General

  • Target

    c4331fb601660c4f12eb88f65860073eeeff26180b0503c76bf4f09c9be00cb3

  • Size

    128KB

  • Sample

    220927-d3q1aacdd3

  • MD5

    caf90b90ca4ec920b34eccab3bb0c103

  • SHA1

    dc2728e0de44262da60491d47f7698227da9a477

  • SHA256

    c4331fb601660c4f12eb88f65860073eeeff26180b0503c76bf4f09c9be00cb3

  • SHA512

    dfaf8fd4c954f4d8a5dc0ff8ee4cb821ef47d635678002891ca568bff04bae03a802a6aa2271d773073a4d13de48feac93f7868e60cb2711d9e5b9195fd649e1

Malware Config

Extracted

Family

djvu

C2

http://winnlinne.com/lancer/get.php

Attributes
extension
.ofww
offline_id
xkNzhkB1wvgoDI7Uo0HPNLY3qCuwoFpP7nlhlut1
payload_url
http://rgyui.top/dl/build2.exe
http://winnlinne.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Extracted

Family

vidar

Version

54.6

Botnet

517

C2

https://t.me/huobiinside

https://mas.to/@kyriazhs1975

Attributes
profile_id
517

Extracted

Family

redline

Botnet

11

C2

77.73.134.27:7161

Attributes
auth_value
e6aadafed1fda7723d7655a5894828d2

Extracted

Family

redline

Botnet

install

C2

212.8.244.233:43690

Attributes
auth_value
cbce7277fef2185d93b8332df3940ad5

Targets

    • Target

      c4331fb601660c4f12eb88f65860073eeeff26180b0503c76bf4f09c9be00cb3

    • Size

      128KB

    • MD5

      caf90b90ca4ec920b34eccab3bb0c103

    • SHA1

      dc2728e0de44262da60491d47f7698227da9a477

    • SHA256

      c4331fb601660c4f12eb88f65860073eeeff26180b0503c76bf4f09c9be00cb3

    • SHA512

      dfaf8fd4c954f4d8a5dc0ff8ee4cb821ef47d635678002891ca568bff04bae03a802a6aa2271d773073a4d13de48feac93f7868e60cb2711d9e5b9195fd649e1

    • Detected Djvu ransomware

    • Detects Smokeloader packer

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • RedLine

      RedLine Stealer is a malware family written in C#, first appearing in early 2020.

    • RedLine payload

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses 2FA software files, possible credential harvesting

    • Accesses Microsoft Outlook profiles

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix

Command and Control

    Credential Access

    Execution

      Exfiltration

        Impact

          Initial Access

            Lateral Movement

              Privilege Escalation