formbook | a8770dcdc0b4dc16d1bbad2af585b6e03442054cc7064ecb474e8ce448ae4067

Analysis

max time kernel
146s
max time network
136s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-01-2025 11:16

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General

Target

bukron2.1.exe
Size

1.7MB
MD5

88d15a726fe470a2ce43830f72e0a54a
SHA1

f89cc778c0e38eb023f925066c2dd918e0a594c9
SHA256

a8770dcdc0b4dc16d1bbad2af585b6e03442054cc7064ecb474e8ce448ae4067
SHA512

c5b6a963f1f5295ae57bf5eb43f0e22a04db81379af353cf43d196d7caa21db795d0282b203f1d1c8e012f9deba5b9d2b35355533e5a6bbf0a7e9a680d0d4d14
SSDEEP

24576:xqDEvCTbMWu7rQYlBQcBiT6rprG8a3nbbxlYGMRVpeRENRb98LolWwk8Kn:xTvC/MTQYxsWR7a3bPYGMbp8iRbTpK

Score

10^/10

formbook hwu6 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

hwu6

Decoy

lf758.vip

locerin-hair.shop

vytech.net

pet-insurance-intl-7990489.live

thepolithat.buzz

d66dr114gl.bond

suv-deals-49508.bond

job-offer-53922.bond

drstone1.click

lebahsemesta57.click

olmanihousel.shop

piedmontcsb.info

trisula888x.top

66sodovna.net

dental-implants-83810.bond

imxtld.club

frozenpines.net

ffgzgbl.xyz

tlc7z.rest

alexismuller.design

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
behavioral1/memory/2188-3-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2188-6-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2744-12-0x0000000000090000-0x00000000000BF000-memory.dmp	formbook

Blocklisted process makes network request 1 IoCs

flow	pid	Process
11	2744	cmstp.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2204 set thread context of 2188	2204	bukron2.1.exe	30
PID 2188 set thread context of 1208	2188	svchost.exe	21
PID 2744 set thread context of 1208	2744	cmstp.exe	21

System Location Discovery: System Language Discovery 1 TTPs 3 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	bukron2.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmstp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2188	svchost.exe
2188	svchost.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe
2744	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1208	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2204	bukron2.1.exe
2188	svchost.exe
2188	svchost.exe
2188	svchost.exe
2744	cmstp.exe
2744	cmstp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	svchost.exe
Token: SeDebugPrivilege	2744	cmstp.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2204	bukron2.1.exe
2204	bukron2.1.exe
1208	Explorer.EXE
1208	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2204	bukron2.1.exe
2204	bukron2.1.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
1208	Explorer.EXE

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2188	2204	bukron2.1.exe	30
PID 2204 wrote to memory of 2188	2204	bukron2.1.exe	30
PID 2204 wrote to memory of 2188	2204	bukron2.1.exe	30
PID 2204 wrote to memory of 2188	2204	bukron2.1.exe	30
PID 2204 wrote to memory of 2188	2204	bukron2.1.exe	30
PID 1208 wrote to memory of 2744	1208	Explorer.EXE	56
PID 1208 wrote to memory of 2744	1208	Explorer.EXE	56
PID 1208 wrote to memory of 2744	1208	Explorer.EXE	56
PID 1208 wrote to memory of 2744	1208	Explorer.EXE	56
PID 1208 wrote to memory of 2744	1208	Explorer.EXE	56
PID 1208 wrote to memory of 2744	1208	Explorer.EXE	56
PID 1208 wrote to memory of 2744	1208	Explorer.EXE	56
PID 2744 wrote to memory of 2856	2744	cmstp.exe	57
PID 2744 wrote to memory of 2856	2744	cmstp.exe	57
PID 2744 wrote to memory of 2856	2744	cmstp.exe	57
PID 2744 wrote to memory of 2856	2744	cmstp.exe	57

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Users\Admin\AppData\Local\Temp\bukron2.1.exe
  "C:\Users\Admin\AppData\Local\Temp\bukron2.1.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2204
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\bukron2.1.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2188
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2988
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2356
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2388
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2516
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2520
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:1360
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:1856
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:1964
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:1980
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2880
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2784
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2184
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2216
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2468
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2740
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2280
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2552
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2704
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2800
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2816
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2820
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2840
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2868
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2804
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:2752
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Blocklisted process makes network request
  - 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:2744
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2856

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/1208-8-0x0000000003B80000-0x0000000003C80000-memory.dmp

Filesize
1024KB

Download
memory/1208-18-0x0000000005100000-0x000000000526B000-memory.dmp

Filesize
1.4MB

Download
memory/1208-14-0x0000000003B80000-0x0000000003C80000-memory.dmp

Filesize
1024KB

Download
memory/1208-13-0x0000000005020000-0x00000000050F1000-memory.dmp

Filesize
836KB

Download
memory/1208-9-0x0000000005020000-0x00000000050F1000-memory.dmp

Filesize
836KB

Download
memory/2188-7-0x00000000001D0000-0x00000000001E4000-memory.dmp

Filesize
80KB

Download
memory/2188-6-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2188-4-0x0000000000700000-0x0000000000A03000-memory.dmp

Filesize
3.0MB

Download
memory/2188-3-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2204-2-0x0000000000830000-0x0000000000C30000-memory.dmp

Filesize
4.0MB

Download
memory/2744-10-0x00000000004F0000-0x0000000000508000-memory.dmp

Filesize
96KB

Download
memory/2744-11-0x00000000004F0000-0x0000000000508000-memory.dmp

Filesize
96KB

Download
memory/2744-12-0x0000000000090000-0x00000000000BF000-memory.dmp

Filesize
188KB

Download