formbook | c7b093c037ac1aeabaf010ec82042f89e87f667f41a5786d14d524c82c84f95b

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2024 16:02

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General

Target

skyrun6678zhwevi.exe
Size

1.0MB
MD5

43e40486285956beaffed65745f28b0a
SHA1

98f08012fd95967761b71b64ce3c91332c4bdc37
SHA256

c7757a3c21c62d9f56a30bfe1660727de4932993c0d4e3c650f001914599905b
SHA512

f7ff5cd2ab47153d7f699e55583afa6dc1d34d3e60abf9f43d13011136512d3e48474cd2e13cd9454f53a6260669fe54c50220e870fe3c486a5cb7bc7f6f454b
SSDEEP

24576:aRA4228CFtXo2A/Nzf1pccEOw2ia84Pj2hQ2PQrY:ah2JCFtXo2Yd+2ia84PShQ2IrY

Score

10^/10

formbook sn31 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

sn31

Decoy

matsuomatsuo.com

104wn.com

bolacorner.com

dawonderer.com

yourpamlano.xyz

mtzmx.icu

lepakzaparket.com

barmagli.com

danta.ltd

marumaru240.com

people-centeredhr.com

test-brew-inc.com

clairvoyantbusinesscoach.com

aforeignexchangeblog.com

erentekbilisim.com

gangqinqu123.net

defiguaranteebonds.com

thegioigaubong97.site

vaoiwin.info

vcwholeness.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Formbook family
formbook

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/4044-1545-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/4044-1549-0x0000000000400000-0x000000000042F000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1744 set thread context of 4044	1744	skyrun6678zhwevi.exe	84
PID 4044 set thread context of 3508	4044	InstallUtil.exe	56
PID 508 set thread context of 3508	508	wlanext.exe	56

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	skyrun6678zhwevi.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 63 IoCs

pid	Process
1744	skyrun6678zhwevi.exe
1744	skyrun6678zhwevi.exe
1744	skyrun6678zhwevi.exe
4044	InstallUtil.exe
4044	InstallUtil.exe
4044	InstallUtil.exe
4044	InstallUtil.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe
508	wlanext.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4044	InstallUtil.exe
4044	InstallUtil.exe
4044	InstallUtil.exe
508	wlanext.exe
508	wlanext.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1744	skyrun6678zhwevi.exe
Token: SeDebugPrivilege	4044	InstallUtil.exe
Token: SeDebugPrivilege	508	wlanext.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1744 wrote to memory of 4044	1744	skyrun6678zhwevi.exe	84
PID 1744 wrote to memory of 4044	1744	skyrun6678zhwevi.exe	84
PID 1744 wrote to memory of 4044	1744	skyrun6678zhwevi.exe	84
PID 1744 wrote to memory of 4044	1744	skyrun6678zhwevi.exe	84
PID 1744 wrote to memory of 4044	1744	skyrun6678zhwevi.exe	84
PID 1744 wrote to memory of 4044	1744	skyrun6678zhwevi.exe	84
PID 3508 wrote to memory of 508	3508	Explorer.EXE	85
PID 3508 wrote to memory of 508	3508	Explorer.EXE	85
PID 3508 wrote to memory of 508	3508	Explorer.EXE	85
PID 508 wrote to memory of 3256	508	wlanext.exe	87
PID 508 wrote to memory of 3256	508	wlanext.exe	87
PID 508 wrote to memory of 3256	508	wlanext.exe	87

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3508
- C:\Users\Admin\AppData\Local\Temp\skyrun6678zhwevi.exe
  "C:\Users\Admin\AppData\Local\Temp\skyrun6678zhwevi.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1744
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:4044
- 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:508
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3256

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/508-1555-0x00000000007A0000-0x00000000007B7000-memory.dmp

Filesize
92KB

Download
memory/1744-24-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-50-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-2-0x00000000052A0000-0x00000000053A6000-memory.dmp

Filesize
1.0MB

Download
memory/1744-6-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-8-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-52-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-28-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-66-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-64-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-62-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-60-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-26-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-56-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-54-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-48-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-46-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-44-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-42-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-40-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-38-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-32-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-34-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-30-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-0-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

Filesize
4KB

Download
memory/1744-36-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-1-0x00000000008E0000-0x00000000009E6000-memory.dmp

Filesize
1.0MB

Download
memory/1744-58-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-20-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-18-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-17-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-14-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-12-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-5-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-22-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-10-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-3-0x00000000052A0000-0x000000000539F000-memory.dmp

Filesize
1020KB

Download
memory/1744-1539-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/1744-1540-0x00000000055E0000-0x0000000005672000-memory.dmp

Filesize
584KB

Download
memory/1744-1541-0x00000000055A0000-0x00000000055C2000-memory.dmp

Filesize
136KB

Download
memory/1744-1542-0x0000000005670000-0x00000000059C4000-memory.dmp

Filesize
3.3MB

Download
memory/1744-1546-0x0000000074D50000-0x0000000075500000-memory.dmp

Filesize
7.7MB

Download
memory/3508-1551-0x0000000007A00000-0x0000000007B67000-memory.dmp

Filesize
1.4MB

Download
memory/3508-1557-0x0000000007A00000-0x0000000007B67000-memory.dmp

Filesize
1.4MB

Download
memory/3508-1560-0x0000000007ED0000-0x0000000007FF4000-memory.dmp

Filesize
1.1MB

Download
memory/3508-1563-0x0000000007ED0000-0x0000000007FF4000-memory.dmp

Filesize
1.1MB

Download
memory/4044-1545-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4044-1547-0x0000000001910000-0x0000000001C5A000-memory.dmp

Filesize
3.3MB

Download
memory/4044-1549-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4044-1550-0x00000000015B0000-0x00000000015C4000-memory.dmp

Filesize
80KB

Download