9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
30/05/2024, 00:29

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General

Target

9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe
Size

66KB
MD5

8568bba8a57f05d22055022ee5c48fe2
SHA1

fdde30c3c97da81e83b64719ba8b34cc6780f853
SHA256

9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada
SHA512

5b9d65a08f41f026d7c0cb785488f81959b07b30405177de0f64ffa0d9a6fac20eb3baa4a6c503bc26c31cb59257fbd14a354976d6ea5813ab2e7c21349912d7
SSDEEP

1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXiC:IeklMMYJhqezw/pXzH9iC

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-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\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 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
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

Executes dropped EXE 4 IoCs

pid	Process
3048	explorer.exe
2564	spoolsv.exe
2864	svchost.exe
2624	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe
2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe
3048	explorer.exe
3048	explorer.exe
2564	spoolsv.exe
2564	spoolsv.exe
2864	svchost.exe
2864	svchost.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	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.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
2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe
3048	explorer.exe
3048	explorer.exe
3048	explorer.exe
3048	explorer.exe
2864	svchost.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe
2864	svchost.exe
3048	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3048	explorer.exe
2864	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe
2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe
3048	explorer.exe
3048	explorer.exe
2564	spoolsv.exe
2564	spoolsv.exe
2864	svchost.exe
2864	svchost.exe
2624	spoolsv.exe
2624	spoolsv.exe
3048	explorer.exe
3048	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2912 wrote to memory of 3048	2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe	28
PID 2912 wrote to memory of 3048	2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe	28
PID 2912 wrote to memory of 3048	2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe	28
PID 2912 wrote to memory of 3048	2912	9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe	28
PID 3048 wrote to memory of 2564	3048	explorer.exe	29
PID 3048 wrote to memory of 2564	3048	explorer.exe	29
PID 3048 wrote to memory of 2564	3048	explorer.exe	29
PID 3048 wrote to memory of 2564	3048	explorer.exe	29
PID 2564 wrote to memory of 2864	2564	spoolsv.exe	30
PID 2564 wrote to memory of 2864	2564	spoolsv.exe	30
PID 2564 wrote to memory of 2864	2564	spoolsv.exe	30
PID 2564 wrote to memory of 2864	2564	spoolsv.exe	30
PID 2864 wrote to memory of 2624	2864	svchost.exe	31
PID 2864 wrote to memory of 2624	2864	svchost.exe	31
PID 2864 wrote to memory of 2624	2864	svchost.exe	31
PID 2864 wrote to memory of 2624	2864	svchost.exe	31
PID 2864 wrote to memory of 2504	2864	svchost.exe	32
PID 2864 wrote to memory of 2504	2864	svchost.exe	32
PID 2864 wrote to memory of 2504	2864	svchost.exe	32
PID 2864 wrote to memory of 2504	2864	svchost.exe	32
PID 2864 wrote to memory of 1632	2864	svchost.exe	36
PID 2864 wrote to memory of 1632	2864	svchost.exe	36
PID 2864 wrote to memory of 1632	2864	svchost.exe	36
PID 2864 wrote to memory of 1632	2864	svchost.exe	36
PID 2864 wrote to memory of 1904	2864	svchost.exe	38
PID 2864 wrote to memory of 1904	2864	svchost.exe	38
PID 2864 wrote to memory of 1904	2864	svchost.exe	38
PID 2864 wrote to memory of 1904	2864	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe
"C:\Users\Admin\AppData\Local\Temp\9357c511ac6e9bf7c09690a0989661a942ad8a2f6c5f0ebc7b158302fdebaada.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2912
- \??\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
  - Loads dropped DLL
  - 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:3048
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2564
  - - \??\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
      Loads dropped DLL
      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:2864
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2624
    - - C:\Windows\SysWOW64\at.exe
        
        at 00:31 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2504
    - - C:\Windows\SysWOW64\at.exe
        
        at 00:32 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1632
    - - C:\Windows\SysWOW64\at.exe
        
        at 00:33 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1904

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
8e91f9940a188815afe5248a730a96b8

SHA1
dc1e93683c1bf66ba1dca191916b589a25a087d4

SHA256
e9d0a22eb7bea564d8b66ab3483742712f03f735893fe79e473146f36732e935

SHA512
8a5c40ae2da770f5be2d18515437a199caa0e189fafee91dba686742f49885df1975b8b9be071ac0cac291e03e700d3df9d7871a341963b78976ed33b1142515

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

Filesize
66KB

MD5
30c533e898e97345ef4644a7f1a62ce6

SHA1
4b24c53e3734ccdea8ff33c7a027545c28876075

SHA256
7727a1b5e3001433eb2bbb72615a8aa2503f77ca0e35d29216b6196f57379d09

SHA512
58df2896dc11a9c4bf65c3eec25882bb996007842fb50a61c07762e515c613b255188d79a3c95767bfbc865e675ee935f486f0cc6800f06174e1ceb788a2d44f

Download Submit
\Windows\system\explorer.exe

Filesize
66KB

MD5
b37c605d748dbe1ba4117c2c9ad7266a

SHA1
2ce5aa48ccb2ffd29475161faf5182aa0d0c8052

SHA256
4ae47760c3744699edd27d0b39db5ed0f189eef1da6ac795a4a9b00f6b016624

SHA512
7c7eec441dedca31e28c60c4c08977761486e1597d7814d9a484c2ea47065d0c1b4a0f8af583526145ead833aa3e94ffe6e50f45ebbf20064cc1719c7daddcea

Download Submit
\Windows\system\spoolsv.exe

Filesize
66KB

MD5
ae322811bc28e5160a617c2a84205966

SHA1
5a901b97932530b17b28327ac9cdd5e111edd43d

SHA256
a760be87bc3994176a8c951b2c550daf0997a1fa5ce75fa44faf20df8a103d3c

SHA512
2b8e280db7698b13937a737986505b2d13a059b7195863642ccf8d071ec6c24b213c49f72dbc2b362de7cdde504064822970f309d556bcfce189cfc5d451a1b3

Download Submit
memory/2564-38-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2564-43-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2564-54-0x0000000000550000-0x0000000000581000-memory.dmp

Filesize
196KB

Download
memory/2564-77-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2624-66-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2624-72-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2624-73-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2864-63-0x00000000023E0000-0x0000000002411000-memory.dmp

Filesize
196KB

Download
memory/2864-55-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/2864-83-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2864-59-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2912-17-0x0000000002C40000-0x0000000002C71000-memory.dmp

Filesize
196KB

Download
memory/2912-1-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2912-79-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2912-3-0x0000000000020000-0x0000000000024000-memory.dmp

Filesize
16KB

Download
memory/2912-4-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2912-78-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2912-70-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2912-2-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2912-0-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download
memory/3048-18-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3048-36-0x00000000030D0000-0x0000000003101000-memory.dmp

Filesize
196KB

Download
memory/3048-37-0x00000000030D0000-0x0000000003101000-memory.dmp

Filesize
196KB

Download
memory/3048-25-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3048-81-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3048-19-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3048-92-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3048-20-0x0000000072940000-0x0000000072A93000-memory.dmp

Filesize
1.3MB

Download