djvu | 8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b

Analysis

max time kernel
144s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
30/04/2024, 23:45

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General

Target
8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
Size 779KB
Sample240430-3rxq5acf63
SHA256 8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b
MD5 4be532de37e53ff80c2438560e23e414
SHA1 9cdfdae68694d8fe448323194c56e63f495e893c
SHA512 1a902886327bb891da43cb5f572be358a61775f79a7e6cc5ccd6bbdf722d0653e46edb5bc8b4c2affb0dfb3e718e9b6d3fdf59f4bf91bad30ed569024ee1ffce
SSDEEP 12288:qALj62uZgxLFV0t6dGwO9qEkILlxrdIYbV1fHJ7TLlLbgDWA675mLLe2:qGuuxL0t6dpEfznV1v95buW8
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgzq
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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/3948-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3948-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3948-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1100-4-0x0000000003840000-0x000000000395B000-memory.dmp	family_djvu
behavioral2/memory/3948-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3948-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5076-14-0x0000000001DC0000-0x0000000001E5C000-memory.dmp	family_djvu
behavioral2/memory/5072-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5072-32-0x0000000000400000-0x0000000000537000-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
4844	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\\0477b559-0d36-4964-a76f-d7fd5d3c496e\\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe\" --AutoStart"	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.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
3	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1100 set thread context of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 5076 set thread context of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.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
3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
5072	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
5072	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 1100 wrote to memory of 3948	1100	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	80
PID 3948 wrote to memory of 4844	3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	82
PID 3948 wrote to memory of 4844	3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	82
PID 3948 wrote to memory of 4844	3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	82
PID 3948 wrote to memory of 5076	3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	83
PID 3948 wrote to memory of 5076	3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	83
PID 3948 wrote to memory of 5076	3948	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	83
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86
PID 5076 wrote to memory of 5072	5076	8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe	86

C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
"C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
  "C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3948
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0477b559-0d36-4964-a76f-d7fd5d3c496e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4844
- - C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
    "C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5076
  - - C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
      "C:\Users\Admin\AppData\Local\Temp\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:5072

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

8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe

Path C:\Users\Admin\AppData\Local\0477b559-0d36-4964-a76f-d7fd5d3c496e\8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b.exe
Size 779KB
SHA256 8e5bdd852e0e905da97e3fd2f2ca6a698b13ab083c1f240c3be30048f93bb78b
MD5 4be532de37e53ff80c2438560e23e414
SHA1 9cdfdae68694d8fe448323194c56e63f495e893c
SHA512 1a902886327bb891da43cb5f572be358a61775f79a7e6cc5ccd6bbdf722d0653e46edb5bc8b4c2affb0dfb3e718e9b6d3fdf59f4bf91bad30ed569024ee1ffce
SSDEEP 12288:qALj62uZgxLFV0t6dGwO9qEkILlxrdIYbV1fHJ7TLlLbgDWA675mLLe2:qGuuxL0t6dpEfznV1v95buW8
MD5 SHA1 SHA512 SSDEEP

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memory/1100-1-0x0000000001C80000-0x0000000001D1E000-memory.dmp

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memory/1100-4-0x0000000003840000-0x000000000395B000-memory.dmp

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memory/3948-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3948-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3948-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3948-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3948-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-26-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5072-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5076-14-0x0000000001DC0000-0x0000000001E5C000-memory.dmp

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