djvu | 01eb4565a8e660b3358e83aceecf578c24426654861b2c7bf6a2d5348cb55839

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 01:00

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General

Target
2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
Size 762KB
Sample240426-bcy7vsgf57
SHA256 2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2
MD5 03cea6f6022a3a08d1ea003091a3e502
SHA1 643e34573258d1511921c8d97a5b3c26d6c70b62
SHA512 560ec4d84a74b9089d12a6e00b02acb8fa1364f75172a2fd0916c030350ff9fe32ea137a3fdd8df3648870c82935131fdee9de6d00066d97f9d073cf85648e42
SSDEEP 12288:e2ZPFVL/YNfMNwpo4id34UcFg522Af3mhQIDBYHJD9wICzXXRXGoKU:e2tcMNqo3/c+52TvsQ0CjCdKU
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/3040-2-0x0000000005F20000-0x000000000603B000-memory.dmp	family_djvu
behavioral2/memory/1052-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5556-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1052-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5556-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/5556-25-0x0000000000400000-0x0000000000537000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1080	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e248b6bc-f628-45b2-b245-b25daf1f2ec1\\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe\" --AutoStart"	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe

Looks up external IP address via web service 2 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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3040 set thread context of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 4548 set thread context of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5320	5556	WerFault.exe	95

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 3040 wrote to memory of 1052	3040	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	91
PID 1052 wrote to memory of 1080	1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	92
PID 1052 wrote to memory of 1080	1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	92
PID 1052 wrote to memory of 1080	1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	92
PID 1052 wrote to memory of 4548	1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	93
PID 1052 wrote to memory of 4548	1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	93
PID 1052 wrote to memory of 4548	1052	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	93
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95
PID 4548 wrote to memory of 5556	4548	2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe	95

C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
"C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
  "C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1052
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e248b6bc-f628-45b2-b245-b25daf1f2ec1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1080
- - C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
    "C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4548
  - - C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
      "C:\Users\Admin\AppData\Local\Temp\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:5556
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5556 -s 568
        5⤵
        Program crash
        
        PID:5320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5556 -ip 5556
1⤵
PID:5340

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4472 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
1⤵
PID:2168

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

2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe

Path C:\Users\Admin\AppData\Local\e248b6bc-f628-45b2-b245-b25daf1f2ec1\2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2.exe
Size 762KB
SHA256 2f48e39c1fa623b569c7580066026dc25e629fcd4a9cdb8a58d22e45c9eb99c2
MD5 03cea6f6022a3a08d1ea003091a3e502
SHA1 643e34573258d1511921c8d97a5b3c26d6c70b62
SHA512 560ec4d84a74b9089d12a6e00b02acb8fa1364f75172a2fd0916c030350ff9fe32ea137a3fdd8df3648870c82935131fdee9de6d00066d97f9d073cf85648e42
SSDEEP 12288:e2ZPFVL/YNfMNwpo4id34UcFg522Af3mhQIDBYHJD9wICzXXRXGoKU:e2tcMNqo3/c+52TvsQ0CjCdKU
MD5 SHA1 SHA512 SSDEEP

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memory/1052-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1052-21-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3040-1-0x00000000046D0000-0x0000000004771000-memory.dmp

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memory/3040-2-0x0000000005F20000-0x000000000603B000-memory.dmp

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memory/4548-18-0x00000000045D0000-0x0000000004666000-memory.dmp

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memory/5556-20-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5556-23-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/5556-25-0x0000000000400000-0x0000000000537000-memory.dmp

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