b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689

Analysis

max time kernel
152s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07-11-2022 05:26

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General

Target

b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe
Size

122KB
MD5

052987e8936df481fcfc85ddf9e6fee6
SHA1

4fb863617d76cbe1572df02c6e0c951b3ea9d731
SHA256

b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689
SHA512

27e6a53a9d678e50d1c982f6376b824445064cb80c0ad8d3ea7e7f1751e6e9def9823ca8bafe509bc322fb0ed8ebf125479b624a3ceecb377dee88ab6cfd5eef
SSDEEP

1536:nFyzF9MFVCujlsQoeQZZ86ukpj0nGGF9v+4DR5X:FyzQVCujl71QZZ4kp4F9Xtx

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

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

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
544	explorer.exe
3936	spoolsv.exe
4896	svchost.exe
2460	spoolsv.exe

Modifies Installed Components in the registry 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
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
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

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	explorer.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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	svchost.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 6 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\explorer.exe	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.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). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3712	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe
3712	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe
544	explorer.exe
544	explorer.exe
4896	svchost.exe
4896	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
544	explorer.exe
4896	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
3712	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe
3712	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe
544	explorer.exe
544	explorer.exe
3936	spoolsv.exe
3936	spoolsv.exe
4896	svchost.exe
4896	svchost.exe
2460	spoolsv.exe
2460	spoolsv.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3712 wrote to memory of 544	3712	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe	80
PID 3712 wrote to memory of 544	3712	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe	80
PID 3712 wrote to memory of 544	3712	b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe	80
PID 544 wrote to memory of 3936	544	explorer.exe	81
PID 544 wrote to memory of 3936	544	explorer.exe	81
PID 544 wrote to memory of 3936	544	explorer.exe	81
PID 3936 wrote to memory of 4896	3936	spoolsv.exe	82
PID 3936 wrote to memory of 4896	3936	spoolsv.exe	82
PID 3936 wrote to memory of 4896	3936	spoolsv.exe	82
PID 4896 wrote to memory of 2460	4896	svchost.exe	83
PID 4896 wrote to memory of 2460	4896	svchost.exe	83
PID 4896 wrote to memory of 2460	4896	svchost.exe	83

C:\Users\Admin\AppData\Local\Temp\b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe
"C:\Users\Admin\AppData\Local\Temp\b095b45efce9e6ac37c9081b9d4ac79f076b43c3d44eddc8f9ab6281b4a40689.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3712
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Executes dropped EXE
  - Modifies Installed Components in the registry
  - 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:544
- - \??\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:3936
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Executes dropped EXE
      Modifies Installed Components in the registry
      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:4896
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2460

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

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
122KB

MD5
76726a9daedc6df811c5d55b5148de03

SHA1
cfaebd97f26a509152e52f76d179fa329f1f5ba4

SHA256
59bffd58ddec85b901478994562bb477bacafc81dc2685c3f64cf9f51a7250b7

SHA512
45fe66b5de243749ab0ab197c4d66561c9627ef9048cd493cc64f9ee8678d0ede72d31134558237100677fa6dcf3254c493cdafb76dd3300bd2e78229f3e8e5d

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

Filesize
122KB

MD5
d5a3f3bfa5b8c3fa1f3b93d49f33037c

SHA1
ced2d546b26087950ba963923990d46334782887

SHA256
0f7de3c127c86740a6dfeea274ddef9e624feca3b20333f705c089190fcdc06e

SHA512
8298d1aa66a7e0a90539769cd3111209004a3948217c094907389fd71e6ef7ef8ae29e90dc627985cab019b0b6b706868712772794aa9be605d0bbf5cc81d3a2

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

Filesize
122KB

MD5
06cb2a9f8f7f706015554b633426b8b2

SHA1
820469287901ac1854371ebe6a8dd03593d4eb24

SHA256
e42720f0fa7dda6d063ffe2ddcca9838e73a4540891b095e6e93985bd58a65db

SHA512
ea8422053caf2300cfe7dcc61f8f3e2face69e3ba524c60e397552b3904e9d83ecd00c9b704b1860ef607f1a46595b769b451e1c06bab6d21ea43074b6ad22ea

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

Filesize
122KB

MD5
06cb2a9f8f7f706015554b633426b8b2

SHA1
820469287901ac1854371ebe6a8dd03593d4eb24

SHA256
e42720f0fa7dda6d063ffe2ddcca9838e73a4540891b095e6e93985bd58a65db

SHA512
ea8422053caf2300cfe7dcc61f8f3e2face69e3ba524c60e397552b3904e9d83ecd00c9b704b1860ef607f1a46595b769b451e1c06bab6d21ea43074b6ad22ea

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

Filesize
122KB

MD5
b19d48d0ed07f2ebeb885ff8af128405

SHA1
804ef6f3eb53e20a574027793c384659b5152c44

SHA256
3544e7ad42d72989e1517a2c9fe33f3fadecde8a6f66bb4bba7d200a6ffcb4cb

SHA512
bd100e6ca1ba4b3daab13fd6cfe4bb0659f981b21ac91ccbc494ee4794b2c250758da327883fe7d901f2e5d2afe65462a2ad731a77652baee50ca367eaa982b2

Download Submit
\??\c:\windows\system\explorer.exe

Filesize
122KB

MD5
d5a3f3bfa5b8c3fa1f3b93d49f33037c

SHA1
ced2d546b26087950ba963923990d46334782887

SHA256
0f7de3c127c86740a6dfeea274ddef9e624feca3b20333f705c089190fcdc06e

SHA512
8298d1aa66a7e0a90539769cd3111209004a3948217c094907389fd71e6ef7ef8ae29e90dc627985cab019b0b6b706868712772794aa9be605d0bbf5cc81d3a2

Download Submit
\??\c:\windows\system\spoolsv.exe

Filesize
122KB

MD5
06cb2a9f8f7f706015554b633426b8b2

SHA1
820469287901ac1854371ebe6a8dd03593d4eb24

SHA256
e42720f0fa7dda6d063ffe2ddcca9838e73a4540891b095e6e93985bd58a65db

SHA512
ea8422053caf2300cfe7dcc61f8f3e2face69e3ba524c60e397552b3904e9d83ecd00c9b704b1860ef607f1a46595b769b451e1c06bab6d21ea43074b6ad22ea

Download Submit
\??\c:\windows\system\svchost.exe

Filesize
122KB

MD5
b19d48d0ed07f2ebeb885ff8af128405

SHA1
804ef6f3eb53e20a574027793c384659b5152c44

SHA256
3544e7ad42d72989e1517a2c9fe33f3fadecde8a6f66bb4bba7d200a6ffcb4cb

SHA512
bd100e6ca1ba4b3daab13fd6cfe4bb0659f981b21ac91ccbc494ee4794b2c250758da327883fe7d901f2e5d2afe65462a2ad731a77652baee50ca367eaa982b2

Download Submit