djvu | db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0

Analysis

max time kernel
146s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
30/05/2024, 04:41

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General

Target
db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
Size 792KB
Sample240530-fa8ezafa2v
SHA256 db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0
MD5 20993754a99d0079eb09d268a7ae0152
SHA1 0b8f94f30db044fe623901c2ebaad1473a6914a3
SHA512 cdd4c6207b24528ba0509d8dd9863b9db5d812239d2e06befee3bc1ba9328707cb6337e0f713b1de24d2c1e17dfe3ad7ecf1374e676e5f8bbd8ba3a39d72d27a
SSDEEP 12288:mBi4YSFa34Zi/59I7BL/E4Zo737v9ZH+2PMUPuaqamsXQIP2veGorj+AKJspS0Uu:GYSFaImq7vof9ZH+kBzbmsRo46AScfK
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/3032-2-0x0000000003E60000-0x0000000003F7B000-memory.dmp	family_djvu
behavioral2/memory/5076-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5076-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5076-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5076-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5076-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4664-37-0x0000000000400000-0x0000000000537000-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
2368	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-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\44095c69-699c-4a4f-966d-270d7ec876ae\\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe\" --AutoStart"	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.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
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3032 set thread context of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 1520 set thread context of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83

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
5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
4664	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
4664	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 3032 wrote to memory of 5076	3032	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	78
PID 5076 wrote to memory of 2368	5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	79
PID 5076 wrote to memory of 2368	5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	79
PID 5076 wrote to memory of 2368	5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	79
PID 5076 wrote to memory of 1520	5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	80
PID 5076 wrote to memory of 1520	5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	80
PID 5076 wrote to memory of 1520	5076	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	80
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83
PID 1520 wrote to memory of 4664	1520	db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe	83

C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
"C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
  "C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5076
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\44095c69-699c-4a4f-966d-270d7ec876ae" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2368
- - C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
    "C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1520
  - - C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
      "C:\Users\Admin\AppData\Local\Temp\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4664

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

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 e398b27255350eb1740b6851d4ca1faabc2b8c5ddd8caa791a47fc15af730060
MD5 6b5dad23fd7edd2c9daf944abc5d5341
SHA1 63a720a1bd0d9e2ecf288f11529f00256970577d
SHA512 870f71e1f8724c984d51600080c43562303263c5ae4b9bf648fcf28909a88141a00db0e88b5ec52fc938c81ba78cb31a92a60792ff74b2369fdf10932d7e540c
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 3b4c7e9c475347787b55328bc243b98f2ceab5a83a15a7725097db1297f3a399
MD5 9913ead2c3e6775f11c826acfebe5250
SHA1 ed2a1691381d2e79f79c328e107268ccdbe8e1c3
SHA512 90d1d2ca2a546245a3545ccba1ab6cd2801fe1471326fe86c8a51543bff3f3c149818bf7c577b032c475d96cea75df835770b3048369783875034e6774eb7194
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 55cc7803342e9600e9f51463c48d6cf8c7dfef5b55cd28f04df357b341e4d1f4
MD5 7d2a41235a75e3357d5609190c813940
SHA1 e113e863af594b876d1b48ed6d6699da58d3104c
SHA512 93146b344bd779b1c6512f59456abce069baa1d664fcb10a6d5fd7a9dd8ac1721d0bd4b2473ec71d5def2d641ebcd422f4dfb7e9f1afa5c1690f5d76e05ffc5f
MD5 SHA1 SHA512

Submit Download

db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe

Path C:\Users\Admin\AppData\Local\44095c69-699c-4a4f-966d-270d7ec876ae\db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0.exe
Size 792KB
SHA256 db80fe864b6e9fc64be43b0115da8dedcaca4e94021b871dd433bd67b3e272d0
MD5 20993754a99d0079eb09d268a7ae0152
SHA1 0b8f94f30db044fe623901c2ebaad1473a6914a3
SHA512 cdd4c6207b24528ba0509d8dd9863b9db5d812239d2e06befee3bc1ba9328707cb6337e0f713b1de24d2c1e17dfe3ad7ecf1374e676e5f8bbd8ba3a39d72d27a
SSDEEP 12288:mBi4YSFa34Zi/59I7BL/E4Zo737v9ZH+2PMUPuaqamsXQIP2veGorj+AKJspS0Uu:GYSFaImq7vof9ZH+kBzbmsRo46AScfK
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3032-2-0x0000000003E60000-0x0000000003F7B000-memory.dmp

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memory/3032-1-0x0000000003DC0000-0x0000000003E53000-memory.dmp

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memory/4664-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4664-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5076-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5076-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5076-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5076-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5076-19-0x0000000000400000-0x0000000000537000-memory.dmp

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