djvu | 9c43b8f6793d12e08d84a3380c338675473db6c17838831a76d3b480b493c5c5

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
17-07-2024 10:22

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General

Target

4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
Size

837KB
MD5

b3757b09ed2150ce857f446c0c61363c
SHA1

04536100a4a8fc27dde91e006f4e2ea6b398b65e
SHA256

4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981
SHA512

c7fb0efb95a96177bcbc50a60f2d900f4f7328a0a98a64ead6fc6e00f52502c904815e1e0a8b309a764c77db1fa65a8e5da5104593e0d987fb6bf3f794a82119
SSDEEP

24576:c3eL/rX2Ev8KDHwSPxDwauHfz/eicEeb+8TYLL:NLz7x7PP+H7e0YfT4

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
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. 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/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0874PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral20/memory/4848-2-0x0000000003F10000-0x000000000402B000-memory.dmp	family_djvu
behavioral20/memory/1484-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/1484-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/1484-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/1484-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/1484-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral20/memory/4992-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-464762018-485119342-1613148473-1000\Control Panel\International\Geo\Nation	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3360	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-1-5-21-464762018-485119342-1613148473-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2fccef40-5aac-4275-94ea-7acfd5336657\\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe\" --AutoStart"	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.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
26	api.2ip.ua
27	api.2ip.ua
32	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4848 set thread context of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 3984 set thread context of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97

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
1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
4992	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
4992	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 4848 wrote to memory of 1484	4848	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	91
PID 1484 wrote to memory of 3360	1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	92
PID 1484 wrote to memory of 3360	1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	92
PID 1484 wrote to memory of 3360	1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	92
PID 1484 wrote to memory of 3984	1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	93
PID 1484 wrote to memory of 3984	1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	93
PID 1484 wrote to memory of 3984	1484	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	93
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97
PID 3984 wrote to memory of 4992	3984	4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe	97

C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
"C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4848
- C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
  "C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1484
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2fccef40-5aac-4275-94ea-7acfd5336657" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3360
- - C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
    "C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3984
  - - C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe
      "C:\Users\Admin\AppData\Local\Temp\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4992

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
1bfe0a81db078ea084ff82fe545176fe

SHA1
50b116f578bd272922fa8eae94f7b02fd3b88384

SHA256
5ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f

SHA512
37c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
3b08239eec1d998bbdf3dd50bcb0038b

SHA1
b40aad03daf40646a362f3a9a3d65e34e701c899

SHA256
dfc624c736120f87b0e35e62351059a47d8614b162d4799ecd30aa1bb6937f43

SHA512
24654eefaa5134b0e77432dea1f8e395418a5ce2fe2ad6c75bab24e9f9048f26d408ff7a82d43b9467c792e2b037d546b12f71193194c1055bf2de070a5d37be

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
2ab836e4bf9de12d065130a7158beeb2

SHA1
205261776cc862398ea91f2c8da77467a4f94727

SHA256
9554592a1527adf118925840f18cb127f3e75d7b2c51d92f4358aa11e6cfe0e4

SHA512
f5de1f071bd08bab835f226dbef26628d466e624cb4e55a46a472ceb95e700cc57d69d17c669f6ce8d4ebc424093c1567d69a54c61a6cf70047499412f1784ef

Download Submit
C:\Users\Admin\AppData\Local\2fccef40-5aac-4275-94ea-7acfd5336657\4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981.exe

Filesize
837KB

MD5
b3757b09ed2150ce857f446c0c61363c

SHA1
04536100a4a8fc27dde91e006f4e2ea6b398b65e

SHA256
4bb311ba0e479264b1d3c7deab5bfb44b0c1fb100d82aa7d605369b0ac938981

SHA512
c7fb0efb95a96177bcbc50a60f2d900f4f7328a0a98a64ead6fc6e00f52502c904815e1e0a8b309a764c77db1fa65a8e5da5104593e0d987fb6bf3f794a82119

Download Submit
memory/1484-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1484-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1484-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1484-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1484-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3984-41-0x0000000000400000-0x000000000211B000-memory.dmp

Filesize
29.1MB

Download
memory/3984-23-0x0000000000400000-0x000000000211B000-memory.dmp

Filesize
29.1MB

Download
memory/4848-2-0x0000000003F10000-0x000000000402B000-memory.dmp

Filesize
1.1MB

Download
memory/4848-1-0x0000000003DE0000-0x0000000003E74000-memory.dmp

Filesize
592KB

Download
memory/4992-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4992-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download