
PID 2652 wrote to memory of 2236	2652	cmmon32.exe	37
PID 2652 wrote to memory of 2236	2652	cmmon32.exe	37
PID 2652 wrote to memory of 2236	2652	cmmon32.exe	37

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Users\Admin\AppData\Local\Temp\PaidInvoicePdf.exe
  "C:\Users\Admin\AppData\Local\Temp\PaidInvoicePdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1728
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\RGmpQiEFWWTW.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2212
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RGmpQiEFWWTW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB37.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2976
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2992
- C:\Windows\SysWOW64\cmmon32.exe
  "C:\Windows\SysWOW64\cmmon32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2652
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2236

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB37.tmp

Filesize
1KB

MD5
23779b3f4656ca93a6aa9450b3f5442f

SHA1
6ea78bab02fe519f88fe1944ba79d7835e1cfdba

SHA256
e30335c14b2f65c32d4a676ec3a75c897bc2ab9af6e88e5ead5bd4dea3e4a6c2

SHA512
b18dfd7402af458fb515178e63cc84c5aa8604ad9f82282127ad8451dc7188a18d6fd44494fb33b6e1ae990600e13205e0978365f10bdf49c8fb1167041429b8

Download Submit
memory/1728-6-0x0000000000490000-0x0000000000508000-memory.dmp

Filesize
480KB

Download
memory/1728-20-0x0000000074E50000-0x000000007553E000-memory.dmp

Filesize
6.9MB

Download
memory/1728-3-0x00000000005A0000-0x00000000005BE000-memory.dmp

Filesize
120KB

Download
memory/1728-4-0x0000000074E5E000-0x0000000074E5F000-memory.dmp

Filesize
4KB

Download
memory/1728-5-0x0000000074E50000-0x000000007553E000-memory.dmp

Filesize
6.9MB

Download
memory/1728-0-0x0000000074E5E000-0x0000000074E5F000-memory.dmp

Filesize
4KB

Download
memory/1728-1-0x0000000000030000-0x00000000000E4000-memory.dmp

Filesize
720KB

Download
memory/1728-2-0x0000000074E50000-0x000000007553E000-memory.dmp

Filesize
6.9MB

Download
memory/2652-23-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/2652-22-0x0000000000840000-0x000000000084D000-memory.dmp

Filesize
52KB

Download
memory/2992-14-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2992-16-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2992-18-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2992-19-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download