3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30

Analysis

max time kernel
150s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 20:35

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General

Target

3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
Size

65KB
MD5

ca3803799e2756c25418d591cd8ee1f3
SHA1

4f573f5eaec79200c67dcffbe356810fd1e019ab
SHA256

3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30
SHA512

767328e4e27188e4c22d82210f22dc959f5ecedabe60c61d44896440d03d17f3ca2e59b6e88777a24d7e023762f1d850f3a1d8092e88b87a35fa5b36cb249e17
SSDEEP

1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/Ouw:7WNqkOJWmo1HpM0MkTUmuw

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-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\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\{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
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe

Executes dropped EXE 4 IoCs

pid	Process
3788	explorer.exe
3920	spoolsv.exe
1732	svchost.exe
1436	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\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
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\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.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

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
1272	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
1272	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
1732	svchost.exe
1732	svchost.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
3788	explorer.exe
1732	svchost.exe
1732	svchost.exe
1732	svchost.exe
3788	explorer.exe
3788	explorer.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
3788	explorer.exe
1732	svchost.exe
3788	explorer.exe
1732	svchost.exe
1732	svchost.exe
3788	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3788	explorer.exe
1732	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1272	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
1272	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
3788	explorer.exe
3788	explorer.exe
3920	spoolsv.exe
3920	spoolsv.exe
1732	svchost.exe
1732	svchost.exe
1436	spoolsv.exe
1436	spoolsv.exe
3788	explorer.exe
3788	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 3788	1272	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe	84
PID 1272 wrote to memory of 3788	1272	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe	84
PID 1272 wrote to memory of 3788	1272	3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe	84
PID 3788 wrote to memory of 3920	3788	explorer.exe	85
PID 3788 wrote to memory of 3920	3788	explorer.exe	85
PID 3788 wrote to memory of 3920	3788	explorer.exe	85
PID 3920 wrote to memory of 1732	3920	spoolsv.exe	87
PID 3920 wrote to memory of 1732	3920	spoolsv.exe	87
PID 3920 wrote to memory of 1732	3920	spoolsv.exe	87
PID 1732 wrote to memory of 1436	1732	svchost.exe	89
PID 1732 wrote to memory of 1436	1732	svchost.exe	89
PID 1732 wrote to memory of 1436	1732	svchost.exe	89
PID 1732 wrote to memory of 1988	1732	svchost.exe	90
PID 1732 wrote to memory of 1988	1732	svchost.exe	90
PID 1732 wrote to memory of 1988	1732	svchost.exe	90
PID 1732 wrote to memory of 4120	1732	svchost.exe	101
PID 1732 wrote to memory of 4120	1732	svchost.exe	101
PID 1732 wrote to memory of 4120	1732	svchost.exe	101
PID 1732 wrote to memory of 2612	1732	svchost.exe	103
PID 1732 wrote to memory of 2612	1732	svchost.exe	103
PID 1732 wrote to memory of 2612	1732	svchost.exe	103

C:\Users\Admin\AppData\Local\Temp\3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe
"C:\Users\Admin\AppData\Local\Temp\3c325ef1d3dc67640d0adab5c879d592d2ba27c178817bc1b656fa8645695a30.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1272
- \??\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:3788
- - \??\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:3920
  - - \??\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:1732
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:1436
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:38 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1988
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:39 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:4120
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:40 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2612

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
bf13e5ada1207bb13e1eb53eb8b990c5

SHA1
766a1c47aaa4adf47728d33a74bfe2fc8c90b2f9

SHA256
ccac8131c84eab8abee6ee75f6503be92fd4a67730675938536fa6daf9417630

SHA512
a73daac19b518df5e42603bae51caa0f340f4e0b294b1718183e5f4a7bd9b84f5b5acf3e147c272b1c5d35600005f209449cdef8df11d6246066e691b8ee58fd

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

Filesize
65KB

MD5
3d7f5d1af7d50ee82e1e20131c9dce70

SHA1
a4b5642d1f74fc2c099d1b39e93c4919226c0734

SHA256
ebc19bbb3e364592279f2334dffff6b159ec4c1ba6bafc0bc29c7cf7a870abf2

SHA512
effac6b7d6750d752750ea5bed38b8a3686d859de6ebd009b654a817903bea5aedc69c68fe65fb9cbf6c185b8024ce50dcb632113dcae51ff6b2ed544b807f66

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

Filesize
65KB

MD5
155b761e51877501795a0b319033ca1c

SHA1
432ee22656a77c52a501e717a1721fc565ad5aeb

SHA256
f0aa30d0c6ea45b79bf4c1c21dcee4ca07c920fb713a4f1b3ca9499f4420a49c

SHA512
7de83b3fba8f31382b19bbea60c31867eb0031a67ca1645913b6fdc6dac8e06e761d46ab7666bfa7d474ccb46c364b83cc5379d5cced0383f00a0dbdfd86f5b4

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

Filesize
65KB

MD5
5fd2f0b99ffcb8137e592761ce7e0b69

SHA1
842cd42dc8e690d0e94063e769ab7feb335760dc

SHA256
b1af5f30e3d44da755617d5a35e2e9ddbab53503e05fc235d77a581967ee6f01

SHA512
474eb016890ccedd30af182b081c304e95d187bc3287860597812d34f3f68218950c804d0ca7c37159c1a9fd4295d9ae87d2db8f8ab1741e7eea22aaf667847d

Download Submit
memory/1272-4-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1272-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1272-57-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1272-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1272-2-0x0000000075A70000-0x0000000075BCD000-memory.dmp

Filesize
1.4MB

Download
memory/1272-56-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1272-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

Filesize
16KB

Download
memory/1436-44-0x0000000075A70000-0x0000000075BCD000-memory.dmp

Filesize
1.4MB

Download
memory/1436-50-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1732-61-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1732-36-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1732-37-0x0000000075A70000-0x0000000075BCD000-memory.dmp

Filesize
1.4MB

Download
memory/1732-41-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3788-13-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3788-59-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3788-17-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3788-70-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3788-14-0x0000000075A70000-0x0000000075BCD000-memory.dmp

Filesize
1.4MB

Download
memory/3920-54-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3920-29-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3920-25-0x0000000075A70000-0x0000000075BCD000-memory.dmp

Filesize
1.4MB

Download