djvu | 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4

General

Target

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
Size

733KB
MD5

73b4377ba5da0cff19465f5cc5491388
SHA1

9af973b66c4b92019e489500b6f0764045c79f62
SHA256

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4
SHA512

6e3c5f1b81e3c1095183bfd4208323b4db711920943da4f81c113f52ec2051dc64e492ff6cf77a413f1e005a2b5dddffb2c7053adc4bffe57552649d404f0cb2
SSDEEP

12288:tPA8bo0x6NTfQ5fc39l++XeQho/Z+n5PMkFZ3QaPkiTj:tPifNwk37VroEfZL

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4748-3-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral2/memory/240-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/240-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1688-41-0x0000000000400000-0x0000000000537000-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

1620 icacls.exe

pid	process
1620	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3d00ac0a-3d56-4630-855e-739ecf5101ad\\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe\" --AutoStart"	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.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:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

description	pid	process	target process
PID 4748 set thread context of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 set thread context of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.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:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

pid	process
240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
1688	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
1688	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
"C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4748
- C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
  "C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:240
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\3d00ac0a-3d56-4630-855e-739ecf5101ad" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1620
- - C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
    "C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3684
  - - C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
      "C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1688

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
ad097f8a8502cc72518724d2b31426ec

SHA1
4fe49565580149ed2638f29a8cb4f19ef9513a56

SHA256
33a6fcd25004cbccf304f74a38be16f8cd00840ae4b70bca52d2cc68e14cc486

SHA512
2606d0e4798cd79a7a02c49574cc12f0166284923c4f6adb26aeab544a297c4b34fe253452b3fa76c15a1da670f3fe63988fe77e03ff1cd8e8063d37570aefc2

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
247cc78c939867d351fac9997cc95f1d

SHA1
2a751c22647bae670777b2da038dac242de65b2d

SHA256
85ceb4b39b60278483c991a01524bb09e663019c517e92120f8bf09d77332e8d

SHA512
dea0280bd6ef1fd9875f93acc0d06f9d17918ef78d18d29b1210abc110d0819693c3e25bfd25e3e1899cd2837e38bc9fbd70a8bfc19f8efe380db8c57a6c6d84

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

Filesize
392B

MD5
128e335ee7dcf5e52161510d0095ac5c

SHA1
740ed5168d6e159e36522a6f064c1789befde92f

SHA256
f0f46c9fb256d079956d8fc3dbaeb34bbb06d8d31bd9ea4f9af80ae5ef6665af

SHA512
44ccb831690fa385adff696c24f9f9eccdf23542626d153a15b84fde689a09fb20da570260ea8c3091d15a2eabe4d157b8848f789b986b4f93ca85f53111e3b4

Download Submit
C:\Users\Admin\AppData\Local\3d00ac0a-3d56-4630-855e-739ecf5101ad\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Filesize
733KB

MD5
73b4377ba5da0cff19465f5cc5491388

SHA1
9af973b66c4b92019e489500b6f0764045c79f62

SHA256
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4

SHA512
6e3c5f1b81e3c1095183bfd4208323b4db711920943da4f81c113f52ec2051dc64e492ff6cf77a413f1e005a2b5dddffb2c7053adc4bffe57552649d404f0cb2

Download Submit
memory/240-2-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/240-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/240-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/240-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/240-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1688-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4748-3-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

Filesize
1.1MB

Download
memory/4748-1-0x0000000004A20000-0x0000000004ABC000-memory.dmp

Filesize
624KB

Download

description	pid	process	target process
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4748 wrote to memory of 240	4748	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 240 wrote to memory of 1620	240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	icacls.exe
PID 240 wrote to memory of 1620	240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	icacls.exe
PID 240 wrote to memory of 1620	240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	icacls.exe
PID 240 wrote to memory of 3684	240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 240 wrote to memory of 3684	240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 240 wrote to memory of 3684	240	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 3684 wrote to memory of 1688	3684	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads