djvu | 86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7

Analysis

max time kernel
145s
max time network
107s
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, 12:58

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General

Target
86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
Size 702KB
Sample240429-p7tshsbe31
SHA256 86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7
MD5 b48a2d45b7806e392ff89a1850557c12
SHA1 8781fd8282bca6c97b21cf46b3f2310526d6c628
SHA512 4c31c079bd720b5f68a8f8ad470241a563ef03311e4a76092f6768e58980a8998d65a125d4e8d0b6623bbe395733696826bb19042487b5cb5afc286e7ea03758
SSDEEP 12288:z3rTukFFHUUoRwMc+0nilTEhBVw0gc1sp1ZBWrzi:z3mkFFHUUIcN5fhg9BW
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/2096-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2096-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2096-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2096-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2140-4-0x0000000004A00000-0x0000000004B1B000-memory.dmp	family_djvu
behavioral2/memory/2096-12-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4704-30-0x0000000000400000-0x0000000000537000-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
4460	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-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bee1f626-4f12-44c9-9ba2-6b6502680b43\\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe\" --AutoStart"	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.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 2140 set thread context of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2992 set thread context of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.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
2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
4704	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
4704	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2140 wrote to memory of 2096	2140	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	81
PID 2096 wrote to memory of 4460	2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	82
PID 2096 wrote to memory of 4460	2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	82
PID 2096 wrote to memory of 4460	2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	82
PID 2096 wrote to memory of 2992	2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	83
PID 2096 wrote to memory of 2992	2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	83
PID 2096 wrote to memory of 2992	2096	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	83
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86
PID 2992 wrote to memory of 4704	2992	86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe	86

C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
"C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
  "C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2096
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\bee1f626-4f12-44c9-9ba2-6b6502680b43" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4460
- - C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
    "C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2992
  - - C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
      "C:\Users\Admin\AppData\Local\Temp\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4704

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

86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe

Path C:\Users\Admin\AppData\Local\bee1f626-4f12-44c9-9ba2-6b6502680b43\86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7.exe
Size 702KB
SHA256 86e4f4ca78574d4d9f27249f87d3018123aed7392e16d5792c434155cd5a41c7
MD5 b48a2d45b7806e392ff89a1850557c12
SHA1 8781fd8282bca6c97b21cf46b3f2310526d6c628
SHA512 4c31c079bd720b5f68a8f8ad470241a563ef03311e4a76092f6768e58980a8998d65a125d4e8d0b6623bbe395733696826bb19042487b5cb5afc286e7ea03758
SSDEEP 12288:z3rTukFFHUUoRwMc+0nilTEhBVw0gc1sp1ZBWrzi:z3mkFFHUUIcN5fhg9BW
MD5 SHA1 SHA512 SSDEEP

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memory/2096-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2096-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2096-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2096-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2096-12-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2140-1-0x00000000030F0000-0x0000000003185000-memory.dmp

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memory/2140-4-0x0000000004A00000-0x0000000004B1B000-memory.dmp

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memory/4704-15-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-16-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-18-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4704-30-0x0000000000400000-0x0000000000537000-memory.dmp

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