djvu | 59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8

Analysis

max time kernel
143s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
29/05/2024, 20:16

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General

Target
59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
Size 790KB
Sample240529-y2jvsshd46
SHA256 59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8
MD5 0f89ef31d7f84d0ee58cb2f2b2b22391
SHA1 595bad9bbd63d41f59dbda2fea9aebf22c2360b6
SHA512 1bffbaa0f5da35e20e4caec05bce0821fed9caf97333c9b9b0993d8acfc2ca4bddb911764fb740573684441c058c08162571a59c35d801040d95eccab706e901
SSDEEP 12288:psi4YSFos/Nodd4iUnIuh6FqE0JzdYajxgpQWc/7t+08ytAVnSvjQ+2fVjOB:IYSFo6y4i5P0MMxg6W49JqlSvjQPfd
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/2312-2-0x0000000003E90000-0x0000000003FAB000-memory.dmp	family_djvu
behavioral2/memory/3544-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3544-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3544-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3544-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3544-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4488-37-0x0000000000400000-0x0000000000537000-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
236	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f9939914-7fda-4e01-812b-9c871e73cace\\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe\" --AutoStart"	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.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
7	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2312 set thread context of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 3812 set thread context of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82

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
3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
4488	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
4488	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 2312 wrote to memory of 3544	2312	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	77
PID 3544 wrote to memory of 236	3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	78
PID 3544 wrote to memory of 236	3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	78
PID 3544 wrote to memory of 236	3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	78
PID 3544 wrote to memory of 3812	3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	79
PID 3544 wrote to memory of 3812	3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	79
PID 3544 wrote to memory of 3812	3544	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	79
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82
PID 3812 wrote to memory of 4488	3812	59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe	82

C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
"C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
  "C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3544
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f9939914-7fda-4e01-812b-9c871e73cace" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:236
- - C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
    "C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3812
  - - C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
      "C:\Users\Admin\AppData\Local\Temp\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4488

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 c419f082161c6938bfb7e7b721ffc2ce738fc24890e5044a370aa46b7f48c440
MD5 7accdd5ae68e7d4e5811a515b58f3e42
SHA1 a0dae23c3fb9029e0fb0c899a1d8b3c507fc3aad
SHA512 7e7e5ed2422b74c230ff1c5f3e855fc8efe4d6788041641f0d5f53d8150c7f8a94314ec8d1c660d8fac714367a8f17d1eac209ffec669a94aee4b8ba7e352594
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 1234afd0fc4b8cd20f43f1ac85efac7ca6d576541e9694e37041e3d482ab7f75
MD5 9e66a356d45e050af50a5aafac31e467
SHA1 4d5c3e11045a44ad0fb30c0e27d2e4fb00b81f6a
SHA512 9a61c9c4e8d3761f323a2f8bded7eaeee1f432322f834d0853ef4fdfcf16cbc8da0a5a921bc52a6fed4f6a16d8d7bdb92423d71877897efb17e22b21e55f4aa1
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 3a5c535897294330765f2df9305cc2b0b1e8ca072fe5d1beaa84e7ef1f97d683
MD5 7c3edf31f36e08125491bb7b7ad874c1
SHA1 fb21c6adfceb9c8d02a04f0a1eeea1286d5911bc
SHA512 b0413b001e98957db34defdd1474a870b6c97c08c2f33aab43eb8d765e71f6c2fafeea7c084199228cc327380d921ffde519e57e0c5f569268a3ce82f5b15f3b
MD5 SHA1 SHA512

Submit Download

59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe

Path C:\Users\Admin\AppData\Local\f9939914-7fda-4e01-812b-9c871e73cace\59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8.exe
Size 790KB
SHA256 59fed10b19f206437c7136c7de9472dca1134299b9e020d37fe21e81301c05a8
MD5 0f89ef31d7f84d0ee58cb2f2b2b22391
SHA1 595bad9bbd63d41f59dbda2fea9aebf22c2360b6
SHA512 1bffbaa0f5da35e20e4caec05bce0821fed9caf97333c9b9b0993d8acfc2ca4bddb911764fb740573684441c058c08162571a59c35d801040d95eccab706e901
SSDEEP 12288:psi4YSFos/Nodd4iUnIuh6FqE0JzdYajxgpQWc/7t+08ytAVnSvjQ+2fVjOB:IYSFo6y4i5P0MMxg6W49JqlSvjQPfd
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2312-2-0x0000000003E90000-0x0000000003FAB000-memory.dmp

Download

memory/2312-1-0x0000000002210000-0x00000000022A8000-memory.dmp

Download

memory/3544-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3544-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3544-19-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3544-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3544-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4488-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4488-37-0x0000000000400000-0x0000000000537000-memory.dmp

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