djvu | 54ee98582d3733d200040666a41685a51467de8ed0f6e06bd076fb94ee7ec1a9

Analysis

max time kernel
143s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2024, 10:12

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General

Target
file.exe
Size 744KB
Sample240122-l8tmcsedd9
SHA256 54ee98582d3733d200040666a41685a51467de8ed0f6e06bd076fb94ee7ec1a9
MD5 6f0e5ad311936054a33eb7287c594521
SHA1 c973d47705660081bcbce5a99832c5f035168776
SHA512 a00a696feee34b30eaa3dc88878d649ea824d82abf67fbcfd058a2942d52a0092f750e3a41abc303b8b04a33b05a34b528be4e9827a272a40067e66ba8fa367d
SSDEEP 12288:heZ8Ft+DSpr3jXVtrw2iiIhzKW8jZv+U6da6dLMpzecpMa007b3MwERN6WG0uy+E:he8thTXg1TvOZv+U6dJpD6WSfE
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdtt
offline_id
Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1
payload_url
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. You can get and look video overview decrypt tool: https://we.tl/t-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0845OSkw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/1516-2-0x00000000025B0000-0x00000000026CB000-memory.dmp	family_djvu
behavioral2/memory/4492-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4492-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4492-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4492-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4492-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2400-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2868	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-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ac50cef4-1824-4c09-bc8d-215fd0bca4c0\\file.exe\" --AutoStart"	file.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
4	api.2ip.ua
7	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1516 set thread context of 4492	1516	file.exe	86
PID 1228 set thread context of 2400	1228	file.exe	93

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
4492	file.exe
4492	file.exe
2400	file.exe
2400	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 1516 wrote to memory of 4492	1516	file.exe	86
PID 4492 wrote to memory of 2868	4492	file.exe	90
PID 4492 wrote to memory of 2868	4492	file.exe	90
PID 4492 wrote to memory of 2868	4492	file.exe	90
PID 4492 wrote to memory of 1228	4492	file.exe	91
PID 4492 wrote to memory of 1228	4492	file.exe	91
PID 4492 wrote to memory of 1228	4492	file.exe	91
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93
PID 1228 wrote to memory of 2400	1228	file.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1516
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4492
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ac50cef4-1824-4c09-bc8d-215fd0bca4c0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2868
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1228
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2400

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

Query Registry

T1012

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 876c691b537616a3b2f3c480edf644060cb72c92254be828c11c040c857be6ed
MD5 64e836a61886ec9e8b2669670291803a
SHA1 64303e0bb55dec85bbb71d8fa346e4ba8add8eed
SHA512 4824cf64d7d97b0fd7ed5e5710273127102a47fa5e8b57320b33a338399da78c49bc1a306b5051a4e717ac32fa721b78cccfa7ce12e89b09db6c37feca874d41
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 1ee1c314abdeadf0cdd91d48ef10c8786cf1bcaa96139c51d641c58a407ed1b6
MD5 464d70a3ccabed7f592ca089bf03a412
SHA1 ff90e988608ca21ee740362a327c90379800d622
SHA512 e16eb201b81687952096032ad7286a988f54cf4fdbf7e000f47625a6568d72d0bbf197b3fed28c2796cce0edb0afbfbaa3edfe4dffef1fe3459d0f883b96b2b8
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 b1ad301a5db2ddd937c008e26363f48f8fa949ee0bc798a6fe470c4cfd76960e
MD5 a7d6804ab184c1dcaaa958f5cff57505
SHA1 16c14370760e365421529e2201d9d0e68fbf5b54
SHA512 02fc04582773af101fc6ab790d4317db59f0a424efc40ba6a06b3c401b08e66bac6b8ea003d0efd16691db4d83a1b88ded8c6e9880d03a06b277e0bd2daa7a58
MD5 SHA1 SHA512

Submit Download

file.exe

Path C:\Users\Admin\AppData\Local\ac50cef4-1824-4c09-bc8d-215fd0bca4c0\file.exe
Size 744KB
SHA256 54ee98582d3733d200040666a41685a51467de8ed0f6e06bd076fb94ee7ec1a9
MD5 6f0e5ad311936054a33eb7287c594521
SHA1 c973d47705660081bcbce5a99832c5f035168776
SHA512 a00a696feee34b30eaa3dc88878d649ea824d82abf67fbcfd058a2942d52a0092f750e3a41abc303b8b04a33b05a34b528be4e9827a272a40067e66ba8fa367d
SSDEEP 12288:heZ8Ft+DSpr3jXVtrw2iiIhzKW8jZv+U6da6dLMpzecpMa007b3MwERN6WG0uy+E:he8thTXg1TvOZv+U6dJpD6WSfE
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1228-18-0x0000000000B00000-0x0000000000B95000-memory.dmp

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memory/1516-2-0x00000000025B0000-0x00000000026CB000-memory.dmp

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memory/1516-1-0x0000000000B20000-0x0000000000BC0000-memory.dmp

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memory/2400-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2400-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4492-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4492-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4492-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4492-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4492-15-0x0000000000400000-0x0000000000537000-memory.dmp

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