djvu | f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742

Analysis

max time kernel
144s
max time network
126s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
22/05/2024, 10:20

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
Size 707KB
Sample240522-mdklmsbg41
SHA256 f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742
MD5 5855e0aa6fddd49c2a10916168549895
SHA1 961fbc732efcfc4842ab4bd356be530dfb383149
SHA512 4af9581ca386412911b91de2fb6bc1ab14a3a98a6b5f72077a243b30ccf894c6e0de7ad906587c015d5776271faaff6d6aebf9f09506c1274b06d20607f1ecfb
SSDEEP 12288:mQ2yr8271g1GoGbPFeCeUvKf42EOzRFSEyITOWPg5sI2ffJCP9VNwMO:mQ2LcPFx5vKw2EO1o5i7fBww
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

resource	yara_rule
behavioral2/memory/3316-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp	family_djvu
behavioral2/memory/1792-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1792-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1792-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1792-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1792-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2384-37-0x0000000000400000-0x0000000000537000-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

pid	Process
4036	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0666dc5e-e375-4d0c-b8fe-6ab42b638728\\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe\" --AutoStart"	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.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.

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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3316 set thread context of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 996 set thread context of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
2384	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
2384	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 3316 wrote to memory of 1792	3316	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	81
PID 1792 wrote to memory of 4036	1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	82
PID 1792 wrote to memory of 4036	1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	82
PID 1792 wrote to memory of 4036	1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	82
PID 1792 wrote to memory of 996	1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	83
PID 1792 wrote to memory of 996	1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	83
PID 1792 wrote to memory of 996	1792	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	83
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87
PID 996 wrote to memory of 2384	996	f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe	87

C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
"C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3316
- C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
  "C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1792
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0666dc5e-e375-4d0c-b8fe-6ab42b638728" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4036
- - C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
    "C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:996
  - - C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
      "C:\Users\Admin\AppData\Local\Temp\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
MD5 6728aea2631b86a76c237508d8ba9b55
SHA1 7a670f95cac088313f7558869162fe01c6dc0ec9
SHA512 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 b1d7c96a8451ec1d09daa5f467706c946d5bae3e17d9109597164d1b6a66ebd5
MD5 0a3c103c6ea6c2101c4b4936cd5768c9
SHA1 00c903563abcd5e3ed4d8392c7d68f6c49a1c46c
SHA512 327b56f7fcbe9f2976f3289365a7865835b5fa2f0fa65c22f4540889dfa90db5352a10db4be8e4d3a76a701856904ab72bc7066b4848807a11e9f3219a5864e5
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 2736e262f3af082048cef5f960f63f0103d8d4081215c7b5775284be3daad056
MD5 d4e7aab7b5444065c9d0cec65a96e46a
SHA1 ead5cfb5adb69e7b6e43ec1db200cdd0d07fc4cb
SHA512 29fb98ce25b5a6eeca9fdeef1e7013c4d6d556e9786f5b007c0a984695d0c66473c4df1d4cdb21aaeb457fc933f3c8120c277c6c9f98b0eb308e63e91656fdb5
MD5 SHA1 SHA512

Submit Download

f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe

Path C:\Users\Admin\AppData\Local\0666dc5e-e375-4d0c-b8fe-6ab42b638728\f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742.exe
Size 707KB
SHA256 f888bb2bdc08ff5d6bf8b5f68aa7bee1265484d644611bab8cad8e1e31422742
MD5 5855e0aa6fddd49c2a10916168549895
SHA1 961fbc732efcfc4842ab4bd356be530dfb383149
SHA512 4af9581ca386412911b91de2fb6bc1ab14a3a98a6b5f72077a243b30ccf894c6e0de7ad906587c015d5776271faaff6d6aebf9f09506c1274b06d20607f1ecfb
SSDEEP 12288:mQ2yr8271g1GoGbPFeCeUvKf42EOzRFSEyITOWPg5sI2ffJCP9VNwMO:mQ2LcPFx5vKw2EO1o5i7fBww
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1792-6-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1792-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1792-19-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1792-4-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1792-5-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-29-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-22-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-27-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-28-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-32-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-34-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-35-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2384-37-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3316-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp

Download

memory/3316-1-0x0000000004A10000-0x0000000004AAC000-memory.dmp

Download