76e838fcc3bee359645efd41a1b05362cb6d787f9c5008966517351fed2cb228

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08/09/2024, 17:17

Target

76e838fcc3bee359645efd41a1b05362cb6d787f9c5008966517351fed2cb228.dll
Size

854KB
MD5

4436b2975cfea99a1b73ba9b87cd71e4
SHA1

35fba2952470d46bd6a580f8029fa624749c17fd
SHA256

76e838fcc3bee359645efd41a1b05362cb6d787f9c5008966517351fed2cb228
SHA512

58bf4c71d3c53a170a13058cc9d0e662457044de311d87fde4748965bdd031cb54aa3377dbde52d1a68cd27e0a2ef567c29f03ca815dbc0c0c67c65dd872b47b
SSDEEP

768:HV1cEy9lm1s503mEP6Q9htGnTED4iT3vyR0ZMeSNCTD/6kpLRmNMjxW7lDETcT:11nZWEP6QjmTiuQSNCnTpLsMEd+c

Score

7^/10

Executes dropped EXE 1 IoCs

pid	Process
1688	ahnlab.exe

Loads dropped DLL 2 IoCs

pid	Process
1996	rundll32.exe
1996	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\mismyou = "C:\\ProgramData\\ahnlab.exe"	ahnlab.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004
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 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

System Language Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ahnlab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1688	ahnlab.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1688	ahnlab.exe
1688	ahnlab.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 1996	2292	rundll32.exe	28
PID 2292 wrote to memory of 1996	2292	rundll32.exe	28
PID 2292 wrote to memory of 1996	2292	rundll32.exe	28
PID 2292 wrote to memory of 1996	2292	rundll32.exe	28
PID 2292 wrote to memory of 1996	2292	rundll32.exe	28
PID 2292 wrote to memory of 1996	2292	rundll32.exe	28
PID 2292 wrote to memory of 1996	2292	rundll32.exe	28
PID 1996 wrote to memory of 1688	1996	rundll32.exe	29
PID 1996 wrote to memory of 1688	1996	rundll32.exe	29
PID 1996 wrote to memory of 1688	1996	rundll32.exe	29
PID 1996 wrote to memory of 1688	1996	rundll32.exe	29
PID 1688 wrote to memory of 1704	1688	ahnlab.exe	30
PID 1688 wrote to memory of 1704	1688	ahnlab.exe	30
PID 1688 wrote to memory of 1704	1688	ahnlab.exe	30
PID 1688 wrote to memory of 1704	1688	ahnlab.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\76e838fcc3bee359645efd41a1b05362cb6d787f9c5008966517351fed2cb228.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\76e838fcc3bee359645efd41a1b05362cb6d787f9c5008966517351fed2cb228.dll,#1
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1996
- - C:\ProgramData\ahnlab.exe
    C:\ProgramData\ahnlab.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1688
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\PROGRA~3\ahnlab.exe > nul
      4⤵
      System Location Discovery: System Language Discovery
      PID:1704