8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3

Analysis

max time kernel
120s
max time network
114s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-09-2024 21:26

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General

Target

8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
Size

260KB
MD5

da2fedaf4c78a65dcbaa13d3d26d9ae0
SHA1

a54a8aa2d68ea960e339521969a7904efb42f9dc
SHA256

8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3
SHA512

ba7765366686fd5e5747b316886599580282147751198ff864030b84ddc676cb9dd992e8571a98cb0d5f9de41eb02d86cce70c1bb8fc3a3bb858cff50bdc6e03
SSDEEP

3072:AygCullUQN7gsBh1L1gygCullUQN7gsBh1L1/:ARleK771qRleK771R

Score

10^/10

discovery evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
3400	explorer.exe
3752	spoolsv.exe
4376	svchost.exe
2840	spoolsv.exe

Adds Run key to start application 2 TTPs 4 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\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\System\tjud.exe	explorer.exe
File opened for modification	C:\Windows\System\tjcm.cmn	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe

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 5 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	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1952	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
1952	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe
3400	explorer.exe
3400	explorer.exe
4376	svchost.exe
4376	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3400	explorer.exe
4376	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
1952	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
1952	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
3400	explorer.exe
3400	explorer.exe
3752	spoolsv.exe
3752	spoolsv.exe
4376	svchost.exe
4376	svchost.exe
2840	spoolsv.exe
2840	spoolsv.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 3400	1952	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe	82
PID 1952 wrote to memory of 3400	1952	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe	82
PID 1952 wrote to memory of 3400	1952	8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe	82
PID 3400 wrote to memory of 3752	3400	explorer.exe	83
PID 3400 wrote to memory of 3752	3400	explorer.exe	83
PID 3400 wrote to memory of 3752	3400	explorer.exe	83
PID 3752 wrote to memory of 4376	3752	spoolsv.exe	84
PID 3752 wrote to memory of 4376	3752	spoolsv.exe	84
PID 3752 wrote to memory of 4376	3752	spoolsv.exe	84
PID 4376 wrote to memory of 2840	4376	svchost.exe	85
PID 4376 wrote to memory of 2840	4376	svchost.exe	85
PID 4376 wrote to memory of 2840	4376	svchost.exe	85

C:\Users\Admin\AppData\Local\Temp\8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe
"C:\Users\Admin\AppData\Local\Temp\8969491a3d38a0526faaaf04447a6cbbb893f194348f47ecbec7c38a524d6af3N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1952
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3400
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3752
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4376
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\mrsys.exe

Filesize
260KB

MD5
21a4fdce1bdf99ac05a62f7636c6d06f

SHA1
3a03c667657fa5479f405f68393bf7d11cd6615a

SHA256
bc3b0757f109856e7969d19088c1c7b015d043694e9f97595c751c026c717c5f

SHA512
7524f03fa142bbe9c19dbbe57f47f9a788bc39d87e0c7e7307bee59ff21d8ee3c343263f6a1084377d47b4d6801b2e2ea960fcd8e6f9305a90a63594c91197a7

Download Submit
C:\Windows\System\explorer.exe

Filesize
260KB

MD5
92bb1d8cd5648c111b34a486a293bafb

SHA1
210f6424b1cbd2ec78f2796d77d8abdc7cccfdeb

SHA256
77562f50655d7f1806b3ba538e5e1b67afaaaeb8b1658883c38964f86f0d32d2

SHA512
130c358ecbb8960e360672002543305c77f13c89b9135a4f26f39ec1d352ab34fb8beae42b76bd482c86401500e078a7cfc3ecebb75fa62cf83f5ba4608b181c

Download Submit
C:\Windows\System\spoolsv.exe

Filesize
260KB

MD5
430b040e5287d32a30a53d236bfcce08

SHA1
2f98563c4fe79c57420e46a2177f1399bb957a9b

SHA256
8377be2c927d7a65c5d9ce169084808bcae76ea8cf04550a9f2809aebd10ff62

SHA512
f06642174d0615d71574a67b005ad0ca9105376ac8e10b4481acafd4139f3f5ce818c428b89cc61ef5db14ba7774b719bb61698d9eed6b53fe7ce7833fe48e52

Download Submit
C:\Windows\System\svchost.exe

Filesize
260KB

MD5
58839fe7ec2f0d462b483066836ab7f0

SHA1
cabae5f78c7189a34459d67d4c37ba84871997b6

SHA256
ce031a3b97b11a6944b8e5240d4a431b76a9477e22c6660d674e18344574455e

SHA512
659ac99201293c7ca001a6ad61f3f42c9c43b42bbb8b012ae109834df7c4fcfdfafded4da6d2d4f19afdd0a0de96afd3274406338dbf501735fe5503227a81c7

Download Submit