djvu | f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e

General

Target

f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
Size

733KB
MD5

8ca4e6f32c4f0ca55963d2719ae94a1c
SHA1

16487b0129fed84f05ad959f32f5ca1669f1d8b9
SHA256

f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e
SHA512

6975fe9a36740c1edc711afb68463b77090e15305355a3e82861721ccdd440bfae29f03b9a5da8b82f5125075a73678a54c7f72408ea99db3d9b4699d64948bd
SSDEEP

12288:Gl/6v07qke/ROYqGQslDPL9zEJ3YUCZfFlHpKDcCLVAtQQctFlD5r4:Glw7/8YpdbpzwgaT/rjO

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4496-2-0x0000000004B20000-0x0000000004C3B000-memory.dmp	family_djvu
behavioral2/memory/4452-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4452-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4452-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4452-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4452-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/896-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

3664 icacls.exe

pid	process
3664	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b76ef633-1fb6-4815-be0a-3d7e9396affb\\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe\" --AutoStart"	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

1 api.2ip.ua
2 api.2ip.ua
7 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

description	pid	process	target process
PID 4496 set thread context of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 set thread context of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

pid	process
4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
896	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
896	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4496

C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4452

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\b76ef633-1fb6-4815-be0a-3d7e9396affb" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:3664

C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2360

C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:896

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
dd3850d9ce5a33ba453ba4d1dfb4ba51

SHA1
df05b044dd14e7d009aad0398686bbfd6fff1491

SHA256
e9e041a83d7f3dbd6adfeda50b7ff9d3fd1abfcfb4fc5906d481c33db7072b85

SHA512
ec27ccc61d0133a76a612d5ddde2c6193f96302e17f66a75da8e1ad18ee871fe6b307e535317726449dc724331d4f48376d03201ad8d9dc2985aa0420d45b8e4

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
49883498c86b3414d4731eee945c9a38

SHA1
cd71a1de2fb77d8bd51ed9dca60053d52b3e5af9

SHA256
b1082885c82cf5182fd4d9c57fd5cb0b3f3e38eb91241eabe7535daf551d3b8d

SHA512
802a7d0c36e122edf163970007aae84280e79f874a7e03efb4b724c01bc5f781ec608c5aae189ffb3040fe3ee8d2f8cfe61ea46aed24d6c1af3c924c89746c3d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
f61cdd041d95a62a7e32c774b49b6e83

SHA1
b722304d67bdf448db431684b42dbcd0d52f7d97

SHA256
b9321cbca2af89528aebd7212ccc7314eebb9713bce44a1ce7f3506af1e4bcb3

SHA512
a3275140516d37b7c83ea51a8ea47759f83e848d884ab2eff84973002dded7eff0ebceab010f82069cac55a68fd03144933d01010e749c8e553ce0071f0a471e

Download Submit
C:\Users\Admin\AppData\Local\b76ef633-1fb6-4815-be0a-3d7e9396affb\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
Filesize
733KB

MD5
8ca4e6f32c4f0ca55963d2719ae94a1c

SHA1
16487b0129fed84f05ad959f32f5ca1669f1d8b9

SHA256
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e

SHA512
6975fe9a36740c1edc711afb68463b77090e15305355a3e82861721ccdd440bfae29f03b9a5da8b82f5125075a73678a54c7f72408ea99db3d9b4699d64948bd

Download Submit
memory/896-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/896-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4452-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4452-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4452-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4452-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4452-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4496-2-0x0000000004B20000-0x0000000004C3B000-memory.dmp

Filesize
1.1MB

Download
memory/4496-1-0x0000000004A80000-0x0000000004B14000-memory.dmp

Filesize
592KB

Download

description	pid	process	target process
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4496 wrote to memory of 4452	4496	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4452 wrote to memory of 3664	4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	icacls.exe
PID 4452 wrote to memory of 3664	4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	icacls.exe
PID 4452 wrote to memory of 3664	4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	icacls.exe
PID 4452 wrote to memory of 2360	4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4452 wrote to memory of 2360	4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 4452 wrote to memory of 2360	4452	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
PID 2360 wrote to memory of 896	2360	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe	f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads