formbook | 96db10359bb6873fa460c8c59acbb033c00814d1130da12cf655b21be994ce6e

General

Target

SURRENDERED BL-LL2517277SIN14_PDF.exe
Size

301KB
MD5

cb55b1c8b112717e074a933736d752ad
SHA1

7cd50bef2260873a9132fec9fd0b5a74917c78ae
SHA256

f67e87585159ebb0d655eb17852a6c506e238d10091f3e7c9c3952e1d7c5df43
SHA512

ad381a9898849b644efb4469563e8e295b3f87fe98c1f57c8395696c161aa915b129a8ff1c4136f3be00286470a23f4b492a5a5e488fa739d2d3c850865463e9
SSDEEP

3072:rS17XJiDxmJJtX+WI+uO2u6TszZsyCAe1lw6na8xm/gDO3std4h9v4/0nrgoaKM8:rGiO+p+uOx6TKsTFaWM97xxAlKUPYH

Score

10^/10

formbook b62n discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

b62n

Decoy

omegalicious1.info

yingguang.online

outdoorbeckley.com

ws-modeiraramix.site

kellymikelfordelegate.info

kaakg.com

lasoigdreasu.xyz

leisurenites.com

freerobloxhairroblox.com

samefhope.xyz

metacareprogram.com

futmagic.cat

lianshilongfuwu.com

qqxx88.com

lifesessentialz.com

wonderaisuite.com

joyorusa.com

gjlservicesok.com

padrestranquilos.com

supriforte.com

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/2516-9-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2516-12-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2520-19-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2700	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2032	SURRENDERED BL-LL2517277SIN14_PDF.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2032 set thread context of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 2516 set thread context of 1224	2516	SURRENDERED BL-LL2517277SIN14_PDF.exe	21
PID 2520 set thread context of 1224	2520	chkdsk.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 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	chkdsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SURRENDERED BL-LL2517277SIN14_PDF.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
2516	SURRENDERED BL-LL2517277SIN14_PDF.exe
2516	SURRENDERED BL-LL2517277SIN14_PDF.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe
2520	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2516	SURRENDERED BL-LL2517277SIN14_PDF.exe
2516	SURRENDERED BL-LL2517277SIN14_PDF.exe
2516	SURRENDERED BL-LL2517277SIN14_PDF.exe
2520	chkdsk.exe
2520	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	SURRENDERED BL-LL2517277SIN14_PDF.exe
Token: SeDebugPrivilege	2520	chkdsk.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 2032 wrote to memory of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 2032 wrote to memory of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 2032 wrote to memory of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 2032 wrote to memory of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 2032 wrote to memory of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 2032 wrote to memory of 2516	2032	SURRENDERED BL-LL2517277SIN14_PDF.exe	30
PID 1224 wrote to memory of 2520	1224	Explorer.EXE	31
PID 1224 wrote to memory of 2520	1224	Explorer.EXE	31
PID 1224 wrote to memory of 2520	1224	Explorer.EXE	31
PID 1224 wrote to memory of 2520	1224	Explorer.EXE	31
PID 2520 wrote to memory of 2700	2520	chkdsk.exe	32
PID 2520 wrote to memory of 2700	2520	chkdsk.exe	32
PID 2520 wrote to memory of 2700	2520	chkdsk.exe	32
PID 2520 wrote to memory of 2700	2520	chkdsk.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Users\Admin\AppData\Local\Temp\SURRENDERED BL-LL2517277SIN14_PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\SURRENDERED BL-LL2517277SIN14_PDF.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\Users\Admin\AppData\Local\Temp\SURRENDERED BL-LL2517277SIN14_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\SURRENDERED BL-LL2517277SIN14_PDF.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2516
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2520
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\SURRENDERED BL-LL2517277SIN14_PDF.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nst9638.tmp\jrtnw.dll

Filesize
119KB

MD5
053e283c36f91d1f1537e5e156da3853

SHA1
502bd093ad89b93398d0ba046cd0f10f4be37069

SHA256
dd06f297b9966525c5b73e7bb63db9f02e3c9e7eab89c2980a292f35a7afeaf7

SHA512
27731297ce8ce34360b7aa19cfa3526453794b7475875f4312ed9289309e77e16ff48428a793359986662130c0c6dca33e174cc6c74c075666369b4b5f963513

Download Submit
memory/1224-13-0x0000000000360000-0x0000000000460000-memory.dmp

Filesize
1024KB

Download
memory/1224-14-0x00000000068C0000-0x00000000069CA000-memory.dmp

Filesize
1.0MB

Download
memory/1224-20-0x00000000068C0000-0x00000000069CA000-memory.dmp

Filesize
1.0MB

Download
memory/2032-7-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2032-10-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2516-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2516-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2520-17-0x0000000000160000-0x0000000000167000-memory.dmp

Filesize
28KB

Download
memory/2520-18-0x0000000000160000-0x0000000000167000-memory.dmp

Filesize
28KB

Download
memory/2520-19-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download

Analysis

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