4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01/06/2024, 21:06

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe
Size

65KB
MD5

49e0fa8368cd83a2b8ec1b85ea560421
SHA1

a70f81439c4c04baccfe113e2741c69a89a1ebc9
SHA256

4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e
SHA512

dcef16e05809521ca90d4f586aa92467ee8e9d3247e43d9da2f390df3d0c704542beb50916aa80afffab9a8fb4fd838cc47f82ee76e09770716756ec59fac3f3
SSDEEP

1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/Oul:7WNqkOJWmo1HpM0MkTUmul

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"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\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\{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
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

Executes dropped EXE 4 IoCs

pid	Process
4876	explorer.exe
4636	spoolsv.exe
64	svchost.exe
2856	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\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
File opened for modification	\??\c:\windows\system\explorer.exe	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.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
2284	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe
2284	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe
4876	explorer.exe
4876	explorer.exe
4876	explorer.exe
4876	explorer.exe
4876	explorer.exe
4876	explorer.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
64	svchost.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
4876	explorer.exe
64	svchost.exe
64	svchost.exe
4876	explorer.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
64	svchost.exe
4876	explorer.exe
4876	explorer.exe
64	svchost.exe
64	svchost.exe
4876	explorer.exe
4876	explorer.exe
64	svchost.exe
64	svchost.exe
64	svchost.exe
4876	explorer.exe
4876	explorer.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe
4876	explorer.exe
64	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
4876	explorer.exe
64	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2284	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe
2284	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe
4876	explorer.exe
4876	explorer.exe
4636	spoolsv.exe
4636	spoolsv.exe
64	svchost.exe
64	svchost.exe
2856	spoolsv.exe
2856	spoolsv.exe
4876	explorer.exe
4876	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 4876	2284	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe	82
PID 2284 wrote to memory of 4876	2284	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe	82
PID 2284 wrote to memory of 4876	2284	4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe	82
PID 4876 wrote to memory of 4636	4876	explorer.exe	83
PID 4876 wrote to memory of 4636	4876	explorer.exe	83
PID 4876 wrote to memory of 4636	4876	explorer.exe	83
PID 4636 wrote to memory of 64	4636	spoolsv.exe	84
PID 4636 wrote to memory of 64	4636	spoolsv.exe	84
PID 4636 wrote to memory of 64	4636	spoolsv.exe	84
PID 64 wrote to memory of 2856	64	svchost.exe	85
PID 64 wrote to memory of 2856	64	svchost.exe	85
PID 64 wrote to memory of 2856	64	svchost.exe	85
PID 64 wrote to memory of 3456	64	svchost.exe	86
PID 64 wrote to memory of 3456	64	svchost.exe	86
PID 64 wrote to memory of 3456	64	svchost.exe	86
PID 64 wrote to memory of 3992	64	svchost.exe	101
PID 64 wrote to memory of 3992	64	svchost.exe	101
PID 64 wrote to memory of 3992	64	svchost.exe	101
PID 64 wrote to memory of 532	64	svchost.exe	112
PID 64 wrote to memory of 532	64	svchost.exe	112
PID 64 wrote to memory of 532	64	svchost.exe	112

C:\Users\Admin\AppData\Local\Temp\4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe
"C:\Users\Admin\AppData\Local\Temp\4b75099cf7902bc81ecb530d30f066c5c15f48c85e2cfe4573462bfb7d07744e.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2284
- \??\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:4876
- - \??\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:4636
  - - \??\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:64
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2856
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:08 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3456
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:09 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3992
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:10 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:532

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\mrsys.exe

Filesize
65KB

MD5
7fd188b35f4cd85fb8c28f07a400c1db

SHA1
8c997c71203b84e37b4a597c4a14fd44c6f2328b

SHA256
c664cdd9c6850759504eb314a75b2a4fc9d44a25c0c1e1d126f115a082c8b878

SHA512
2317ec4c99a6c4f34e4f9e646e7f83b74d8e7cc5bfd65aeb9a8a6c35042c834884ed3145d133632b157ba207528db1dd3eda53f2bc9a75039b1fb2b91504a941

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

Filesize
65KB

MD5
1c3e49817c2f1030fa92eb102e58aced

SHA1
3411a98032de9d4cbfc7bd08065f3de647f76843

SHA256
f6630e05e238f3afc94d037af73265c45e96ac60a48122105ef0637371bcbbd7

SHA512
1e4604e6caf604159e05f8e1c84b692d46ec4612a457292c60cb5f082c0046a04f3e2034018756ea1e1396afda0cb93f30d6c70876693f6ef5da15bc637a414c

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

Filesize
65KB

MD5
1f59467d7b14f643f0320020240b3d7c

SHA1
8883e49026195d2943b6d21246fbe3584c366f25

SHA256
e65307501819987e931794a44b9bb2f226559888716e1b5044a7f285972a6120

SHA512
aaec5c4674a40abcbe9f62e063ad201f13182b7c6e055f00fefd8c8bf9dfec9799eb5a6256324a44b5dc98e77eb1c0b69c98db565eeb1c94fac90ae372480acd

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

Filesize
65KB

MD5
9e50de61de149a7a1be34e3dad806f4f

SHA1
c0b80317397e54b7ab1f6723dd55171896db3ac0

SHA256
980381863820fb48daae6ef9cbd04db9dfe078e0f14d208bcdd69c0cc81b49f7

SHA512
a9f064ea2024deef31ce36e6e1a798429d6ee2000a851dcc7dd5f258b0411ae9072fa6ba9f997617fd2d836ce855b9d3df41492866029795f33e026d9d422dce

Download Submit
memory/64-60-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/64-37-0x00000000759A0000-0x0000000075AFD000-memory.dmp

Filesize
1.4MB

Download
memory/64-36-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2284-56-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2284-2-0x00000000759A0000-0x0000000075AFD000-memory.dmp

Filesize
1.4MB

Download
memory/2284-1-0x00000000001D0000-0x00000000001D4000-memory.dmp

Filesize
16KB

Download
memory/2284-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2284-5-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/2284-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2284-55-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2856-43-0x00000000759A0000-0x0000000075AFD000-memory.dmp

Filesize
1.4MB

Download
memory/2856-51-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4636-25-0x00000000759A0000-0x0000000075AFD000-memory.dmp

Filesize
1.4MB

Download
memory/4636-30-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4636-53-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4876-13-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4876-58-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4876-14-0x00000000759A0000-0x0000000075AFD000-memory.dmp

Filesize
1.4MB

Download
memory/4876-69-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4876-16-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download