djvu | 85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78

Analysis

max time kernel
148s
max time network
150s
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, 09:56

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General

Target
85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
Size 846KB
Sample240417-lyv3fabd96
SHA256 85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78
MD5 eea74ee8aef86ca6c2c924603c8259b5
SHA1 3c1f61d4a85c96bf61f5983c2454567e508819ea
SHA512 c1f5aa060fa39c7ad4cf9152d7aa1835b2aeb45ca96b030e46d7f9d00e3f197ab47f7df9ed15857f6331024df4dbef15efad6315b751501f514e857bb239185e
SSDEEP 12288:5Ch31G/1XG1C6U+XO4tPkNdP+B2biHC3YbIr5NAWW5KKVUQjwGcfutaSE:bXGVU+XDxknP+B2biHC0sNVWNsGfUSE
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.uazq
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: 0860PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/900-2-0x0000000004B60000-0x0000000004C7B000-memory.dmp	family_djvu
behavioral2/memory/1640-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1640-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1640-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1640-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1640-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/388-37-0x0000000000400000-0x0000000000537000-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
3664	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-1-5-21-3777591257-2471171023-3629228286-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e8416c5b-4feb-4f40-aa79-bfaa391c684f\\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe\" --AutoStart"	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.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
16	api.2ip.ua
8	api.2ip.ua
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 900 set thread context of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 412 set thread context of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.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
1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
388	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
388	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 900 wrote to memory of 1640	900	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	81
PID 1640 wrote to memory of 3664	1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	82
PID 1640 wrote to memory of 3664	1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	82
PID 1640 wrote to memory of 3664	1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	82
PID 1640 wrote to memory of 412	1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	83
PID 1640 wrote to memory of 412	1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	83
PID 1640 wrote to memory of 412	1640	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	83
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86
PID 412 wrote to memory of 388	412	85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe	86

C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
"C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:900
- C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
  "C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1640
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e8416c5b-4feb-4f40-aa79-bfaa391c684f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3664
- - C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
    "C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:412
  - - C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
      "C:\Users\Admin\AppData\Local\Temp\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:388

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

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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 2e6cb0e7466e95ba8b1dec549f90a8b55bf31556b1625083e8a85b2ad61dd629
MD5 821527cab93f4a709262bd300cde1077
SHA1 75e41622b69413990d5a5ada659d0cea1b478904
SHA512 e007f5b7d7373d1b9b8b566ed252741e27cd6d8e225fccb70f699e188da93443cfa6035af1b4a8d0dffeb6b31041cb287c5d86db9c01127c2864eaf25e2ce149
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 41867e090daf2634528a6212340baeae84f7ab61080f5ff1f1b356808ed01b54
MD5 840bbb5e2fcd9be8c1f6821c97986fb5
SHA1 c1a448a95ecf14c6e4a3a6177095073251d0e3d5
SHA512 a3a1dffff039448bf46c02c6e094e932c172e229466800b7be14690f4cad94a521e5becfc2eab50962490e160c723a21a8a90849d5c1fdb41ad92e3bab458e76
MD5 SHA1 SHA512

Submit Download

85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe

Path C:\Users\Admin\AppData\Local\e8416c5b-4feb-4f40-aa79-bfaa391c684f\85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78.exe
Size 846KB
SHA256 85a5378842649fa0fb7abe7314a354efcfea6a94f515164117f585f038ee8f78
MD5 eea74ee8aef86ca6c2c924603c8259b5
SHA1 3c1f61d4a85c96bf61f5983c2454567e508819ea
SHA512 c1f5aa060fa39c7ad4cf9152d7aa1835b2aeb45ca96b030e46d7f9d00e3f197ab47f7df9ed15857f6331024df4dbef15efad6315b751501f514e857bb239185e
SSDEEP 12288:5Ch31G/1XG1C6U+XO4tPkNdP+B2biHC3YbIr5NAWW5KKVUQjwGcfutaSE:bXGVU+XDxknP+B2biHC0sNVWNsGfUSE
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/388-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/388-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/412-18-0x0000000004AC0000-0x0000000004B53000-memory.dmp

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memory/900-2-0x0000000004B60000-0x0000000004C7B000-memory.dmp

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memory/900-1-0x0000000004AC0000-0x0000000004B5C000-memory.dmp

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memory/1640-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1640-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1640-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1640-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1640-15-0x0000000000400000-0x0000000000537000-memory.dmp

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