58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1b

Analysis

max time kernel
120s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20/09/2024, 06:40

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General

Target

58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe
Size

503KB
MD5

ebe4fd3691956df84f935c1b2f895e30
SHA1

58c7cbf3ff51c18c7f9adb334e16f50bf1d0033f
SHA256

58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1b
SHA512

1031d7e9c6e8c30b08f27b172f195f087e139245ebf7b6d302d8484408b015de8af0bab3fd13958f0f425e75243a5996352cf30f6d4d8ddc128ad5cf1f3ff6da
SSDEEP

12288:3ENN+T5xYrllrU7QY6CRYiioQzhGTRKhWcFc9f:N5xolYQY6yYjJzhgKhWcFc9f

Score

10^/10

discovery 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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

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
2640	explorer.exe
3480	spoolsv.exe
932	svchost.exe
744	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	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.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

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3692	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe
3692	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe
2640	explorer.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
2640	explorer.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe
2640	explorer.exe
2640	explorer.exe
932	svchost.exe
932	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2640	explorer.exe
932	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3692	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe
3692	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe
2640	explorer.exe
2640	explorer.exe
3480	spoolsv.exe
3480	spoolsv.exe
932	svchost.exe
932	svchost.exe
744	spoolsv.exe
744	spoolsv.exe
2640	explorer.exe
2640	explorer.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3692 wrote to memory of 2640	3692	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe	82
PID 3692 wrote to memory of 2640	3692	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe	82
PID 3692 wrote to memory of 2640	3692	58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe	82
PID 2640 wrote to memory of 3480	2640	explorer.exe	83
PID 2640 wrote to memory of 3480	2640	explorer.exe	83
PID 2640 wrote to memory of 3480	2640	explorer.exe	83
PID 3480 wrote to memory of 932	3480	spoolsv.exe	84
PID 3480 wrote to memory of 932	3480	spoolsv.exe	84
PID 3480 wrote to memory of 932	3480	spoolsv.exe	84
PID 932 wrote to memory of 744	932	svchost.exe	85
PID 932 wrote to memory of 744	932	svchost.exe	85
PID 932 wrote to memory of 744	932	svchost.exe	85
PID 932 wrote to memory of 408	932	svchost.exe	86
PID 932 wrote to memory of 408	932	svchost.exe	86
PID 932 wrote to memory of 408	932	svchost.exe	86
PID 932 wrote to memory of 996	932	svchost.exe	97
PID 932 wrote to memory of 996	932	svchost.exe	97
PID 932 wrote to memory of 996	932	svchost.exe	97

C:\Users\Admin\AppData\Local\Temp\58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe
"C:\Users\Admin\AppData\Local\Temp\58b02d0eb1e58564c274e82b3aedcad163dbfbbdd25c8ddd8155d15053773e1bN.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3692
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2640
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3480
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:932
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:744
    - - C:\Windows\SysWOW64\at.exe
        
        at 06:42 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:408
    - - C:\Windows\SysWOW64\at.exe
        
        at 06:43 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
503KB

MD5
0604831527710a3fe9c435b2af8b32e5

SHA1
7859229e5f8ebb59d1e00bfeef9f0fc1a4889149

SHA256
2ad2e5e5e20701aefe1e8e85b01f23241722331b377f12ef06e928958b647d7c

SHA512
1fbe600d9dd671734608c212b021e03bb8a83004712ac6d1caf246d4582b6061adfe82dc9b76878f5cb382ca4634177ce7db45ceed8de69d0a83080d68a132fa

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

Filesize
503KB

MD5
5449bca353c97fce57ee01126f89fb6d

SHA1
847ef159363c11a5cc709fd7492d5efb2767c98c

SHA256
ba1238ca10a4c0c2aafbabc279f93ee7ec3b2e9d89fda90531934486ff3a9cca

SHA512
8d8a089ab7e05162bd2af221de50189dd6542823777291a2af44ebf2427de902b62bcf7a6a41e0c650f2bc406d5190cddab94dd7910714a0551db5a0af9e20d5

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

Filesize
503KB

MD5
d0f2e18c4e0db6ca97fe331642cd0a34

SHA1
8987d82f8558f20a13e3e774d0ca8ab02d3d8c4e

SHA256
9c3abd1749e847be850172872ad8986f7a6de97079de00ff7fa32e2c573bba95

SHA512
88ed624bae4e92481a4842bfe7f32500bfe432f81eb7a441863d0f8b893307289d417322a1b10ccd58f4658c606e51c85f7eabeefb51524526b63c184845982f

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

Filesize
503KB

MD5
fe57c434548f11533560bb863f726810

SHA1
7b64874bbdf23bd6fc603111b2240ac2e3ffe83c

SHA256
a74c474b618d0f0a9cde1b795056d2d9361fb85ca4806c397b429a40684e633f

SHA512
125ef4aaeb34ac350876eb2f538b474d68b8b91c8d48009f7f4f0639fc6766d84e0f743f67756cf71e3f43219024f6239946920f978bd7fcf19daf93d494bdba

Download Submit
memory/744-32-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/932-39-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/2640-38-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/3480-35-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/3692-0-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download
memory/3692-37-0x0000000000400000-0x0000000000471000-memory.dmp

Filesize
452KB

Download