formbook | ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c

Analysis

max time kernel
146s
max time network
143s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27/03/2025, 15:43

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General

Target

ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe
Size

616KB
MD5

33597eea937de9fc85c91fc86d4081da
SHA1

221c42c79cb047ade2346e1da635a1ac359f06ef
SHA256

ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c
SHA512

7dab2e8b3b8852cbe61e6f17c6adc67b1c2662e3f1a4178644d6dd6479be6c549442fd1598123c1f08c13417d647a7dd6d9f530eeff31026d6cecfea04d965f9
SSDEEP

12288:73jM8fLuh/ABkePJNbT3y1UkuEtnrCuk3aMVa:L7faAimNbjkxtnrCzVa

Score

10^/10

formbook 3nop discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

3nop

Decoy

subur88wap.sbs

tyai1.top

skillbeast.site

kcclassiccars.net

lghomes.net

eijanno.cyou

work-in-usa-60100.bond

268chill.store

bharatwin.biz

cakjitu01.xyz

misafert.xyz

hiretemp.net

lvekz-onearmed.top

amanda-manopo.info

seo-companies22.online

casinowalletth.net

maynrson.monster

bewizi.com

thedronetechhub.shop

car-insurance-93947.bond

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Formbook family
formbook

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\skype\\skype.exe,"	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\skype\\skype.exe,"	reg.exe

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral1/memory/2908-26-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2800-29-0x00000000000C0000-0x00000000000EF000-memory.dmp	formbook

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe	cmd.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
3044	skype.exe

Loads dropped DLL 2 IoCs

pid	Process
2828	cmd.exe
2828	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3044 set thread context of 2908	3044	skype.exe	45
PID 2908 set thread context of 1152	2908	AddInProcess32.exe	20
PID 2800 set thread context of 1152	2800	colorcpl.exe	20

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 14 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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	colorcpl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skype.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skype.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 7 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
880	cmd.exe
1428	PING.EXE
2688	cmd.exe
2860	PING.EXE
2828	cmd.exe
2760	PING.EXE
2604	PING.EXE

Runs ping.exe 1 TTPs 4 IoCs

Remote System Discovery

T1018

pid	Process
2760	PING.EXE
2604	PING.EXE
1428	PING.EXE
2860	PING.EXE

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe
2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe
2896	skype.exe
2896	skype.exe
2896	skype.exe
2896	skype.exe
2896	skype.exe
2896	skype.exe
3044	skype.exe
3044	skype.exe
3044	skype.exe
2908	AddInProcess32.exe
2908	AddInProcess32.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe
2800	colorcpl.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1152	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2908	AddInProcess32.exe
2908	AddInProcess32.exe
2908	AddInProcess32.exe
2800	colorcpl.exe
2800	colorcpl.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe
Token: SeDebugPrivilege	2896	skype.exe
Token: SeDebugPrivilege	3044	skype.exe
Token: SeDebugPrivilege	2908	AddInProcess32.exe
Token: SeDebugPrivilege	2800	colorcpl.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1152	Explorer.EXE
1152	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1152	Explorer.EXE
1152	Explorer.EXE

Suspicious use of WriteProcessMemory 59 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 880	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	31
PID 2076 wrote to memory of 880	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	31
PID 2076 wrote to memory of 880	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	31
PID 2076 wrote to memory of 880	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	31
PID 880 wrote to memory of 1428	880	cmd.exe	33
PID 880 wrote to memory of 1428	880	cmd.exe	33
PID 880 wrote to memory of 1428	880	cmd.exe	33
PID 880 wrote to memory of 1428	880	cmd.exe	33
PID 2076 wrote to memory of 2896	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	34
PID 2076 wrote to memory of 2896	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	34
PID 2076 wrote to memory of 2896	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	34
PID 2076 wrote to memory of 2896	2076	ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe	34
PID 2896 wrote to memory of 2688	2896	skype.exe	35
PID 2896 wrote to memory of 2688	2896	skype.exe	35
PID 2896 wrote to memory of 2688	2896	skype.exe	35
PID 2896 wrote to memory of 2688	2896	skype.exe	35
PID 2688 wrote to memory of 2860	2688	cmd.exe	37
PID 2688 wrote to memory of 2860	2688	cmd.exe	37
PID 2688 wrote to memory of 2860	2688	cmd.exe	37
PID 2688 wrote to memory of 2860	2688	cmd.exe	37
PID 2896 wrote to memory of 2828	2896	skype.exe	38
PID 2896 wrote to memory of 2828	2896	skype.exe	38
PID 2896 wrote to memory of 2828	2896	skype.exe	38
PID 2896 wrote to memory of 2828	2896	skype.exe	38
PID 2828 wrote to memory of 2760	2828	cmd.exe	40
PID 2828 wrote to memory of 2760	2828	cmd.exe	40
PID 2828 wrote to memory of 2760	2828	cmd.exe	40
PID 2828 wrote to memory of 2760	2828	cmd.exe	40
PID 2688 wrote to memory of 2872	2688	cmd.exe	41
PID 2688 wrote to memory of 2872	2688	cmd.exe	41
PID 2688 wrote to memory of 2872	2688	cmd.exe	41
PID 2688 wrote to memory of 2872	2688	cmd.exe	41
PID 880 wrote to memory of 2564	880	cmd.exe	42
PID 880 wrote to memory of 2564	880	cmd.exe	42
PID 880 wrote to memory of 2564	880	cmd.exe	42
PID 880 wrote to memory of 2564	880	cmd.exe	42
PID 2828 wrote to memory of 2604	2828	cmd.exe	43
PID 2828 wrote to memory of 2604	2828	cmd.exe	43
PID 2828 wrote to memory of 2604	2828	cmd.exe	43
PID 2828 wrote to memory of 2604	2828	cmd.exe	43
PID 2828 wrote to memory of 3044	2828	cmd.exe	44
PID 2828 wrote to memory of 3044	2828	cmd.exe	44
PID 2828 wrote to memory of 3044	2828	cmd.exe	44
PID 2828 wrote to memory of 3044	2828	cmd.exe	44
PID 3044 wrote to memory of 2908	3044	skype.exe	45
PID 3044 wrote to memory of 2908	3044	skype.exe	45
PID 3044 wrote to memory of 2908	3044	skype.exe	45
PID 3044 wrote to memory of 2908	3044	skype.exe	45
PID 3044 wrote to memory of 2908	3044	skype.exe	45
PID 3044 wrote to memory of 2908	3044	skype.exe	45
PID 3044 wrote to memory of 2908	3044	skype.exe	45
PID 1152 wrote to memory of 2800	1152	Explorer.EXE	46
PID 1152 wrote to memory of 2800	1152	Explorer.EXE	46
PID 1152 wrote to memory of 2800	1152	Explorer.EXE	46
PID 1152 wrote to memory of 2800	1152	Explorer.EXE	46
PID 2800 wrote to memory of 2824	2800	colorcpl.exe	48
PID 2800 wrote to memory of 2824	2800	colorcpl.exe	48
PID 2800 wrote to memory of 2824	2800	colorcpl.exe	48
PID 2800 wrote to memory of 2824	2800	colorcpl.exe	48

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Users\Admin\AppData\Local\Temp\ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe
  "C:\Users\Admin\AppData\Local\Temp\ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Windows\SysWOW64\cmd.exe
    "cmd" /c ping 127.0.0.1 -n 10 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:880
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 10
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1428
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
      4⤵
      Modifies WinLogon for persistence
      System Location Discovery: System Language Discovery
      PID:2564
- - C:\Users\Admin\AppData\Local\Temp\skype.exe
    "C:\Users\Admin\AppData\Local\Temp\skype.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2896
  - - C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 8 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Suspicious use of WriteProcessMemory
      PID:2688
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 127.0.0.1 -n 8
        5⤵
        System Location Discovery: System Language Discovery
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:2860
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe,"
        5⤵
        Modifies WinLogon for persistence
        System Location Discovery: System Language Discovery
        
        PID:2872
  - - C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 18 > nul && copy "C:\Users\Admin\AppData\Local\Temp\skype.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe" && ping 127.0.0.1 -n 18 > nul && "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe"
      4⤵
      Drops startup file
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Suspicious use of WriteProcessMemory
      PID:2828
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 127.0.0.1 -n 18
        5⤵
        System Location Discovery: System Language Discovery
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:2760
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 127.0.0.1 -n 18
        5⤵
        System Location Discovery: System Language Discovery
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:2604
    - - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe
        
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3044
      - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
        6⤵
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of AdjustPrivilegeToken
        
        PID:2908
- C:\Windows\SysWOW64\colorcpl.exe
  "C:\Windows\SysWOW64\colorcpl.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:2800
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\skype\skype.exe

Filesize
616KB

MD5
33597eea937de9fc85c91fc86d4081da

SHA1
221c42c79cb047ade2346e1da635a1ac359f06ef

SHA256
ea4fe51e13f6ab1785535b32345f69ef110e21981bf7dbb09ce02c0bdec1e43c

SHA512
7dab2e8b3b8852cbe61e6f17c6adc67b1c2662e3f1a4178644d6dd6479be6c549442fd1598123c1f08c13417d647a7dd6d9f530eeff31026d6cecfea04d965f9

Download Submit
memory/1152-32-0x0000000007060000-0x00000000071BE000-memory.dmp

Filesize
1.4MB

Download
memory/2076-1-0x0000000000A60000-0x0000000000B00000-memory.dmp

Filesize
640KB

Download
memory/2076-2-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-3-0x00000000006F0000-0x0000000000716000-memory.dmp

Filesize
152KB

Download
memory/2076-0-0x000000007424E000-0x000000007424F000-memory.dmp

Filesize
4KB

Download
memory/2076-5-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2800-28-0x0000000000FA0000-0x0000000000FB8000-memory.dmp

Filesize
96KB

Download
memory/2800-29-0x00000000000C0000-0x00000000000EF000-memory.dmp

Filesize
188KB

Download
memory/2896-4-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2896-7-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2896-6-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/2908-21-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2908-23-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2908-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2908-26-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3044-19-0x0000000000A30000-0x0000000000A4A000-memory.dmp

Filesize
104KB

Download
memory/3044-20-0x0000000000DF0000-0x0000000000DF6000-memory.dmp

Filesize
24KB

Download
memory/3044-18-0x0000000000F30000-0x0000000000FD0000-memory.dmp

Filesize
640KB

Download