674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365f

Analysis

max time kernel
120s
max time network
17s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20/09/2024, 14:30

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General

Target

674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe
Size

200KB
MD5

2cc46babc5e30f5c98ae61a21cfdff80
SHA1

73ae2a8735095357c7f78eeda5ee41b8651b77f7
SHA256

674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365f
SHA512

81f47aedc9b22a9b0b2849494ec8030a9169307850c0539a1f74a30c62dba56f232437eafebd8d4b2874d3fecd350f95f140d33d2ee29b735bf58dc88499c36c
SSDEEP

3072:BvEfVUzSLhIVbV6i5LirrlxrHyrUHUckoMQ2AN6B9O:BvEN2U+T6i5Lirrl9Hy4HUcMQn6K

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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\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}	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
2184	explorer.exe
1884	spoolsv.exe
3016	svchost.exe
1372	spoolsv.exe

Loads dropped DLL 8 IoCs

pid	Process
2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe
2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe
2184	explorer.exe
2184	explorer.exe
1884	spoolsv.exe
1884	spoolsv.exe
3016	svchost.exe
3016	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\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe
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

Drops file in Windows directory 6 IoCs

description	ioc	Process
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	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.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

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.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	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.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
2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe
2184	explorer.exe
2184	explorer.exe
2184	explorer.exe
3016	svchost.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe
2184	explorer.exe
3016	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2184	explorer.exe
3016	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe
2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe
2184	explorer.exe
2184	explorer.exe
1884	spoolsv.exe
1884	spoolsv.exe
3016	svchost.exe
3016	svchost.exe
1372	spoolsv.exe
1372	spoolsv.exe
2184	explorer.exe
2184	explorer.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 2184	2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe	31
PID 2128 wrote to memory of 2184	2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe	31
PID 2128 wrote to memory of 2184	2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe	31
PID 2128 wrote to memory of 2184	2128	674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe	31
PID 2184 wrote to memory of 1884	2184	explorer.exe	32
PID 2184 wrote to memory of 1884	2184	explorer.exe	32
PID 2184 wrote to memory of 1884	2184	explorer.exe	32
PID 2184 wrote to memory of 1884	2184	explorer.exe	32
PID 1884 wrote to memory of 3016	1884	spoolsv.exe	33
PID 1884 wrote to memory of 3016	1884	spoolsv.exe	33
PID 1884 wrote to memory of 3016	1884	spoolsv.exe	33
PID 1884 wrote to memory of 3016	1884	spoolsv.exe	33
PID 3016 wrote to memory of 1372	3016	svchost.exe	34
PID 3016 wrote to memory of 1372	3016	svchost.exe	34
PID 3016 wrote to memory of 1372	3016	svchost.exe	34
PID 3016 wrote to memory of 1372	3016	svchost.exe	34
PID 3016 wrote to memory of 1212	3016	svchost.exe	35
PID 3016 wrote to memory of 1212	3016	svchost.exe	35
PID 3016 wrote to memory of 1212	3016	svchost.exe	35
PID 3016 wrote to memory of 1212	3016	svchost.exe	35
PID 3016 wrote to memory of 2852	3016	svchost.exe	37
PID 3016 wrote to memory of 2852	3016	svchost.exe	37
PID 3016 wrote to memory of 2852	3016	svchost.exe	37
PID 3016 wrote to memory of 2852	3016	svchost.exe	37

C:\Users\Admin\AppData\Local\Temp\674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.exe
"C:\Users\Admin\AppData\Local\Temp\674d1a8fc480f30a7b256da3fd8512844a12029aca9d83eafe6a780b1f9c365fN.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:2128
- \??\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:2184
- - \??\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:1884
  - - \??\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:3016
    - - \??\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:1372
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:32 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1212
    - - C:\Windows\SysWOW64\at.exe
        
        at 14:33 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2852

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
215KB

MD5
70d740b70b94b96361b6c2e04ddb0d14

SHA1
476f2cfecbdfdf747fa9899f6922b356ed2dbb7e

SHA256
402d3ad27951bbbf19296f3f6dbdafeb0de2e601506291d473f5cfa9b9851b2e

SHA512
4776040d2010411361e079624406af701e3746f3fe2af8823c49d0792ad108ef26d8b85ade31e6ed34fb1bb505e4fdb3d58561d366b8999c447b490f0307c7b7

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

Filesize
215KB

MD5
c42a3ca5c7113a7b5017cd961059fb0c

SHA1
30069d500e72625e4af7532cc2e49862ed6a0e4b

SHA256
e35048fb1af621b8434d9d7b055d7c18b7c2c3a4ed9291cf2e54f1283f356e3e

SHA512
bf51340f830c79802cb3e5d83011766d91d1866f87a34d6f828e1d5272b361f04123091c4136108ba359a921da3a3e8859bd4a2b8b26fc8a62516cae6a22950c

Download Submit
\Windows\system\explorer.exe

Filesize
215KB

MD5
572ea1af029c079ec15699780c01dcda

SHA1
b13d7718136e913e7073a0e2330d6bac32929019

SHA256
b7a446a12495e9f5a11e57083ce3e27cfe91c8faf0349444f5ce0e97863f0d0a

SHA512
6d260f66cca53350f194c927357a1b6e072f53fcc170bfba25aa7872527d21cb80920fc5effcf5bf47939e18a7fa851f56d53c5afcdc39ba348dc5b7a5d6f8b7

Download Submit
\Windows\system\svchost.exe

Filesize
215KB

MD5
9a84880ec5bbcab88a58f621d9aef8e0

SHA1
686583d23084961022a027e93e673bd863e7ca94

SHA256
28a2f6eec51fbe4bcf577d9c1331238c341a1b0d1d40200d086bf9930b6286e6

SHA512
fdd56763ca860d7e20de3beaa3cd9009ce7cc8b4eed87488d7f144f7a5cb00afe30a87a03c647290c936dafdbb20c432e23914ccd6248ea29f9439128a23407b

Download Submit
memory/1372-59-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1884-62-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2128-13-0x0000000002410000-0x0000000002441000-memory.dmp

Filesize
196KB

Download
memory/2128-51-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2128-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2128-63-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2128-14-0x0000000002410000-0x0000000002441000-memory.dmp

Filesize
196KB

Download
memory/2128-1-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2184-29-0x0000000002C50000-0x0000000002C81000-memory.dmp

Filesize
196KB

Download
memory/2184-65-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/2184-66-0x0000000002C50000-0x0000000002C81000-memory.dmp

Filesize
196KB

Download
memory/3016-54-0x0000000001D70000-0x0000000001DA1000-memory.dmp

Filesize
196KB

Download
memory/3016-67-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download