3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
22-04-2024 21:09

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General

Target

3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe
Size

206KB
MD5

92ba2b484272b899b065a55ea8736932
SHA1

f20eae6446da818981bf29f0ea380a0c504051cf
SHA256

3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0
SHA512

ff546ea3e32aebb1852d64cddc2aca9eecacb430fe7b5cd3b92362ebe4583d8428b9215a5a138e2d205b780f5eadc5456b013b3747f4bded8aa7c6f1c5a3b8a7
SSDEEP

3072:5vEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6une:5vEN2U+T6i5LirrllHy4HUcMQY6j

Score

10^/10

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"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.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-1-5-21-2288054676-1871194608-3559553667-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Modifies Installed Components in the registry 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
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
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432NODE\MICROSOFT\ACTIVE SETUP\INSTALLED COMPONENTS\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
1324	explorer.exe
768	spoolsv.exe
1388	svchost.exe
4684	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\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
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\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2676	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe
2676	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe
1324	explorer.exe
1324	explorer.exe
1324	explorer.exe
1324	explorer.exe
1324	explorer.exe
1324	explorer.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe
1388	svchost.exe
1388	svchost.exe
1324	explorer.exe
1324	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1324	explorer.exe
1388	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2676	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe
2676	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe
1324	explorer.exe
1324	explorer.exe
768	spoolsv.exe
768	spoolsv.exe
1388	svchost.exe
1388	svchost.exe
4684	spoolsv.exe
4684	spoolsv.exe
1324	explorer.exe
1324	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2676 wrote to memory of 1324	2676	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe	85
PID 2676 wrote to memory of 1324	2676	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe	85
PID 2676 wrote to memory of 1324	2676	3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe	85
PID 1324 wrote to memory of 768	1324	explorer.exe	87
PID 1324 wrote to memory of 768	1324	explorer.exe	87
PID 1324 wrote to memory of 768	1324	explorer.exe	87
PID 768 wrote to memory of 1388	768	spoolsv.exe	88
PID 768 wrote to memory of 1388	768	spoolsv.exe	88
PID 768 wrote to memory of 1388	768	spoolsv.exe	88
PID 1388 wrote to memory of 4684	1388	svchost.exe	89
PID 1388 wrote to memory of 4684	1388	svchost.exe	89
PID 1388 wrote to memory of 4684	1388	svchost.exe	89
PID 1388 wrote to memory of 2528	1388	svchost.exe	90
PID 1388 wrote to memory of 2528	1388	svchost.exe	90
PID 1388 wrote to memory of 2528	1388	svchost.exe	90
PID 1388 wrote to memory of 1916	1388	svchost.exe	107
PID 1388 wrote to memory of 1916	1388	svchost.exe	107
PID 1388 wrote to memory of 1916	1388	svchost.exe	107
PID 1388 wrote to memory of 1376	1388	svchost.exe	123
PID 1388 wrote to memory of 1376	1388	svchost.exe	123
PID 1388 wrote to memory of 1376	1388	svchost.exe	123

C:\Users\Admin\AppData\Local\Temp\3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe
"C:\Users\Admin\AppData\Local\Temp\3dc8ed924f145649c4ded3f740bd627a8ae2a4adb78de9ec87248210f94387b0.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2676
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Modifies Installed Components in the registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1324
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:768
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Modifies Installed Components in the registry
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1388
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:4684
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:11 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2528
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:12 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1916
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:13 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1376

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
206KB

MD5
4f7870fc0a113a350031a1785e825ace

SHA1
1cac7775eae051aa2667296fb1c6cf092e432965

SHA256
3c5eb469cfa87b7722e01beb27ddf100bdfa8d896a3cae9754b0676fbe1ea18a

SHA512
a313eb58ced06db8308b12bdc17f543b3fc14bd60efd8351cc6a58ab703b6779368cef5483bf00501018961c211ce49a1d0c5b169e2c144dffd2b14662aa191f

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

Filesize
206KB

MD5
e478e181c9d606d326864704b7010afc

SHA1
236e33c65e12f46be68661ba32d6461ea97ef907

SHA256
312193b027c464a4aa971e5c05392e373730c7159f927912f6c39938ed9a67c3

SHA512
7c928a1d7a066720f7defc315f21b51b739f5db6b1462c78991a233fa6e310d7fc9b98e200f729b11203e2f25270a4b7a9933fdd41ef939a2b509b3e44859b55

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

Filesize
206KB

MD5
58b122d0cff744cbd7a1da2732f00a02

SHA1
7394d739867139f7aeee42f0e8bad34166ed5ca5

SHA256
73413900b2708b5504f0d0e8a409e01297723845ac1f62e4b1d9f70f6bf2ded9

SHA512
6412d3bbfb9607a5446a9dfa53daf0960b927c61db386c3d9cd88dbeafb037cc3bede9d601016dea48a506c35750f04a6f218d129156b7536e5dd94e7d749c43

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

Filesize
206KB

MD5
696ae49cb06c7762c960db1b62df8071

SHA1
39f91d1690b096e2907e71b0bcd0a8b5364442cc

SHA256
5851fcb718b355030f4648f39c92c7c65bd08eb2d0db8c033e2bcbf3e57799b4

SHA512
3bcae8616396d94511bc9fefdbf325b7f18e5ae3771af955813eb59970ec51eb9021c46989f963e9dfcdab924276f484f326ab0601f11776d41086305d746bab

Download Submit
memory/768-36-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2676-0-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2676-35-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4684-32-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download