djvu | c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 19:57

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General

Target
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Size 716KB
Sample240524-ypfmlshb6y
SHA256 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
MD5 2a02c81a9994f011090e174bb076ec9b
SHA1 50cf1a96d5e2945143b6fb3484b124d41349c77c
SHA512 d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
SSDEEP 12288:0k0wJoEANTCwX67nsbdxnZF2+9R32y1Cbd8n34rtzjg1S0lWEKm:0kVCGwX6LsbS+9Uy1CxCwtQkeKm
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
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: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/4744-2-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3640-4-0x00000000049C0000-0x0000000004ADB000-memory.dmp	family_djvu
behavioral2/memory/4744-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4744-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2984-37-0x0000000000400000-0x0000000000537000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3112	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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fb0df9a1-c349-4e54-8e40-5529a6f57e6b\\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe\" --AutoStart"	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.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
4	api.2ip.ua
15	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3640 set thread context of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 1860 set thread context of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89

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
4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
2984	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
2984	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 3640 wrote to memory of 4744	3640	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	82
PID 4744 wrote to memory of 3112	4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	86
PID 4744 wrote to memory of 3112	4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	86
PID 4744 wrote to memory of 3112	4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	86
PID 4744 wrote to memory of 1860	4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	87
PID 4744 wrote to memory of 1860	4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	87
PID 4744 wrote to memory of 1860	4744	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	87
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89
PID 1860 wrote to memory of 2984	1860	c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe	89

C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3640
- C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
  "C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4744
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\fb0df9a1-c349-4e54-8e40-5529a6f57e6b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3112
- - C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
    "C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1860
  - - C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
      "C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2984

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 42397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00
MD5 7bb5a14437331aad24915a3d8546fbc1
SHA1 9a5570c07af0c0cde02858f61e1c7094f5a70f38
SHA512 a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13
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 53e17f465dc264a96eb463e62a7a2aa0cfe012eefc2db713ae0c83cf4303d912
MD5 00f7077ed8eb805c49e071b02375d57c
SHA1 852de83cebb4d018349a654ce024840f106d9290
SHA512 ea33c8a46141f765c8ef6efe14104e79e8ed74a47700aa7891e1cb1d923e79cffd070b49e522c03360117ff2d73826b4bec8a737bdd48d285a7c15aeb1285165
MD5 SHA1 SHA512

Submit Download

CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 93b178cded5cf230ffd3e2de1308d4c1aa2cc79e1b3f17cf6831696266886525
MD5 f4704a7a244d25a43fd98dc8d42bac59
SHA1 85e0a36f70bcd2ac3ff57b8665a40f8678de5db6
SHA512 15231d0d0c48699fd820db4ae9015314be728d89a911a6f5369a3a506167aed3b4ab1314fca2954444cc6ced973ce830a16a1ab82ccf1b7e34c3c7e90c3fe72a
MD5 SHA1 SHA512

Submit Download

c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe

Path C:\Users\Admin\AppData\Local\fb0df9a1-c349-4e54-8e40-5529a6f57e6b\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Size 716KB
SHA256 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
MD5 2a02c81a9994f011090e174bb076ec9b
SHA1 50cf1a96d5e2945143b6fb3484b124d41349c77c
SHA512 d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
SSDEEP 12288:0k0wJoEANTCwX67nsbdxnZF2+9R32y1Cbd8n34rtzjg1S0lWEKm:0kVCGwX6LsbS+9Uy1CxCwtQkeKm
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2984-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-36-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-32-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2984-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3640-1-0x0000000004920000-0x00000000049BC000-memory.dmp

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memory/3640-4-0x00000000049C0000-0x0000000004ADB000-memory.dmp

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memory/4744-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-2-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4744-19-0x0000000000400000-0x0000000000537000-memory.dmp

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