118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c

Analysis

max time kernel
150s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 18:47

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General

Target
118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe
Size 66KB
Sample240603-xe8d7sgc23
SHA256 118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c
MD5 73d60ade7850d18c71bd35e4784460e7
SHA1 fb7c9071dd7eb4736414c481140c7a3cee8b9780
SHA512 0e5b9d94e343900db8745ccd26c9edbce00da6f43b14d6d9f39d1d56e3054994720c7609e98c9cde6d042c84512181d5ef5cac5bf526fea645cbd028e3f33606
SSDEEP 1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXia:IeklMMYJhqezw/pXzH9ia
MD5 SHA1 SHA512 SSDEEP

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-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\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 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
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

Executes dropped EXE 4 IoCs

pid	Process
3480	explorer.exe
4804	spoolsv.exe
3300	svchost.exe
3956	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"	svchost.exe
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

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	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.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
392	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe
392	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe
3480	explorer.exe
3480	explorer.exe
3480	explorer.exe
3480	explorer.exe
3480	explorer.exe
3480	explorer.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe
3300	svchost.exe
3300	svchost.exe
3480	explorer.exe
3480	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3480	explorer.exe
3300	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
392	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe
392	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe
3480	explorer.exe
3480	explorer.exe
4804	spoolsv.exe
4804	spoolsv.exe
3300	svchost.exe
3300	svchost.exe
3956	spoolsv.exe
3956	spoolsv.exe
3480	explorer.exe
3480	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 392 wrote to memory of 3480	392	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe	90
PID 392 wrote to memory of 3480	392	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe	90
PID 392 wrote to memory of 3480	392	118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe	90
PID 3480 wrote to memory of 4804	3480	explorer.exe	91
PID 3480 wrote to memory of 4804	3480	explorer.exe	91
PID 3480 wrote to memory of 4804	3480	explorer.exe	91
PID 4804 wrote to memory of 3300	4804	spoolsv.exe	92
PID 4804 wrote to memory of 3300	4804	spoolsv.exe	92
PID 4804 wrote to memory of 3300	4804	spoolsv.exe	92
PID 3300 wrote to memory of 3956	3300	svchost.exe	93
PID 3300 wrote to memory of 3956	3300	svchost.exe	93
PID 3300 wrote to memory of 3956	3300	svchost.exe	93
PID 3300 wrote to memory of 1272	3300	svchost.exe	95
PID 3300 wrote to memory of 1272	3300	svchost.exe	95
PID 3300 wrote to memory of 1272	3300	svchost.exe	95
PID 3300 wrote to memory of 3164	3300	svchost.exe	113
PID 3300 wrote to memory of 3164	3300	svchost.exe	113
PID 3300 wrote to memory of 3164	3300	svchost.exe	113
PID 3300 wrote to memory of 652	3300	svchost.exe	122
PID 3300 wrote to memory of 652	3300	svchost.exe	122
PID 3300 wrote to memory of 652	3300	svchost.exe	122

C:\Users\Admin\AppData\Local\Temp\118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe
"C:\Users\Admin\AppData\Local\Temp\118cfbee30c5d42876ea1cf2281503dfe65220e2dd09048291acdd498ef7376c.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:392
- \??\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:3480
- - \??\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:4804
  - - \??\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:3300
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:3956
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:49 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1272
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:50 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3164
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:51 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:652

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3760,i,13035806169561352434,1332896185314862791,262144 --variations-seed-version --mojo-platform-channel-handle=4240 /prefetch:8
1⤵
PID:4384

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

mrsys.exe

Path C:\Users\Admin\AppData\Roaming\mrsys.exe
Size 66KB
SHA256 47d7ec756f8000369a50b5a23ad7990f4d5fc51e838455a544fae6ea2dd13706
MD5 4f1c84fed5651450e2e42ddfe11fb572
SHA1 507d52a58d8ee98d0c9e962952113a1fbd345363
SHA512 e0ec951f6fdd9ac51d40763e12c2bee4facb68216b96632e1e8ba3d31b0fc158ca13bf9ee8f7ea6d79224ee39a98c64e2a7f8d63be6ae54652b2b94927ea56da
SSDEEP 1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXiqJ:IeklMMYJhqezw/pXzH9iqJ
MD5 SHA1 SHA512 SSDEEP

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spoolsv.exe

Path C:\Windows\System\spoolsv.exe
Size 66KB
SHA256 70c512468313d20a98868252ef56f45773a943a1af1e9d3479ca92d84356249f
MD5 2e80597f75ed52bf16294b54f5572b62
SHA1 0603d0eab8742583e28acae5433c1c0bdb78dcd1
SHA512 50553642e4460c517dd8a20f42191e2b07d38765f9083bc98910274a157e4f1e721b23f5bfc585ac2102a6968bee9e962498f6430fe40eae5344b4a59094f611
SSDEEP 1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXiv:IeklMMYJhqezw/pXzH9iv
MD5 SHA1 SHA512 SSDEEP

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svchost.exe

Path C:\Windows\System\svchost.exe
Size 66KB
SHA256 42b30aa0620860e783340f7ccfba05ae1930ea350e8d077e58f8c204f01e6e41
MD5 333c9838ad50f4d5cc4691add2d8fecd
SHA1 8954316d0fcb26f6e1941432d6d58d699a9f2946
SHA512 8fb9837809fffb5039c3019f73f78205406cb313cd67784614080481e970781c511f3d864a31e54fc5b8cde343381c779a81b0d31ff049b9b70515049ce3d748
SSDEEP 1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXih:IeklMMYJhqezw/pXzH9ih
MD5 SHA1 SHA512 SSDEEP

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explorer.exe

Path \??\c:\windows\system\explorer.exe
Size 66KB
SHA256 c38921da94b96919e428141b43f7afa9fc93df93107110191e8c5409e7216048
MD5 6e2f48e1d345af6f8372f4ed89f723b0
SHA1 07702a738a9c81c86ff89d2debd1eae8dc4f6a84
SHA512 41f9a6f0923e8fbb6d59dbda2dcaee715123731015d1554d689f1d16f84bb14dc6cd0c0d19e2193d985a266c063cceabd59a3bb6ebb2fd5132557540e26c4459
SSDEEP 1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXic:IeklMMYJhqezw/pXzH9ic
MD5 SHA1 SHA512 SSDEEP

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memory/392-5-0x0000000000401000-0x000000000042E000-memory.dmp

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memory/392-3-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/392-2-0x0000000074DD0000-0x0000000074F2D000-memory.dmp

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memory/392-57-0x00000000001C0000-0x00000000001C4000-memory.dmp

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memory/392-0-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/392-58-0x0000000000401000-0x000000000042E000-memory.dmp

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memory/392-56-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/392-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

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memory/3300-37-0x0000000074DD0000-0x0000000074F2D000-memory.dmp

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memory/3300-42-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/3300-62-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/3480-16-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/3480-13-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/3480-71-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/3480-60-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/3480-14-0x0000000074DD0000-0x0000000074F2D000-memory.dmp

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memory/3956-45-0x0000000074DD0000-0x0000000074F2D000-memory.dmp

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memory/3956-51-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/3956-44-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/4804-25-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/4804-26-0x0000000074DD0000-0x0000000074F2D000-memory.dmp

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memory/4804-55-0x0000000000400000-0x0000000000431000-memory.dmp

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memory/4804-31-0x0000000000400000-0x0000000000431000-memory.dmp

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