formbook | 9f2603a2476a025f43bfccc2b2183dd6b002b2fd82f440ae241cc5df7d8a2942

General

Target

Virement 191224.exe
Size

873KB
MD5

63688ea9f539640282554416cb4a4cf4
SHA1

13cb5b6dd5a5e50648268488532bab045ea6f1fd
SHA256

9f2603a2476a025f43bfccc2b2183dd6b002b2fd82f440ae241cc5df7d8a2942
SHA512

d6997ac0072582f383fb585a48df62d84731647b170c287267ae3cedd9cb39d26f7e2bf0aab6929823aeb67cd3261f847c5e8bd91b1f679be7640cf04cc240ab
SSDEEP

12288:A7m348f2uE1zDqqc41vfOpWBidNNwOHL/hHod0NGPYzwyBP2n50ZILIE8f2:c9u2uOspAidNNrlIozdYnGau2

Score

10^/10

formbook bc01 discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

bc01

Decoy

epatitis-treatment-26155.bond

52cy67sk.bond

nline-degree-6987776.world

ingxingdiandeng-2033.top

mberbreeze.cyou

48xc300mw.autos

obs-for-seniors-39582.bond

tpetersburg-3-tonn.online

egafon-parser.online

172jh.shop

ltraman.pro

bqfhnys.shop

ntercash24-cad.homes

uhtwister.cloud

alk-in-tubs-27353.bond

ucas-saaad.buzz

oko.events

8080713.xyz

refabricated-homes-74404.bond

inaa.boo

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/2964-14-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2964-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/3000-25-0x0000000000070000-0x000000000009F000-memory.dmp	formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2920	powershell.exe

Deletes itself 1 IoCs

pid	Process
2720	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1048 set thread context of 2964	1048	Virement 191224.exe	33
PID 2964 set thread context of 1100	2964	Virement 191224.exe	18
PID 3000 set thread context of 1100	3000	cscript.exe	18

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 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	Virement 191224.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2964	Virement 191224.exe
2964	Virement 191224.exe
2920	powershell.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe
3000	cscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2964	Virement 191224.exe
2964	Virement 191224.exe
2964	Virement 191224.exe
3000	cscript.exe
3000	cscript.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2964	Virement 191224.exe
Token: SeDebugPrivilege	2920	powershell.exe
Token: SeDebugPrivilege	3000	cscript.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 2920	1048	Virement 191224.exe	31
PID 1048 wrote to memory of 2920	1048	Virement 191224.exe	31
PID 1048 wrote to memory of 2920	1048	Virement 191224.exe	31
PID 1048 wrote to memory of 2920	1048	Virement 191224.exe	31
PID 1048 wrote to memory of 2964	1048	Virement 191224.exe	33
PID 1048 wrote to memory of 2964	1048	Virement 191224.exe	33
PID 1048 wrote to memory of 2964	1048	Virement 191224.exe	33
PID 1048 wrote to memory of 2964	1048	Virement 191224.exe	33
PID 1048 wrote to memory of 2964	1048	Virement 191224.exe	33
PID 1048 wrote to memory of 2964	1048	Virement 191224.exe	33
PID 1048 wrote to memory of 2964	1048	Virement 191224.exe	33
PID 1100 wrote to memory of 3000	1100	Explorer.EXE	34
PID 1100 wrote to memory of 3000	1100	Explorer.EXE	34
PID 1100 wrote to memory of 3000	1100	Explorer.EXE	34
PID 1100 wrote to memory of 3000	1100	Explorer.EXE	34
PID 3000 wrote to memory of 2720	3000	cscript.exe	35
PID 3000 wrote to memory of 2720	3000	cscript.exe	35
PID 3000 wrote to memory of 2720	3000	cscript.exe	35
PID 3000 wrote to memory of 2720	3000	cscript.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Users\Admin\AppData\Local\Temp\Virement 191224.exe
  "C:\Users\Admin\AppData\Local\Temp\Virement 191224.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Virement 191224.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2920
- - C:\Users\Admin\AppData\Local\Temp\Virement 191224.exe
    "C:\Users\Admin\AppData\Local\Temp\Virement 191224.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2964
- C:\Windows\SysWOW64\cscript.exe
  "C:\Windows\SysWOW64\cscript.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:3000
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Virement 191224.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1048-1-0x0000000000160000-0x0000000000240000-memory.dmp

Filesize
896KB

Download
memory/1048-2-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/1048-3-0x0000000000450000-0x0000000000476000-memory.dmp

Filesize
152KB

Download
memory/1048-4-0x0000000074A4E000-0x0000000074A4F000-memory.dmp

Filesize
4KB

Download
memory/1048-5-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/1048-6-0x0000000004850000-0x00000000048DE000-memory.dmp

Filesize
568KB

Download
memory/1048-21-0x0000000074A40000-0x000000007512E000-memory.dmp

Filesize
6.9MB

Download
memory/1048-0-0x0000000074A4E000-0x0000000074A4F000-memory.dmp

Filesize
4KB

Download
memory/1100-20-0x00000000050E0000-0x000000000523E000-memory.dmp

Filesize
1.4MB

Download
memory/1100-26-0x00000000050E0000-0x000000000523E000-memory.dmp

Filesize
1.4MB

Download
memory/1100-19-0x0000000003B70000-0x0000000003C70000-memory.dmp

Filesize
1024KB

Download
memory/2964-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2964-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2964-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2964-18-0x0000000000240000-0x0000000000254000-memory.dmp

Filesize
80KB

Download
memory/2964-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2964-15-0x0000000000A00000-0x0000000000D03000-memory.dmp

Filesize
3.0MB

Download
memory/2964-14-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3000-24-0x0000000000C10000-0x0000000000C32000-memory.dmp

Filesize
136KB

Download
memory/3000-25-0x0000000000070000-0x000000000009F000-memory.dmp

Filesize
188KB

Download

Analysis

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