b6138bd31f0930d6f489ac8ef0dad8333b30bcebc51c0940b19ab4cb3ffbab73

Analysis

max time kernel
51s
max time network
56s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
12/06/2024, 04:33

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General

Target
SystemClockHookHost_x64.exe
Size 125KB
Sample240612-e6wkls1cnp
SHA256 94ea02eed6c7cf4e349773e00be51d791c35399b341b1174b12815c50dcb5564
MD5 22cb902359ab5b2e14d36c3e47320d44
SHA1 4b62dbc7be7f33c10bf9bdcc4ca0c373dd5b4214
SHA512 e6948e9f993724a508930309ca595f8c4066bcab3f4eef1ccc67da87d536bd2f5ebac13161d413efa47c0e60a3ed4476617010a35fdf4d3fc916fcd210c4adfd
SSDEEP 3072:z9oM7hY27gAzivYQnsQtG7vQZKCUtWVY+9NnnbxwQ:ZFYrOivHnDGy0Y7NaQ
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	SystemClockHookHost_x64.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\优效日历 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\YXCalendar.exe\" --autorun"	YXCalendar.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1732	SystemClockHookHost_x64.exe
1732	SystemClockHookHost_x64.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe

Suspicious use of FindShellTrayWindow 18 IoCs

pid	Process
1732	SystemClockHookHost_x64.exe
1732	SystemClockHookHost_x64.exe
1732	SystemClockHookHost_x64.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe
4444	YXCalendar.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4444	YXCalendar.exe
4444	YXCalendar.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1732	SystemClockHookHost_x64.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 4444	1732	SystemClockHookHost_x64.exe	81
PID 1732 wrote to memory of 4444	1732	SystemClockHookHost_x64.exe	81
PID 1732 wrote to memory of 4444	1732	SystemClockHookHost_x64.exe	81

C:\Users\Admin\AppData\Local\Temp\SystemClockHookHost_x64.exe
"C:\Users\Admin\AppData\Local\Temp\SystemClockHookHost_x64.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Users\Admin\AppData\Local\Temp\YXCalendar.exe
  "C:\Users\Admin\AppData\Local\Temp\YXCalendar.exe" --autorun
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:4444

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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