5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f

Analysis

max time kernel
150s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 22:03

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General

Target

5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe
Size

65KB
MD5

13db7a5460fd9a38f54786a695153506
SHA1

a8c3c18d82f6f0b8a12c4301cf8d8e7fc8768bbd
SHA256

5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f
SHA512

99a8580cce561b6920c0c2521bbbaa15286d2c3c0e1fd459e4ebcf6848b99756c2fc50d0e2f5201f5c7a9a937eaf9c705703c2c901d6baf12bda2b9b9fcdddf2
SSDEEP

1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/Oug:7WNqkOJWmo1HpM0MkTUmug

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-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.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
320	explorer.exe
4740	spoolsv.exe
3692	svchost.exe
2676	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\explorer.exe	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe
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

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
3916	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe
3916	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe
320	explorer.exe
320	explorer.exe
320	explorer.exe
320	explorer.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe
320	explorer.exe
320	explorer.exe
3692	svchost.exe
3692	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
320	explorer.exe
3692	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3916	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe
3916	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe
320	explorer.exe
320	explorer.exe
4740	spoolsv.exe
4740	spoolsv.exe
3692	svchost.exe
3692	svchost.exe
2676	spoolsv.exe
2676	spoolsv.exe
320	explorer.exe
320	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3916 wrote to memory of 320	3916	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe	82
PID 3916 wrote to memory of 320	3916	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe	82
PID 3916 wrote to memory of 320	3916	5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe	82
PID 320 wrote to memory of 4740	320	explorer.exe	83
PID 320 wrote to memory of 4740	320	explorer.exe	83
PID 320 wrote to memory of 4740	320	explorer.exe	83
PID 4740 wrote to memory of 3692	4740	spoolsv.exe	84
PID 4740 wrote to memory of 3692	4740	spoolsv.exe	84
PID 4740 wrote to memory of 3692	4740	spoolsv.exe	84
PID 3692 wrote to memory of 2676	3692	svchost.exe	85
PID 3692 wrote to memory of 2676	3692	svchost.exe	85
PID 3692 wrote to memory of 2676	3692	svchost.exe	85
PID 3692 wrote to memory of 5080	3692	svchost.exe	86
PID 3692 wrote to memory of 5080	3692	svchost.exe	86
PID 3692 wrote to memory of 5080	3692	svchost.exe	86
PID 3692 wrote to memory of 2520	3692	svchost.exe	101
PID 3692 wrote to memory of 2520	3692	svchost.exe	101
PID 3692 wrote to memory of 2520	3692	svchost.exe	101
PID 3692 wrote to memory of 4568	3692	svchost.exe	103
PID 3692 wrote to memory of 4568	3692	svchost.exe	103
PID 3692 wrote to memory of 4568	3692	svchost.exe	103

C:\Users\Admin\AppData\Local\Temp\5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe
"C:\Users\Admin\AppData\Local\Temp\5cb51f159da23cb3b2e5db0261292fbf971cfb12c27485e36d8b82de5058ae0f.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3916
- \??\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:320
- - \??\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:4740
  - - \??\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:3692
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2676
    - - C:\Windows\SysWOW64\at.exe
        
        at 22:05 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:5080
    - - C:\Windows\SysWOW64\at.exe
        
        at 22:06 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2520
    - - C:\Windows\SysWOW64\at.exe
        
        at 22:07 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:4568

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
65KB

MD5
6050d80f3d7f0b93ebb8dc238fdb04a8

SHA1
f6f49a04e1cd49452c9b5d0b3c8b8d552572efd2

SHA256
5c577efc5c0c6283334c44a8765db363a08db9c7a2e3d0ec3055bd808d6ca1cd

SHA512
f456a0a192fac717890c663bc1799cbcac71ed529b5f68ff4a6d96f78666a6ffa86257920869c818ff237f189935db20883a0ffbdc702db66c13644c3fb04f7e

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

Filesize
65KB

MD5
661eb68e168eb83755f6f1376a39b45c

SHA1
e925aef5b29f17d6ab38ac548f0a5afc38150066

SHA256
06b149b4615fe6c93cd970b59ce8b40240f1645c3bbe938739a0e80ef881c6d7

SHA512
57ee19b610122ff0aebc7d748b22e86efcf8091a698dd895e7287b44e366606ffe7ef5e1864dd05ea96599798b7218f073ae53e0c3ea4a79e094a35bbac47059

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

Filesize
65KB

MD5
a4b07da7fa2bd071a1fac6313c6002de

SHA1
9fc7d76cbb270c93fae0d4c62fe5329919274148

SHA256
c4e171c136ae743f9ca94bd3ff681df251f64ed31768df1b44952975ec95fee9

SHA512
3ea07e04cda883bff75f70339e156823c04550a0351eb16a79852568d4c7c95ea8292accf679007a95c53e399cbc8327fd27ca559d1891a77b6d865f38fa7de7

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

Filesize
65KB

MD5
c925b9a10d6e370081170b13d9078e81

SHA1
4a7a4cc2bce962a568297080344461b364339153

SHA256
64079d956e1af9ce21789c7f0d1e50d404f1d33583c1897f16f8f3497c96c6c2

SHA512
08a05f623f7ad42adf0966b461b2ed87ba4f00d4bdbd8e24791f30676c0d1c1d7c0842020ea3e04f1dde485487b8937b314d7526ba613a02df9474be42c69b94

Download Submit
memory/320-16-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/320-72-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/320-13-0x00000000751F0000-0x000000007534D000-memory.dmp

Filesize
1.4MB

Download
memory/320-15-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/320-61-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/320-60-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2676-45-0x00000000751F0000-0x000000007534D000-memory.dmp

Filesize
1.4MB

Download
memory/2676-53-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3692-63-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3692-36-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3692-37-0x00000000751F0000-0x000000007534D000-memory.dmp

Filesize
1.4MB

Download
memory/3692-41-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3916-57-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3916-44-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/3916-2-0x00000000751F0000-0x000000007534D000-memory.dmp

Filesize
1.4MB

Download
memory/3916-58-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/3916-5-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/3916-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

Filesize
16KB

Download
memory/3916-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3916-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4740-55-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4740-26-0x00000000751F0000-0x000000007534D000-memory.dmp

Filesize
1.4MB

Download
memory/4740-25-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download