ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9

Analysis

max time kernel
150s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19/09/2024, 03:15

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General

Target

ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
Size

122KB
MD5

8cff9c7979f43c7c1f97664ea1afd836
SHA1

5a366d4fde27504ae71d1a64527ffc016448b89c
SHA256

ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9
SHA512

0e905236cabbb3830ceb909b44a3fdaf59a39e37cbb088b7dc92c7b2d59363660165c7d579cfbfdfa8b7c8d5d187569e69dc147e3f3d28f50387f96ccfff4948
SSDEEP

1536:niyzlrXCu2lsuAoeQZZ86ukpj0nGGF9v+4Dvo:iyZCu2lhA1QZZ4kp4F9Xzo

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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\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
2408	explorer.exe
2920	spoolsv.exe
2808	svchost.exe
2748	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
2408	explorer.exe
2408	explorer.exe
2920	spoolsv.exe
2920	spoolsv.exe
2808	svchost.exe
2808	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	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.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\tjud.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 5 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
2408	explorer.exe
2408	explorer.exe
2408	explorer.exe
2808	svchost.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe
2408	explorer.exe
2808	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2408	explorer.exe
2808	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
2408	explorer.exe
2408	explorer.exe
2920	spoolsv.exe
2920	spoolsv.exe
2808	svchost.exe
2808	svchost.exe
2748	spoolsv.exe
2748	spoolsv.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1076 wrote to memory of 2408	1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe	30
PID 1076 wrote to memory of 2408	1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe	30
PID 1076 wrote to memory of 2408	1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe	30
PID 1076 wrote to memory of 2408	1076	ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe	30
PID 2408 wrote to memory of 2920	2408	explorer.exe	31
PID 2408 wrote to memory of 2920	2408	explorer.exe	31
PID 2408 wrote to memory of 2920	2408	explorer.exe	31
PID 2408 wrote to memory of 2920	2408	explorer.exe	31
PID 2920 wrote to memory of 2808	2920	spoolsv.exe	32
PID 2920 wrote to memory of 2808	2920	spoolsv.exe	32
PID 2920 wrote to memory of 2808	2920	spoolsv.exe	32
PID 2920 wrote to memory of 2808	2920	spoolsv.exe	32
PID 2808 wrote to memory of 2748	2808	svchost.exe	33
PID 2808 wrote to memory of 2748	2808	svchost.exe	33
PID 2808 wrote to memory of 2748	2808	svchost.exe	33
PID 2808 wrote to memory of 2748	2808	svchost.exe	33

C:\Users\Admin\AppData\Local\Temp\ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.exe
"C:\Users\Admin\AppData\Local\Temp\ef7dccb6e33fb9d360bd9be4b0acd28d54d2988fd16a0ce42ab2b4aa844bdbc9.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:1076
- \??\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:2408
- - \??\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:2920
  - - \??\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:2808
    - - \??\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:2748

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
122KB

MD5
ad94929a61ad3a06dd9bf983a6daa90c

SHA1
27febbda4c44c45c157afd2ccfc16baf90990866

SHA256
6851b2cdcfa1f95ecf09d8ea8a1d659798d81b4a6fdce3f3255d85ff0e374d51

SHA512
d4510599be74bdcb305944bb218f61c7b3a734e2b6c522da315002919dc2c89165068ef26227bfe73cafbd4b0a2fa4f3bdd5917a80d19fc9a08a924e974d2af9

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\Windows\system\explorer.exe

Filesize
122KB

MD5
c4891164339f11ce66e13f2a787715e1

SHA1
10b337f3d089672d4aab8d4530a5d15bee9366a0

SHA256
17ab2c049ae7cbd9f98ad7fb6df1dc7c589d51a2572213dcc007ba9bce2157d3

SHA512
9545f2f1a2f233f99e7120ded2e961d5291451564ff31b0a10b386a2c222ac0fa5aea5f33f1e283909d52281a2cf00a10e4ea3092122f25ca92babe2e6ba4757

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\Windows\system\spoolsv.exe

Filesize
122KB

MD5
511a561d264e3405168e21f8bb412d26

SHA1
0bb7666b3db45db5f441ff14ad8b2cd887230ec4

SHA256
cae78791cebc439d654ba3cdbb6e5896229ce215488c9e6ce809b701cf610196

SHA512
2716eca14fe9e27f3d9a8920c16773f91cfb451fefe87d952a1e8e6d1238b9a95ed9005b30f65997484607436ac279f5100d4dda35e180dfdf713f744613af06

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\Windows\system\svchost.exe

Filesize
122KB

MD5
7d7c517c929153582fdb72f93e3275e5

SHA1
8ad6f6214bef7ed82c29f46e8c8e2c98a453f8d0

SHA256
b884a4649a51175adc19a7c356c1f6babe4b9f4e05fa17bb65c1c3ee4c8ed80f

SHA512
8ad902a6c3cd9a4fe9483eba2fd2d6ec3e6916d67ed0786e05d5bc1e03118cc1912aed277ef3ad3696e476b7fe8ca32dc8c338b3a324ed25f5ec495ce9a90b8c

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