b2b1f374822e760b574cff680d989d0f229bdaf9029acacb2449162b92bbc16b

Analysis

max time kernel
145s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
09/01/2024, 07:05

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General

Target

PortChecker.exe
Size

128KB
MD5

f9e1db23e7a2293a089963351994208d
SHA1

dd60e6052959bf6787e035ce4122f4b9f461ce14
SHA256

27a739ca787fa265624d3ab8a5311a0e0f7d39c79c3c5365aff25159b0bb8dd4
SHA512

7058767d13fc57534f437b6c077d70ced53a0a8f53a03259dc3cc513ab07809c04303db649ba368b67bddee854f78c8570aa46d5f468720caa26696a8d70bc8e
SSDEEP

1536:KENNZHJxxl+LxcZDWAy3OgHEtIyAq3Hoa35ecoNVkSQLVz4ZkNfG:pNHHgKZ4Et5lTRoNO5VEZkNe

Score

10^/10

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 = "Explorer.exe \"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	PortChecker.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	svchost.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2848	netsh.exe

Deletes itself 1 IoCs

pid	Process
3432	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
3432	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\USER\S-1-5-21-2398549320-3657759451-817663969-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	PortChecker.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSWUpdate = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	PortChecker.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3612	PortChecker.exe
3432	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3612 wrote to memory of 2848	3612	PortChecker.exe	99
PID 3612 wrote to memory of 2848	3612	PortChecker.exe	99
PID 3612 wrote to memory of 2848	3612	PortChecker.exe	99
PID 3612 wrote to memory of 3432	3612	PortChecker.exe	97
PID 3612 wrote to memory of 3432	3612	PortChecker.exe	97
PID 3612 wrote to memory of 3432	3612	PortChecker.exe	97

C:\Users\Admin\AppData\Local\Temp\PortChecker.exe
"C:\Users\Admin\AppData\Local\Temp\PortChecker.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Users\Admin\AppData\Roaming\svchost.exe
  /d C:\Users\Admin\AppData\Local\Temp\PortChecker.exe
  2⤵
  - Modifies WinLogon for persistence
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetWindowsHookEx
  PID:3432
- C:\Windows\SysWOW64\netsh.exe
  netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" CityScape Enable
  2⤵
  - Modifies Windows Firewall
  PID:2848

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

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\hvXywVAo

Filesize
39KB

MD5
867c056891cea882ffca9b61e6dbceb8

SHA1
21d836ffcbe62f9bd3913881f72d00ea90c3b12a

SHA256
b647a3a0479757532a22a025092ec24438d6ada044ba6791ba557744dcab7319

SHA512
3446a78c6579190368035ce9ac023b3f4a1bcb6c32696d454a45bed63370478a5e68b324d63a5eedc6c90f0b1027bdafd95c36ff78852262581b5fa233eebd92

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

Filesize
128KB

MD5
8f2b1e19d4e3db59dffb57b935297d42

SHA1
bc25c51f443fea063a9be303985321ce488acc1f

SHA256
ecb7cddd7493e8f0267b95732acb3a3c967458ecd3d53198f546ffc05ea40c6b

SHA512
994c9dc5f920fdf58129b16c79c0f17da4d10d883661425bd7e504978140533b7ae600e35d8933039a69bb8bb9738c173df65f467bde567df0fcee8fbe66ac5d

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads