djvu | 1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7

Analysis

max time kernel
293s
max time network
257s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
05/05/2024, 22:24

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General

Target
1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
Size 817KB
Sample240505-2bsxkaaf84
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/4968-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4968-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4968-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4968-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4196-3-0x00000000037B0000-0x00000000038CB000-memory.dmp	family_djvu
behavioral2/memory/4968-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4928-36-0x0000000000400000-0x0000000000537000-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
1720	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-1-5-21-3968772205-1713802336-1776639840-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5a510830-c304-46bb-b086-e746f31d103b\\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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4196 set thread context of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 220 set thread context of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76

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
4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
4928	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
4928	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4196 wrote to memory of 4968	4196	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	72
PID 4968 wrote to memory of 1720	4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4968 wrote to memory of 1720	4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4968 wrote to memory of 1720	4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	73
PID 4968 wrote to memory of 220	4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 4968 wrote to memory of 220	4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 4968 wrote to memory of 220	4968	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 220 wrote to memory of 4928	220	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76

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:4196
- 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:4968
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\5a510830-c304-46bb-b086-e746f31d103b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1720
- - 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:220
  - - C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
      "C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4928

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 e8569d7b34f8be2c39d098acfc395bde7c314d0ad55b1efefca52ebb3fd3c06a
MD5 aba874fc4f2284853fb8b79aadaeb991
SHA1 e5eafdcc5da8536f1d3a6d138466bb026c0704ad
SHA512 c97cc627ea538fcea4dcb5aefc497adb24c919046d5b6393fdc5c747511d23893d53c612579fadfb8338d6754fa12ba247b1a44a86b0802d075fc6cf2ebf1553
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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 c09594be6a7423d9a341ef4f6284a1772ce092492de96425dc7ac89dbce9ff34
MD5 118169d396c0a12257dcc1d5e245e033
SHA1 9ede8fbd9b602d9a167fcd37a35ed92678d5ca12
SHA512 f9e96c792f052c76cec766a88fbc497fdc67c58628418d31446334f71b07ed428ec519306515ae607bb01e6a33ce856536c311fcb61efb1dc4a724bd8d2567cb
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 2589b54ce3c3c7931d65fa3726715d7b573de4d0119837c344add67d4d059467
MD5 1ee89600c2b10979bb2509520f9d2fd5
SHA1 e6285d01c4ce2fdcadc7f065a5e42ec42247eaba
SHA512 bd80d361a6bdfdf3277b1648195f0e92d3845267e58950286d131e5dad315cb19bd635908804472f4c03abcfec24209a9869a2408b05a87c490b01086b74242a
MD5 SHA1 SHA512

Submit Download

1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe

Path C:\Users\Admin\AppData\Local\5a510830-c304-46bb-b086-e746f31d103b\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
Size 817KB
SHA256 1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7
MD5 448f59f13d35b3dbeb22e4595a65e73d
SHA1 1eaabeefaa29d9471fcf7b12027e5a8c34bc8055
SHA512 1d196737ad8ec66a6a9bdfdb1ae8be36c6e9d672dc3e39af2ae306ca04fe8fd1c8d6cb332352ad64de2cd3f70f068843e7f217a17694dc78dcd915ee1a6e5473
SSDEEP 12288:53ejEV2Hmv6undB7k5ZSpP1gVJESArszthCUBFh5dsAm8LUH4ctYftWbDRK0:tiGB7k3kd1PrsDFBNiQIH4bfSD
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4196-3-0x00000000037B0000-0x00000000038CB000-memory.dmp

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memory/4196-1-0x0000000003710000-0x00000000037A4000-memory.dmp

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memory/4928-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4928-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4928-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4928-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4928-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4928-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4928-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4928-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4968-19-0x0000000000400000-0x0000000000537000-memory.dmp

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