bea441d7f4464dfa53414685054bf24149fce66f3ad34da256354245016de32d

General

Target
MasonClient.exe
Size 53KB
Sample260627-24fspses2n
SHA256 bea441d7f4464dfa53414685054bf24149fce66f3ad34da256354245016de32d
MD5 af66d94d288bb326683e1bc07b4095fc
SHA1 fb88c8fdf366e22a726f6b046e3c3cc28d51a730
SHA512 c2fa6c2f7fce9798414e5432404e4b500efc1ed8bd74bc982af7a6bf96dea10548ddf220674d8ae9f4a1cada7c1f7ff7b3783cef1ccc7a284b905033d291e0ae
SSDEEP 768:cWRf+TDjfEeMm8hlOqC4q1cG7xXUZtDbCdgMBXzop2liNHrhBOoSXx:cWYzfh38hl45xXw9bCdttopxrDOVx
TLSH
T11A33D589E3D94130C1FF7BB959B363114B35B5138412C61F68D849EE272EBC94AA1BE3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

execution persistence spyware stealer

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-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	MasonClient.exe

Executes dropped EXE 3 IoCs

pid	Process
2908	MasonClient.exe
5104	MasonClient.exe
1180	MasonClient.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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-1-5-21-540052884-2969440504-464782435-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MasonClient = "C:\\Users\\Admin\\AppData\\Roaming\\MasonClient.exe"	MasonClient.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4812	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4896	MasonClient.exe
Token: SeDebugPrivilege	2908	MasonClient.exe
Token: SeDebugPrivilege	5104	MasonClient.exe
Token: SeDebugPrivilege	1180	MasonClient.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 4896 wrote to memory of 4812	4896	MasonClient.exe	84

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\MasonClient.exe
"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4896
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "MasonClient" /tr "C:\Users\Admin\AppData\Roaming\MasonClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4812

C:\Users\Admin\AppData\Roaming\MasonClient.exe
C:\Users\Admin\AppData\Roaming\MasonClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2908

C:\Users\Admin\AppData\Roaming\MasonClient.exe
C:\Users\Admin\AppData\Roaming\MasonClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5104

C:\Users\Admin\AppData\Roaming\MasonClient.exe
C:\Users\Admin\AppData\Roaming\MasonClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1180

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

MasonClient.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\MasonClient.exe.log
Size 654B
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
TLSH
T1D9F0DD242221E1C489127F111C0D2A4452BF4797B760EE0C7554529FD8312275F203E7
MD5 SHA1 SHA512 TLSH

Submit Download

MasonClient.exe

Path C:\Users\Admin\AppData\Roaming\MasonClient.exe
Size 53KB
SHA256 bea441d7f4464dfa53414685054bf24149fce66f3ad34da256354245016de32d
MD5 af66d94d288bb326683e1bc07b4095fc
SHA1 fb88c8fdf366e22a726f6b046e3c3cc28d51a730
SHA512 c2fa6c2f7fce9798414e5432404e4b500efc1ed8bd74bc982af7a6bf96dea10548ddf220674d8ae9f4a1cada7c1f7ff7b3783cef1ccc7a284b905033d291e0ae
SSDEEP 768:cWRf+TDjfEeMm8hlOqC4q1cG7xXUZtDbCdgMBXzop2liNHrhBOoSXx:cWYzfh38hl45xXw9bCdttopxrDOVx
TLSH
T11A33D589E3D94130C1FF7BB959B363114B35B5138412C61F68D849EE272EBC94AA1BE3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4896-0-0x0000000000070000-0x0000000000084000-memory.dmp

Download

memory/4896-2-0x000000001AF20000-0x000000001AF30000-memory.dmp

Download

memory/4896-6-0x000000001AF20000-0x000000001AF30000-memory.dmp

Download

memory/4896-7-0x000000001BC00000-0x000000001BC0C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads