52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec

Analysis

max time kernel
153s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/11/2022, 04:14

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General

Target

52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec.exe
Size

307KB
MD5

0eaf291e0565a86af393bc576ebf0140
SHA1

78ca77d73e696c08c75d0a3ca3d43833f95fbf25
SHA256

52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec
SHA512

1adea0d508fe2c2c2bc793907241467d80644d58cdda0da6269e32148f5f94fff19834a03f59f79ac8f21565acd0e861b4c5a4fe20526a4a584980381fe2ab61
SSDEEP

3072:0ulG96P/KdN8HdvkXfIIIIIIIIIIIIIIIIIIIIIIIIIIIIxJIIIIIIIIIIIIIIIS:02Hd8XzKedQBRZFeE7BUBBb9l

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2156	mas.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
2816	netsh.exe

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4e60aa717f2e5a2c089f81bb10b9ec25.exe	mas.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4e60aa717f2e5a2c089f81bb10b9ec25.exe	mas.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\4e60aa717f2e5a2c089f81bb10b9ec25 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\mas.exe\" .."	mas.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\4e60aa717f2e5a2c089f81bb10b9ec25 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\mas.exe\" .."	mas.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe
2156	mas.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2156	mas.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4908 wrote to memory of 2156	4908	52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec.exe	80
PID 4908 wrote to memory of 2156	4908	52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec.exe	80
PID 4908 wrote to memory of 2156	4908	52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec.exe	80
PID 2156 wrote to memory of 2816	2156	mas.exe	81
PID 2156 wrote to memory of 2816	2156	mas.exe	81
PID 2156 wrote to memory of 2816	2156	mas.exe	81

C:\Users\Admin\AppData\Local\Temp\52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec.exe
"C:\Users\Admin\AppData\Local\Temp\52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4908
- C:\Users\Admin\AppData\Local\Temp\mas.exe
  "C:\Users\Admin\AppData\Local\Temp\mas.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2156
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\mas.exe" "mas.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:2816

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\mas.exe

Filesize
307KB

MD5
0eaf291e0565a86af393bc576ebf0140

SHA1
78ca77d73e696c08c75d0a3ca3d43833f95fbf25

SHA256
52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec

SHA512
1adea0d508fe2c2c2bc793907241467d80644d58cdda0da6269e32148f5f94fff19834a03f59f79ac8f21565acd0e861b4c5a4fe20526a4a584980381fe2ab61

Download Submit
C:\Users\Admin\AppData\Local\Temp\mas.exe

Filesize
307KB

MD5
0eaf291e0565a86af393bc576ebf0140

SHA1
78ca77d73e696c08c75d0a3ca3d43833f95fbf25

SHA256
52e8e2163c3918de5cb183abe3be134e11d83436d239e78e571fa9c198973fec

SHA512
1adea0d508fe2c2c2bc793907241467d80644d58cdda0da6269e32148f5f94fff19834a03f59f79ac8f21565acd0e861b4c5a4fe20526a4a584980381fe2ab61

Download Submit
memory/2156-138-0x0000000074E20000-0x00000000753D1000-memory.dmp

Filesize
5.7MB

Download
memory/2156-139-0x0000000074E20000-0x00000000753D1000-memory.dmp

Filesize
5.7MB

Download
memory/4908-132-0x0000000074E20000-0x00000000753D1000-memory.dmp

Filesize
5.7MB

Download
memory/4908-137-0x0000000074E20000-0x00000000753D1000-memory.dmp

Filesize
5.7MB

Download