b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d

Analysis

max time kernel
150s
max time network
101s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 01:27

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General

Target

b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe
Size

66KB
MD5

6435f34e6f9444ad3cfbfac52afa0779
SHA1

93c130fcfeb99ee78fc2d7c60c230fd70d983de8
SHA256

b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d
SHA512

fa3f23a5734b08dc721ee523e603a314c15b5eb9ac7601dfac1e3984b17b8f2c1c656c3e33a7edc370b5f24399b82b64b51de428d79f7b58ae7c0f0f7fc027e9
SSDEEP

1536:EHfetdklPp+07gDSrB8Xru2zGeJxgawTzpXzrDJrXiTZZZZZZZZZZZZZZZZZZZZG:IeklMMYJhqezw/pXzH9ii

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-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\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\{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

Executes dropped EXE 4 IoCs

pid	Process
2656	explorer.exe
3668	spoolsv.exe
3100	svchost.exe
1592	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"	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\explorer.exe	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.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).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1520	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe
1520	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe
2656	explorer.exe
2656	explorer.exe
2656	explorer.exe
2656	explorer.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe
2656	explorer.exe
2656	explorer.exe
3100	svchost.exe
3100	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2656	explorer.exe
3100	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1520	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe
1520	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe
2656	explorer.exe
2656	explorer.exe
3668	spoolsv.exe
3668	spoolsv.exe
3100	svchost.exe
3100	svchost.exe
1592	spoolsv.exe
1592	spoolsv.exe
2656	explorer.exe
2656	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2656	1520	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe	85
PID 1520 wrote to memory of 2656	1520	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe	85
PID 1520 wrote to memory of 2656	1520	b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe	85
PID 2656 wrote to memory of 3668	2656	explorer.exe	86
PID 2656 wrote to memory of 3668	2656	explorer.exe	86
PID 2656 wrote to memory of 3668	2656	explorer.exe	86
PID 3668 wrote to memory of 3100	3668	spoolsv.exe	87
PID 3668 wrote to memory of 3100	3668	spoolsv.exe	87
PID 3668 wrote to memory of 3100	3668	spoolsv.exe	87
PID 3100 wrote to memory of 1592	3100	svchost.exe	88
PID 3100 wrote to memory of 1592	3100	svchost.exe	88
PID 3100 wrote to memory of 1592	3100	svchost.exe	88
PID 3100 wrote to memory of 3996	3100	svchost.exe	89
PID 3100 wrote to memory of 3996	3100	svchost.exe	89
PID 3100 wrote to memory of 3996	3100	svchost.exe	89
PID 3100 wrote to memory of 4360	3100	svchost.exe	105
PID 3100 wrote to memory of 4360	3100	svchost.exe	105
PID 3100 wrote to memory of 4360	3100	svchost.exe	105
PID 3100 wrote to memory of 3036	3100	svchost.exe	114
PID 3100 wrote to memory of 3036	3100	svchost.exe	114
PID 3100 wrote to memory of 3036	3100	svchost.exe	114

C:\Users\Admin\AppData\Local\Temp\b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe
"C:\Users\Admin\AppData\Local\Temp\b6138581b11f392e2e3bfb0a7e3677a9a94540240504738b2213cc1d61f03c1d.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1520
- \??\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:2656
- - \??\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:3668
  - - \??\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:3100
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:1592
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:30 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3996
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:31 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:4360
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:32 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3036

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
7a696f85687f6b1c1e84bf39fb234c75

SHA1
c266f8d522a27f7f230ce594e3c39f6771ea4ad4

SHA256
f4edb5e7120b47e67f0eaf245bb2506edc07d71eef6dd5a32468cac14aced73d

SHA512
0b5d1b198a43dd1988d0db62ce3b8f0a62ff51b35db35a480aec58e42f288a43158ee029e4329cf429bf21c54b2e53cf7292fe08ecdd86be5c7de84f0aac734f

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

Filesize
66KB

MD5
50f5d575601ec065c684f2d4b6242a1a

SHA1
a412691e4ee90bd0b22a4ddc56bb8d4cc8e9899f

SHA256
2521f397ca752259ac83202ab7c4285879ac444604ff4b3fa747283c6a05ede2

SHA512
599503024b5173c58dfe8156d151b796c68d771c67dcfbf862ddc72c42e827fae5911f5bdb8a686bd69f5232b3b535ac9b9084fd4e0cde87d9c9c12121874fd3

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

Filesize
66KB

MD5
bbe63c6858888a104c13d2c41f700295

SHA1
9069b2f1a42ef4f41b3ac86b69e4615578c50374

SHA256
38738f172e6ee603398e71efb1b910cdd694766f1ddbfe8e02f9a1297841b545

SHA512
56fdf31058b9f6b33c3dddd281b0df591a4461bd1368b97c58ec441ba8508b63928b20aed1c9eeca17f2f19ec963254ee016d93bb08c37cf8ecb7c5f4000213f

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

Filesize
66KB

MD5
4c76d9144b135e60c392c1ed28322386

SHA1
c5f9edb425bda58785413d71e99267d35cc7622b

SHA256
537ce0cd6b8bb4b0e1f7f0492c9343dd16be46df2ec65b6257c02d9d9cd1a298

SHA512
b2351fd2496b6ed7a8455065ee43a83dc2de63bb654de59402fabdfe899c667265c05a84ea037f4a46bb946c173d9640a5ef46eede9d5391563b02ffc893c394

Download Submit
memory/1520-55-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1520-57-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1520-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1520-2-0x0000000075080000-0x00000000751DD000-memory.dmp

Filesize
1.4MB

Download
memory/1520-5-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1520-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

Filesize
16KB

Download
memory/1520-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1592-54-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1592-44-0x0000000075080000-0x00000000751DD000-memory.dmp

Filesize
1.4MB

Download
memory/2656-16-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2656-58-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2656-69-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2656-14-0x0000000075080000-0x00000000751DD000-memory.dmp

Filesize
1.4MB

Download
memory/2656-13-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3100-41-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3100-37-0x0000000075080000-0x00000000751DD000-memory.dmp

Filesize
1.4MB

Download
memory/3100-36-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3100-60-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3668-52-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3668-29-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3668-25-0x0000000075080000-0x00000000751DD000-memory.dmp

Filesize
1.4MB

Download