5c396be42657aecabd75f8be6ac9b3af96fa1243a4a50214b3543617f39d6c5b

Analysis

max time kernel
62s
max time network
67s
platform
windows10_x64
resource
win10-en-20211208
submitted
13/12/2021, 10:39

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General

Target

WinCrypto Ransomware.exe
Size

4.4MB
MD5

27786f44811d4832d01246e529b94320
SHA1

b31bd516fe0ca01cd139739867ae2c60054dc328
SHA256

5c396be42657aecabd75f8be6ac9b3af96fa1243a4a50214b3543617f39d6c5b
SHA512

1904e09f2a963b725493bb11b9b18f43ffb9e132114bdcd3f05816ee80d50fcca181482bced3fafd739c425b09e6864bec93bbc4ea1365da7ffdb1dc81734dea

Score

10^/10

persistence ransomware

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\README WINCRYPTO.txt

Ransom Note

WINCRYPTO RANSOMWARE YOUR DOCUMENTS, PHOTOS, DATABASES AND OTHER IMPORTANT FILES HAS BEEN ENCRYPTED! THE ONLY WAY TO DECRYPT YOUR FILES IS TO RECEIVE THE PRIVATE KEY AND DECRYPTION SOFTWARE. TO RECEIVE THE PRIVATE KEY AND DECRYPTION SOFTWARE GO TO ANY DECRYPTED FOLDER - INSIDE THERE IS THE SPECIAL FILE 'README WINCRYPTO.TXT' WITH COMPLETE INSTRUCTIONS HOW TO DECRYPT YOUR FILES. IF YOU CANNOT FIND ANY 'README WINCRYPTO.TXT' FILE AT YOUR PC. FOLLOW THE INSTRUCTIONS BELOW. 1. DOWNLOAD 'TOR BROWSER' FROM 'HTTPS://TORPROJECT.ORG' AND INSTALL IT. 2. IN THE 'TOR BROWSER' OPEN YOUR PERSONAL PAGE HERE. HTTPS://WINCRYPTO23XA93KU9234XN.ONION/7U2D-23MA-0M8C-M2AS NOTE! THIS PAGE IS AVAILABLE VIA 'TOR BROWSER' ONLY. FILE RECOVERY IS IMPOSSIBLE WHEN ANTI-VIRUS IS ACTIVATED AND THIS SOFTWARE IS TERMINATED!

Signatures

Modifies extensions of user files 1 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\RedoGet.png => C:\Users\Admin\Pictures\RedoGet.png.wincrypto	WinCrypto Ransomware.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	WinCrypto Ransomware.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\OperaSetups = "C:\\Users\\Admin\\AppData\\Roaming\\RuntimeBroker\\RuntimeBroker.exe"	WinCrypto Ransomware.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3824	WinCrypto Ransomware.exe

C:\Users\Admin\AppData\Local\Temp\WinCrypto Ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\WinCrypto Ransomware.exe"
1⤵
- Modifies extensions of user files
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:3824

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3824-115-0x0000000000D90000-0x0000000000D91000-memory.dmp

Filesize
4KB

Download
memory/3824-117-0x0000000005BB0000-0x0000000005BB1000-memory.dmp

Filesize
4KB

Download
memory/3824-118-0x0000000006150000-0x0000000006151000-memory.dmp

Filesize
4KB

Download
memory/3824-119-0x0000000005C50000-0x0000000005C86000-memory.dmp

Filesize
216KB

Download
memory/3824-120-0x0000000005D30000-0x0000000005D31000-memory.dmp

Filesize
4KB

Download
memory/3824-121-0x0000000005C50000-0x000000000614E000-memory.dmp

Filesize
5.0MB

Download
memory/3824-122-0x0000000005D20000-0x0000000005D21000-memory.dmp

Filesize
4KB

Download
memory/3824-123-0x0000000005C50000-0x000000000614E000-memory.dmp

Filesize
5.0MB

Download