formbook | 6d725aa4c3dd38bc7f924af4891b82a9c993e2db67765c72be42778a9c1b561a

Analysis

max time kernel
146s
max time network
140s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
23-08-2024 03:27

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General

Target

$PLUGINSDIR/cbspar.dll
Size

30KB
MD5

31bff8b807f552a663c1a9b37a130564
SHA1

c91442fdd89050d3a37d234eb6595f11f1697afa
SHA256

8c25e6add26bc8ff4c545ced91b02663a2ba8222f1b5e5208910705186c12c9b
SHA512

316cae0648c6ec274b9d2f2ef13d3cc4033505f6859e0ad836bedbbee35356bb0ddaa18eb3d1cc71ec90885188d9df4ba7e41f6e09af4b417f9d475964e848c6
SSDEEP

768:PYYsBQJDh7wN4Ce1k95WuPO8P9se1ABTE+FppTNLFlgs:PoBQJD6LPO8P9fAW8ZNEs

Score

10^/10

formbook dn7r discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

dn7r

Decoy

eventphotographerdfw.com

thehalalcoinstaking.com

philipfaziofineart.com

intercoh.com

gaiaseyephotography.com

chatbotforrealestate.com

lovelancemg.com

marlieskasberger.com

elcongoenespanol.info

lepirecredit.com

distribution-concept.com

e99game.com

exit11festival.com

twodollartoothbrushclub.com

cocktailsandlawn.com

performimprove.network

24horas-telefono-11840.com

cosmossify.com

kellenleote.com

perovskite.energy

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
behavioral3/memory/2168-1-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral3/memory/2168-4-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral3/memory/2924-11-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 2168	2808	rundll32.exe	31
PID 2168 set thread context of 1196	2168	rundll32.exe	21
PID 2924 set thread context of 1196	2924	cmd.exe	21

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2160	2808	WerFault.exe	30

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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2168	rundll32.exe
2168	rundll32.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe
2924	cmd.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2168	rundll32.exe
2168	rundll32.exe
2168	rundll32.exe
2924	cmd.exe
2924	cmd.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2168	rundll32.exe
Token: SeShutdownPrivilege	1196	Explorer.EXE
Token: SeDebugPrivilege	2924	cmd.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2808	2520	rundll32.exe	30
PID 2520 wrote to memory of 2808	2520	rundll32.exe	30
PID 2520 wrote to memory of 2808	2520	rundll32.exe	30
PID 2520 wrote to memory of 2808	2520	rundll32.exe	30
PID 2520 wrote to memory of 2808	2520	rundll32.exe	30
PID 2520 wrote to memory of 2808	2520	rundll32.exe	30
PID 2520 wrote to memory of 2808	2520	rundll32.exe	30
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2168	2808	rundll32.exe	31
PID 2808 wrote to memory of 2160	2808	rundll32.exe	32
PID 2808 wrote to memory of 2160	2808	rundll32.exe	32
PID 2808 wrote to memory of 2160	2808	rundll32.exe	32
PID 2808 wrote to memory of 2160	2808	rundll32.exe	32
PID 1196 wrote to memory of 2924	1196	Explorer.EXE	34
PID 1196 wrote to memory of 2924	1196	Explorer.EXE	34
PID 1196 wrote to memory of 2924	1196	Explorer.EXE	34
PID 1196 wrote to memory of 2924	1196	Explorer.EXE	34
PID 2924 wrote to memory of 2836	2924	cmd.exe	35
PID 2924 wrote to memory of 2836	2924	cmd.exe	35
PID 2924 wrote to memory of 2836	2924	cmd.exe	35
PID 2924 wrote to memory of 2836	2924	cmd.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\cbspar.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2520
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\cbspar.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2808
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\cbspar.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2168
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2808 -s 252
      4⤵
      Program crash
      PID:2160
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2848
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\SysWOW64\cmd.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:2924
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1196-12-0x0000000005130000-0x0000000005262000-memory.dmp

Filesize
1.2MB

Download
memory/1196-19-0x0000000006A80000-0x0000000006B79000-memory.dmp

Filesize
996KB

Download
memory/1196-17-0x0000000006A80000-0x0000000006B79000-memory.dmp

Filesize
996KB

Download
memory/1196-5-0x0000000003A60000-0x0000000003B60000-memory.dmp

Filesize
1024KB

Download
memory/1196-7-0x0000000005130000-0x0000000005262000-memory.dmp

Filesize
1.2MB

Download
memory/1196-16-0x0000000006A80000-0x0000000006B79000-memory.dmp

Filesize
996KB

Download
memory/2168-4-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2168-6-0x00000000001F0000-0x0000000000205000-memory.dmp

Filesize
84KB

Download
memory/2168-2-0x0000000002030000-0x0000000002333000-memory.dmp

Filesize
3.0MB

Download
memory/2168-1-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2808-10-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/2808-0-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/2924-8-0x000000004ABC0000-0x000000004AC0C000-memory.dmp

Filesize
304KB

Download
memory/2924-9-0x000000004ABC0000-0x000000004AC0C000-memory.dmp

Filesize
304KB

Download
memory/2924-11-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download