djvu | 831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6

General

Target

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
Size

771KB
MD5

f0618ae3a8e0f57cb2608904990621da
SHA1

b90e891d3f0c61ea1b875cd141bd3ec427f9f4f2
SHA256

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6
SHA512

4f9949c1ed09dc10ea743b0c7878bd88b3cc872176d28ecea6b44e9b5b94676eac4954d90cc138350bb1659a0de00e7145b6794d9eec196e7e6dc0b0145b7d11
SSDEEP

12288:x3IXMKvrkQyyY82SuQQT2G+4EavNzu9i0oX15RMyjoRjW/TTfGpGaGAiG:1QrkQyK22QT2gs0MycRjQ/fGpnZ

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Processes:

resource	yara_rule
behavioral2/memory/4796-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp	family_djvu
behavioral2/memory/252-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/252-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/252-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/252-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/252-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2860-39-0x0000000000400000-0x0000000000537000-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

Processes:

icacls.exe

pid process

5040 icacls.exe

pid	process
5040	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3394b8c0-5e73-43d8-b819-2bc0c4969987\\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe\" --AutoStart"	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.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.

Processes:

flow ioc

1 api.2ip.ua
2 api.2ip.ua
8 api.2ip.ua

flow	ioc
1	api.2ip.ua
2	api.2ip.ua
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

description	pid	process	target process
PID 4796 set thread context of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 set thread context of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

pid	process
252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
2860	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
2860	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
"C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
  "C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:252
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\3394b8c0-5e73-43d8-b819-2bc0c4969987" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5040
- - C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
    "C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4484
  - - C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
      "C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2860

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

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
cb9e9c73d3688b51ee1899e25cd1cc7e

SHA1
b2d472d87ac099a708b7536b5c30e5e6f0d28b7e

SHA256
382e6d80f80afb665a9c3065602a8fb4a6c3ff73c06a0a6937ffc178466d97a2

SHA512
74f1d7c3c68c0ae4ebc7b1c270c2138f578b78b591d8c6af4b7bb56fd4f23e5cebdf9748e7045521c72c000e5a4f35adce8e62951470e65c531f95b26b52a54e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
912cd1188de1979ab9b114ad05e329b7

SHA1
ecf03834d7828c6db3e07734326bac59065ba46a

SHA256
c41eed7f454fbe09ed2efb06b51a9ccc6aedc5c7bcdbe126eee4d261b923eda1

SHA512
53d9628c276e96e372127a063090b6a41dbd01fba694b07611541d9fccb5537c682f93e5ecc37155ac5e510f9ee7ee66f572ebed8b5aa415947a8a26ddcd1dc3

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
38dbfb1fad5f754a8eada48bc442d8b8

SHA1
22bad702cd10887d5d07f803ab5ec85183c933ab

SHA256
9c9b754d231720675062f65c6c536c53d6e6708d74b64d0a4c99d6a434cb6a9a

SHA512
d3a58ec63eb34d27cb88da7f3f5b88790c5f7380a6a5549e5a6f9f79e6d0782efd8fb9ad69ea442191eebf92aa5b583c0b84792ec5bfc54b8df0ac723d5425fa

Download Submit
C:\Users\Admin\AppData\Local\3394b8c0-5e73-43d8-b819-2bc0c4969987\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Filesize
771KB

MD5
f0618ae3a8e0f57cb2608904990621da

SHA1
b90e891d3f0c61ea1b875cd141bd3ec427f9f4f2

SHA256
831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6

SHA512
4f9949c1ed09dc10ea743b0c7878bd88b3cc872176d28ecea6b44e9b5b94676eac4954d90cc138350bb1659a0de00e7145b6794d9eec196e7e6dc0b0145b7d11

Download Submit
memory/252-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/252-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/252-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/252-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/252-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2860-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4484-20-0x0000000003240000-0x00000000032DD000-memory.dmp

Filesize
628KB

Download
memory/4796-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp

Filesize
1.1MB

Download
memory/4796-1-0x0000000003240000-0x00000000032E2000-memory.dmp

Filesize
648KB

Download

description	pid	process	target process
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4796 wrote to memory of 252	4796	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 252 wrote to memory of 5040	252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	icacls.exe
PID 252 wrote to memory of 5040	252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	icacls.exe
PID 252 wrote to memory of 5040	252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	icacls.exe
PID 252 wrote to memory of 4484	252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 252 wrote to memory of 4484	252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 252 wrote to memory of 4484	252	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4484 wrote to memory of 2860	4484	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads