djvu | 347c3b434e770b38ce06819cad853f93cb139fb4304e40a78933d92f56749d12

General

Target

file.exe
Size

778KB
MD5

3d3158bde3e31d3b7b9c1e1e2398ddd5
SHA1

f1d1ff15a739eb1fc5460c3dff7b2ad78ca53788
SHA256

347c3b434e770b38ce06819cad853f93cb139fb4304e40a78933d92f56749d12
SHA512

5b7016ac1d24913b28447980e51f0a7ebd9cd6fe370772409f402c04ea009384656913527a1c3e63c215bcda19b63080c636c3516cd21ee1f477479081e94a7d
SSDEEP

12288:U/2nq6Bx5H+0g3zSKAPIOLTGEuSzbgQX6D3V6YzN4188r6McBg7bO0RtrEhXM:UGqmeXSKnKRsc7CKjrABg766ri

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test2/get.php

Attributes

extension
.nbwr
offline_id
csCsb6cUvy0iMa6NgGCGH0hSfXQlGjZVEmFVkgt1
payload_url
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. You can get and look video overview decrypt tool: https://we.tl/t-8dGJ2tqlOd Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0833ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 11 IoCs

resource	yara_rule
behavioral2/memory/4700-2-0x0000000002A60000-0x0000000002B7B000-memory.dmp	family_djvu
behavioral2/memory/3172-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3172-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3172-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3172-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3172-10-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1704-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1704-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1704-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1704-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1704-22-0x0000000000400000-0x0000000000537000-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
4672	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-1-5-21-3936660601-1848837011-2142350499-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\71fc2f58-93ba-43e0-8500-5fd99ed4bf29\\file.exe\" --AutoStart"	file.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4700 set thread context of 3172	4700	file.exe	92

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3172	file.exe
3172	file.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 4700 wrote to memory of 3172	4700	file.exe	92
PID 3172 wrote to memory of 4672	3172	file.exe	93
PID 3172 wrote to memory of 4672	3172	file.exe	93
PID 3172 wrote to memory of 4672	3172	file.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3172
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\71fc2f58-93ba-43e0-8500-5fd99ed4bf29" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4672
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    PID:4444
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:1704

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\71fc2f58-93ba-43e0-8500-5fd99ed4bf29\file.exe

Filesize
778KB

MD5
3d3158bde3e31d3b7b9c1e1e2398ddd5

SHA1
f1d1ff15a739eb1fc5460c3dff7b2ad78ca53788

SHA256
347c3b434e770b38ce06819cad853f93cb139fb4304e40a78933d92f56749d12

SHA512
5b7016ac1d24913b28447980e51f0a7ebd9cd6fe370772409f402c04ea009384656913527a1c3e63c215bcda19b63080c636c3516cd21ee1f477479081e94a7d

Download Submit
memory/1704-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1704-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-10-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3172-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4444-13-0x00000000027B0000-0x0000000002844000-memory.dmp

Filesize
592KB

Download
memory/4700-2-0x0000000002A60000-0x0000000002B7B000-memory.dmp

Filesize
1.1MB

Download
memory/4700-1-0x00000000029C0000-0x0000000002A57000-memory.dmp

Filesize
604KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads