8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820

Analysis

max time kernel
150s
max time network
124s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/11/2024, 01:06 UTC

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General

Target

8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
Size

206KB
MD5

6866f46c7116c1edc78a09acb11e0e77
SHA1

e2d6836eb5a222a1087d463094140808758e2718
SHA256

8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820
SHA512

353533dcafe8196ee4fc751f5d4bc28fa23ea6318b809ec6aee74bbd462c9f1434b3b14ab00e608d9eb8be9772701b1b8e1525819c41f670e1a303b76e140e0d
SSDEEP

3072:5vEfVUzSLhIVbV6i5LirrlZrHyrUHUckoMQ2RN6unv:5vEN2U+T6i5LirrllHy4HUcMQY6E

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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\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 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
1776	explorer.exe
2244	spoolsv.exe
2844	svchost.exe
2824	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
1776	explorer.exe
1776	explorer.exe
2244	spoolsv.exe
2244	spoolsv.exe
2844	svchost.exe
2844	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\explorer.exe	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.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

System Location Discovery: System Language Discovery 1 TTPs 8 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	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.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
2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
1776	explorer.exe
1776	explorer.exe
1776	explorer.exe
2844	svchost.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe
1776	explorer.exe
2844	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1776	explorer.exe
2844	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
1776	explorer.exe
1776	explorer.exe
2244	spoolsv.exe
2244	spoolsv.exe
2844	svchost.exe
2844	svchost.exe
2824	spoolsv.exe
2824	spoolsv.exe
1776	explorer.exe
1776	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 1776	2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe	30
PID 2516 wrote to memory of 1776	2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe	30
PID 2516 wrote to memory of 1776	2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe	30
PID 2516 wrote to memory of 1776	2516	8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe	30
PID 1776 wrote to memory of 2244	1776	explorer.exe	31
PID 1776 wrote to memory of 2244	1776	explorer.exe	31
PID 1776 wrote to memory of 2244	1776	explorer.exe	31
PID 1776 wrote to memory of 2244	1776	explorer.exe	31
PID 2244 wrote to memory of 2844	2244	spoolsv.exe	32
PID 2244 wrote to memory of 2844	2244	spoolsv.exe	32
PID 2244 wrote to memory of 2844	2244	spoolsv.exe	32
PID 2244 wrote to memory of 2844	2244	spoolsv.exe	32
PID 2844 wrote to memory of 2824	2844	svchost.exe	33
PID 2844 wrote to memory of 2824	2844	svchost.exe	33
PID 2844 wrote to memory of 2824	2844	svchost.exe	33
PID 2844 wrote to memory of 2824	2844	svchost.exe	33
PID 2844 wrote to memory of 2784	2844	svchost.exe	34
PID 2844 wrote to memory of 2784	2844	svchost.exe	34
PID 2844 wrote to memory of 2784	2844	svchost.exe	34
PID 2844 wrote to memory of 2784	2844	svchost.exe	34
PID 2844 wrote to memory of 2944	2844	svchost.exe	37
PID 2844 wrote to memory of 2944	2844	svchost.exe	37
PID 2844 wrote to memory of 2944	2844	svchost.exe	37
PID 2844 wrote to memory of 2944	2844	svchost.exe	37
PID 2844 wrote to memory of 2016	2844	svchost.exe	39
PID 2844 wrote to memory of 2016	2844	svchost.exe	39
PID 2844 wrote to memory of 2016	2844	svchost.exe	39
PID 2844 wrote to memory of 2016	2844	svchost.exe	39

C:\Users\Admin\AppData\Local\Temp\8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe
"C:\Users\Admin\AppData\Local\Temp\8234f60cfbfae39174415f9d4abbfc21453f9f31e5548f13636ea9faa0b67820.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2516
- \??\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
  - Loads dropped DLL
  - 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:1776
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2244
  - - \??\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
      Loads dropped DLL
      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:2844
    - - \??\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:2824
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:08 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2784
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:09 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2944
    - - C:\Windows\SysWOW64\at.exe
        
        at 01:10 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2016

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

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Downloads

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

Filesize
206KB

MD5
3ce52daed0cdc9c28a09ccdc6c0cdad5

SHA1
2f825b28224b8cc7e1bc64e9abfacdb818500343

SHA256
49dc6262e221feea8ee88c8bbade1fed6d415687a8828bcceaeb6391e04b7b08

SHA512
4936031f118f8adfe8353b43f2fd997b346ce92a1a8d1ec82a06865e99264fa0cf5d0c2197365b12ae7cbb9ac4042e0b345e1b48bac2c6e7a643a85ab326e3b3

Download Submit
\Windows\system\explorer.exe

Filesize
206KB

MD5
5131545365e8c457f6b60952d2dd1394

SHA1
387823e7b23a14c025c81a27123e298558cafe71

SHA256
6e16651a84d88336874e3ad50f5d0f9b8e9468947a98dad9608bcca30974ddc5

SHA512
3c61250e122847f8f333d05c0e39d758fb4d9b59907b40fc9c8c94d67bc5c897396640b7f1d56307bd892fa9d39ffdf54fb83252c0a4e9fecac27e1d92fb3169

Download Submit
\Windows\system\spoolsv.exe

Filesize
206KB

MD5
5be85462b946d6d7f262b557108c9d9d

SHA1
b9558982326603f88ff9dd5c25ae75b5b9b911c0

SHA256
52ed3a5070b5dd6a8580e84f4c7fc4004a7eb4491f577bf2f6e8bdcc76a4d653

SHA512
a5dcd02240a44ac211fc84db1e9a092f0534e78a160265733c43ab6f7e1cc53194e7624902b8153775294a97b05bc8b76ee7fb87820a354dc9417925c6fdbfd0

Download Submit
\Windows\system\svchost.exe

Filesize
206KB

MD5
e436765adfd72d939dcf8a99a1d96f7f

SHA1
f21425a6a590580b21de35007cbaaa76ee0d0142

SHA256
000216aee0cc455e41a43dbf60b88a7b3cb24b73c5979699a05b8706f32b376a

SHA512
e1d196644ed04490f7d8083c0f8610c179eff0af75840f08bee03756046bf0dfffc4d41f1d65e198aa874de51705a1f1263b6a64b5f60f9f471544e33a2eb87f

Download Submit
memory/1776-59-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2244-56-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2244-30-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2516-0-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2516-57-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2516-13-0x00000000030F0000-0x0000000003130000-memory.dmp

Filesize
256KB

Download
memory/2516-14-0x00000000030F0000-0x0000000003130000-memory.dmp

Filesize
256KB

Download
memory/2824-53-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2844-42-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/2844-60-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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