djvu | f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f

Analysis

max time kernel
290s
max time network
298s
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, 22:48

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General

Target
f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
Size 800KB
Sample240504-2ra2pahc57
SHA256 f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f
MD5 8753ad77bc0fca5d9169dce366018d43
SHA1 586fcc7b2e3da29c8d170cea06b201dcc72f115a
SHA512 e1f5b3f373db1ecfa609cd6176c643f10e1604b199904bd019afba6ef24a140ae4bab56225df7aa9d2092ed99f386e7128978552cb6e55927dffadf52f197c5e
SSDEEP 12288:IsdM2Vyj2Tol8fmpTkYVlm9VfQr36sbYDv0jvkRd70pHf:IshAyY8fGm9VIr3MDcmto
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 14 IoCs

resource	yara_rule
behavioral2/memory/2360-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5036-4-0x00000000048F0000-0x0000000004A0B000-memory.dmp	family_djvu
behavioral2/memory/2360-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2360-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2360-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2360-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1316-36-0x0000000000400000-0x0000000000537000-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
2520	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c1e0f82e-6268-4c16-9a02-8fd89433323c\\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe\" --AutoStart"	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.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
10	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5036 set thread context of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5096 set thread context of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76

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
2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
1316	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
1316	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 5036 wrote to memory of 2360	5036	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	72
PID 2360 wrote to memory of 2520	2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	73
PID 2360 wrote to memory of 2520	2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	73
PID 2360 wrote to memory of 2520	2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	73
PID 2360 wrote to memory of 5096	2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	74
PID 2360 wrote to memory of 5096	2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	74
PID 2360 wrote to memory of 5096	2360	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	74
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76
PID 5096 wrote to memory of 1316	5096	f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe	76

C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
"C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5036
- C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
  "C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2360
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c1e0f82e-6268-4c16-9a02-8fd89433323c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2520
- - C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
    "C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:5096
  - - C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
      "C:\Users\Admin\AppData\Local\Temp\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1316

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

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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 b5a5f32c20bd4ed369e6ce63b9a6550b6818616ce9a6145f61b700ff985eb8b1
MD5 8d6fe451b7a98cf8a7e7ccc363e60778
SHA1 1d8098f0691b8f2b55dbeab398cdc47e411aa7f5
SHA512 1c0244d4b017315e50ee4a0cdb1707ea8317c2bbc7ae0a49a1f8926de7c468a3d1760ca86a5e484a4e4070825d841cbd98a3f448af55a767a217f464751e0061
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 844fa6a75fa1aa3e4ca165338a40b1c98731c402605c86c5a11e31884cb3cb27
MD5 be2d1a2ccff28bdc747fba277831e3a9
SHA1 a973216cbd83fa21e9b7645d7c150756083cd8ed
SHA512 acd3a0daf007bb047859fd4ffd848184ede38fe45d602d24aa85c4dc9d5d53c1f855e88bf3bb52fa32032c5b5b4b092d9ae0f21a21a98eaaf8867fecf10bbea1
MD5 SHA1 SHA512

Submit Download

f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe

Path C:\Users\Admin\AppData\Local\c1e0f82e-6268-4c16-9a02-8fd89433323c\f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f.exe
Size 800KB
SHA256 f7f4cb5d684cb649f4af43c8ffba57f45fbae0f65ff5779d1713668519aa144f
MD5 8753ad77bc0fca5d9169dce366018d43
SHA1 586fcc7b2e3da29c8d170cea06b201dcc72f115a
SHA512 e1f5b3f373db1ecfa609cd6176c643f10e1604b199904bd019afba6ef24a140ae4bab56225df7aa9d2092ed99f386e7128978552cb6e55927dffadf52f197c5e
SSDEEP 12288:IsdM2Vyj2Tol8fmpTkYVlm9VfQr36sbYDv0jvkRd70pHf:IshAyY8fGm9VIr3MDcmto
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1316-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1316-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2360-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5036-4-0x00000000048F0000-0x0000000004A0B000-memory.dmp

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memory/5036-1-0x00000000030A0000-0x0000000003142000-memory.dmp

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