djvu | 8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 23:58

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General

Target
8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
Size 732KB
Sample240531-31e8faba74
SHA256 8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc
MD5 7069515bab98d36f0ee96d3fe92e5620
SHA1 6b6491ed06abdb7fdc0fe14e5b1323f6a81fd67c
SHA512 88bf89f39684a90fe20095d72d7052584a1868979213821cc19a1af444ed7649d7898af9395f2d82840d435ec2769dc6cb5267ba739325f73b95853c2b741aed
SSDEEP 12288:3diCREoWP0MrWsJrQkA5gT5XaQlVyrbkcJL353E15wqp1U/PdGrNQ++BF/y:3diC+aMFJrQ56OvkAL9E1vpKP2+3/y
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/4168-2-0x0000000004A10000-0x0000000004B2B000-memory.dmp	family_djvu
behavioral2/memory/1048-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1048-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1048-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1048-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1048-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4024-41-0x0000000000400000-0x0000000000537000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1960	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-1-5-21-1162180587-977231257-2194346871-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\03ab8435-2c95-4e94-8e9b-fd780f6c9d76\\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe\" --AutoStart"	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.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
4	api.2ip.ua
5	api.2ip.ua
17	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4168 set thread context of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 2308 set thread context of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89

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
1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
4024	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
4024	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 4168 wrote to memory of 1048	4168	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	85
PID 1048 wrote to memory of 1960	1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	86
PID 1048 wrote to memory of 1960	1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	86
PID 1048 wrote to memory of 1960	1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	86
PID 1048 wrote to memory of 2308	1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	87
PID 1048 wrote to memory of 2308	1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	87
PID 1048 wrote to memory of 2308	1048	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	87
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89
PID 2308 wrote to memory of 4024	2308	8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe	89

C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
"C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4168
- C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
  "C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\03ab8435-2c95-4e94-8e9b-fd780f6c9d76" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1960
- - C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
    "C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2308
  - - C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
      "C:\Users\Admin\AppData\Local\Temp\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4024

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

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 e3e96522b5106c9c4012ceedf303ed88a127dc7d5977254cac063c77870de651
MD5 ee1b1eb1cedb6cb147cfdc92cf7f8314
SHA1 457fc613e09aeb00000745cd238e8b4235ac2423
SHA512 f55143bb13428541b0fb142c063fb5c393b4545cfa02725c9ed4eb488a6fe3ec796f7e8e21dc22972108a55468c6249fea512df84e3cd9ac1cd7394020c42a5a
MD5 SHA1 SHA512

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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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 000e53d92dfc00a84b8aa5c55c81820c324f882c51f378a06192b0feccccd153
MD5 5698b8a64d04f063f0ffc608cbe84408
SHA1 027c9cf1961c3fa765f67740bfa402a46b53d911
SHA512 dd902564e4ae079d5d5a06c802234d67e970baafacc24858aab3adbfccd2d1317055a4cd0a01c2a064eb152e3a84c0a88c2cec50dc9aba75d722de0d325baa1a
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 ef2b6025cb9707227c5f20a8982d872570bd636f0c4983a51dca4ea2e4c95e4a
MD5 113ba8a61367ec313ad4c99e8e331f0d
SHA1 59d1476c80610ddbd1e7ace3d273a5c86238aee5
SHA512 2d721ab715eff6cb7bfae7283c461a446a700fa3acdb19207c7910f39089c30718283ccb7d08efea38d59345e58ce7419f587bd19b401230a2d18a7ef95cee82
MD5 SHA1 SHA512

Submit Download

8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe

Path C:\Users\Admin\AppData\Local\03ab8435-2c95-4e94-8e9b-fd780f6c9d76\8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc.exe
Size 732KB
SHA256 8543aea054700ae27d32766bc20f352943adaee5e2534eb89d63db8be15f10cc
MD5 7069515bab98d36f0ee96d3fe92e5620
SHA1 6b6491ed06abdb7fdc0fe14e5b1323f6a81fd67c
SHA512 88bf89f39684a90fe20095d72d7052584a1868979213821cc19a1af444ed7649d7898af9395f2d82840d435ec2769dc6cb5267ba739325f73b95853c2b741aed
SSDEEP 12288:3diCREoWP0MrWsJrQkA5gT5XaQlVyrbkcJL353E15wqp1U/PdGrNQ++BF/y:3diC+aMFJrQ56OvkAL9E1vpKP2+3/y
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1048-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1048-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1048-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1048-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1048-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4024-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4168-2-0x0000000004A10000-0x0000000004B2B000-memory.dmp

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memory/4168-1-0x0000000004970000-0x0000000004A07000-memory.dmp

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