djvu | c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515

Analysis

max time kernel
143s
max time network
122s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
19/05/2024, 16:49

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General

Target
c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
Size 707KB
Sample240519-vbwj5agb43
SHA256 c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515
MD5 b20c8fddde9f866496defe51137e943c
SHA1 3e2a3719e93830da17260f2bf253a9d1c934c324
SHA512 91453d07b43d8eb4e3fbbd5b69b91f92f0e2a34c2cd2e795c0bbd6b6db44ef1be0b96d341e9135fdd7071aa6316cfe33b9f202cfc8c5edaa3f380ca133cc6f5b
SSDEEP 12288:lAYUstyPJki/DERQduUBANF+7188DoxxO902+qRFasUcO6t/6mdM/xd:lAYjtCoRQ8+us7hyxU0oRFadY6mdM/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

resource	yara_rule
behavioral2/memory/2604-2-0x00000000042E0000-0x00000000043FB000-memory.dmp	family_djvu
behavioral2/memory/4476-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4476-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1796-37-0x0000000000400000-0x0000000000537000-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
1232	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-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\060919b7-9cbc-49ba-8776-0c5a097a36c2\\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe\" --AutoStart"	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.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
2	api.2ip.ua
7	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2604 set thread context of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 1536 set thread context of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
1796	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
1796	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 2604 wrote to memory of 4476	2604	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	79
PID 4476 wrote to memory of 1232	4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	81
PID 4476 wrote to memory of 1232	4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	81
PID 4476 wrote to memory of 1232	4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	81
PID 4476 wrote to memory of 1536	4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	82
PID 4476 wrote to memory of 1536	4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	82
PID 4476 wrote to memory of 1536	4476	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	82
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85
PID 1536 wrote to memory of 1796	1536	c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe	85

C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
"C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
  "C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4476
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\060919b7-9cbc-49ba-8776-0c5a097a36c2" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1232
- - C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
    "C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1536
  - - C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
      "C:\Users\Admin\AppData\Local\Temp\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1796

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

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 40ec781deaf75d8b007cf9e13808ffa42d8c0504d04dca6ceb6694cf695f9205
MD5 150971b6640164644e95660762b80578
SHA1 0f17a1e9deddcbbbe51b53f6f71fb5ecb27adbdc
SHA512 b864b2637566999015a2383a2930ea490e4efaf2ba1833a9ec97d88177d32f3d9b8370cfbd3e81b9903031c36ea350482ae5dd0e2119c6408c49c31053b0423d
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 96c5cee8ff5fcdab6887337b61378e90d4595580d1e2dc47b48f12430a6f14b6
MD5 ee0bc05f6b8b096ee1f1ad32d00902f6
SHA1 19b8fb0fe8b70ffd156395e9dbdf945bf339b550
SHA512 d75db8e5388d8c016d17a6f383827016f1398f7f11246c0b641511e0deaab25e6f461421e49ec4b691ff7b627d5662da1860096864a8b2d23f0edaf5818bf44b
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 78c7d0b3eddd0fc5375f4e9399c81e79fcb6d16413ac7d8a34544d8ca6c9f5ff
MD5 751646f0370e241e292fc7afa6bca3c4
SHA1 c9572f66114d90ca9ad724dcde70076c3c11527b
SHA512 f0968885cdb949c71cd82c045e7291431d6f6fa5f5cf093b709661e345a4d40266ba5d6a76a2479d694fdbf8cf24063220c5153d1bc120960a3f808fbfd7245d
MD5 SHA1 SHA512

Submit Download

c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe

Path C:\Users\Admin\AppData\Local\060919b7-9cbc-49ba-8776-0c5a097a36c2\c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515.exe
Size 707KB
SHA256 c9bb75bf4403ff84b740517685389232f370cdf329a1acfa3b5adc161687c515
MD5 b20c8fddde9f866496defe51137e943c
SHA1 3e2a3719e93830da17260f2bf253a9d1c934c324
SHA512 91453d07b43d8eb4e3fbbd5b69b91f92f0e2a34c2cd2e795c0bbd6b6db44ef1be0b96d341e9135fdd7071aa6316cfe33b9f202cfc8c5edaa3f380ca133cc6f5b
SSDEEP 12288:lAYUstyPJki/DERQduUBANF+7188DoxxO902+qRFasUcO6t/6mdM/xd:lAYjtCoRQ8+us7hyxU0oRFadY6mdM/
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1796-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1796-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2604-1-0x00000000040F0000-0x000000000418B000-memory.dmp

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memory/2604-2-0x00000000042E0000-0x00000000043FB000-memory.dmp

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memory/4476-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4476-19-0x0000000000400000-0x0000000000537000-memory.dmp

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