djvu | f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
21/05/2024, 17:11

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
Size 738KB
Sample240521-vqpp5ace64
SHA256 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d
MD5 3272f4177ebd454a5d1ba9279f20e1a1
SHA1 fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0
SHA512 6486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047
SSDEEP 12288:MY5C0LI3iARtuv881XKkVrzXyomCOzqlqQE26d:HC0WiAnuHIag26
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.vehu
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 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: 0872PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4968-2-0x0000000004240000-0x000000000435B000-memory.dmp	family_djvu
behavioral2/memory/1956-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1956-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1132-37-0x0000000000400000-0x0000000000537000-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
1968	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-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fb1166c3-a335-41fc-80ea-b1feec2182db\\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe\" --AutoStart"	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.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
7	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4968 set thread context of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 2960 set thread context of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86

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
1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
1132	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
1132	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 4968 wrote to memory of 1956	4968	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	79
PID 1956 wrote to memory of 1968	1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	82
PID 1956 wrote to memory of 1968	1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	82
PID 1956 wrote to memory of 1968	1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	82
PID 1956 wrote to memory of 2960	1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	83
PID 1956 wrote to memory of 2960	1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	83
PID 1956 wrote to memory of 2960	1956	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	83
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86
PID 2960 wrote to memory of 1132	2960	f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe	86

C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
  "C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1956
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\fb1166c3-a335-41fc-80ea-b1feec2182db" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1968
- - C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
    "C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2960
  - - C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
      "C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1132

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

Loading Replay Monitor...

Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99
MD5 df80f9ba75076db634761b6132e0d4e3
SHA1 07983946fb660752c7cccb2ef82d01ec4c9ecc5d
SHA512 4ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a
MD5 SHA1 SHA512

Submit Download

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

Submit Download

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 3a5af594e75d2ba5a44b6eb58628505abab2097e699b68edd128a15d2df49e1a
MD5 ca32f50673d9306664e2006e86edac38
SHA1 9c2988bf138b9999918d70fd27c2005995ef1673
SHA512 ed675691d86da8692da2749ba77ceb2bb358273c2b5956ef14c30d5f773741aec65043fe642186d6473b779d0fba3a0c3eec00fecaecd10893d2f0fe8bfcd901
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 ae2620a3e9e06d8f62065a0273c7e96de1e81a0f7f34b989e14da71e369994c4
MD5 33d61bf27d159382e90fc80609751d58
SHA1 f0efae71dff265d65bf8fd2c0fd6a7f30fc4dbaf
SHA512 195bcbf2ae0f288da3edd38494e65f1c7b9d3817dba493502d23ddde154ba12e350bea9e36f82dbd381214081c6089d9717162c4bb8a0634ea25b191c578b73d
MD5 SHA1 SHA512

Submit Download

f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe

Path C:\Users\Admin\AppData\Local\fb1166c3-a335-41fc-80ea-b1feec2182db\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
Size 738KB
SHA256 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d
MD5 3272f4177ebd454a5d1ba9279f20e1a1
SHA1 fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0
SHA512 6486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047
SSDEEP 12288:MY5C0LI3iARtuv881XKkVrzXyomCOzqlqQE26d:HC0WiAnuHIag26
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1132-29-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-28-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-35-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-22-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-34-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-32-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-37-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1132-27-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1956-6-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1956-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1956-4-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1956-5-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1956-19-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4968-2-0x0000000004240000-0x000000000435B000-memory.dmp

Download

memory/4968-1-0x0000000002600000-0x000000000269C000-memory.dmp

Download