djvu | cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525

Analysis

max time kernel
290s
max time network
299s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
04/05/2024, 22:43

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General

Target
cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
Size 790KB
Sample240504-2newgadh8t
SHA256 cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525
MD5 070c929d197872964e6376ffc396d799
SHA1 981e91f07a3ccb862aff88ccc27e89002c871334
SHA512 0a86709a67bf486a6ff23bc654c8130d46aa4f339e4b739a71d4a5dd5dc7c2948d11ae427674b851e13798e76ee7bc5890feebcbfc8d5501972e50a4147efcba
SSDEEP 12288:wYvYBpes8TulVC/lLdLmUcHMM0+eMxbL6f1Ga4Irwf:aBYuPo1oUGf0IHaMa4l
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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 14 IoCs

resource	yara_rule
behavioral2/memory/2872-2-0x00000000030D0000-0x00000000031EB000-memory.dmp	family_djvu
behavioral2/memory/3360-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3360-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3360-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3360-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3360-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1680-36-0x0000000000400000-0x0000000000537000-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
920	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-1-5-21-160447019-1232603106-4168707212-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\83f6c35b-d633-4c23-a2ac-a6d68a61a87f\\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe\" --AutoStart"	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.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
2	api.2ip.ua
10	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2872 set thread context of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 204 set thread context of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77

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
3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
1680	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
1680	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 2872 wrote to memory of 3360	2872	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	73
PID 3360 wrote to memory of 920	3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	74
PID 3360 wrote to memory of 920	3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	74
PID 3360 wrote to memory of 920	3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	74
PID 3360 wrote to memory of 204	3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	75
PID 3360 wrote to memory of 204	3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	75
PID 3360 wrote to memory of 204	3360	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	75
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77
PID 204 wrote to memory of 1680	204	cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe	77

C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
"C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
  "C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3360
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\83f6c35b-d633-4c23-a2ac-a6d68a61a87f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:920
- - C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
    "C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:204
  - - C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
      "C:\Users\Admin\AppData\Local\Temp\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1680

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 c90743b555faf3ed141c4c83e5002c4da6445c3be1ad82b01c98da2201cf6818
MD5 9ed6fed9b6e5aaa9afcba833c1b8c259
SHA1 2ed30daf7f0277a0718b3d9ce46b0658640cc2ba
SHA512 a9abd9ca06479e56d08e1649b344cfd06beec24567d1053616670afd7f47757d7ab186c2cd20d21f53a901ede92b14382fc42ab21df6605d69702c0368106367
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 e388c8f6ef8f5d92dd0d52c323e600db20a0c32ba3670640aca9e646b8f2a8d7
MD5 2b92f448e86bc8872ef464c252716216
SHA1 e210eab296135e5c18503af43076681d9ddf8f2a
SHA512 8640a4bf8cae77b379bc5cdb04111760c3b9ff9f53cac03e2a097faeae984e5e090be2df0d81fe2b9a0504b183ffdb78c10227ef59deec63250330740b4f7b33
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 4c145a570f60ca20e888cd12118e6c98fcadf50d73a684e9630b81083722f3c6
MD5 7afaa5893db1be499f1dbcf9700fd896
SHA1 ccf1c174c3e19493a3f47f505174ce5456fd369f
SHA512 0fcd7d41053cb22c2f439a2ceb29162caca961f02da4c2394cc9dc9227c2047b45513beee687ac2676d8f3c1cc4bf68285d2aa5ee1a25a975488f853d9957a63
MD5 SHA1 SHA512

Submit Download

cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe

Path C:\Users\Admin\AppData\Local\83f6c35b-d633-4c23-a2ac-a6d68a61a87f\cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525.exe
Size 790KB
SHA256 cfe33b3ccd4e1a6fe6a6164e39f69e1cb470f4fa1e5ddb2c07546e28ee960525
MD5 070c929d197872964e6376ffc396d799
SHA1 981e91f07a3ccb862aff88ccc27e89002c871334
SHA512 0a86709a67bf486a6ff23bc654c8130d46aa4f339e4b739a71d4a5dd5dc7c2948d11ae427674b851e13798e76ee7bc5890feebcbfc8d5501972e50a4147efcba
SSDEEP 12288:wYvYBpes8TulVC/lLdLmUcHMM0+eMxbL6f1Ga4Irwf:aBYuPo1oUGf0IHaMa4l
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1680-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1680-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1680-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1680-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1680-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1680-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1680-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1680-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2872-1-0x0000000002D00000-0x0000000002D94000-memory.dmp

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memory/2872-2-0x00000000030D0000-0x00000000031EB000-memory.dmp

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memory/3360-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3360-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3360-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3360-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3360-19-0x0000000000400000-0x0000000000537000-memory.dmp

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