djvu | 3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11

Resubmissions

27/04/2024, 15:46

240427-s7xe7acf9210

27/04/2024, 13:45

240427-q2stpscc4y10

Analysis

max time kernel
145s
max time network
96s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
27/04/2024, 13:45

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General

Target
3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
Size 742KB
Sample240427-q2stpscc4y
SHA256 3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11
MD5 51b68df562c85b71f43593a2356f48cc
SHA1 e28a8c17d55bb863692b3ce7e0447cb2fdca5331
SHA512 828a75f27f62d512ec67a6a9279c78f07656d77303f4346bc23332f4b79b0f2dc21991e49b8b959728892fe3534a8f91bea873585880c55fcdab42c1fce09dfc
SSDEEP 12288:KgXKO7eyPhFEXBVgRllwcH5431gItYJpe9x/4HsccRz:5XKO7LFO3gSgYNYHOxVL1
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 16 IoCs

resource	yara_rule
behavioral2/memory/3128-2-0x00000000049C0000-0x0000000004ADB000-memory.dmp	family_djvu
behavioral2/memory/1660-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1660-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2404-30-0x0000000000400000-0x0000000000537000-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
3044	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-1-5-21-1856190483-1022094809-400023910-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6258abd1-07ab-4e44-aad2-a75f0c0bde38\\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe\" --AutoStart"	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.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 3128 set thread context of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 2776 set thread context of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.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
1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
2404	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
2404	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 3128 wrote to memory of 1660	3128	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	80
PID 1660 wrote to memory of 3044	1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	81
PID 1660 wrote to memory of 3044	1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	81
PID 1660 wrote to memory of 3044	1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	81
PID 1660 wrote to memory of 2776	1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	82
PID 1660 wrote to memory of 2776	1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	82
PID 1660 wrote to memory of 2776	1660	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	82
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85
PID 2776 wrote to memory of 2404	2776	3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe	85

C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
"C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3128
- C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
  "C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1660
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\6258abd1-07ab-4e44-aad2-a75f0c0bde38" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3044
- - C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
    "C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2776
  - - C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
      "C:\Users\Admin\AppData\Local\Temp\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2404

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

3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe

Path C:\Users\Admin\AppData\Local\6258abd1-07ab-4e44-aad2-a75f0c0bde38\3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11.exe
Size 742KB
SHA256 3aac2fe0353cd598845a6797d06aa567376029781564b2d119754d4c2b300f11
MD5 51b68df562c85b71f43593a2356f48cc
SHA1 e28a8c17d55bb863692b3ce7e0447cb2fdca5331
SHA512 828a75f27f62d512ec67a6a9279c78f07656d77303f4346bc23332f4b79b0f2dc21991e49b8b959728892fe3534a8f91bea873585880c55fcdab42c1fce09dfc
SSDEEP 12288:KgXKO7eyPhFEXBVgRllwcH5431gItYJpe9x/4HsccRz:5XKO7LFO3gSgYNYHOxVL1
MD5 SHA1 SHA512 SSDEEP

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memory/1660-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1660-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2404-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3128-2-0x00000000049C0000-0x0000000004ADB000-memory.dmp

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memory/3128-1-0x0000000003180000-0x000000000321A000-memory.dmp

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