djvu | 8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6

Analysis

max time kernel
146s
max time network
132s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
09/05/2024, 04:41

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General

Target
8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
Size 759KB
Sample240509-fa5zvabc2t
SHA256 8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6
MD5 e38a5eff477b506b2578df0aa0eda7ea
SHA1 d3fa040f2fdb944f4d344cf759a8f072ba646add
SHA512 4a320b0480cb2685d24059342ca4a05703a9b3124e3a071af2dc56e4c6c54802d9006b1a84153b0823bb1ccbfbbbe9ff7a5496c788f93101783f5784de8190a8
SSDEEP 12288:vPh0e6R6LvCsIqpx1tAiBy4/QQd7NPp9Bh7BMoMNFmNGJK:vPh0DMLtf/QQHPpnZrQFmsJ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.qehu
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e 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: 0868PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/2012-2-0x00000000049B0000-0x0000000004ACB000-memory.dmp	family_djvu
behavioral2/memory/1976-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1976-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1852-37-0x0000000000400000-0x0000000000537000-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
4912	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-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\069c30ee-c4f6-43f4-bf54-263ec09a1194\\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe\" --AutoStart"	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.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
8	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2012 set thread context of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 3144 set thread context of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85

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
1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
1852	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
1852	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 2012 wrote to memory of 1976	2012	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	80
PID 1976 wrote to memory of 4912	1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	81
PID 1976 wrote to memory of 4912	1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	81
PID 1976 wrote to memory of 4912	1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	81
PID 1976 wrote to memory of 3144	1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	82
PID 1976 wrote to memory of 3144	1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	82
PID 1976 wrote to memory of 3144	1976	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	82
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85
PID 3144 wrote to memory of 1852	3144	8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe	85

C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
"C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
  "C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\069c30ee-c4f6-43f4-bf54-263ec09a1194" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4912
- - C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
    "C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3144
  - - C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
      "C:\Users\Admin\AppData\Local\Temp\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1852

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 543b85ccce008b8183762d5314650e04a3e3574673e62209965853a497a77a23
MD5 01f6d72b5b393cc9da0cf0999531628c
SHA1 575a3ce0e00e20cbcf5f108654b653b7abf0ce73
SHA512 e2f68cea9401796945b9322e7dfa727c503fa17d3f344c329194c1038e4239421d350a725ce806084e4e797d87a0f629eb25fe5f6f42e605305d079a0cdb2ec6
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 9c69976107df50996bd3d640bffd6357ccf7965871744efca57d67c6b9d36fe4
MD5 9c3c2653ca2cb7bb23479657cc0f6dc0
SHA1 5946061069f2649b12b378f7f46e8d47f0cfcfd5
SHA512 96943df6d098ae248f340f2fb1fc661f7ad539f2ff9f464a549a5473b0cc6fda41e72710a8a1e758d844a8155f4890a896170b5cbdcf5fd7ce053afeb50de459
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 92c95ecaf912341d09a73cd5f779cecfbb6859652aedc1bd361925b9735342fc
MD5 4105114bbe86f581736c72201a0d2920
SHA1 c5308baddb2695d2248137cf73618b7a76c0f900
SHA512 97ec3783f4533eb01fd5ee23f5dcfa395a7a39ee33a09c36c4674d3d01f8b6544f11af90e6daf957b2ddbbd138d91961b7f00ebd4a97dcb6e71706cbe9f5bf34
MD5 SHA1 SHA512

Submit Download

8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe

Path C:\Users\Admin\AppData\Local\069c30ee-c4f6-43f4-bf54-263ec09a1194\8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6.exe
Size 759KB
SHA256 8c379ac9669315bcf7cc2343d08f6ffeec808cfd4d2528a2a5d8cac8f8a428e6
MD5 e38a5eff477b506b2578df0aa0eda7ea
SHA1 d3fa040f2fdb944f4d344cf759a8f072ba646add
SHA512 4a320b0480cb2685d24059342ca4a05703a9b3124e3a071af2dc56e4c6c54802d9006b1a84153b0823bb1ccbfbbbe9ff7a5496c788f93101783f5784de8190a8
SSDEEP 12288:vPh0e6R6LvCsIqpx1tAiBy4/QQd7NPp9Bh7BMoMNFmNGJK:vPh0DMLtf/QQHPpnZrQFmsJ
MD5 SHA1 SHA512 SSDEEP

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memory/1852-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1852-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1976-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2012-2-0x00000000049B0000-0x0000000004ACB000-memory.dmp

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memory/2012-1-0x0000000002D50000-0x0000000002DF1000-memory.dmp

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