djvu | bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c

Analysis

max time kernel
142s
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
03/05/2024, 08:03

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General

Target
bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
Size 822KB
Sample240503-jxw71acd98
SHA256 bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c
MD5 e86ad7ca0ff5ce39fd6470dbccb072b6
SHA1 e93125be418453badb1423b876591eb8561ca0b2
SHA512 484a0fcc359db0d94c0e519ec4beeafdda600b17a097c9416178305714eb557e4fd4750780973969ab3a7b54add6d9a8742bdea965324bb17d28ee5eed7a9453
SSDEEP 12288:5tlp5vUjhnvTFqAEmQ4sNnZeQQ9lsX4Fx6yJ9jIIKQJ0Pv7M5c:5vvARTIAErsQGlsX4v6S9hJ037
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 18 IoCs

resource	yara_rule
behavioral2/memory/2404-2-0x0000000003840000-0x000000000395B000-memory.dmp	family_djvu
behavioral2/memory/3252-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3252-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3252-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3252-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3252-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3972-34-0x0000000000400000-0x0000000001A98000-memory.dmp	family_djvu
behavioral2/memory/4088-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-41-0x0000000000400000-0x0000000000537000-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
2944	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\\fcd2cca4-a001-4545-89b3-91849c786dba\\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe\" --AutoStart"	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.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 2404 set thread context of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 3972 set thread context of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87

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
3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
4088	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
4088	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 2404 wrote to memory of 3252	2404	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	80
PID 3252 wrote to memory of 2944	3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	82
PID 3252 wrote to memory of 2944	3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	82
PID 3252 wrote to memory of 2944	3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	82
PID 3252 wrote to memory of 3972	3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	83
PID 3252 wrote to memory of 3972	3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	83
PID 3252 wrote to memory of 3972	3252	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	83
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87
PID 3972 wrote to memory of 4088	3972	bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe	87

C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
"C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
  "C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3252
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\fcd2cca4-a001-4545-89b3-91849c786dba" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2944
- - C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
    "C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3972
  - - C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
      "C:\Users\Admin\AppData\Local\Temp\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4088

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 129164308e702fdc66b08a3e37443c3538cb38d3f8a9ec9f2fc242809eb2f745
MD5 fb03526b897d572b399f3cba89305c9d
SHA1 8af3cc1409538d35897494cebe129fbd25de3bdb
SHA512 a91a001a7d0ef541fb2ee9e95a441a651a5555a9b2575872aaa5fe376fb80c60fbc67183a34d24291d1b255d6a216455e93c05b1533a2c235bea40d947e96c09
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 1da872a485fd6297dc279e8986a32cea534b000f8ccbe8d82d21d974040f4066
MD5 f9f1a098d9cd086942386f1282226c14
SHA1 13919d5233b23a2a035c43e98f9dd1288c17dd66
SHA512 c697853e3767edce3760e7c1ae5fc4cabebb6cb2033a93d29d4919cad26a8491cf8a784d012102ced1e1a87d222617e6d308dfbfec87c7735cc9af3f40a66e91
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 8494bfc630fdbd342bf13d0e3c9e0d139f5432720ab38cb01fb910f899fcd0f4
MD5 69c7eb7b07d8d87166d9dafc352e227e
SHA1 2532a45f52ebc348c3c4773111d5878ebda34454
SHA512 67143aa3dbcde88219d97ac50337b83cac84c486968968b34f175a7ff49d9199e24db3588e2e04d4a3c4e1c2252d59c6a89b7e66ac05ff6c363e02004047604b
MD5 SHA1 SHA512

Submit Download

bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe

Path C:\Users\Admin\AppData\Local\fcd2cca4-a001-4545-89b3-91849c786dba\bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c.exe
Size 822KB
SHA256 bd6ff6d148314495d69e59bb1d9d94bca1f8bda279a801d2f8ed8c9b3d3abd8c
MD5 e86ad7ca0ff5ce39fd6470dbccb072b6
SHA1 e93125be418453badb1423b876591eb8561ca0b2
SHA512 484a0fcc359db0d94c0e519ec4beeafdda600b17a097c9416178305714eb557e4fd4750780973969ab3a7b54add6d9a8742bdea965324bb17d28ee5eed7a9453
SSDEEP 12288:5tlp5vUjhnvTFqAEmQ4sNnZeQQ9lsX4Fx6yJ9jIIKQJ0Pv7M5c:5vvARTIAErsQGlsX4v6S9hJ037
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2404-1-0x0000000001D00000-0x0000000001D97000-memory.dmp

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memory/2404-2-0x0000000003840000-0x000000000395B000-memory.dmp

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memory/3252-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3252-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3252-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3252-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3252-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3972-24-0x0000000000400000-0x0000000001A98000-memory.dmp

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memory/3972-34-0x0000000000400000-0x0000000001A98000-memory.dmp

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memory/4088-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-41-0x0000000000400000-0x0000000000537000-memory.dmp

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