a2768bd2301f387a40cd9cbfea05af2f5a68791dce758e5ba9db29ff29e74f57

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 - addressesupcr@protonmail.com BTC Address: bc1qnwdt2068q2asdxa9etz4epu44pf4z98m7e28l2

Emails

addressesupcr@protonmail.com

URLs

https

Signatures

Executes dropped EXE 1 IoCs

Processes:

cobra.exe

pid process

1308 cobra.exe

pid	process
1308	cobra.exe

Modifies extensions of user files 7 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

cobra.exe

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

Processes:

CacheTask.exe

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

Processes:

cobra.exe

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

Processes:

CacheTask.execobra.exe

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

Processes:

cobra.exe

description pid process

Token: SeDebugPrivilege 1308 cobra.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

CacheTask.exe

pid process

1576 CacheTask.exe
1576 CacheTask.exe

description	pid	process
Token: SeDebugPrivilege	1308	cobra.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

CacheTask.exe

description	pid	process	target process
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	cobra.exe
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	cobra.exe
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	cobra.exe
PID 1576 wrote to memory of 1308	1576	CacheTask.exe	cobra.exe

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

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Defacement

1

T1491

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Downloads

C:\Users\Public\Documents\cobra.exe
MD5
96abad6cc44497291f8398a78389f064

SHA1
7297914534b2c1f07ef1c29a4476cd1c3fa6aa3c

SHA256
3f6b8214ecf761a419ca664c022c68d10aa3d6e905aa539796821a0083c0a52e

SHA512
9a098b6fa47f80435f4d66eeeeb34a717a0993f859b6e4cef2497e16fc01513693f6fb91f53f83096093cd17f051329584933269af5210c39720ed0d328d316d

Download Submit
C:\Users\Public\Documents\desktop.kew
MD5
15d99631b520d4919e935381597c3b97

SHA1
8b837107f3248c1a5739a3f0dbf0b4c55cf3a782

SHA256
481299e2f3d6d08e652cc85f471200b5fdda00a71186d734953f93ffdce6883d

SHA512
7536e0b835ccf7244e7dbb635a4475c9009718bb28519e591d5c0cc2e72552c9885c410dabc75630dfec47c66db012697770a8891dcb61c85fc5bcfd45ba764f

Download Submit
C:\Users\Public\Documents\pukey.kew
MD5
4f89fddea85c6b426b7a2f09990cc44e

SHA1
36bde319718941777732b7b95cb35158259ff07d

SHA256
b000437b1118009a578b0c59b1e2561f384cd322717e979c67d9cb58f8a582e5

SHA512
cfddf945c6244dd32d6eac5ec2a68496e080a582413ce44657f1f8779da26bdf03ffe44b993f896572f19e8603402f5745afbe0f530cc964c909e1d80f82f021

Download Submit
\Users\Public\Documents\cobra.exe
MD5
96abad6cc44497291f8398a78389f064

SHA1
7297914534b2c1f07ef1c29a4476cd1c3fa6aa3c

SHA256
3f6b8214ecf761a419ca664c022c68d10aa3d6e905aa539796821a0083c0a52e

SHA512
9a098b6fa47f80435f4d66eeeeb34a717a0993f859b6e4cef2497e16fc01513693f6fb91f53f83096093cd17f051329584933269af5210c39720ed0d328d316d

Download Submit
\Users\Public\Documents\cobra.exe
MD5
96abad6cc44497291f8398a78389f064

SHA1
7297914534b2c1f07ef1c29a4476cd1c3fa6aa3c

SHA256
3f6b8214ecf761a419ca664c022c68d10aa3d6e905aa539796821a0083c0a52e

SHA512
9a098b6fa47f80435f4d66eeeeb34a717a0993f859b6e4cef2497e16fc01513693f6fb91f53f83096093cd17f051329584933269af5210c39720ed0d328d316d

Download Submit
memory/1308-56-0x0000000000000000-mapping.dmp

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

Filesize
8KB

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

Filesize
8KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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