djvu | b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8

General

Target

b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
Size

677KB
MD5

29c90df93010a44329059fe0300d92da
SHA1

2b5da6fe0256f1f27e86d955b4c53177e91d85dd
SHA256

b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8
SHA512

a1866d160ac263c8d4a9380469a4cb0ecf6d86621c6cfef43b1eade133be3bf9e5fb0d67f63f13af72faca11af52cf06ec464378fed7c444b5553d00950bf128
SSDEEP

12288:oaTA97Ia6XHj9DF5nX7p/+haG3S/jktz0H1PiqvYWfXdQSD+YbaUcDrh:rcx+XHj5brpm0G3QjwIpi+YWfXdZK8b

Score

10^/10

djvu vidar discovery persistence ransomware stealer

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.cdqw
offline_id
mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
payload_url
http://brusuax.com/dl/build2.exe

http://zexeq.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. You can get and look video overview decrypt tool: https://we.tl/t-99MNqXMrdS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0840ASdw

rsa_pubkey.plain

Signatures

Detect Vidar Stealer 5 IoCs

stealer

resource	yara_rule
behavioral2/memory/2592-55-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/2592-56-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/4752-52-0x00000000009D0000-0x00000000009FA000-memory.dmp	family_vidar_v6
behavioral2/memory/2592-50-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6
behavioral2/memory/2592-61-0x0000000000400000-0x000000000063D000-memory.dmp	family_vidar_v6

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/816-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/816-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/816-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/816-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3476-2-0x0000000002730000-0x000000000284B000-memory.dmp	family_djvu
behavioral2/memory/816-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4320-81-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3180	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-1-5-21-3934047325-4097474570-3437169968-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\a28ae3eb-025e-4b9e-ac18-035b3fc05e3f\\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe\" --AutoStart"	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
1	api.2ip.ua
4	api.2ip.ua
12	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3476 set thread context of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 2420 set thread context of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78

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
3888	2592	WerFault.exe	80

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 3476 wrote to memory of 816	3476	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	74
PID 816 wrote to memory of 3180	816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	77
PID 816 wrote to memory of 3180	816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	77
PID 816 wrote to memory of 3180	816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	77
PID 816 wrote to memory of 2420	816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	76
PID 816 wrote to memory of 2420	816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	76
PID 816 wrote to memory of 2420	816	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	76
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78
PID 2420 wrote to memory of 4320	2420	b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe	78

C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
"C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3476
- C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
  "C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:816
- - C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
    "C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2420
  - - C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe
      "C:\Users\Admin\AppData\Local\Temp\b70087d7f98d1202412bef14f85685697fe14b29a6c0e91da315c6bcc6b253d8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:4320
    - - C:\Users\Admin\AppData\Local\104aab89-6afe-4f7a-b607-f063804d6ec2\build2.exe
        
        "C:\Users\Admin\AppData\Local\104aab89-6afe-4f7a-b607-f063804d6ec2\build2.exe"
        5⤵
        
        PID:4752
      - C:\Users\Admin\AppData\Local\104aab89-6afe-4f7a-b607-f063804d6ec2\build2.exe
        
        "C:\Users\Admin\AppData\Local\104aab89-6afe-4f7a-b607-f063804d6ec2\build2.exe"
        6⤵
        
        PID:2592
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2592 -s 1892
        7⤵
        Program crash
        
        PID:3888
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\a28ae3eb-025e-4b9e-ac18-035b3fc05e3f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3180

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/816-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/816-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/816-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/816-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/816-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2420-22-0x00000000023B0000-0x000000000244D000-memory.dmp

Filesize
628KB

Download
memory/2592-55-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/2592-61-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/2592-50-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/2592-56-0x0000000000400000-0x000000000063D000-memory.dmp

Filesize
2.2MB

Download
memory/3476-1-0x0000000000AA0000-0x0000000000B3A000-memory.dmp

Filesize
616KB

Download
memory/3476-2-0x0000000002730000-0x000000000284B000-memory.dmp

Filesize
1.1MB

Download
memory/4320-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4320-81-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4752-51-0x0000000000C00000-0x0000000000D00000-memory.dmp

Filesize
1024KB

Download
memory/4752-52-0x00000000009D0000-0x00000000009FA000-memory.dmp

Filesize
168KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads