djvu | fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db

Analysis

max time kernel
144s
max time network
123s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
27/04/2024, 04:31

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General

Target
fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
Size 749KB
Sample240427-e5t1dsbh3v
SHA256 fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db
MD5 405fa82f7609788bd9f49c648001b9c2
SHA1 9e92fa5a7be663de0f9cc23564b372ffd118ae8a
SHA512 4a0ab8aca553761b176a840d0c554565e8803b5baf54d9eba7c9f4c34f3c34080c6b692db281058c9a73956d3400c52de67fedb925e58cf0aa0d87e5cf882e4e
SSDEEP 12288:oi5Qtbw7yGJV9KjAn8+fbXD6UkrW6qZzriEPnVDJoxufR4z8tCQSW:oi26yaPbXDkKZCsDJoxuJ
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 15 IoCs

resource	yara_rule
behavioral2/memory/1448-2-0x00000000031B0000-0x00000000032CB000-memory.dmp	family_djvu
behavioral2/memory/5024-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5024-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4296-39-0x0000000000400000-0x0000000000537000-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
1900	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-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c4e24106-404b-4d4e-a2db-0cf6e8e888d5\\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe\" --AutoStart"	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.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
5	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1448 set thread context of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 4268 set thread context of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83

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
5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
4296	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
4296	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 1448 wrote to memory of 5024	1448	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	78
PID 5024 wrote to memory of 1900	5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	79
PID 5024 wrote to memory of 1900	5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	79
PID 5024 wrote to memory of 1900	5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	79
PID 5024 wrote to memory of 4268	5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	80
PID 5024 wrote to memory of 4268	5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	80
PID 5024 wrote to memory of 4268	5024	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	80
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83
PID 4268 wrote to memory of 4296	4268	fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe	83

C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
"C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1448
- C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
  "C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5024
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c4e24106-404b-4d4e-a2db-0cf6e8e888d5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1900
- - C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
    "C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4268
  - - C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
      "C:\Users\Admin\AppData\Local\Temp\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4296

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 a42d630466ffb7829547d37a172374e311df8b7172fb6bb97256ca5a1a61d034
MD5 8e70f07036de05373d591aeeb4465c89
SHA1 094a9218d0dd9b7eee8f6f5205985c0e002a3cac
SHA512 72949621f84d8c1cac2cc77a41682ac392b4f39525f2bdbdcddcd8e181a2770d13feff780cdeb44e49607422656c972fc7e1884826a825054f2743b7d598f683
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 47edf2130038dd1a6f26390f5e0c90797a190b445e79c0487326b435c339ee7d
MD5 6dcd888ef824c908ad70341f875e9db7
SHA1 9a23b36f8ebbc49bfbb02a97d440b40019b93aad
SHA512 949361b25e4cca233a201fe08923153268a6d918de6bed8c6401ce372380bfd1b7106b28aaefce9ff903c49f56404d72ce0de1ad3c845fa3339277386511351a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 11ad45bab5a71419f286c5303c3a6b0ce3d8b95a6399fd325935406282176122
MD5 6924117d4a2319c216939f0cfddc5cc2
SHA1 b5aa20d8d24cd7f67a93be3d5179937252409feb
SHA512 7537d1a897758ee74794c7deeaeb4ca5142f2afafdaceb9b33c5e9e79b7bc318b4932b11d55a29b51fdb89a902fcc173c278ec83a232ce15a4622126e314eedf
MD5 SHA1 SHA512

Submit Download

fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe

Path C:\Users\Admin\AppData\Local\c4e24106-404b-4d4e-a2db-0cf6e8e888d5\fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db.exe
Size 749KB
SHA256 fbc93d8d0eda6efd4ab55b387f1b1a3dda0730c6e06deeb5666f8b7ec8e6b1db
MD5 405fa82f7609788bd9f49c648001b9c2
SHA1 9e92fa5a7be663de0f9cc23564b372ffd118ae8a
SHA512 4a0ab8aca553761b176a840d0c554565e8803b5baf54d9eba7c9f4c34f3c34080c6b692db281058c9a73956d3400c52de67fedb925e58cf0aa0d87e5cf882e4e
SSDEEP 12288:oi5Qtbw7yGJV9KjAn8+fbXD6UkrW6qZzriEPnVDJoxufR4z8tCQSW:oi26yaPbXDkKZCsDJoxuJ
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1448-2-0x00000000031B0000-0x00000000032CB000-memory.dmp

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memory/1448-1-0x0000000003110000-0x00000000031AA000-memory.dmp

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memory/4296-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4296-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5024-19-0x0000000000400000-0x0000000000537000-memory.dmp

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