formbook | 8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-11-2024 14:07

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General

Target

8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe
Size

1.1MB
MD5

1b597c240cd23fda73024ed811e4a906
SHA1

f773bdd6e924b65284d8a9ef67f61615a9764a8e
SHA256

8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73
SHA512

d1f00b959befd0c8f91587311d715508c45fb279e661f4ffacb5e3e5f0f19e4151f6baa35ff49fc5d7afe5bb0b09d96346da5d7b0324ee85edb4885ce07f07dc
SSDEEP

24576:Etb20pkaCqT5TBWgNQ7aXe1SQkPXr8mzcLk6A:tVg5tQ7aXe1bkPXAmzcY5

Score

10^/10

formbook f29s discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

f29s

Decoy

rostnixon.net

exxxwordz.xyz

ndradesanches.shop

eneral-vceef.xyz

isanbowl.top

aresrasherregard.cfd

dzas-yeah.xyz

0083.miami

hongziyin01.top

jdhfmq.live

alembottling.net

vtyo-phone.xyz

kaqb-decade.xyz

odel-lsmfz.xyz

aradise.tech

uan123-rtp43.xyz

pusptracking.xyz

uqhi42.xyz

mihy-professor.xyz

mnz-your.xyz

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/3836-20-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3836-23-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3640-28-0x0000000000C50000-0x0000000000C7F000-memory.dmp	formbook

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Dunlop.vbs	Dunlop.exe

Executes dropped EXE 1 IoCs

pid	Process
2064	Dunlop.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0010000000023ad4-9.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2064 set thread context of 3836	2064	Dunlop.exe	88
PID 3836 set thread context of 3484	3836	svchost.exe	56
PID 3640 set thread context of 3484	3640	cmmon32.exe	56

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	cmmon32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dunlop.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

pid	Process
3836	svchost.exe
3836	svchost.exe
3836	svchost.exe
3836	svchost.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe
3640	cmmon32.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2064	Dunlop.exe
3836	svchost.exe
3836	svchost.exe
3836	svchost.exe
3640	cmmon32.exe
3640	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3836	svchost.exe
Token: SeDebugPrivilege	3640	cmmon32.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3484	Explorer.EXE

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4576 wrote to memory of 2064	4576	8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe	86
PID 4576 wrote to memory of 2064	4576	8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe	86
PID 4576 wrote to memory of 2064	4576	8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe	86
PID 2064 wrote to memory of 3836	2064	Dunlop.exe	88
PID 2064 wrote to memory of 3836	2064	Dunlop.exe	88
PID 2064 wrote to memory of 3836	2064	Dunlop.exe	88
PID 2064 wrote to memory of 3836	2064	Dunlop.exe	88
PID 3484 wrote to memory of 3640	3484	Explorer.EXE	89
PID 3484 wrote to memory of 3640	3484	Explorer.EXE	89
PID 3484 wrote to memory of 3640	3484	Explorer.EXE	89
PID 3640 wrote to memory of 3996	3640	cmmon32.exe	97
PID 3640 wrote to memory of 3996	3640	cmmon32.exe	97
PID 3640 wrote to memory of 3996	3640	cmmon32.exe	97

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Users\Admin\AppData\Local\Temp\8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe
  "C:\Users\Admin\AppData\Local\Temp\8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4576
- - C:\Users\Admin\AppData\Local\Thebesian\Dunlop.exe
    "C:\Users\Admin\AppData\Local\Temp\8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2064
  - - C:\Windows\SysWOW64\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73.exe"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:3836
- C:\Windows\SysWOW64\cmmon32.exe
  "C:\Windows\SysWOW64\cmmon32.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:3640
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3996

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

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Downloads

C:\Users\Admin\AppData\Local\Thebesian\Dunlop.exe

Filesize
1.1MB

MD5
1b597c240cd23fda73024ed811e4a906

SHA1
f773bdd6e924b65284d8a9ef67f61615a9764a8e

SHA256
8a91c4bf99a674909e6993d52e061547517056d36f9b8e828a9148eb412ffa73

SHA512
d1f00b959befd0c8f91587311d715508c45fb279e661f4ffacb5e3e5f0f19e4151f6baa35ff49fc5d7afe5bb0b09d96346da5d7b0324ee85edb4885ce07f07dc

Download Submit
memory/2064-18-0x0000000000E80000-0x0000000001280000-memory.dmp

Filesize
4.0MB

Download
memory/3484-29-0x000000000A970000-0x000000000AB16000-memory.dmp

Filesize
1.6MB

Download
memory/3484-25-0x000000000A970000-0x000000000AB16000-memory.dmp

Filesize
1.6MB

Download
memory/3484-32-0x0000000008850000-0x0000000008949000-memory.dmp

Filesize
996KB

Download
memory/3484-34-0x0000000008850000-0x0000000008949000-memory.dmp

Filesize
996KB

Download
memory/3484-35-0x0000000008850000-0x0000000008949000-memory.dmp

Filesize
996KB

Download
memory/3640-26-0x0000000000930000-0x000000000093C000-memory.dmp

Filesize
48KB

Download
memory/3640-27-0x0000000000930000-0x000000000093C000-memory.dmp

Filesize
48KB

Download
memory/3640-28-0x0000000000C50000-0x0000000000C7F000-memory.dmp

Filesize
188KB

Download
memory/3836-20-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3836-21-0x0000000000E30000-0x000000000117A000-memory.dmp

Filesize
3.3MB

Download
memory/3836-24-0x0000000000B90000-0x0000000000BA4000-memory.dmp

Filesize
80KB

Download
memory/3836-23-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4576-6-0x00000000018F0000-0x0000000001CF0000-memory.dmp

Filesize
4.0MB

Download