djvu | 3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/05/2024, 09:14

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General

Target
3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
Size 727KB
Sample240520-k7amesch65
SHA256 3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91
MD5 244934b318cb1b3a72e999d0084ede75
SHA1 2d09e4dc0699d33699d87cff82d648988129b76a
SHA512 ed702e4ba4d1b6cf843fd3c771952a346e60e059ba0360e9a223969db0925bd64c2d5df8019b792fa278fa4254ef1c1f8b0963ee3ef30b0cb9a6d359f4eaf7ae
SSDEEP 12288:cfDdmkE8lYGhp4rIxGlzpD7yD8JMu1ksnAZyjGAjOgmAW7lhUIFq0:yVTY7vhvJMuCsVrjOTAW7Pq0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/2888-2-0x00000000021A0000-0x00000000022BB000-memory.dmp	family_djvu
behavioral2/memory/3356-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3356-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1344-39-0x0000000000400000-0x0000000000537000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2816	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-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\eb217daf-a985-416f-b241-f0c212265b20\\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe\" --AutoStart"	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.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
17	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2888 set thread context of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2148 set thread context of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90

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
3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
1344	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
1344	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 2888 wrote to memory of 3356	2888	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	83
PID 3356 wrote to memory of 2816	3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	86
PID 3356 wrote to memory of 2816	3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	86
PID 3356 wrote to memory of 2816	3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	86
PID 3356 wrote to memory of 2148	3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	88
PID 3356 wrote to memory of 2148	3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	88
PID 3356 wrote to memory of 2148	3356	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	88
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90
PID 2148 wrote to memory of 1344	2148	3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe	90

C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
"C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
  "C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3356
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\eb217daf-a985-416f-b241-f0c212265b20" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2816
- - C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
    "C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2148
  - - C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
      "C:\Users\Admin\AppData\Local\Temp\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1344

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 4805b33be79c1143a7370210d66c6b95613680e54105a897052b0f23c3197365
MD5 fe6bd6c298147e79a7f3d71cd37dc191
SHA1 d46b556357a38b15fb12aa6b05f49298d2327925
SHA512 632ea2e5d3ee49dbaa2b7a23fcc8e343d7832b5d5789e38a1e6846c177d76e09a975b974b00b07b74a1a4be6378c8dca79f2b1aa547f686d2d08acdaa4b9bcb1
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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 94ac92a309aa576ec67e0ffeae80a1a097fe093def1986e3ab435ae31f3f32d7
MD5 30cef12aa4bb620321c2fa28edf3ae65
SHA1 30f00d75ea7f5e65e575d0141cfec19f930c3b1c
SHA512 8c098c17bda9f00e2d9d1c0ec239bae7f6a348ea75fd1c6c2c93784f5097753d728cc9c933c1b527b112d285026032c20e2528b8bae387e7ca91dd8cd9baff4a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 a0f5a5b093ef93c7ce14e8555efeb8fea3421174807d5c1167f7a86b5ce8b8d9
MD5 575c6192ad93586d3c11ef6106443f07
SHA1 16baa6e08308d1f3db2e021e4d0a1d157bdb7fd6
SHA512 062caf7b2de13feb6e1b4372dd01c432da302bb71cf77eeec139864e38da12c924cebbd49908ce0007b2d41f00b1959e4b29604da13b94d4d83fe47cb604face
MD5 SHA1 SHA512

Submit Download

3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe

Path C:\Users\Admin\AppData\Local\eb217daf-a985-416f-b241-f0c212265b20\3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91.exe
Size 727KB
SHA256 3a1ce45b3ad5c3b6caf07da0e54be3c673aa10a23f7007b7f9d2e83da8b65d91
MD5 244934b318cb1b3a72e999d0084ede75
SHA1 2d09e4dc0699d33699d87cff82d648988129b76a
SHA512 ed702e4ba4d1b6cf843fd3c771952a346e60e059ba0360e9a223969db0925bd64c2d5df8019b792fa278fa4254ef1c1f8b0963ee3ef30b0cb9a6d359f4eaf7ae
SSDEEP 12288:cfDdmkE8lYGhp4rIxGlzpD7yD8JMu1ksnAZyjGAjOgmAW7lhUIFq0:yVTY7vhvJMuCsVrjOTAW7Pq0
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1344-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1344-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2148-22-0x0000000000400000-0x00000000004FF000-memory.dmp

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memory/2148-20-0x0000000000400000-0x00000000004FF000-memory.dmp

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memory/2888-2-0x00000000021A0000-0x00000000022BB000-memory.dmp

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memory/2888-1-0x0000000002100000-0x000000000219E000-memory.dmp

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memory/3356-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3356-17-0x0000000000400000-0x0000000000537000-memory.dmp

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