djvu | ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8

Analysis

max time kernel
141s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
09/05/2024, 19:33

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General

Target
ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
Size 741KB
Sample240509-x919daba71
SHA256 ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8
MD5 231215863f756fd25f44e2d6d1a97083
SHA1 d4fa60af5e70095d684a1f0ad1285f5a0e8413f4
SHA512 e35693cf880bcf009cbd3557c702e2e47dff43e757aeee6d79714647a15384d235f5d2f7ca551b46e156c28a9f6ca5920e4fe5e87a80fdd22b4577d9c38095ed
SSDEEP 12288:eicJ/mE6wdYnt7SEVjnhxLn4ox+sGiFSGDpD/BSuO9J/+OvRUmHg5Z3Qlz:eicBmEPSMYjnTj4rVaS2zBSusJ1vrHg
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/3800-2-0x0000000004940000-0x0000000004A5B000-memory.dmp	family_djvu
behavioral2/memory/804-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/804-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/804-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/804-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/804-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4584-37-0x0000000000400000-0x0000000000537000-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
2056	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-1-5-21-3938118698-2964058152-2337880935-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e77945f1-26ef-4fce-9218-63abc1b2726e\\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe\" --AutoStart"	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.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
8	api.2ip.ua
1	api.2ip.ua
2	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3800 set thread context of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 4516 set thread context of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.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
804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
4584	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
4584	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 3800 wrote to memory of 804	3800	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	82
PID 804 wrote to memory of 2056	804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	83
PID 804 wrote to memory of 2056	804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	83
PID 804 wrote to memory of 2056	804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	83
PID 804 wrote to memory of 4516	804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	84
PID 804 wrote to memory of 4516	804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	84
PID 804 wrote to memory of 4516	804	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	84
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87
PID 4516 wrote to memory of 4584	4516	ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe	87

C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
"C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3800
- C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
  "C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e77945f1-26ef-4fce-9218-63abc1b2726e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2056
- - C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
    "C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4516
  - - C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
      "C:\Users\Admin\AppData\Local\Temp\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4584

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 b50c616b5c29bd9611ed360a238b6b6c421d0fe3b85df331e4951aefab526b2e
MD5 5857aff0ea0365561d0f06769a04101c
SHA1 0ac570f0ec93618c5849baf94c0a167e4a706a95
SHA512 1863b40407893a4a26beaa7ae4add199676c15b633d59afb4dfd2906328b29497fdddcb0ff01b9ba77ac59c5c55511fa669b0ffd6e02bcfa2d2cc53df62390be
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 a34ef5de089e4471be7ad369269fa620e1546d26f7ebb263050e83230fbf5cf3
MD5 499d7247ee9c025d104aceac9ac1263c
SHA1 92c0ebb5dea6fd7ff400ba07315df5364fa0cee7
SHA512 ee20c1bfb729f226ff20ed93f44e9bc6bea77517fa4733f06a2bad2251abf3fa1d9f99e1966cb061ca5463bf1a2881ff37a4bc4ad1b0c343f8ad6380ae22b95d
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 834ad64223eb1a8dd5380c87f02d994ef113789bbab95681f1f19be693290511
MD5 8580eab44c55a37ba0a2f171cac1494c
SHA1 4cde6335cd214b52993f7d5d8165655954d35e3d
SHA512 caa5c6cc58eb443eeec2872db08acb96c4dfac116fec65a03500b2194986b10050cb69d9cf8e5aa8ca267a70639c084231c2e7638c8b22fe1eef91a5fc6a11b6
MD5 SHA1 SHA512

Submit Download

ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe

Path C:\Users\Admin\AppData\Local\e77945f1-26ef-4fce-9218-63abc1b2726e\ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8.exe
Size 741KB
SHA256 ea01cdded80e41e35446ea3c5e0253e8f57dca381c335678760ab0c6b07b1ed8
MD5 231215863f756fd25f44e2d6d1a97083
SHA1 d4fa60af5e70095d684a1f0ad1285f5a0e8413f4
SHA512 e35693cf880bcf009cbd3557c702e2e47dff43e757aeee6d79714647a15384d235f5d2f7ca551b46e156c28a9f6ca5920e4fe5e87a80fdd22b4577d9c38095ed
SSDEEP 12288:eicJ/mE6wdYnt7SEVjnhxLn4ox+sGiFSGDpD/BSuO9J/+OvRUmHg5Z3Qlz:eicBmEPSMYjnTj4rVaS2zBSusJ1vrHg
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/804-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/804-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/804-19-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/804-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/804-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3800-2-0x0000000004940000-0x0000000004A5B000-memory.dmp

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memory/3800-1-0x0000000002ED0000-0x0000000002F68000-memory.dmp

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memory/4584-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4584-37-0x0000000000400000-0x0000000000537000-memory.dmp

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