3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db

General

Target

3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe
Size

1.1MB
MD5

885a6b438fe3c23b4d8d09c43034d173
SHA1

e5993444aca13b4526a96e36e594dcc61a9022b1
SHA256

3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db
SHA512

dd23455c1c1102af094cc7a8d2397359eeda0e609c94f435424c202615f8a002df34e8db89a0a6499138b0a4ad8733886e809fc444f9249acd976996b1e3644a

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

vpn.exevpn.exe

pid process

4396 vpn.exe
3768 vpn.exe

pid	process
4396	vpn.exe
3768	vpn.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

Processes:

3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vpn.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\vpn.exe -boot"	vpn.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

36 bot.whatismyipaddress.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

vpn.exe

description pid process target process

PID 4396 set thread context of 3768 4396 vpn.exe vpn.exe

flow	ioc
36	bot.whatismyipaddress.com

description	pid	process	target process
PID 4396 set thread context of 3768	4396	vpn.exe	vpn.exe

Drops file in Windows directory 4 IoCs

Processes:

3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exevpn.exe

description	ioc	process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	vpn.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	vpn.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.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 2 IoCs

Processes:

3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exevpn.exe

pid process

4168 3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe
4396 vpn.exe

pid	process
4168	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe
4396	vpn.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exevpn.exe

description	pid	process
Token: SeDebugPrivilege	4168	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe
Token: SeDebugPrivilege	4396	vpn.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exeexplorer.exevpn.exe

description	pid	process	target process
PID 4168 wrote to memory of 3012	4168	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe	explorer.exe
PID 4168 wrote to memory of 3012	4168	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe	explorer.exe
PID 4168 wrote to memory of 3012	4168	3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe	explorer.exe
PID 2100 wrote to memory of 4396	2100	explorer.exe	vpn.exe
PID 2100 wrote to memory of 4396	2100	explorer.exe	vpn.exe
PID 2100 wrote to memory of 4396	2100	explorer.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe
PID 4396 wrote to memory of 3768	4396	vpn.exe	vpn.exe

C:\Users\Admin\AppData\Local\Temp\3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe
"C:\Users\Admin\AppData\Local\Temp\3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4168
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\System32\explorer.exe" /c select, C:\Users\Admin\AppData\Roaming\vpn.exe
  2⤵
  PID:3012

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Users\Admin\AppData\Roaming\vpn.exe
  "C:\Users\Admin\AppData\Roaming\vpn.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4396
- - C:\Users\Admin\AppData\Roaming\vpn.exe
    "C:\Users\Admin\AppData\Roaming\vpn.exe"
    3⤵
    - Executes dropped EXE
    PID:3768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\vpn.exe.log

Filesize
518B

MD5
6f7d75899d5427a4ada7a840a7a04d5c

SHA1
99eb2c39ba43c7e65dc798fe8b52c53de03816ea

SHA256
a027cb814313e8be32f1be8b9d39bb0ba03263c6fde02e6b8ee69e5b925db67e

SHA512
4ed2f02a9966ef1511399770fbfa2a06700fe184d365284d9031041bb641cf55717797c6935e8d192620961e49cca8ad24a96cc0af883ee9b7733940f5356a24

Download Submit
C:\Users\Admin\AppData\Roaming\vpn.exe

Filesize
1.1MB

MD5
885a6b438fe3c23b4d8d09c43034d173

SHA1
e5993444aca13b4526a96e36e594dcc61a9022b1

SHA256
3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db

SHA512
dd23455c1c1102af094cc7a8d2397359eeda0e609c94f435424c202615f8a002df34e8db89a0a6499138b0a4ad8733886e809fc444f9249acd976996b1e3644a

Download Submit
C:\Users\Admin\AppData\Roaming\vpn.exe

Filesize
1.1MB

MD5
885a6b438fe3c23b4d8d09c43034d173

SHA1
e5993444aca13b4526a96e36e594dcc61a9022b1

SHA256
3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db

SHA512
dd23455c1c1102af094cc7a8d2397359eeda0e609c94f435424c202615f8a002df34e8db89a0a6499138b0a4ad8733886e809fc444f9249acd976996b1e3644a

Download Submit
C:\Users\Admin\AppData\Roaming\vpn.exe

Filesize
1.1MB

MD5
885a6b438fe3c23b4d8d09c43034d173

SHA1
e5993444aca13b4526a96e36e594dcc61a9022b1

SHA256
3a81cf5da9b70be10b5ee6d4bd488ddb768d9f63ca459963051dbc30bd4455db

SHA512
dd23455c1c1102af094cc7a8d2397359eeda0e609c94f435424c202615f8a002df34e8db89a0a6499138b0a4ad8733886e809fc444f9249acd976996b1e3644a

Download Submit
C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch

Filesize
514B

MD5
4c62b64d103651e6b6dd6803f9d040bd

SHA1
26002e6b44837bae7932cf7b7d6f33fb48995f55

SHA256
b10b15e3bc9f99490664958a9c908fc824ab7132f6b72972dc0ef685d33edf72

SHA512
ce6d71d9944ec43761113b6d03bfefcd5d26c0d22e044100a42666c734f22ed7589fc8871a127da931604861960348735d0a9a95450587c387a1357c9122f52d

Download Submit
C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch

Filesize
514B

MD5
4c62b64d103651e6b6dd6803f9d040bd

SHA1
26002e6b44837bae7932cf7b7d6f33fb48995f55

SHA256
b10b15e3bc9f99490664958a9c908fc824ab7132f6b72972dc0ef685d33edf72

SHA512
ce6d71d9944ec43761113b6d03bfefcd5d26c0d22e044100a42666c734f22ed7589fc8871a127da931604861960348735d0a9a95450587c387a1357c9122f52d

Download Submit
memory/3012-132-0x0000000000000000-mapping.dmp

Download
memory/3768-144-0x0000000073FC0000-0x0000000074571000-memory.dmp

Filesize
5.7MB

Download
memory/3768-141-0x0000000000000000-mapping.dmp

Download
memory/3768-146-0x0000000073FC0000-0x0000000074571000-memory.dmp

Filesize
5.7MB

Download
memory/3768-148-0x0000000073FC0000-0x0000000074571000-memory.dmp

Filesize
5.7MB

Download
memory/4168-130-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4168-133-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4168-131-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/4396-135-0x0000000000000000-mapping.dmp

Download
memory/4396-139-0x0000000073FC0000-0x0000000074571000-memory.dmp

Filesize
5.7MB

Download
memory/4396-140-0x0000000073FC0000-0x0000000074571000-memory.dmp

Filesize
5.7MB

Download
memory/4396-145-0x0000000073FC0000-0x0000000074571000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads