933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071

Analysis

max time kernel
150s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
10/06/2024, 14:51

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General

Target

933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
Size

66KB
MD5

766daa59bb63db8c6743ea35e10ee3bf
SHA1

73e4b640c09ea9a74604422b6524f9cada87465d
SHA256

933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071
SHA512

86952fe8682bec94f5db178c4a5ebf294ac14ae4da28f54b7fcb4b73bbd4d159a7943237776fa616b0da4d5cee9647e1f6f4ab847f0112f029e9ecdcb32cb659
SSDEEP

1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXis:IeklMMYJhqezw/pXzH9is

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"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\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
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
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

Executes dropped EXE 4 IoCs

pid	Process
3400	explorer.exe
4232	spoolsv.exe
2844	svchost.exe
4376	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\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	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
File opened for modification	\??\c:\windows\system\spoolsv.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
2604	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
2604	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
2844	svchost.exe
2844	svchost.exe
2844	svchost.exe
3400	explorer.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
2844	svchost.exe
3400	explorer.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe
3400	explorer.exe
2844	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3400	explorer.exe
2844	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2604	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
2604	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
3400	explorer.exe
3400	explorer.exe
4232	spoolsv.exe
4232	spoolsv.exe
2844	svchost.exe
2844	svchost.exe
4376	spoolsv.exe
4376	spoolsv.exe
3400	explorer.exe
3400	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 3400	2604	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe	80
PID 2604 wrote to memory of 3400	2604	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe	80
PID 2604 wrote to memory of 3400	2604	933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe	80
PID 3400 wrote to memory of 4232	3400	explorer.exe	81
PID 3400 wrote to memory of 4232	3400	explorer.exe	81
PID 3400 wrote to memory of 4232	3400	explorer.exe	81
PID 4232 wrote to memory of 2844	4232	spoolsv.exe	82
PID 4232 wrote to memory of 2844	4232	spoolsv.exe	82
PID 4232 wrote to memory of 2844	4232	spoolsv.exe	82
PID 2844 wrote to memory of 4376	2844	svchost.exe	83
PID 2844 wrote to memory of 4376	2844	svchost.exe	83
PID 2844 wrote to memory of 4376	2844	svchost.exe	83
PID 2844 wrote to memory of 3512	2844	svchost.exe	84
PID 2844 wrote to memory of 3512	2844	svchost.exe	84
PID 2844 wrote to memory of 3512	2844	svchost.exe	84
PID 2844 wrote to memory of 1628	2844	svchost.exe	94
PID 2844 wrote to memory of 1628	2844	svchost.exe	94
PID 2844 wrote to memory of 1628	2844	svchost.exe	94
PID 2844 wrote to memory of 992	2844	svchost.exe	96
PID 2844 wrote to memory of 992	2844	svchost.exe	96
PID 2844 wrote to memory of 992	2844	svchost.exe	96

C:\Users\Admin\AppData\Local\Temp\933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe
"C:\Users\Admin\AppData\Local\Temp\933ab605c5393352301c1033a4b88613b0c47b833b8deea695a1e750f336f071.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2604
- \??\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:3400
- - \??\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:4232
  - - \??\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:2844
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:4376
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:53 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3512
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:54 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1628
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:55 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:992

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
66KB

MD5
f3f56fb4f0cc96ef75bd49cc1a79d936

SHA1
9cd7df0c3a9527781c77e1651add94b09f422e6a

SHA256
b37d8235161cef62b3e3eacd2c480db51485cec330619b713331256d4f1e580a

SHA512
c5452ad59197984fb68667be7c17d2eca625d09953783816a002cfad700d23444b7113823ebedcd1e74b67d132de9327acaa8c881be4155953fb0c1aa3e63f46

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

Filesize
66KB

MD5
f0559233ea8912ac0edd36040b9e4b2b

SHA1
23b0d585c0636db4bff00a1cc52a76f36ba10943

SHA256
e509b113127a505456f6a9209cf7a32bf8fa7be925b5747ac16c8c911e53be2e

SHA512
f9dde8059c25c0d41d18a702423c06faa0627a85cea8edacb460b46373fc26deede033480c01a05abf9fdcc5ed22f4134b6c2a9ca78ad461a8fbaa38c0cb98e2

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

Filesize
66KB

MD5
5f756fb5207dbff8952cbafbf3986695

SHA1
3993d451311ee498a8caa58cda7ac15498b2448b

SHA256
c7b53c2d3c8cd76583452be771d7df91a4850070d30e05d2b69e62d3028765dd

SHA512
ee8282afdd9f01c541dec3d8c99da7f29a62e9afd804f5224a3c5087658e133ed9411c9b6a9a05787bd56a154b3201f630f1eb9071c43c54bd38639d22c2355d

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

Filesize
66KB

MD5
11f47980450f187e30b8818f62f8d59a

SHA1
6a585f7718d3d2f854233d4bcea738043bd6c789

SHA256
53af2d32384c3391ac627bb843fc81ff60d8aac0f3e22c050023f5d991d9e531

SHA512
6fadc4ab7835124880745ca9aba7fe0f18406fd8ea586f9a2d5084af2353197f0d41fe33ad1758cb6d846875c5beec3807e5340bd045dce3f6e53c58284482b9

Download Submit
memory/2604-5-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2604-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2604-55-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2604-2-0x0000000075810000-0x000000007596D000-memory.dmp

Filesize
1.4MB

Download
memory/2604-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2604-56-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2604-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

Filesize
16KB

Download
memory/2844-60-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2844-36-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2844-37-0x0000000075810000-0x000000007596D000-memory.dmp

Filesize
1.4MB

Download
memory/2844-42-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3400-13-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3400-58-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3400-16-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3400-69-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3400-14-0x0000000075810000-0x000000007596D000-memory.dmp

Filesize
1.4MB

Download
memory/4232-54-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4232-30-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4232-25-0x0000000075810000-0x000000007596D000-memory.dmp

Filesize
1.4MB

Download
memory/4376-52-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4376-44-0x0000000075810000-0x000000007596D000-memory.dmp

Filesize
1.4MB

Download