a2768bd2301f387a40cd9cbfea05af2f5a68791dce758e5ba9db29ff29e74f57

Resubmissions

08/01/2022, 05:42

220108-gd2x2adbhp 10

08/01/2022, 05:22

220108-f2qn8scge3 10

Analysis

max time kernel
357s
max time network
365s
platform
windows7_x64
resource
win7-en-20211208
submitted
08/01/2022, 05:22

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Report Analysis Logs

General

Target

CacheTask.exe
Size

10.0MB
MD5

c004d38310f828f384f4360591b2c090
SHA1

65c38148bbba7114556aab0d1aeb05d419fa590f
SHA256

a2768bd2301f387a40cd9cbfea05af2f5a68791dce758e5ba9db29ff29e74f57
SHA512

fdac8e831957d34095d034e3a9cf62f8e92c1bee781a87babb1eb30e046cb7646f717fe87311beeffccaba614a28d9b1099b6fcee2038faa17c087ade2d1f87b

Score

10^/10

ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Public\Desktop\How to restore your files.txt

Ransom Note

All of your files have been encrypted. Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help. What can I do to get my files back? You can buy our special decryption software,this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is 0.5 BTC. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? Purchasing Bitcoin varies from country to country,you are best advised to do a quick google search yourself to find how to buy Bitcoin? Many of our customers have reported these sites to be fast and reliable : Coinmama - https ://www.coinmama.com Bitpanda - https ://www.bitpanda.com Contacts - [email protected] BTC Address: bc1qnwdt2068q2asdxa9etz4epu44pf4z98m7e28l2

Emails

[email protected]

URLs

https

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1308	cobra.exe

Modifies extensions of user files 7 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\SyncRestore.tif.locked	cobra.exe
File opened for modification	C:\Users\Admin\Pictures\CheckpointPush.raw.locked	cobra.exe
File opened for modification	C:\Users\Admin\Pictures\ConnectInvoke.tiff.locked	cobra.exe
File opened for modification	C:\Users\Admin\Pictures\ConvertFromUse.png.locked	cobra.exe
File opened for modification	C:\Users\Admin\Pictures\ExpandConvertTo.png.locked	cobra.exe
File opened for modification	C:\Users\Admin\Pictures\NewSuspend.tif.locked	cobra.exe
File opened for modification	C:\Users\Admin\Pictures\ResumeBackup.tif.locked	cobra.exe

Loads dropped DLL 2 IoCs

pid	Process
1576	CacheTask.exe
1576	CacheTask.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Public\\Documents\\desktop.kew"	cobra.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 29 IoCs

pid	Process
1576	CacheTask.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe
1308	cobra.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1308	cobra.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1576	CacheTask.exe
1576	CacheTask.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	27
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	27
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	27
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	27

C:\Users\Admin\AppData\Local\Temp\CacheTask.exe
"C:\Users\Admin\AppData\Local\Temp\CacheTask.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1576
- C:\Users\Public\Documents\cobra.exe
  C:\Users\Public\Documents\cobra.exe
  2⤵
  - Executes dropped EXE
  - Modifies extensions of user files
  - Sets desktop wallpaper using registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1308

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1432

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

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Downloads

memory/1432-60-0x000007FEFC2B1000-0x000007FEFC2B3000-memory.dmp

Filesize
8KB

Download
memory/1576-53-0x0000000076451000-0x0000000076453000-memory.dmp

Filesize
8KB

Download