General

  • Target

    file.exe

  • Size

    261KB

  • Sample

    231221-ygyhfsbfhl

  • MD5

    d0543990e88af04f28324659e85c8d21

  • SHA1

    af9af9c63959b3bcf95e85af80a5a6857d558f03

  • SHA256

    f97af272feea9ccbc92c81139db9254c5b3f8219e48a1e5242dee04dc3b57d4d

  • SHA512

    c164d402e6e8cf1bffe5c9fdf2b0624010773445e3f6618790179f70ba6d6cad36c1dddc7bf872d739596987d6ebca39da88e25dab8c4de06a5f92aadf2256d9

  • SSDEEP

    3072:2WbonLAISaHCUORahXgXyqyKPPJSzKsXmKutteaeRNs/dNYV2Bk:HbYLAxaHCUO8hwb9o9XmtQsFNs

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

Extracted

Family

smokeloader

Version

2020

C2

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32
rc4.i32

Extracted

Family

djvu

C2

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

Attributes
  • extension

    .loqw

  • offline_id

    NrqpaQRhQqq5l2tBPp1QS34I3ME2IKsAlZ0A9pt1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://zexeq.com/files/1/build3.exe

  • ransomnote

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rsa_pubkey.plain

Extracted

Family

redline

Botnet

@ytlogsbot

C2

185.172.128.33:38294

Extracted

Family

redline

Botnet

1222-55000

C2

193.233.132.72:36295

Targets

    • Target

      file.exe

    • Size

      261KB

    • MD5

      d0543990e88af04f28324659e85c8d21

    • SHA1

      af9af9c63959b3bcf95e85af80a5a6857d558f03

    • SHA256

      f97af272feea9ccbc92c81139db9254c5b3f8219e48a1e5242dee04dc3b57d4d

    • SHA512

      c164d402e6e8cf1bffe5c9fdf2b0624010773445e3f6618790179f70ba6d6cad36c1dddc7bf872d739596987d6ebca39da88e25dab8c4de06a5f92aadf2256d9

    • SSDEEP

      3072:2WbonLAISaHCUORahXgXyqyKPPJSzKsXmKutteaeRNs/dNYV2Bk:HbYLAxaHCUO8hwb9o9XmtQsFNs

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Detect ZGRat V1

    • Detected Djvu ransomware

    • Detected google phishing page

    • 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.

    • ZGRat

      ZGRat is remote access trojan written in C#.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Drops startup file

    • Executes dropped EXE

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • 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.

    • Checks whether UAC is enabled

    • 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.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

File and Directory Permissions Modification

1
T1222

Modify Registry

3
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Query Registry

7
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Process Discovery

1
T1057

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Command and Control

Web Service

1
T1102

Tasks