djvu | 61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
30/04/2024, 17:01

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General

Target
61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
Size 763KB
Sample240430-vjld5adb32
SHA256 61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55
MD5 ec08899e9c4e22a4ac745fab0207a302
SHA1 fb1d3fff916c6caaf4b7f82b29863266508e2084
SHA512 2e257668149547d0d118bf5c09952c5d4a5c15a6887cdf9405120bded12a99564b75ed551d3878898aca356534347dbf5da111db6228444ab47f37b515f4054c
SSDEEP 12288:NwWicSLbhks/EuhaIVFGbTGfHyBjF4Vhm2NOjvBiXygQIMnbWAX+:XSL9kYFaIVFG/GfHy9F4HOjPgCbWo
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgjs
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: 0863PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/3912-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3912-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4832-4-0x00000000036F0000-0x000000000380B000-memory.dmp	family_djvu
behavioral2/memory/3912-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3912-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3912-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2056-21-0x0000000001D80000-0x0000000001E21000-memory.dmp	family_djvu
behavioral2/memory/2712-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2712-40-0x0000000000400000-0x0000000000537000-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
5044	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\\6276f3c6-3901-4ae0-9398-54d73e959e3d\\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe\" --AutoStart"	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.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 4832 set thread context of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 2056 set thread context of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86

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
3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
2712	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
2712	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 4832 wrote to memory of 3912	4832	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	80
PID 3912 wrote to memory of 5044	3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	82
PID 3912 wrote to memory of 5044	3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	82
PID 3912 wrote to memory of 5044	3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	82
PID 3912 wrote to memory of 2056	3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	83
PID 3912 wrote to memory of 2056	3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	83
PID 3912 wrote to memory of 2056	3912	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	83
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86
PID 2056 wrote to memory of 2712	2056	61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe	86

C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
"C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4832
- C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
  "C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3912
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\6276f3c6-3901-4ae0-9398-54d73e959e3d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:5044
- - C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
    "C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2056
  - - C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
      "C:\Users\Admin\AppData\Local\Temp\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2712

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 cdede115b447b845285b6436b9aa5e561a9711c30cf89d2be2a78a4e0dc88af7
MD5 422a081e58bf330679ef48dc46d7a1d5
SHA1 2636af2dca0b8da050cceb3302ca6c76fb322ecd
SHA512 77354ea7d10f2a96d715e2f8450ca2e8322d2af29a0fb4b178e5dc3c90a20c7bb8651fb36aa83ab33616505d71c3175988d1ba959024a9e035270d2d5823ab35
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 6d908c6c33b1f8bac479be35df6c389fff4c37b4546e5e6dc7d39bc018c1671c
MD5 2173a9c979a4b552f33e0ce53a2ab907
SHA1 e107603c4be9c2fda1da13f1f418b3fd02f50810
SHA512 69a351407751ff93e174f183e2f2a5e5dba0f92337e7d064df29cb4e83b029d8f9d22fd60b8ad375e4c9ce7ef2fc3543a0bfb6719f19b2bac98b131a2b5b6aa0
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 2c649cce90159f20e0672f0c17fb460f4b42a01104ffc853703c312c7cb6b467
MD5 c8038b55420cdafb08e240d88a6238d3
SHA1 c208416bc5bac6f32f3827e2f5f887a8aea52b23
SHA512 44c80bd7901d0b12904e93acc602aa505f64b4dff272b589d37c56460d3e296b63930ae6928d64e28e8bc9c13459e2413207bb00b88323debdccafb5b70e486f
MD5 SHA1 SHA512

Submit Download

61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe

Path C:\Users\Admin\AppData\Local\6276f3c6-3901-4ae0-9398-54d73e959e3d\61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55.exe
Size 763KB
SHA256 61812fd8c662ffa08bacc791b2a4eb34919a4f59605dbaf55d3da2de5aa5fa55
MD5 ec08899e9c4e22a4ac745fab0207a302
SHA1 fb1d3fff916c6caaf4b7f82b29863266508e2084
SHA512 2e257668149547d0d118bf5c09952c5d4a5c15a6887cdf9405120bded12a99564b75ed551d3878898aca356534347dbf5da111db6228444ab47f37b515f4054c
SSDEEP 12288:NwWicSLbhks/EuhaIVFGbTGfHyBjF4Vhm2NOjvBiXygQIMnbWAX+:XSL9kYFaIVFG/GfHy9F4HOjPgCbWo
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2056-21-0x0000000001D80000-0x0000000001E21000-memory.dmp

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memory/2712-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2712-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3912-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3912-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3912-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3912-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3912-1-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4832-3-0x0000000001D70000-0x0000000001E05000-memory.dmp

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memory/4832-4-0x00000000036F0000-0x000000000380B000-memory.dmp

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