formbook | e646286ab06f7d1cdaebd185c1f72d48bdda8c81830629409cfdc04bef50349c

General

Target

malw.exe
Size

590KB
MD5

bf6825aa4d46ea7bf5368dccd8cb7681
SHA1

acc0867bf35aac76f89009eab0d67fb6182246da
SHA256

e646286ab06f7d1cdaebd185c1f72d48bdda8c81830629409cfdc04bef50349c
SHA512

51e800b3cf639f106e79b1a271353ff4277fcf5fc77745a77e9017a9a3029115fa106ff28514a1104174fc700eca3e38f7cc9ab213f61df324f1e3cb0afa6531
SSDEEP

12288:Uh8bQbrxKlcjdOliPwsSpRYAKrgCqZKVvsABefO5fw:U+I9kiPqR/04KCABem

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 payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/2728-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2728-20-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2728-22-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2796-24-0x0000000000080000-0x00000000000AF000-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
2160	powershell.exe

Deletes itself 1 IoCs

pid	Process
2616	cmd.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 2728	2256	malw.exe	31
PID 2728 set thread context of 1200	2728	malw.exe	20
PID 2728 set thread context of 1200	2728	malw.exe	20
PID 2796 set thread context of 1200	2796	wininit.exe	20

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 5 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	malw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	malw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wininit.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
2728	malw.exe
2728	malw.exe
2160	powershell.exe
2728	malw.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe
2796	wininit.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1200	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2728	malw.exe
2728	malw.exe
2728	malw.exe
2728	malw.exe
2796	wininit.exe
2796	wininit.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	malw.exe
Token: SeDebugPrivilege	2160	powershell.exe
Token: SeDebugPrivilege	2796	wininit.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2160	2256	malw.exe	29
PID 2256 wrote to memory of 2160	2256	malw.exe	29
PID 2256 wrote to memory of 2160	2256	malw.exe	29
PID 2256 wrote to memory of 2160	2256	malw.exe	29
PID 2256 wrote to memory of 2728	2256	malw.exe	31
PID 2256 wrote to memory of 2728	2256	malw.exe	31
PID 2256 wrote to memory of 2728	2256	malw.exe	31
PID 2256 wrote to memory of 2728	2256	malw.exe	31
PID 2256 wrote to memory of 2728	2256	malw.exe	31
PID 2256 wrote to memory of 2728	2256	malw.exe	31
PID 2256 wrote to memory of 2728	2256	malw.exe	31
PID 2728 wrote to memory of 2796	2728	malw.exe	34
PID 2728 wrote to memory of 2796	2728	malw.exe	34
PID 2728 wrote to memory of 2796	2728	malw.exe	34
PID 2728 wrote to memory of 2796	2728	malw.exe	34
PID 2796 wrote to memory of 2616	2796	wininit.exe	35
PID 2796 wrote to memory of 2616	2796	wininit.exe	35
PID 2796 wrote to memory of 2616	2796	wininit.exe	35
PID 2796 wrote to memory of 2616	2796	wininit.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
PID:1200
- C:\Users\Admin\AppData\Local\Temp\malw.exe
  "C:\Users\Admin\AppData\Local\Temp\malw.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2256
- - 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\malw.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2160
- - C:\Users\Admin\AppData\Local\Temp\malw.exe
    "C:\Users\Admin\AppData\Local\Temp\malw.exe"
    3⤵
    - 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:2728
  - - C:\Windows\SysWOW64\wininit.exe
      "C:\Windows\SysWOW64\wininit.exe"
      4⤵
      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:2796
    - - C:\Windows\SysWOW64\cmd.exe
        
        /c del "C:\Users\Admin\AppData\Local\Temp\malw.exe"
        5⤵
        Deletes itself
        System Location Discovery: System Language Discovery
        
        PID:2616
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:2936
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:2760

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/1200-19-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

Filesize
1024KB

Download
memory/1200-27-0x0000000007530000-0x0000000007679000-memory.dmp

Filesize
1.3MB

Download
memory/1200-25-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

Filesize
1024KB

Download
memory/1200-21-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

Filesize
1024KB

Download
memory/2256-5-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2256-4-0x00000000748CE000-0x00000000748CF000-memory.dmp

Filesize
4KB

Download
memory/2256-6-0x0000000004290000-0x0000000004306000-memory.dmp

Filesize
472KB

Download
memory/2256-1-0x00000000008F0000-0x000000000098A000-memory.dmp

Filesize
616KB

Download
memory/2256-2-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2256-0-0x00000000748CE000-0x00000000748CF000-memory.dmp

Filesize
4KB

Download
memory/2256-3-0x00000000006A0000-0x00000000006B2000-memory.dmp

Filesize
72KB

Download
memory/2256-14-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2728-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2728-17-0x0000000000990000-0x0000000000C93000-memory.dmp

Filesize
3.0MB

Download
memory/2728-20-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2728-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2728-22-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2728-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2728-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2796-23-0x0000000000CA0000-0x0000000000CBA000-memory.dmp

Filesize
104KB

Download
memory/2796-24-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download

Analysis

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