djvu | 3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4

Analysis

max time kernel
145s
max time network
106s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
29/04/2024, 15:41

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General

Target
3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
Size 702KB
Sample240429-s48daaee6y
SHA256 3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4
MD5 4ce008967b542d8d39ef9803e7053865
SHA1 852fd2a10137dae602404dcdc892008ce4229383
SHA512 43ea2d647968ce41e50467d00da30491fafb4cc18196032f9fa16ceb3541b0072fc9bd38f5ed53469f9767b546a4db68a63dd1157f9dc073bd558d7d318b9711
SSDEEP 12288:uz4b6J/lczQK5R9GEcZFNHLrBWZC7ZbGMzSAhnQrpM8gFGFXM3twhWNH94TeNpvQ:uzs6J/4N6NJWe0ySrrpMhFEd89cyA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4020-2-0x0000000004950000-0x0000000004A6B000-memory.dmp	family_djvu
behavioral2/memory/4804-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4804-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4804-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4804-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4804-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1952-31-0x0000000000400000-0x0000000000537000-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
1100	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-1-5-21-2878097196-921257239-309638238-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cc43f47f-340d-43b5-942c-722a2dce2de2\\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe\" --AutoStart"	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4020 set thread context of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 388 set thread context of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85

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
4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
1952	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
1952	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4020 wrote to memory of 4804	4020	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	80
PID 4804 wrote to memory of 1100	4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	81
PID 4804 wrote to memory of 1100	4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	81
PID 4804 wrote to memory of 1100	4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	81
PID 4804 wrote to memory of 388	4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	82
PID 4804 wrote to memory of 388	4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	82
PID 4804 wrote to memory of 388	4804	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	82
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85
PID 388 wrote to memory of 1952	388	3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe	85

C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
"C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4020
- C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
  "C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4804
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\cc43f47f-340d-43b5-942c-722a2dce2de2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1100
- - C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
    "C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:388
  - - C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
      "C:\Users\Admin\AppData\Local\Temp\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1952

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

3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe

Path C:\Users\Admin\AppData\Local\cc43f47f-340d-43b5-942c-722a2dce2de2\3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4.exe
Size 702KB
SHA256 3730ee1dd8c0678fa27db9be6d6d50c6289d4237480ce8d3bc648aaa15151ac4
MD5 4ce008967b542d8d39ef9803e7053865
SHA1 852fd2a10137dae602404dcdc892008ce4229383
SHA512 43ea2d647968ce41e50467d00da30491fafb4cc18196032f9fa16ceb3541b0072fc9bd38f5ed53469f9767b546a4db68a63dd1157f9dc073bd558d7d318b9711
SSDEEP 12288:uz4b6J/lczQK5R9GEcZFNHLrBWZC7ZbGMzSAhnQrpM8gFGFXM3twhWNH94TeNpvQ:uzs6J/4N6NJWe0ySrrpMhFEd89cyA
MD5 SHA1 SHA512 SSDEEP

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memory/1952-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1952-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4020-1-0x0000000004870000-0x000000000490F000-memory.dmp

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memory/4020-2-0x0000000004950000-0x0000000004A6B000-memory.dmp

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memory/4804-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4804-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4804-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4804-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4804-4-0x0000000000400000-0x0000000000537000-memory.dmp

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