djvu | 8ed183df76d08024f15e051f4f5711535dde6372ff4beafecfff07f82e846800

Analysis

max time kernel
23s
max time network
123s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
01-01-2024 15:12

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General

Target

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
Size

732KB
MD5

9346199aa06d8fa74051e98b06cd3d26
SHA1

9020c5dbcb80340517916272f2479001b2bfdff3
SHA256

5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f
SHA512

a7e4b195c6eefa011b729deb32ffe533ef61bb2126e68272cba26ec8b2fc49b3e75327abb9f916530db911a1b7854020234300a02c87c65d6cd89b661ce18f58
SSDEEP

12288:FEIJVxZIpeKXqWdXoeSPEWOSNXCdepyeEPbObcy9BwoWNffeKuIhQ+0F:F3VxZIprXqWdXoDPEWO8XCdebcONXwoy

Score

10^/10

djvu discovery ransomware

Malware Config

Extracted

Family

djvu

http://acacaca.org/test1/get.php

Attributes

extension
.dkrf
offline_id
JPKXWc5eWNjIicWmQyJxv6NCjbH02qrKi0af9Zt1
payload_url
http://rgyui.top/dl/build2.exe

http://acacaca.org/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. You can get and look video overview decrypt tool: https://we.tl/t-aMsnHoiJcO 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: 0508Usjdjs

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral15/memory/2876-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/2876-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/2876-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/2384-5-0x0000000001DB0000-0x0000000001ECB000-memory.dmp	family_djvu
behavioral15/memory/2876-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-72-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-71-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-73-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-77-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-80-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-79-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral15/memory/1116-81-0x0000000000400000-0x0000000000537000-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
2400	icacls.exe

Looks up external IP address via web service 4 IoCs

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

flow	ioc
6	api.2ip.ua
17	api.2ip.ua
3	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2384 set thread context of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20
PID 2384 wrote to memory of 2876	2384	5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe	20

C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
"C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
  "C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe"
  2⤵
  PID:2876
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\612965a2-4e45-44e4-ad6e-1743252c8630" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2400
- - C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
    "C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    PID:776
  - - C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe
      "C:\Users\Admin\AppData\Local\Temp\5d96952d473d386285f01726073d8f1ec46c983fe4c9d657babe9272330d655f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:1116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/776-48-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/776-49-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/1116-72-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-77-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-81-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-79-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-80-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-73-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-71-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1116-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2384-0-0x00000000004C0000-0x0000000000552000-memory.dmp

Filesize
584KB

Download
memory/2384-6-0x00000000004C0000-0x0000000000552000-memory.dmp

Filesize
584KB

Download
memory/2384-5-0x0000000001DB0000-0x0000000001ECB000-memory.dmp

Filesize
1.1MB

Download
memory/2876-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2876-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2876-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2876-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2876-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download