fff5894a30bbb549b65691ae104a6181f281cb36ea148dc48fb8b6ab3363c995

General

Target
fff5894a30bbb549b65691ae104a6181f281cb36ea148dc48fb8b6ab3363c995.dll
Size 2.1MB
Sample241104-r1972a1eme
SHA256 fff5894a30bbb549b65691ae104a6181f281cb36ea148dc48fb8b6ab3363c995
MD5 6b6ab419d4969810922a8b3c2e465b94
SHA1 49dfbe5176671a485326a427dda8cb27c584b174
SHA512 d6f6c7737992d9d3cafb9447bdb039bde15ae1d4e826ad422d1d8e7613b0a361135f8d7ae6b6699ced329cad2162dae7e7f5cda214855992ebf07ee698a4b1d8
SSDEEP 49152:vwL7s8tLKVVbhhEmyGGIBPk8gI8/J6w2aMxqu6J+b0xfJYsm:cs5VxhhEmyGGIBPp78/J65xqu6wb0xf7
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

discovery evasion trojan

Malware Config

Signatures

UAC bypass 3 TTPs 2 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	rundll32.exe

Blocklisted process makes network request 2 IoCs

flow	pid	Process
6	2700	rundll32.exe
9	2700	rundll32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\V:	rundll32.exe
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\J:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\Q:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe
File opened (read-only)	\??\X:	rundll32.exe
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\I:	rundll32.exe
File opened (read-only)	\??\E:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	rundll32.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2700	rundll32.exe
2700	rundll32.exe
2700	rundll32.exe
2700	rundll32.exe
2700	rundll32.exe
2700	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2700	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 2700	4772	rundll32.exe	84
PID 4772 wrote to memory of 2700	4772	rundll32.exe	84
PID 4772 wrote to memory of 2700	4772	rundll32.exe	84

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fff5894a30bbb549b65691ae104a6181f281cb36ea148dc48fb8b6ab3363c995.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fff5894a30bbb549b65691ae104a6181f281cb36ea148dc48fb8b6ab3363c995.dll,#1
  2⤵
  - UAC bypass
  - Blocklisted process makes network request
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - System policy modification
  PID:2700