djvu | 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23/05/2024, 04:04

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General

Target
519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
Size 711KB
Sample240523-enfrfadd88
SHA256 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d
MD5 07116bba4c9f651cf2c4327698483aa0
SHA1 02a9fc8459c6ad451ba571146d5211664b4276d3
SHA512 d825dc67fbf663e6f193200aed834da7aa46396cd13b48f3c47298e984347730df7a99e48dd6b6e4b06805004ced2a2a761d626b1ebeb88e9607062e0f493ae2
SSDEEP 12288:o4Amb9t3hc0lMxKvp30GfaOztaHNdvPRROnLTfp1WPhbFXMNZMCHcBiFBcDW7X:o49bLLgQ50GfaOzCnvPRWLV8PRFXMPHj
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/4356-2-0x00000000049D0000-0x0000000004AEB000-memory.dmp	family_djvu
behavioral2/memory/1352-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1352-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1352-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1352-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1352-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2344-35-0x0000000000400000-0x0000000000537000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2784	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-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2d168c45-3840-470e-b09b-4f0eeea1629f\\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe\" --AutoStart"	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.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
5	api.2ip.ua
6	api.2ip.ua
13	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4356 set thread context of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 3068 set thread context of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89

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
1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
2344	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
2344	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 4356 wrote to memory of 1352	4356	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	82
PID 1352 wrote to memory of 2784	1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	86
PID 1352 wrote to memory of 2784	1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	86
PID 1352 wrote to memory of 2784	1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	86
PID 1352 wrote to memory of 3068	1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	87
PID 1352 wrote to memory of 3068	1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	87
PID 1352 wrote to memory of 3068	1352	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	87
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89
PID 3068 wrote to memory of 2344	3068	519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe	89

C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
"C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4356
- C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
  "C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1352
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2d168c45-3840-470e-b09b-4f0eeea1629f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2784
- - C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
    "C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3068
  - - C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
      "C:\Users\Admin\AppData\Local\Temp\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2344

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 4737de49245ace1ca1fdeaacd5feee9bbda88bc6f42c84a1ea7d316383792cf8
MD5 7575c39a544943a68ce6e709c586005a
SHA1 4874b30bd1d455b28a95c4e21c5aecd1ea043d7a
SHA512 abf3d85393725113e720cbe8980b369236511e3984e8cbfa795f19bb5d6e39822e80a835caeb498581797a74b349765ba1a27f26586a17a66ae1c88bd066a3d1
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 961d09bbb40e45c2f149198c240a68a88124a71eb844ab1c5c67c9697fb81ae9
MD5 65ae68a6680c8ed5e8a0438661ebd79d
SHA1 55bd6f67b205c85b4d592d16399c29f369c59a0f
SHA512 bb622a98e9d030485fa746a6347617ec5fbc89fe7307c90b6283c01c44deaedf0b5ce371c6e713ece746663bbe9a1337ba551c3b0e41f5c6fa65cfaa215b0a42
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 295931e0af145bfd280e141b1087d7d336fa1965a45dfb27b10f90a70eb16e95
MD5 7be0aaf02b4c4a63f089d0218ab2457b
SHA1 34e400a2f665ea401c7fbc35e008596ea1976c6c
SHA512 1e834c2accb4dc25ea26d665721c8f2b4d8eff6232f80f8ceb514b43082e8633d394a5748f9f5dafdc55d1534ab9a3fb495235dd151c35aecbd03b2f51911975
MD5 SHA1 SHA512

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519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe

Path C:\Users\Admin\AppData\Local\2d168c45-3840-470e-b09b-4f0eeea1629f\519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d.exe
Size 711KB
SHA256 519411833bee98ae20a5e99db24abb89266ec25471673b6d32d6cebce49a9d6d
MD5 07116bba4c9f651cf2c4327698483aa0
SHA1 02a9fc8459c6ad451ba571146d5211664b4276d3
SHA512 d825dc67fbf663e6f193200aed834da7aa46396cd13b48f3c47298e984347730df7a99e48dd6b6e4b06805004ced2a2a761d626b1ebeb88e9607062e0f493ae2
SSDEEP 12288:o4Amb9t3hc0lMxKvp30GfaOztaHNdvPRROnLTfp1WPhbFXMNZMCHcBiFBcDW7X:o49bLLgQ50GfaOzCnvPRWLV8PRFXMPHj
MD5 SHA1 SHA512 SSDEEP

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memory/1352-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1352-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1352-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1352-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1352-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2344-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4356-1-0x0000000004930000-0x00000000049C6000-memory.dmp

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memory/4356-2-0x00000000049D0000-0x0000000004AEB000-memory.dmp

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