Resubmissions

16-05-2023 22:17

230516-17se8sch28 7

12-04-2021 12:47

210412-vkz15xeqjj 10

General

  • Target

    Setup3310.exe

  • Size

    381KB

  • Sample

    210412-vkz15xeqjj

  • MD5

    9b6051646052a21c4002dcd1bb973134

  • SHA1

    a671b61746a7e6032f253008106d1b84cebca943

  • SHA256

    b2b39d32315cb31d5799c2aa038fdbd3f973eac21ae210ad2bee07af130e7a81

  • SHA512

    59995b1a08324362444469b0cc4f8cb87e2a83ccf189c9c7fb3574576d55fa10d4ef72c3459bce38d427c7450a825cfa682b7f524aaa71dcd7343948ae306440

Malware Config

Targets

    • Target

      Setup3310.exe

    • Size

      381KB

    • MD5

      9b6051646052a21c4002dcd1bb973134

    • SHA1

      a671b61746a7e6032f253008106d1b84cebca943

    • SHA256

      b2b39d32315cb31d5799c2aa038fdbd3f973eac21ae210ad2bee07af130e7a81

    • SHA512

      59995b1a08324362444469b0cc4f8cb87e2a83ccf189c9c7fb3574576d55fa10d4ef72c3459bce38d427c7450a825cfa682b7f524aaa71dcd7343948ae306440

    • ElysiumStealer

      ElysiumStealer (previously known as ZeromaxStealer) is an info stealer that can steal login credentials for various accounts.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • redline

      redline_Stealer.

    • Checks for common network interception software

      Looks in the registry for tools like Wireshark or Fiddler commonly used to analyze network activity.

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

    • Drops file in Drivers directory

    • Executes dropped EXE

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • VMProtect packed file

      Detects executables packed with VMProtect commercial packer.

    • 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.

    • Loads dropped DLL

    • Reads local data of messenger clients

      Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

    • 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 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.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

4
T1081

Discovery

Software Discovery

1
T1518

Query Registry

6
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Remote System Discovery

1
T1018

Collection

Data from Local System

4
T1005

Command and Control

Web Service

1
T1102

Tasks