formbook | db2bba5bfe8b914d1177c437c38d230ab0291f47c2142a6d2174f5a1cabd3641

General

Target

5.exe
Size

648KB
MD5

744cbe71736e73db7e940443ba884c23
SHA1

e8375f6a7cd38e5675804d3a31f8673be2072e02
SHA256

db2bba5bfe8b914d1177c437c38d230ab0291f47c2142a6d2174f5a1cabd3641
SHA512

c46965b0697734dc4fdf02a74ee77f4bdc7b6d7a326e37ad233dff25d942e5786616b79ed2f42ce2c4497654f4bb122040c8410853db3760f256268c7f8f35f6
SSDEEP

12288:m5Wa+Fb6TnaG4UDlSAnbWg5SIFlunEq8WPuWVj65OLgCck09e+:BFknDRnbroO35xb

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/2760-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2760-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2692-24-0x0000000000080000-0x00000000000AF000-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
2836	powershell.exe

Deletes itself 1 IoCs

pid	Process
2340	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 308 set thread context of 2760	308	5.exe	32
PID 2760 set thread context of 1196	2760	5.exe	21
PID 2692 set thread context of 1196	2692	wlanext.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 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	5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wlanext.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2760	5.exe
2760	5.exe
2836	powershell.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe
2692	wlanext.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2760	5.exe
2760	5.exe
2760	5.exe
2692	wlanext.exe
2692	wlanext.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	5.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	2692	wlanext.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 308 wrote to memory of 2836	308	5.exe	30
PID 308 wrote to memory of 2836	308	5.exe	30
PID 308 wrote to memory of 2836	308	5.exe	30
PID 308 wrote to memory of 2836	308	5.exe	30
PID 308 wrote to memory of 2760	308	5.exe	32
PID 308 wrote to memory of 2760	308	5.exe	32
PID 308 wrote to memory of 2760	308	5.exe	32
PID 308 wrote to memory of 2760	308	5.exe	32
PID 308 wrote to memory of 2760	308	5.exe	32
PID 308 wrote to memory of 2760	308	5.exe	32
PID 308 wrote to memory of 2760	308	5.exe	32
PID 1196 wrote to memory of 2692	1196	Explorer.EXE	33
PID 1196 wrote to memory of 2692	1196	Explorer.EXE	33
PID 1196 wrote to memory of 2692	1196	Explorer.EXE	33
PID 1196 wrote to memory of 2692	1196	Explorer.EXE	33
PID 2692 wrote to memory of 2340	2692	wlanext.exe	34
PID 2692 wrote to memory of 2340	2692	wlanext.exe	34
PID 2692 wrote to memory of 2340	2692	wlanext.exe	34
PID 2692 wrote to memory of 2340	2692	wlanext.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Users\Admin\AppData\Local\Temp\5.exe
  "C:\Users\Admin\AppData\Local\Temp\5.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:308
- - 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\5.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2836
- - C:\Users\Admin\AppData\Local\Temp\5.exe
    "C:\Users\Admin\AppData\Local\Temp\5.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2760
- C:\Windows\SysWOW64\wlanext.exe
  "C:\Windows\SysWOW64\wlanext.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:2692
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\5.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2340

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/308-14-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/308-1-0x0000000000BE0000-0x0000000000C88000-memory.dmp

Filesize
672KB

Download
memory/308-2-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/308-3-0x00000000005A0000-0x00000000005BE000-memory.dmp

Filesize
120KB

Download
memory/308-4-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/308-5-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/308-6-0x00000000005F0000-0x000000000066A000-memory.dmp

Filesize
488KB

Download
memory/308-0-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/1196-21-0x0000000000010000-0x0000000000020000-memory.dmp

Filesize
64KB

Download
memory/1196-22-0x0000000005010000-0x00000000050CC000-memory.dmp

Filesize
752KB

Download
memory/1196-26-0x0000000005010000-0x00000000050CC000-memory.dmp

Filesize
752KB

Download
memory/2692-23-0x00000000006D0000-0x00000000006E6000-memory.dmp

Filesize
88KB

Download
memory/2692-24-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/2760-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2760-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2760-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2760-15-0x00000000008D0000-0x0000000000BD3000-memory.dmp

Filesize
3.0MB

Download
memory/2760-18-0x0000000000190000-0x00000000001A4000-memory.dmp

Filesize
80KB

Download
memory/2760-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2760-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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