djvu | 3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe

Analysis

max time kernel
141s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
04/05/2024, 22:10

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General

Target
3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
Size 774KB
Sample240504-13nw9ach2s
SHA256 3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe
MD5 384c3b29fa6133e729935cfc7e1c5472
SHA1 1cf7b27af78d099cceb891dc83d11b0c44b31e97
SHA512 04cdb0dda7ada79a9a049385776c4102bd80bf8354a1eef4ceddf1c619723418ccddc68f5fb38fb8fadaa2f886deab56077c615f7f164a19d80dc1c75bdcfe2e
SSDEEP 24576:JXkCuJNMor20dvGaJoedS4xgEFMNmTmJ:1kC0rrv5R1xgEGmT
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/1508-2-0x0000000004990000-0x0000000004AAB000-memory.dmp	family_djvu
behavioral2/memory/4972-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-41-0x0000000000400000-0x0000000000537000-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
1224	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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\941fde3b-cfed-45fb-94ca-e1a7def05895\\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe\" --AutoStart"	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.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
2	api.2ip.ua
8	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1508 set thread context of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 2064 set thread context of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87

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
4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
1228	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
1228	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 1508 wrote to memory of 4972	1508	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	82
PID 4972 wrote to memory of 1224	4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	83
PID 4972 wrote to memory of 1224	4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	83
PID 4972 wrote to memory of 1224	4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	83
PID 4972 wrote to memory of 2064	4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	84
PID 4972 wrote to memory of 2064	4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	84
PID 4972 wrote to memory of 2064	4972	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	84
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87
PID 2064 wrote to memory of 1228	2064	3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe	87

C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
"C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1508
- C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
  "C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4972
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\941fde3b-cfed-45fb-94ca-e1a7def05895" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1224
- - C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
    "C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2064
  - - C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
      "C:\Users\Admin\AppData\Local\Temp\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1228

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 efdba3e18e3b3843e909e85990814663b6f3f90c3a1b6f58534bf3d50f9a6947
MD5 d01d026339a888fa591c670210c7db39
SHA1 79931c35f2f31c649b6d45be5d180f3097a80aa5
SHA512 a899644a30b75d28df55187caaf51b4a3119c2367c20b41d06a1aaf76ebb76ad6f4e81e2dc03d1b3f8394e78026e00e915d02afb7f6dcef6db5d7c4cfd2c1f6f
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 e8bac41e2dcb57ca533002b990b593098a2be93fe4793f3dd3284f585459ae66
MD5 b244c7a4f54d459931552ea306e0d7b3
SHA1 dee05feb16d30be77b578539540d179f034c46c6
SHA512 5bd87681342e741111dbc099ccd46c62789efd481fca04ca63fdcd02c142ec88f906741d1064f600bbf075037521242845f3a3ab7944fb22f070fe8a9939e445
MD5 SHA1 SHA512

Submit Download

3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe

Path C:\Users\Admin\AppData\Local\941fde3b-cfed-45fb-94ca-e1a7def05895\3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe.exe
Size 774KB
SHA256 3db7ace246b7ceb73ceb8f086cb36bb8366cf1c6e1009b41913b93a083a75dfe
MD5 384c3b29fa6133e729935cfc7e1c5472
SHA1 1cf7b27af78d099cceb891dc83d11b0c44b31e97
SHA512 04cdb0dda7ada79a9a049385776c4102bd80bf8354a1eef4ceddf1c619723418ccddc68f5fb38fb8fadaa2f886deab56077c615f7f164a19d80dc1c75bdcfe2e
SSDEEP 24576:JXkCuJNMor20dvGaJoedS4xgEFMNmTmJ:1kC0rrv5R1xgEGmT
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1228-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1228-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1508-1-0x0000000003040000-0x00000000030D7000-memory.dmp

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memory/1508-2-0x0000000004990000-0x0000000004AAB000-memory.dmp

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memory/4972-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-21-0x0000000000400000-0x0000000000537000-memory.dmp

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