c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c

Analysis

max time kernel
153s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
30-10-2022 05:23

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General

Target

c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe
Size

288KB
MD5

839b92b07934e02f8ffdc41aad980a79
SHA1

a252419e6e78fa327e7dcae19dc7a75b094357d0
SHA256

c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c
SHA512

976984fa798f4ac5cd41d197cc8ffd82f9c2105cb9abeda88ccb1474227d800f0fb1d11893d82e7c729cadb9175318c3df3c1dc301dc606bee0533ad9a8eecf6
SSDEEP

3072:JvEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6ungPKvLP:JvEN2U+T6i5LirrllHy4HUcMQY6lKLP

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
5040	explorer.exe
4556	spoolsv.exe
2000	svchost.exe
2024	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
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
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

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
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
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

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\explorer.exe	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.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). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1200	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe
1200	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
2000	svchost.exe
2000	svchost.exe
5040	explorer.exe
5040	explorer.exe
2000	svchost.exe
2000	svchost.exe
5040	explorer.exe
5040	explorer.exe
2000	svchost.exe
2000	svchost.exe
5040	explorer.exe
5040	explorer.exe
2000	svchost.exe
2000	svchost.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
2000	svchost.exe
2000	svchost.exe
5040	explorer.exe
5040	explorer.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe
5040	explorer.exe
2000	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
5040	explorer.exe
2000	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1200	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe
1200	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe
5040	explorer.exe
5040	explorer.exe
4556	spoolsv.exe
4556	spoolsv.exe
2000	svchost.exe
2000	svchost.exe
2024	spoolsv.exe
2024	spoolsv.exe
5040	explorer.exe
5040	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 5040	1200	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe	82
PID 1200 wrote to memory of 5040	1200	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe	82
PID 1200 wrote to memory of 5040	1200	c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe	82
PID 5040 wrote to memory of 4556	5040	explorer.exe	83
PID 5040 wrote to memory of 4556	5040	explorer.exe	83
PID 5040 wrote to memory of 4556	5040	explorer.exe	83
PID 4556 wrote to memory of 2000	4556	spoolsv.exe	84
PID 4556 wrote to memory of 2000	4556	spoolsv.exe	84
PID 4556 wrote to memory of 2000	4556	spoolsv.exe	84
PID 2000 wrote to memory of 2024	2000	svchost.exe	85
PID 2000 wrote to memory of 2024	2000	svchost.exe	85
PID 2000 wrote to memory of 2024	2000	svchost.exe	85
PID 2000 wrote to memory of 1052	2000	svchost.exe	86
PID 2000 wrote to memory of 1052	2000	svchost.exe	86
PID 2000 wrote to memory of 1052	2000	svchost.exe	86
PID 2000 wrote to memory of 996	2000	svchost.exe	95
PID 2000 wrote to memory of 996	2000	svchost.exe	95
PID 2000 wrote to memory of 996	2000	svchost.exe	95
PID 2000 wrote to memory of 1264	2000	svchost.exe	97
PID 2000 wrote to memory of 1264	2000	svchost.exe	97
PID 2000 wrote to memory of 1264	2000	svchost.exe	97

C:\Users\Admin\AppData\Local\Temp\c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe
"C:\Users\Admin\AppData\Local\Temp\c54917d0c61bbbf56fb53a698f45f13f8884f9391b357030a86775e49455385c.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1200
- \??\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:5040
- - \??\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:4556
  - - \??\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:2000
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2024
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:01 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1052
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:02 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:996
    - - C:\Windows\SysWOW64\at.exe
        
        at 18:03 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1264

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
287KB

MD5
ec0edc6605559181df99dd463ed43fa5

SHA1
5e71cfc9bd5715aa6d5862b94395ba625d7fded2

SHA256
693ab1a14e8e98e7167bf86094606c7af384fee2f6e3f5f0ebc328ccd5d13539

SHA512
5159f40c70971cb34b9ef4d6c4c981d9968abde3fe182662aad945d17c791e12f91c5d319ea9539e4a674a5de6fbdbb188190aae9cf565c28344947bb38002d0

