791ce874535974d5a8409ba64cd41408a2ab3a02594696a716a807606ed5963d

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 02:43

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General

Target

8b30f2ad28c8348159eee263a1920851.exe
Size

68KB
MD5

8b30f2ad28c8348159eee263a1920851
SHA1

a33787ea9dff953a16013a18a513ef18e9b8a58d
SHA256

791ce874535974d5a8409ba64cd41408a2ab3a02594696a716a807606ed5963d
SHA512

db8e98fb7d89095d09de47f0e996e56ceefc15f2fe009f6aed545c6e9b26a65441aeb3d0ad261a5d73c033a891da6fef2c10a0f8e67b156f64fbaff9461c7015
SSDEEP

1536:rB1uogW/LAqPhF7H7ZwAscRc2Ektd2W5lehld:VEogW/BzLaADq2Bt4WH6

Score

7^/10

persistence upx

Malware Config

Signatures

Loads dropped DLL 2 IoCs

pid	Process
1864	8b30f2ad28c8348159eee263a1920851.exe
4656	rundll32.exe

UPX packed file 9 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1864-1-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1864-2-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1864-4-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1864-10-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1864-11-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1864-12-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1864-18-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4656-31-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4656-32-0x0000000010000000-0x0000000010014000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\cbXPggDt.dll,#1"	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\jkkJaayA.dll	8b30f2ad28c8348159eee263a1920851.exe
File created	C:\Windows\SysWOW64\jkkJaayA.dll	8b30f2ad28c8348159eee263a1920851.exe
File created	C:\Windows\SysWOW64\cbXPggDt.dll	8b30f2ad28c8348159eee263a1920851.exe
File opened for modification	C:\Windows\SysWOW64\cbXPggDt.dll	8b30f2ad28c8348159eee263a1920851.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7336D32-62F7-43B5-8B8C-3963C72CA498}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7336D32-62F7-43B5-8B8C-3963C72CA498}\InprocServer32\ = "C:\\Windows\\SysWow64\\cbXPggDt.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7336D32-62F7-43B5-8B8C-3963C72CA498}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D7336D32-62F7-43B5-8B8C-3963C72CA498}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1864	8b30f2ad28c8348159eee263a1920851.exe
1864	8b30f2ad28c8348159eee263a1920851.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe
4656	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1864	8b30f2ad28c8348159eee263a1920851.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1864	8b30f2ad28c8348159eee263a1920851.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 608	1864	8b30f2ad28c8348159eee263a1920851.exe	4
PID 1864 wrote to memory of 4656	1864	8b30f2ad28c8348159eee263a1920851.exe	97
PID 1864 wrote to memory of 4656	1864	8b30f2ad28c8348159eee263a1920851.exe	97
PID 1864 wrote to memory of 4656	1864	8b30f2ad28c8348159eee263a1920851.exe	97
PID 1864 wrote to memory of 3936	1864	8b30f2ad28c8348159eee263a1920851.exe	98
PID 1864 wrote to memory of 3936	1864	8b30f2ad28c8348159eee263a1920851.exe	98
PID 1864 wrote to memory of 3936	1864	8b30f2ad28c8348159eee263a1920851.exe	98

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:608

C:\Users\Admin\AppData\Local\Temp\8b30f2ad28c8348159eee263a1920851.exe
"C:\Users\Admin\AppData\Local\Temp\8b30f2ad28c8348159eee263a1920851.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\cbXPggDt.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:4656
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\removalfile.bat "C:\Users\Admin\AppData\Local\Temp\8b30f2ad28c8348159eee263a1920851.exe"
  2⤵
  PID:3936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\removalfile.bat

Filesize
43B

MD5
9a7ef09167a6f4433681b94351509043

SHA1
259b1375ed8e84943ca1d42646bb416325c89e12

SHA256
d5739a0510d89da572eb0b0d394d4fb4dd361cd9ee0144b9b31c590df93c3be7

SHA512
96b84cd88a0e4b7c1122af3ed6ce5edf0a9a4e9bf79575eadfac16b2c46f1278d57755d29f21d7c6dcb4403be24b7ac7da4837c6cc9c602342a8f2b8e54883df

Download Submit
C:\Windows\SysWOW64\jkkJaayA.dll

Filesize
44KB

MD5
472cdaae4ecb737971c85efaef50224b

SHA1
c03c88a9ae2b4e7e8dc282c78c277bf68abf341d

SHA256
f69511120ac6f710d74d05eb44167d4925f7ba93bb7d340eaa41bde506fc6721

SHA512
ed33d5684e0a6154a35e9de385d1e2c1d9bb620c29d3a1688ed51511fa29a3d055ec8d5eed5b7a958b4629091e320f2caab4faeacfd87091f2226ef18d8a58bc

Download Submit
memory/1864-10-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1864-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-3-0x0000000000540000-0x000000000054F000-memory.dmp

Filesize
60KB

Download
memory/1864-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1864-11-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1864-12-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1864-13-0x0000000002BB0000-0x0000000002BB9000-memory.dmp

Filesize
36KB

Download
memory/1864-18-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1864-1-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4656-31-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4656-32-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download