djvu | 7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f

Analysis

max time kernel
146s
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
02/05/2024, 07:02

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General

Target
7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
Size 770KB
Sample240502-htxtpaea48
SHA256 7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f
MD5 f8f2218cfae4898a2e8db96504db0003
SHA1 dffa3246484e614eea1d768ed210d50337a37777
SHA512 c7933b017cf7c4edbba1ffca55dbf8a82fa1f8a45b3c5b511c5115c2733e33cad54026c74ff9140910c4f6c44a47223fcc0fed9ebe930b14a6f1d4016c62c982
SSDEEP 12288:hWoSXGBVj2T6JNbFExHfSiZXN5aIZgVX00WHT+KfkARbsbl1z3nr+4lHuF9gsvJ0:BBViT6bO50IZgxK8Nz3nrPlHuLgsvJ0
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 17 IoCs

resource	yara_rule
behavioral2/memory/3036-2-0x0000000003860000-0x000000000397B000-memory.dmp	family_djvu
behavioral2/memory/5068-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5068-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5068-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5068-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5068-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/640-41-0x0000000000400000-0x0000000000537000-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
720	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-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\79636df2-a2df-4a23-9d2a-87497e4972cf\\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe\" --AutoStart"	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.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
3	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3036 set thread context of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3052 set thread context of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.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
5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
640	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
640	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 3036 wrote to memory of 5068	3036	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	78
PID 5068 wrote to memory of 720	5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	79
PID 5068 wrote to memory of 720	5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	79
PID 5068 wrote to memory of 720	5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	79
PID 5068 wrote to memory of 3052	5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	80
PID 5068 wrote to memory of 3052	5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	80
PID 5068 wrote to memory of 3052	5068	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	80
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83
PID 3052 wrote to memory of 640	3052	7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe	83

C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
"C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3036
- C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
  "C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5068
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\79636df2-a2df-4a23-9d2a-87497e4972cf" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:720
- - C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
    "C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3052
  - - C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
      "C:\Users\Admin\AppData\Local\Temp\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:640

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 1900c86cf885b5a30f4c6978db628caa35291d0ea1c37ada12638fadadb66467
MD5 1954f91d1857433a6e671fc2134627c4
SHA1 6ec0f77b96e790e17142ddafd79cf8a0d7873da0
SHA512 ca48210f22c6391ab07e05f4cb06729673713214ec81d6934fdade2df472f2f6af013bdb7dbaf3baaf678e771a01604a654b22ec696f3f9a93fe8e73b77ba129
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 163ea5c38913d0469b7de62f2211cb4906b9957fc660676bac6184d94928ab19
MD5 5c7101ff5b711648ff4846a42e14c8b1
SHA1 d30e9b9d158f4bf38aa36d8ff9239d3ec5baef30
SHA512 a215e700664f3431cddafc2b999843d85c13859e8a5d82b7d4310d7d8a3fa2e3e68e64015da996426b08c75f2d15cc018eba186c2d6852467339cde6822cd70a
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 0c76381d6b6d02cdcb3c82a8f7528ba43797078ac85899ef44d8e5c1dab61f10
MD5 e58a2fb5367ecd016eac875d399a32fc
SHA1 1a9c5bbbda4d040c8ed1b8ae498dbfef31fc657e
SHA512 e129f785f10c9b8f4d8308c63cd9c066e38c40e7628d1f057c0297d56c8386f5d66fdcaf061edca4f2bd64a2d89487e5d88055eea6ccc28947ef5411e64ced47
MD5 SHA1 SHA512

Submit Download

7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe

Path C:\Users\Admin\AppData\Local\79636df2-a2df-4a23-9d2a-87497e4972cf\7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f.exe
Size 770KB
SHA256 7343a006f3a2561f348063494d5cdc7d2c80d24092853fd638b14f981eaf679f
MD5 f8f2218cfae4898a2e8db96504db0003
SHA1 dffa3246484e614eea1d768ed210d50337a37777
SHA512 c7933b017cf7c4edbba1ffca55dbf8a82fa1f8a45b3c5b511c5115c2733e33cad54026c74ff9140910c4f6c44a47223fcc0fed9ebe930b14a6f1d4016c62c982
SSDEEP 12288:hWoSXGBVj2T6JNbFExHfSiZXN5aIZgVX00WHT+KfkARbsbl1z3nr+4lHuF9gsvJ0:BBViT6bO50IZgxK8Nz3nrPlHuLgsvJ0
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/640-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-41-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-25-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/640-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3036-1-0x00000000037C0000-0x000000000385D000-memory.dmp

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memory/3036-2-0x0000000003860000-0x000000000397B000-memory.dmp

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memory/3052-34-0x0000000000400000-0x0000000001A8C000-memory.dmp

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memory/3052-24-0x0000000000400000-0x0000000001A8C000-memory.dmp

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memory/5068-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5068-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5068-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5068-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5068-19-0x0000000000400000-0x0000000000537000-memory.dmp

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