djvu | d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e

Analysis

max time kernel
143s
max time network
155s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
16/04/2024, 23:22

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General

Target
d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe
Size 769KB
Sample240416-3ct2pafd39
SHA256 d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e
MD5 140a3962f9646381631f1acddb4d62ef
SHA1 a6716c8092c74de65a5d575bab84a18180cb6a89
SHA512 9dc2befc05fa505f721cfc8e735e952b7592d1e80bb5af1280c33b058a84f94df1b1a9d636e1e50c1ada4c43265974719e5592d5dbef6321857e676efdede855
SSDEEP 24576:Qxxkrv2U5MO7I78EG7UzykyZRffMJkET16:QxWrv7mOFp2EnMJkET16
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.uazq
offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://sajdfue.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/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 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: 0860PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/2360-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp	family_djvu
behavioral2/memory/4880-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4880-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4880-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4880-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4880-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/748-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/748-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/748-25-0x0000000000400000-0x0000000000537000-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
4940	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-1-5-21-825860316-2493133627-3905166409-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0bc6dad0-cab8-4bb3-af10-0de3f49b44a6\\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe\" --AutoStart"	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.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
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2360 set thread context of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2684 set thread context of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3876	748	WerFault.exe	87

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe
4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 2360 wrote to memory of 4880	2360	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	82
PID 4880 wrote to memory of 4940	4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	83
PID 4880 wrote to memory of 4940	4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	83
PID 4880 wrote to memory of 4940	4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	83
PID 4880 wrote to memory of 2684	4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	84
PID 4880 wrote to memory of 2684	4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	84
PID 4880 wrote to memory of 2684	4880	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	84
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87
PID 2684 wrote to memory of 748	2684	d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe	87

C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe
"C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe
  "C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4880
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0bc6dad0-cab8-4bb3-af10-0de3f49b44a6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4940
- - C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe
    "C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2684
  - - C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe
      "C:\Users\Admin\AppData\Local\Temp\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:748
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 748 -s 600
        5⤵
        Program crash
        
        PID:3876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 748 -ip 748
1⤵
PID:4444

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

d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe

Path C:\Users\Admin\AppData\Local\0bc6dad0-cab8-4bb3-af10-0de3f49b44a6\d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e.exe
Size 769KB
SHA256 d8a119f2fda1dd072497822cb27651b97184232f4e942d1529ac181c3041118e
MD5 140a3962f9646381631f1acddb4d62ef
SHA1 a6716c8092c74de65a5d575bab84a18180cb6a89
SHA512 9dc2befc05fa505f721cfc8e735e952b7592d1e80bb5af1280c33b058a84f94df1b1a9d636e1e50c1ada4c43265974719e5592d5dbef6321857e676efdede855
SSDEEP 24576:Qxxkrv2U5MO7I78EG7UzykyZRffMJkET16:QxWrv7mOFp2EnMJkET16
MD5 SHA1 SHA512 SSDEEP

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memory/748-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/748-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/748-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-1-0x0000000003000000-0x00000000030A1000-memory.dmp

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memory/2360-2-0x0000000004BD0000-0x0000000004CEB000-memory.dmp

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memory/2684-20-0x0000000003030000-0x00000000030D2000-memory.dmp

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memory/4880-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4880-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4880-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4880-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4880-17-0x0000000000400000-0x0000000000537000-memory.dmp

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