djvu | 63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
29/04/2024, 23:51

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General

Target
63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
Size 711KB
Sample240429-3weq4seb22
SHA256 63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4
MD5 b9f2dd17edf2ddfabe42c1d41d90b7d2
SHA1 679ebbc4fc5a599c4228af35c7132b7424d755d4
SHA512 67a2934e23c78872b71dcfb5524d1b721aec69a3a8dbfbf1c59e8820f3d1440c8e0cf6749579dc8746a9f8006b7149bec82becfc351d852dc5e1893eb6de95c6
SSDEEP 12288:RcKJg4xQbZijWfb2wj5Tp4pNKcpiOr6ZHLswsUDaMRH5mxcUyak+zprzz:R5tx7WDXt4pYOrAHLswDsxKanprzz
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 15 IoCs

resource	yara_rule
behavioral2/memory/4952-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4952-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4952-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4952-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1748-2-0x0000000004AB0000-0x0000000004BCB000-memory.dmp	family_djvu
behavioral2/memory/4952-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4504-42-0x0000000000400000-0x0000000000537000-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
1488	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-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\55052526-48dd-4628-a20e-f20c7b32a18d\\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe\" --AutoStart"	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.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 1748 set thread context of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 3448 set thread context of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86

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
4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
4504	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
4504	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 1748 wrote to memory of 4952	1748	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	81
PID 4952 wrote to memory of 1488	4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	82
PID 4952 wrote to memory of 1488	4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	82
PID 4952 wrote to memory of 1488	4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	82
PID 4952 wrote to memory of 3448	4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	83
PID 4952 wrote to memory of 3448	4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	83
PID 4952 wrote to memory of 3448	4952	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	83
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86
PID 3448 wrote to memory of 4504	3448	63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe	86

C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
"C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
  "C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4952
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\55052526-48dd-4628-a20e-f20c7b32a18d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1488
- - C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
    "C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3448
  - - C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
      "C:\Users\Admin\AppData\Local\Temp\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4504

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 880e9493a52a3726a09faee961611cd35b857043ddc50846e648febf0b22099d
MD5 1516a6f80d6bb7cbea2876c52e1e2ff0
SHA1 b13a9a9e8a99d2d94ab66fdeec970252cf0c1258
SHA512 8626fd39c4f26a0c41c097fc055a67e9ca9b088bfd1232e4fe8df92dbb9649696e4efe1e602b55802c674b72acd83745cd5a4eb9f71df48e34fc86bedc600102
MD5 SHA1 SHA512

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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 a18d3a7735f4901e549f4d0b1702f1c01830f6a3169fef7c2d453d5dfcf95bb6
MD5 b26e9b0a44629ed65ba966d40776f134
SHA1 96778c8368e37a85a8aa90c81d03d33b1e770547
SHA512 4ea9317b6a1bd3b74446a5096b483316ffe4d87560f600dad6110b55961e74a7099aab6da719f7be35ce95c04ce5fac444b7b5112e8a4d92626a204bd65e873d
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 72451c324286ca62d470e01cd220a62f3ad068057d6e1a9e9b18967e13305348
MD5 c38cd9abecbe6467d0a099438c25ee76
SHA1 ef6f6852c3e301484c03fe64f6594bb5cf4ae6aa
SHA512 8bfdaea098e9d2af4a8a3de10189dcdd5d0fc9a46afaf06cfdbe360eae4d4b0958d8b0de058fcb03b9e5740505af41858874a4668d9da3f58ac13cf9ea5e025b
MD5 SHA1 SHA512

Submit Download

63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe

Path C:\Users\Admin\AppData\Local\55052526-48dd-4628-a20e-f20c7b32a18d\63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4.exe
Size 711KB
SHA256 63a489cf5215279c1c5d8a3f62e12d301d53c7101acc728555c25ab49261f6b4
MD5 b9f2dd17edf2ddfabe42c1d41d90b7d2
SHA1 679ebbc4fc5a599c4228af35c7132b7424d755d4
SHA512 67a2934e23c78872b71dcfb5524d1b721aec69a3a8dbfbf1c59e8820f3d1440c8e0cf6749579dc8746a9f8006b7149bec82becfc351d852dc5e1893eb6de95c6
SSDEEP 12288:RcKJg4xQbZijWfb2wj5Tp4pNKcpiOr6ZHLswsUDaMRH5mxcUyak+zprzz:R5tx7WDXt4pYOrAHLswDsxKanprzz
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1748-1-0x0000000003040000-0x00000000030D3000-memory.dmp

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memory/1748-2-0x0000000004AB0000-0x0000000004BCB000-memory.dmp

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memory/4504-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-42-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4504-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4952-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4952-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4952-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4952-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4952-21-0x0000000000400000-0x0000000000537000-memory.dmp

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