djvu | 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63

Analysis

max time kernel
144s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 08:54

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 749KB
Sample240126-ktyr4abdhm
SHA256 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
MD5 87ba288f14fbf826d4cf061d9f8e72ed
SHA1 ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA512 200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
SSDEEP 12288:lL++FQkxaH3tr2VBEMuw6mQVSql6SoP0bSJg5J8m5ubKrD4Akb5i2yj5+:U+FQkxI2E5oPI0Kp5ubKX4S+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.cdxx
offline_id
LBxKKiegnAy53rpqH3Pj2j46vwldiEt9kqHSuMt1
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-iVcrVFVRqu 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: 0847ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 16 IoCs

resource	yara_rule
behavioral2/memory/4016-1-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4016-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4032-0-0x0000000004910000-0x0000000004A2B000-memory.dmp	family_djvu
behavioral2/memory/4016-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4016-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4016-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4936-36-0x0000000000400000-0x0000000000537000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	file.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4500	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-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\58b1247e-b89b-44ee-9eb4-235719ffcfba\\file.exe\" --AutoStart"	file.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
17	api.2ip.ua
3	api.2ip.ua
5	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4032 set thread context of 4016	4032	file.exe	38
PID 4544 set thread context of 4936	4544	file.exe	93

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
4016	file.exe
4016	file.exe
4936	file.exe
4936	file.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4032 wrote to memory of 4016	4032	file.exe	38
PID 4016 wrote to memory of 4500	4016	file.exe	90
PID 4016 wrote to memory of 4500	4016	file.exe	90
PID 4016 wrote to memory of 4500	4016	file.exe	90
PID 4016 wrote to memory of 4544	4016	file.exe	92
PID 4016 wrote to memory of 4544	4016	file.exe	92
PID 4016 wrote to memory of 4544	4016	file.exe	92
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93
PID 4544 wrote to memory of 4936	4544	file.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4016
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\58b1247e-b89b-44ee-9eb4-235719ffcfba" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4500
- - C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4544
  - - C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4936

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

Loading Replay Monitor...

Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 d7005273bab949c42fcc73eac7820c4c5f08df1e9095020cdb0e17fc9e282d50
MD5 73ce21ff1fb2989f6350ace9274ae9b5
SHA1 7db6c387eb8351f3e8e361d10224711c3477821e
SHA512 a43767a55a559a8bf51d5dcb9bc378167f63e15f571b6be35903048570d036fed2a3f6a37c91f469ee9808d245cdd875b9dad38556e6bf97258a82c7071aeab3
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 0c6fe140d4e226a13ada3e6fe23429e1fc83f46a681ad907f19f8b8ce38b0e38
MD5 8d699eccc391891118788b5140c392d7
SHA1 b746335bdc2f7cc722e4c60eb2209cd9fffcdcfa
SHA512 b00fcb838e80688687d802b4aaee77013b6980a6fbd20a3535813253d97603fd6a7e6373a5a38a991a4d0cb5b3fb5679f7c1f03fad4b0e4b1391902cb07ae49a
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 d0b33662c0cbf1a33a5d552cd92a42a69b48604d9cc1900d0720a235d027c7d5
MD5 e47a00c22ee8a74aeef59ac8230551d3
SHA1 5adb725d25f23de452800f3b0eca1c50673661e0
SHA512 1aabaf21b2fa7fd0f1a4245f0d72538e5c481b1acf6636c4f48c5916addbdb05264fd223c83e1add425b97c05c119f5354703455ca867c5cd1ae7ebdc8c32aca
MD5 SHA1 SHA512

Submit Download

file.exe

Path C:\Users\Admin\AppData\Local\58b1247e-b89b-44ee-9eb4-235719ffcfba\file.exe
Size 749KB
SHA256 56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
MD5 87ba288f14fbf826d4cf061d9f8e72ed
SHA1 ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA512 200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
SSDEEP 12288:lL++FQkxaH3tr2VBEMuw6mQVSql6SoP0bSJg5J8m5ubKrD4Akb5i2yj5+:U+FQkxI2E5oPI0Kp5ubKX4S+
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4016-3-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4016-15-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4016-2-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4016-1-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4016-4-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4032-0-0x0000000004910000-0x0000000004A2B000-memory.dmp

Download

memory/4936-19-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-20-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-18-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-25-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-26-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-31-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-33-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-34-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-35-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4936-36-0x0000000000400000-0x0000000000537000-memory.dmp

Download