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

Filesize
288KB

MD5
78852e0bb138b5ef63c451ad1af65463

SHA1
c9ade061d64d30dd084428696fcbc6230834840f

SHA256
63d40ef08b449d8408c855a9dccc849687fc27bbb5355206e63bc91cd833bc71

SHA512
b8d7f799de526b292ce31d6936ac871ad0c4579324b1e0632da7cdb03b88075c6970b24ebb99acff2cd69be070749167d40373667b1eb5f0cb3a1daaa4115132

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

Filesize
287KB

MD5
688361a33c0f896b162a66d5d826c23e

SHA1
75deed446254f2748bf5d82b752c8bdf6a15522f

SHA256
4037328a4521264534239881c300ab43defd121eaf8a5d660faf270ff6a4c6cd

SHA512
2d38404b021ec7b988afe3ba3959eae2e7df5f568d6e90297b03262c6a4c5960d0d367fbd884ed5f8502f43fe29081ede660f931f25951fc5529b742e6f142d3

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

Filesize
287KB

MD5
688361a33c0f896b162a66d5d826c23e

SHA1
75deed446254f2748bf5d82b752c8bdf6a15522f

SHA256
4037328a4521264534239881c300ab43defd121eaf8a5d660faf270ff6a4c6cd

SHA512
2d38404b021ec7b988afe3ba3959eae2e7df5f568d6e90297b03262c6a4c5960d0d367fbd884ed5f8502f43fe29081ede660f931f25951fc5529b742e6f142d3

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

Filesize
288KB

MD5
f220500689583a00aecf386bcf16da53

SHA1
68c3082f5ea122a6f6e71b124d53bc8ff3e57c99

SHA256
46b5f00b1ec827528d65d8c3744560dca6b5847b0afc0fb5f274adc748e8c123

SHA512
fdd253fd4da0486bdcb4243f31d6a61d08759b8fe806a2cc0e7436abd6df9ea7346316d4d4d044e81b86309908c0bc16c79ab14b1f6ae2ad102b73436a551c56

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

Filesize
288KB

MD5
78852e0bb138b5ef63c451ad1af65463

SHA1
c9ade061d64d30dd084428696fcbc6230834840f

SHA256
63d40ef08b449d8408c855a9dccc849687fc27bbb5355206e63bc91cd833bc71

SHA512
b8d7f799de526b292ce31d6936ac871ad0c4579324b1e0632da7cdb03b88075c6970b24ebb99acff2cd69be070749167d40373667b1eb5f0cb3a1daaa4115132

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

Filesize
287KB

MD5
688361a33c0f896b162a66d5d826c23e

SHA1
75deed446254f2748bf5d82b752c8bdf6a15522f

SHA256
4037328a4521264534239881c300ab43defd121eaf8a5d660faf270ff6a4c6cd

SHA512
2d38404b021ec7b988afe3ba3959eae2e7df5f568d6e90297b03262c6a4c5960d0d367fbd884ed5f8502f43fe29081ede660f931f25951fc5529b742e6f142d3

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

Filesize
288KB

MD5
f220500689583a00aecf386bcf16da53

SHA1
68c3082f5ea122a6f6e71b124d53bc8ff3e57c99

SHA256
46b5f00b1ec827528d65d8c3744560dca6b5847b0afc0fb5f274adc748e8c123

SHA512
fdd253fd4da0486bdcb4243f31d6a61d08759b8fe806a2cc0e7436abd6df9ea7346316d4d4d044e81b86309908c0bc16c79ab14b1f6ae2ad102b73436a551c56

Download Submit
memory/1200-163-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1200-132-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/2000-156-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/2000-169-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/2024-162-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/4556-164-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/4556-154-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/5040-168-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/5040-153-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download