3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391

Analysis

max time kernel
150s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 20:40

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General

Target

3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe
Size

199KB
MD5

9fb28fbd3e062a1f91cf45004d2f796b
SHA1

bbe609bacd8179b61b22da7a9dcd172b71505d95
SHA256

3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391
SHA512

16ecae84da06a6b33ec52abf60373a163fbb354352124211558ae2a0013b7807f70cddedd78c888f624dc0d6180685926df2dbdfa27bd88a1c0ab52c67c02c90
SSDEEP

3072:7vEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6u4Pmu1:7vEN2U+T6i5LirrllHy4HUcMQY6j

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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\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}	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
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
4004	explorer.exe
3136	spoolsv.exe
1260	svchost.exe
2472	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	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	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.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
3516	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe
3516	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe
4004	explorer.exe
4004	explorer.exe
4004	explorer.exe
4004	explorer.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe
4004	explorer.exe
4004	explorer.exe
1260	svchost.exe
1260	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
4004	explorer.exe
1260	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3516	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe
3516	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe
4004	explorer.exe
4004	explorer.exe
3136	spoolsv.exe
3136	spoolsv.exe
1260	svchost.exe
1260	svchost.exe
2472	spoolsv.exe
2472	spoolsv.exe
4004	explorer.exe
4004	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3516 wrote to memory of 4004	3516	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe	84
PID 3516 wrote to memory of 4004	3516	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe	84
PID 3516 wrote to memory of 4004	3516	3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe	84
PID 4004 wrote to memory of 3136	4004	explorer.exe	85
PID 4004 wrote to memory of 3136	4004	explorer.exe	85
PID 4004 wrote to memory of 3136	4004	explorer.exe	85
PID 3136 wrote to memory of 1260	3136	spoolsv.exe	86
PID 3136 wrote to memory of 1260	3136	spoolsv.exe	86
PID 3136 wrote to memory of 1260	3136	spoolsv.exe	86
PID 1260 wrote to memory of 2472	1260	svchost.exe	88
PID 1260 wrote to memory of 2472	1260	svchost.exe	88
PID 1260 wrote to memory of 2472	1260	svchost.exe	88
PID 1260 wrote to memory of 2220	1260	svchost.exe	89
PID 1260 wrote to memory of 2220	1260	svchost.exe	89
PID 1260 wrote to memory of 2220	1260	svchost.exe	89
PID 1260 wrote to memory of 3188	1260	svchost.exe	101
PID 1260 wrote to memory of 3188	1260	svchost.exe	101
PID 1260 wrote to memory of 3188	1260	svchost.exe	101
PID 1260 wrote to memory of 4484	1260	svchost.exe	103
PID 1260 wrote to memory of 4484	1260	svchost.exe	103
PID 1260 wrote to memory of 4484	1260	svchost.exe	103

C:\Users\Admin\AppData\Local\Temp\3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe
"C:\Users\Admin\AppData\Local\Temp\3511f46e5a8756eb55109c119413b5a403a6a4b48a034517263932006bcd5391.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3516
- \??\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:4004
- - \??\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:3136
  - - \??\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:1260
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2472
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:42 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2220
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:43 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3188
    - - C:\Windows\SysWOW64\at.exe
        
        at 20:44 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:4484

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
216KB

MD5
f8e1ddae7c767aed47d46e235b2c0101

SHA1
c04a37d52b11f21faf350376b0623f80b19813b2

SHA256
acfceb68d41cb775c7570a949a839190c957b1c943ec8d5ab5fb0a6043c74673

SHA512
e7f0f974f7f8cba7cce620d3bfa357c9b2dd3d55b2f1fbd22c3632b01c045d0c4ed8eba23594c6ef1bc8f33acd84da6182216625e196a19b0738d1bda20be92d

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

Filesize
216KB

MD5
6f04e0c7e48cec5dfe5b3c1634c4d5de

SHA1
0c5e67879ddff88275ba496ce0fc440795deff80

SHA256
5587b6e1bb5242f00a652980defed2dad4d98adc974ef3ed5ce9553f88eb49ee

SHA512
700f96fec7e053c046396f1d671ce4e6297b22de6317ec9fa537452048dc6d16c2c97e5d5df30d1450ea1bb86e0ad2dde285bec7b32c26c445a6eca01687905e

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

Filesize
216KB

MD5
89d156f8e476a0c63add57bfa8a65a8a

SHA1
e716fb095815bfd96a7a6d002a8dafad1213e81c

SHA256
1a33e6fd3ddf5d5f54b7eafe7eead5a15f3e1a4e1f19a24137b3abcc82f5e485

SHA512
e171978d260317dd8e006d3d47763d93f5b14eeb6313841950021e7cda05a89dd8ceb94d18587893a8447b38e214fb8d4d97037b0323bfa790b2e7564c8d9a30

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

Filesize
216KB

MD5
0b1b738bcbd01958022937619c3598be

SHA1
37e70914dcb8ee74c0cc1dc93ee86280b649fadc

SHA256
672feaf8a00dfbf2309f4bd8cb14aabae5ee4f437e7d00c02ddb27397b0148b5

SHA512
948dc15a6303d24be96adc5c2e8d5504e359fc615e7b0c3c150d72894d33dcf24a3a503741b425839f9b6a55afd0207804524876f13899256d51c2ffa53e7973

Download Submit
memory/2472-29-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2472-35-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3136-36-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3516-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3516-37-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download