djvu | 1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7

Analysis

max time kernel
293s
max time network
300s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
04/05/2024, 22:22

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General

Target
1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
Size 817KB
Sample240504-198j8sdc2v
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/4940-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4940-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4940-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5116-5-0x0000000003750000-0x000000000386B000-memory.dmp	family_djvu
behavioral2/memory/4940-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4940-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1728-36-0x0000000000400000-0x0000000000537000-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
2184	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\\50e85b36-aa96-4209-8a87-5ea7e8fa5c6c\\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 5116 set thread context of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 3756 set thread context of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78

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
4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
1728	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
1728	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 5116 wrote to memory of 4940	5116	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	74
PID 4940 wrote to memory of 2184	4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	75
PID 4940 wrote to memory of 2184	4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	75
PID 4940 wrote to memory of 2184	4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	75
PID 4940 wrote to memory of 3756	4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 4940 wrote to memory of 3756	4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 4940 wrote to memory of 3756	4940	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	76
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78
PID 3756 wrote to memory of 1728	3756	1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe	78

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:5116
- 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:4940
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\50e85b36-aa96-4209-8a87-5ea7e8fa5c6c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2184
- - 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:3756
  - - C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
      "C:\Users\Admin\AppData\Local\Temp\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1728

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 c90743b555faf3ed141c4c83e5002c4da6445c3be1ad82b01c98da2201cf6818
MD5 9ed6fed9b6e5aaa9afcba833c1b8c259
SHA1 2ed30daf7f0277a0718b3d9ce46b0658640cc2ba
SHA512 a9abd9ca06479e56d08e1649b344cfd06beec24567d1053616670afd7f47757d7ab186c2cd20d21f53a901ede92b14382fc42ab21df6605d69702c0368106367
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 810a6b12bc56a869daedacf8b798a9123df672fff738aea7c7e73494dd17f525
MD5 50367ef5bea3a77d0eab16aa50588c25
SHA1 bd7232cb1be67fe7e812ede3fbb1436748b020fb
SHA512 06e7e8e30c30232f4553e4d5e00c1a0507a5e39fd6f74f75ca829028a400229717d7d386279995a816a8bd904f3b2708dd3e8ef5ea0c533129643179322ce48b
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 a4ceb7e03841b8cc4a3aa80475bd17a277947879fa5c954d5de2ecc9cae79796
MD5 78edcf747f07e4b77a6e000803e84113
SHA1 1fb156ab11246e47207aaec9e0c6b0d6741cf649
SHA512 b33f48ea27da53458726abca8e32cce82af70f4180c585c3b84b1624dc0d446702616c85eadb7d90cd41d6db712889f7f0f06ca01fa89a4d271345b585547309
MD5 SHA1 SHA512

Submit Download

1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe

Path C:\Users\Admin\AppData\Local\50e85b36-aa96-4209-8a87-5ea7e8fa5c6c\1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7.exe
Size 817KB
SHA256 1cb53aea2de9f1eec1e57c213ab26494e73580fbf03d7d3413db09bded680de7
MD5 448f59f13d35b3dbeb22e4595a65e73d
SHA1 1eaabeefaa29d9471fcf7b12027e5a8c34bc8055
SHA512 1d196737ad8ec66a6a9bdfdb1ae8be36c6e9d672dc3e39af2ae306ca04fe8fd1c8d6cb332352ad64de2cd3f70f068843e7f217a17694dc78dcd915ee1a6e5473
SSDEEP 12288:53ejEV2Hmv6undB7k5ZSpP1gVJESArszthCUBFh5dsAm8LUH4ctYftWbDRK0:tiGB7k3kd1PrsDFBNiQIH4bfSD
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1728-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1728-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1728-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1728-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1728-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1728-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1728-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1728-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4940-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4940-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4940-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4940-1-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4940-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5116-5-0x0000000003750000-0x000000000386B000-memory.dmp

Download

memory/5116-3-0x00000000036B0000-0x000000000374E000-memory.dmp

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