djvu | b5ebf4054d626e0602fd52c351ffba4c7c43f06d61c9e590c4f4bd77347094d7

Analysis

max time kernel
333s
max time network
306s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
15/01/2024, 19:09

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General

Target
ransomware.exe
Size 709KB
Sample240115-xt332aeeh9
SHA256 b5ebf4054d626e0602fd52c351ffba4c7c43f06d61c9e590c4f4bd77347094d7
MD5 d2243b032f9b9226d85de43b5b88480d
SHA1 7643fc0978122e1862d855af3c2b066c715beacd
SHA512 c2561dbb57fe48a6591a70b3ab48de866013f8d03f5b18356a7304f546b0b852097ff6800f98ab319929089631d59eef00384f6619fb4a271c31b22b54f87b75
SSDEEP 12288:f6aD7FoQiBMyk5EYvgPZfJGrFWCyYTI84EPSW+z7AuLQ59GnIZvmZHst9HhUUX:hPFoQiBMf5EYYDYFBCNEaWyLQ93v2Hkd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdmx
offline_id
mMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
payload_url
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. You can get and look video overview decrypt tool: https://we.tl/t-99MNqXMrdS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. 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: 0841ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/3184-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3184-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3184-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3184-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2200-2-0x0000000002760000-0x000000000287B000-memory.dmp	family_djvu
behavioral2/memory/3184-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4524-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	ransomware.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4832	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-1-5-21-768304381-2824894965-3840216961-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\2f96228e-5adf-4b15-aed3-6b676f8a5996\\ransomware.exe\" --AutoStart"	ransomware.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
3	api.2ip.ua
5	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2200 set thread context of 3184	2200	ransomware.exe	88
PID 1796 set thread context of 4524	1796	ransomware.exe	92

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
3184	ransomware.exe
3184	ransomware.exe
4524	ransomware.exe
4524	ransomware.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 2200 wrote to memory of 3184	2200	ransomware.exe	88
PID 3184 wrote to memory of 4832	3184	ransomware.exe	89
PID 3184 wrote to memory of 4832	3184	ransomware.exe	89
PID 3184 wrote to memory of 4832	3184	ransomware.exe	89
PID 3184 wrote to memory of 1796	3184	ransomware.exe	90
PID 3184 wrote to memory of 1796	3184	ransomware.exe	90
PID 3184 wrote to memory of 1796	3184	ransomware.exe	90
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92
PID 1796 wrote to memory of 4524	1796	ransomware.exe	92

C:\Users\Admin\AppData\Local\Temp\ransomware.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Users\Admin\AppData\Local\Temp\ransomware.exe
  "C:\Users\Admin\AppData\Local\Temp\ransomware.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3184
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\2f96228e-5adf-4b15-aed3-6b676f8a5996" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4832
- - C:\Users\Admin\AppData\Local\Temp\ransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\ransomware.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1796
  - - C:\Users\Admin\AppData\Local\Temp\ransomware.exe
      "C:\Users\Admin\AppData\Local\Temp\ransomware.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4524

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

Query Registry

T1012

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 a2b62727608d9216237a6608a2e995c28d3656b72c06ee0b651878f26df7e8ff
MD5 10bc1463c2326403e6e2a83112554add
SHA1 554df3e5bd0842d1d5be8331bf765b6f6ccd0afe
SHA512 6ba098756dec7fd32d25c208ced685781b78e125d0302af91ef2478793169f7a9d5a34219f5bdd83fcc16c64dbd2bf70e190ad482ddb9d878be32b10110f0d5c
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 cc9542c4faae35ff2ade258cdcaa28c197ae8b31a65ebef50b70d9fa65ec5a2c
MD5 958469b57d79bb365d3f1b45fb5206a1
SHA1 6504dd4c96f11d5d100bf81a6a7a6aef85da58e1
SHA512 7e7be8e7ebf2137829246963ae82c3259cddec6699a11e57c8948acb1b7070cd552ab67755afee8ddc8acda08f7e7b0f7aa9062f08ddd4293b79a08a432ff550
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 218022e77fe10a91bae6fb7aa8a85c5ab1a3d9690d2e16b6dd0fe7810bcf3eae
MD5 1c3798465ec75a835bc14a3d54c0d9ec
SHA1 930e6f5977a018ec83fa16706f4e425af4974688
SHA512 71cadc4bae416db9077dfcd476e2201d18d0d6eab8698e35406eeda7f9b183ad7451b18a71e3bdf8d791ca0b12a3dd906b677f7129d12e213627af1ada029209
MD5 SHA1 SHA512

Submit Download

ransomware.exe

Path C:\Users\Admin\AppData\Local\2f96228e-5adf-4b15-aed3-6b676f8a5996\ransomware.exe
Size 709KB
SHA256 b5ebf4054d626e0602fd52c351ffba4c7c43f06d61c9e590c4f4bd77347094d7
MD5 d2243b032f9b9226d85de43b5b88480d
SHA1 7643fc0978122e1862d855af3c2b066c715beacd
SHA512 c2561dbb57fe48a6591a70b3ab48de866013f8d03f5b18356a7304f546b0b852097ff6800f98ab319929089631d59eef00384f6619fb4a271c31b22b54f87b75
SSDEEP 12288:f6aD7FoQiBMyk5EYvgPZfJGrFWCyYTI84EPSW+z7AuLQ59GnIZvmZHst9HhUUX:hPFoQiBMf5EYYDYFBCNEaWyLQ93v2Hkd
MD5 SHA1 SHA512 SSDEEP

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memory/1796-20-0x00000000023D0000-0x0000000002463000-memory.dmp

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memory/2200-1-0x0000000002660000-0x00000000026F3000-memory.dmp

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memory/2200-2-0x0000000002760000-0x000000000287B000-memory.dmp

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memory/3184-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3184-17-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3184-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3184-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3184-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-24-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4524-40-0x0000000000400000-0x0000000000537000-memory.dmp

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