djvu | f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622

Analysis

max time kernel
143s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
17/04/2024, 10:01

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General

Target
f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
Size 805KB
Sample240417-l2f3pabe69
SHA256 f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622
MD5 6fa7f90ec7adf855f9411e0284670d78
SHA1 9bf0820c0ee92f40814a17905276b94bce3cbcbb
SHA512 783a8121f99b918b131cc700570354b3b83b787daaa4d76fc75cfc1d21826a096603ab19fa99ae12ec313c532c4cbe07b059980aaa78d311bf5def85f61caf0c
SSDEEP 12288:Qdok5UugqXKWpiR1w25lLI5aOqnLkELmAc/HvJAdwDMJHFw/OR:QdmcXKWAAuI59qLPzw4Jll
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://sajdfue.com/test1/get.php

Attributes

extension
.uajs
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0859PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/476-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2768-4-0x0000000004C90000-0x0000000004DAB000-memory.dmp	family_djvu
behavioral2/memory/476-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/476-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/476-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/476-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2972-39-0x0000000000400000-0x0000000000537000-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
1132	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-1-5-21-801878912-692986033-442676226-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\81c83d35-21a9-407d-844a-baa698bcbf87\\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe\" --AutoStart"	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.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 2768 set thread context of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 1704 set thread context of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.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
476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
2972	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
2972	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 2768 wrote to memory of 476	2768	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	81
PID 476 wrote to memory of 1132	476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	82
PID 476 wrote to memory of 1132	476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	82
PID 476 wrote to memory of 1132	476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	82
PID 476 wrote to memory of 1704	476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	83
PID 476 wrote to memory of 1704	476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	83
PID 476 wrote to memory of 1704	476	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	83
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86
PID 1704 wrote to memory of 2972	1704	f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe	86

C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
"C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
  "C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:476
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\81c83d35-21a9-407d-844a-baa698bcbf87" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1132
- - C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
    "C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1704
  - - C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
      "C:\Users\Admin\AppData\Local\Temp\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2972

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 3e95b831913d3d7205a09c98cc185943fd810f6e2582607a54fa1e9cc30731aa
MD5 84cc91708c444c30647ef07922bac2f1
SHA1 97fec2794e5f14b4a9e54366d723d781161d7fb9
SHA512 cc75685d2259bd362c076ce4941e9ce19d129801a9337e5d44f91de332d67f64f921d1a5870bf9ab5375ad2bc95a98398d7de91a8b72887767532e5933b3a175
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 608ef1a7bc5ee338c4f8a037e74047a40cf159c3f35440cf53043986b5d40c6f
MD5 6401041096b3e7fe715e0daf9aaf2121
SHA1 99cc1ad7f4406ecdb35e4efe1a80da8f242c18f4
SHA512 f07ac752e49da557ffb32990533a7fad4e1da2caae5859a6b5a0dc0abe9f7fd875a16737f37ff6bd8757cedf821eaf5eb58aa6b55a82814c8728eb9070e40ff1
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 1decf12c16e1817cc0a32fac7626d2650384d4505e40ae3be06f3813532864c6
MD5 84704ac88070f7f6f8a1e6c6e2ca6efe
SHA1 1de0cf5dcf641af5a00ba5081941b6bdf6b4fb44
SHA512 2d63920c4719b8773c8568928532d1893f27970015ca3e84b922738a44f41a3bcbe128b5c625a04ba9160f7ebaea2aab88a389719e8df9ace45428213e4df915
MD5 SHA1 SHA512

Submit Download

f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe

Path C:\Users\Admin\AppData\Local\81c83d35-21a9-407d-844a-baa698bcbf87\f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622.exe
Size 805KB
SHA256 f96884cbf2261dec2e16dcab33e0795298138f3e353fbff8ce4363f705640622
MD5 6fa7f90ec7adf855f9411e0284670d78
SHA1 9bf0820c0ee92f40814a17905276b94bce3cbcbb
SHA512 783a8121f99b918b131cc700570354b3b83b787daaa4d76fc75cfc1d21826a096603ab19fa99ae12ec313c532c4cbe07b059980aaa78d311bf5def85f61caf0c
SSDEEP 12288:Qdok5UugqXKWpiR1w25lLI5aOqnLkELmAc/HvJAdwDMJHFw/OR:QdmcXKWAAuI59qLPzw4Jll
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/476-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/476-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/476-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/476-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/476-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1704-20-0x0000000004AE0000-0x0000000004B80000-memory.dmp

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memory/2768-1-0x0000000004BF0000-0x0000000004C89000-memory.dmp

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memory/2768-4-0x0000000004C90000-0x0000000004DAB000-memory.dmp

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memory/2972-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2972-39-0x0000000000400000-0x0000000000537000-memory.dmp

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