djvu | 47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d

Analysis

max time kernel
141s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
18/05/2024, 16:50

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General

Target
47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
Size 721KB
Sample240518-vchdwsdd69
SHA256 47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d
MD5 9de3805ed1872ac73a263c4ee2771fd6
SHA1 47a80ed5a5623763efbc9f9c7aa525df0d1018e8
SHA512 66f7e31acef6812f820c14e41d12898be85be8f7e5babeab0dabddcacf2417c6c89c9917b433a7421307d9eaf09026252ab3e74c26aa2cee05f1395b635a0b4b
SSDEEP 12288:+LCzvnP0MT4GAMu8P/tvHD5DmDw71g41bBzojKv3+YtzK0n:+OvnT4PXyl75607pPz7u0
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/5004-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5004-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5004-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5004-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4088-2-0x00000000041C0000-0x00000000042DB000-memory.dmp	family_djvu
behavioral2/memory/5004-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2640-37-0x0000000000400000-0x0000000000537000-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
3536	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-1-5-21-1696768468-2170909707-4198977321-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d8e8199c-4ed6-48a0-9f19-4159a774dcc1\\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe\" --AutoStart"	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.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
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4088 set thread context of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 2116 set thread context of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.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
5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
2640	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
2640	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 4088 wrote to memory of 5004	4088	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	79
PID 5004 wrote to memory of 3536	5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	81
PID 5004 wrote to memory of 3536	5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	81
PID 5004 wrote to memory of 3536	5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	81
PID 5004 wrote to memory of 2116	5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	82
PID 5004 wrote to memory of 2116	5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	82
PID 5004 wrote to memory of 2116	5004	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	82
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85
PID 2116 wrote to memory of 2640	2116	47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe	85

C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
"C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4088
- C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
  "C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:5004
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\d8e8199c-4ed6-48a0-9f19-4159a774dcc1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3536
- - C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
    "C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2116
  - - C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
      "C:\Users\Admin\AppData\Local\Temp\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2640

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 a4b814a66a9da593fcbbdcdbcd0feb44a23e19970b70045c70f3aa8c094cd574
MD5 53bbe16978d780a454fd4733bae09809
SHA1 0b56e3534ad80f541d1a6b252a5ede30eec6f3da
SHA512 5edd384f29f01c3fa280b593a03bffd3d8548780cfa375e39cbb69d82c3037601161d2eb24c68ac19c87fb25cd7325239ab7ce3f30271f8a330f74e810cacafd
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

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 d61c5cc27d0d2c31e9b20bbcb4bf9f9d67668a13ac60d067932c677428e98c43
MD5 4e568a896c048c026d854b4e18e86f80
SHA1 6de5a28259379a0099f90088942805cd14daba67
SHA512 0417ce842cf1d782576e4ba3af9c5f39bc583cc4317b4073e0437314a74c111f3d3744c1997ab91e343015c56f8741f470aa3bca3c8ca417eae71cd1c37e6751
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 98366b521c9a93a86357497ab4630a4bd70649278a2b362ede6f1239196698b2
MD5 2718d8f659448412df4bc91535634190
SHA1 b97e2e049b3efa818a82a08dcacfa78d8d563f06
SHA512 6b84072b11153d3e7ffe7c2952a065c757c90fb261ae7152933f6684be163efea4fb54321560f4da99ecb758a588f25b46c5d747dc5216931515648ccecb883c
MD5 SHA1 SHA512

Submit Download

47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe

Path C:\Users\Admin\AppData\Local\d8e8199c-4ed6-48a0-9f19-4159a774dcc1\47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d.exe
Size 721KB
SHA256 47e96133b30056537c9d4dadcab628450bfe809aff9012971e182f5b7fb2666d
MD5 9de3805ed1872ac73a263c4ee2771fd6
SHA1 47a80ed5a5623763efbc9f9c7aa525df0d1018e8
SHA512 66f7e31acef6812f820c14e41d12898be85be8f7e5babeab0dabddcacf2417c6c89c9917b433a7421307d9eaf09026252ab3e74c26aa2cee05f1395b635a0b4b
SSDEEP 12288:+LCzvnP0MT4GAMu8P/tvHD5DmDw71g41bBzojKv3+YtzK0n:+OvnT4PXyl75607pPz7u0
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2640-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2640-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4088-2-0x00000000041C0000-0x00000000042DB000-memory.dmp

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memory/4088-1-0x00000000040F0000-0x000000000418D000-memory.dmp

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memory/5004-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5004-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5004-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5004-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5004-19-0x0000000000400000-0x0000000000537000-memory.dmp

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