General

  • Target

    keygen-step-4.exe

  • Size

    6.3MB

  • Sample

    210306-btpn6kk5xa

  • MD5

    5f6a71ec27ed36a11d17e0989ffb0382

  • SHA1

    a66b0e4d8ba90fc97e4d5eb37d7fbc12ade9a556

  • SHA256

    a546a1f257585e2f4c093db2b7eeb6413a314ffb1296d97fd31d0363e827cc65

  • SHA512

    d67e0f1627e5416aef1185aea2125c8502aac02b6d3e8eec301e344f5074bfce8b2aded37b2730a65c04b95b1ba6151e79048642ef1d0c9b32702f919b42f7b4

Malware Config

Targets

    • Target

      keygen-step-4.exe

    • Size

      6.3MB

    • MD5

      5f6a71ec27ed36a11d17e0989ffb0382

    • SHA1

      a66b0e4d8ba90fc97e4d5eb37d7fbc12ade9a556

    • SHA256

      a546a1f257585e2f4c093db2b7eeb6413a314ffb1296d97fd31d0363e827cc65

    • SHA512

      d67e0f1627e5416aef1185aea2125c8502aac02b6d3e8eec301e344f5074bfce8b2aded37b2730a65c04b95b1ba6151e79048642ef1d0c9b32702f919b42f7b4

    • ElysiumStealer

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

    • ElysiumStealer Payload

    • ElysiumStealer Support DLL

    • PlugX

      PlugX is a RAT (Remote Access Trojan) that has been around since 2008.

    • RedLine

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

    • RedLine Payload

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • 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)

    • Nirsoft

    • XMRig Miner Payload

    • Executes dropped EXE

    • Suspicious Office macro

      Office document equipped with 4.0 macros.

    • Checks BIOS information in registry

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

    • Drops startup file

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • themida

      Detects Themida, Advanced Windows software protection system.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • 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

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • 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.

    • Maps connected drives based on registry

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

    • Writes to the Master Boot Record (MBR)

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

    • 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

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

2
T1081

Discovery

Software Discovery

1
T1518

Query Registry

8
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

8
T1082

Security Software Discovery

1
T1063

Peripheral Device Discovery

3
T1120

Remote System Discovery

1
T1018

Collection

Data from Local System

2
T1005

Command and Control

Web Service

1
T1102

Tasks