djvu | 81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e

General

Target

81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe
Size

805KB
MD5

61fd2043a4df80639438b2b71443adec
SHA1

ed00f19c461a7fb51d9b43274966ed3b022b7bc6
SHA256

81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e
SHA512

cdf07dcaffe0a1e8a98672cd259b5bb4198e1824e3a0f1583f7db49586f02ee07606e54f43dd091a4bde84dd857f60836cc781a46ea1be3c8bcd1aeb0a848676
SSDEEP

12288:6PBqP0zcEqf167PWHIwhZdugmbjeHY9YCvEAt4LQLj2mWLc3KUc8/Y:WY0zsMTWowhyCH29t4cj27KCe

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.mzqt
offline_id
64GZgS7xxeK837qu1w0KPUK0sweaDoAeJlv15vt1
payload_url
http://colisumy.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-sxZWJ43EKx Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0794JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/3884-2-0x0000000004420000-0x000000000453B000-memory.dmp	family_djvu
behavioral2/memory/3404-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3404-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3404-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3404-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3404-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4440-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4440-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4440-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Control Panel\International\Geo\Nation	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3460	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-1-5-21-1141987721-3945596982-3297311814-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bb17a96e-66a3-45ed-8475-ddff3fa6c200\\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe\" --AutoStart"	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.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
8	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3884 set thread context of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 1788 set thread context of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88

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
3332	4440	WerFault.exe	88

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe
3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3884 wrote to memory of 3404	3884	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	82
PID 3404 wrote to memory of 3460	3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	84
PID 3404 wrote to memory of 3460	3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	84
PID 3404 wrote to memory of 3460	3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	84
PID 3404 wrote to memory of 1788	3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	86
PID 3404 wrote to memory of 1788	3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	86
PID 3404 wrote to memory of 1788	3404	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	86
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88
PID 1788 wrote to memory of 4440	1788	81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe	88

C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe
"C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3884
- C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe
  "C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3404
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\bb17a96e-66a3-45ed-8475-ddff3fa6c200" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3460
- - C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe
    "C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1788
  - - C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe
      "C:\Users\Admin\AppData\Local\Temp\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:4440
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4440 -s 568
        5⤵
        Program crash
        
        PID:3332

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4440 -ip 4440
1⤵
PID:1016

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\bb17a96e-66a3-45ed-8475-ddff3fa6c200\81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e.exe

Filesize
805KB

MD5
61fd2043a4df80639438b2b71443adec

SHA1
ed00f19c461a7fb51d9b43274966ed3b022b7bc6

SHA256
81632d1aeb616f501b57730b4bbab042be100478d7ad8f40534838fbae26f23e

SHA512
cdf07dcaffe0a1e8a98672cd259b5bb4198e1824e3a0f1583f7db49586f02ee07606e54f43dd091a4bde84dd857f60836cc781a46ea1be3c8bcd1aeb0a848676

Download Submit
memory/1788-18-0x00000000042E0000-0x0000000004381000-memory.dmp

Filesize
644KB

Download
memory/3404-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3404-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3404-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3404-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3404-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3884-1-0x0000000004380000-0x000000000441C000-memory.dmp

Filesize
624KB

Download
memory/3884-2-0x0000000004420000-0x000000000453B000-memory.dmp

Filesize
1.1MB

Download
memory/4440-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4440-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4440-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads