djvu | 1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7

Analysis

max time kernel
291s
max time network
289s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/05/2024, 22:29

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General

Target
1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
Size 817KB
Sample240507-2elbwsbd9y
SHA256 1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7
MD5 448f59f13d35b3dbeb22e4595a65e73d
SHA1 1eaabeefaa29d9471fcf7b12027e5a8c34bc8055
SHA512 1d196737ad8ec66a6a9bdfdb1ae8be36c6e9d672dc3e39af2ae306ca04fe8fd1c8d6cb332352ad64de2cd3f70f068843e7f217a17694dc78dcd915ee1a6e5473
SSDEEP 12288:53ejEV2Hmv6undB7k5ZSpP1gVJESArszthCUBFh5dsAm8LUH4ctYftWbDRK0:tiGB7k3kd1PrsDFBNiQIH4bfSD
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral2/memory/1532-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4892-5-0x00000000037D0000-0x00000000038EB000-memory.dmp	family_djvu
behavioral2/memory/1532-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4636-38-0x0000000000400000-0x0000000000537000-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
3600	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-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d8c7b308-e472-401b-a0f5-b2f7cd440893\\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe\" --AutoStart"	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.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
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4892 set thread context of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 2636 set thread context of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77

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
1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
4636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
4636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4892 wrote to memory of 1532	4892	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 1532 wrote to memory of 3600	1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 1532 wrote to memory of 3600	1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 1532 wrote to memory of 3600	1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 1532 wrote to memory of 2636	1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	75
PID 1532 wrote to memory of 2636	1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	75
PID 1532 wrote to memory of 2636	1532	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	75
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77
PID 2636 wrote to memory of 4636	2636	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	77

C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
"C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4892
- C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
  "C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1532
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d8c7b308-e472-401b-a0f5-b2f7cd440893" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3600
- - C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
    "C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2636
  - - C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
      "C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4636

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 26f7df2742be7eae0cecb3954ab69d2f1ad25c6b63a21e3a477ea34dee8301ae
MD5 af14424bd91fa356e225129fe451aacc
SHA1 4046dc95051bf8382196ff1fec36326c22dc1aae
SHA512 362068ce189ee00c318b574ebc8fc4f2e09add21f6c79aea8fe2f69ece44c0beaeb6c7fec7297a0b758ea5b8879ab0e9993c74ab262e200e289c05833e734179
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 fe90ee4dca42488ec3a5444ec0361e491d5bef205af9399f8707f29f13aceddc
MD5 bb131e8b38d9e5366a96c9b3cfbdea67
SHA1 628984cfd531690277bcf7689f0bd5e322930c0d
SHA512 2761537073c41074c6ca6ef15cb5eadeeed7239205d3edcd696228cfaaf5e5d3d6045331f235cedd7b774a99256eccb2e18f24b1d5ae032c5363721f97fa8d0f
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 7ae88c3f813c9cb8c08a02fcec8eee3bc8306ae57204703fe25b04d45c094079
MD5 86121b6729716ed0c128b1a504df7b01
SHA1 edf14a3262050a86e62f447c96dff078a1014ddf
SHA512 2894c62ce3f3e6d840f5ea44929dfeb19a4507e7a717e6049fcf40137f8293488af78036a2d1d1cd6f762c01586e5d23c6c70c556fb6a2b4a837ce08ef827cac
MD5 SHA1 SHA512

Submit Download

1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe

Path C:\Users\Admin\AppData\Local\d8c7b308-e472-401b-a0f5-b2f7cd440893\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
Size 817KB
SHA256 1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7
MD5 448f59f13d35b3dbeb22e4595a65e73d
SHA1 1eaabeefaa29d9471fcf7b12027e5a8c34bc8055
SHA512 1d196737ad8ec66a6a9bdfdb1ae8be36c6e9d672dc3e39af2ae306ca04fe8fd1c8d6cb332352ad64de2cd3f70f068843e7f217a17694dc78dcd915ee1a6e5473
SSDEEP 12288:53ejEV2Hmv6undB7k5ZSpP1gVJESArszthCUBFh5dsAm8LUH4ctYftWbDRK0:tiGB7k3kd1PrsDFBNiQIH4bfSD
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1532-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1532-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4636-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4892-5-0x00000000037D0000-0x00000000038EB000-memory.dmp

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memory/4892-1-0x0000000003730000-0x00000000037CC000-memory.dmp

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