f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b

Analysis

max time kernel
36s
max time network
42s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03/12/2022, 02:44

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b.dll
Size

230KB
MD5

f36e7778d529ef8705c6659aec39543c
SHA1

1c016c36c77b824eb52f7a7e8e8b05fa678f326f
SHA256

f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b
SHA512

037abe2e6daf28e5694655d52a6edf68ea58720138269cb794f5f0cac1d773edd60b32b680e0f62e2506cc621dee33b2da76a2856f700abb1348ab575d28d8c9
SSDEEP

1536:QiaVnouSu4CU7XZfjPcj/NMC2PhBRX99m+g9Vxm5dZZpQCLWGUGowkTEI/Q:VioFCUrJcj/uC2b9+x0Jq8uwkQII

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\gbcxq = "{096f8d0c-81e7-d63c-92f8-81e705849177}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
788	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\topkd.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\topkd.dll	rundll32.exe
File created	C:\Windows\SysWOW64\bwxsl.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\bwxsl.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{096f8d0c-81e7-d63c-92f8-81e705849177}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{096f8d0c-81e7-d63c-92f8-81e705849177}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{096f8d0c-81e7-d63c-92f8-81e705849177}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{096f8d0c-81e7-d63c-92f8-81e705849177}\InprocServer32\ = "C:\\Windows\\SysWow64\\bwxsl.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{096f8d0c-81e7-d63c-92f8-81e705849177}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
788	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	788	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
788	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 788	1612	rundll32.exe	26
PID 1612 wrote to memory of 788	1612	rundll32.exe	26
PID 1612 wrote to memory of 788	1612	rundll32.exe	26
PID 1612 wrote to memory of 788	1612	rundll32.exe	26
PID 1612 wrote to memory of 788	1612	rundll32.exe	26
PID 1612 wrote to memory of 788	1612	rundll32.exe	26
PID 1612 wrote to memory of 788	1612	rundll32.exe	26

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f67fc61c3846516c3946fcc26a21853025ff6ae26ca18f5f333e7bcb0316816b.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:788

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Windows\SysWOW64\topkd.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/788-55-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/788-56-0x00000000002F0000-0x0000000000332000-memory.dmp

Filesize
264KB

Download
memory/788-58-0x00000000002F0000-0x0000000000332000-memory.dmp

Filesize
264KB

Download
memory/788-59-0x00000000002F0000-0x0000000000332000-memory.dmp

Filesize
264KB

Download