5b138e0c61dbfab900f60cc9baad08fde46271ce139cae25e8d3bac7d76310fc

Reason

Machine shutdown

General

Target

电脑屏幕保护截图.exe
Size

155KB
MD5

8f3eb752ed2948f6ac4ffe9c376c2fa4
SHA1

c327fe1ec70e0a3f5d2123e5068b73c279f04aad
SHA256

5b138e0c61dbfab900f60cc9baad08fde46271ce139cae25e8d3bac7d76310fc
SHA512

f69b0ec70125d47f8043876232c22548ebfa325416b2d71207c55ac1d22bdf0525794342a5d428394114f75b6a04edf3e3cdcd6fc6e9f70594c89909eb9033c8
SSDEEP

3072:juixvadwbOz/2usL+7O9zq+L7aGHJvbqBzN89moRFi4RaIOFjnlg7PwYd:S1wbOyJC7azqq71pve9N89J3XTK4PwYd

Score

8^/10

persistence upx

Malware Config

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	2644	rundll32.exe
6	2644	rundll32.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2644-4-0x0000000010000000-0x0000000010193000-memory.dmp	upx
behavioral1/memory/2644-7-0x0000000010000000-0x0000000010193000-memory.dmp	upx
behavioral1/memory/2644-8-0x0000000010000000-0x0000000010193000-memory.dmp	upx
behavioral1/memory/2644-9-0x0000000010000000-0x0000000010193000-memory.dmp	upx
behavioral1/memory/2644-11-0x0000000010000000-0x0000000010193000-memory.dmp	upx
behavioral1/memory/2644-13-0x0000000010000000-0x0000000010193000-memory.dmp	upx

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-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\Users\\Admin\\AppData\\Local\\Temp\\电脑屏幕保护截图.exe"	电脑屏幕保护截图.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\J:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\Q:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\I:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\X:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\E:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe
File opened (read-only)	\??\V:	rundll32.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3000 set thread context of 2644	3000	电脑屏幕保护截图.exe	28

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	rundll32.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe
2644	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2644	rundll32.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28
PID 3000 wrote to memory of 2644	3000	电脑屏幕保护截图.exe	28

C:\Users\Admin\AppData\Local\Temp\电脑屏幕保护截图.exe
"C:\Users\Admin\AppData\Local\Temp\电脑屏幕保护截图.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Windows\SysWOW64\rundll32.exe
  rundll32
  2⤵
  - Blocklisted process makes network request
  - Enumerates connected drives
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2644

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:2388

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:1624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1624-18-0x0000000002AB0000-0x0000000002AB1000-memory.dmp

Filesize
4KB

Download
memory/2388-17-0x0000000002E10000-0x0000000002E11000-memory.dmp

Filesize
4KB

Download
memory/2644-1-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2644-2-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2644-3-0x0000000000170000-0x00000000001BD000-memory.dmp

Filesize
308KB

Download
memory/2644-4-0x0000000010000000-0x0000000010193000-memory.dmp

Filesize
1.6MB

Download
memory/2644-7-0x0000000010000000-0x0000000010193000-memory.dmp

Filesize
1.6MB

Download
memory/2644-8-0x0000000010000000-0x0000000010193000-memory.dmp

Filesize
1.6MB

Download
memory/2644-9-0x0000000010000000-0x0000000010193000-memory.dmp

Filesize
1.6MB

Download
memory/2644-11-0x0000000010000000-0x0000000010193000-memory.dmp

Filesize
1.6MB

Download
memory/2644-13-0x0000000010000000-0x0000000010193000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads