Resubmissions

28-02-2021 15:01

210228-5dd8sx9g26 10

28-02-2021 07:28

210228-xfflmbv19n 10

General

  • Target

    cc53accc69b32c2507210ea70d1d56aa84dbe354a7f79577df180179ea797427

  • Size

    6.2MB

  • Sample

    210228-5dd8sx9g26

  • MD5

    bd64d2e0d11093bbd84be2b6ca1c113d

  • SHA1

    8fae8984391bd9dddb7afc0ebdd87a05954a7134

  • SHA256

    cc53accc69b32c2507210ea70d1d56aa84dbe354a7f79577df180179ea797427

  • SHA512

    b2ebe1a566c9a22fa34795b5906721242a005b69cb1301ef6817ce31c45b9ca9da0e9b85c2973fe27a5910077c909469c91bf8a32bc8d370fdd84ce00415e3ad

Malware Config

Targets

    • Target

      cc53accc69b32c2507210ea70d1d56aa84dbe354a7f79577df180179ea797427

    • Size

      6.2MB

    • MD5

      bd64d2e0d11093bbd84be2b6ca1c113d

    • SHA1

      8fae8984391bd9dddb7afc0ebdd87a05954a7134

    • SHA256

      cc53accc69b32c2507210ea70d1d56aa84dbe354a7f79577df180179ea797427

    • SHA512

      b2ebe1a566c9a22fa34795b5906721242a005b69cb1301ef6817ce31c45b9ca9da0e9b85c2973fe27a5910077c909469c91bf8a32bc8d370fdd84ce00415e3ad

    • xmrig

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

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

    • XMRig Miner Payload

    • Executes dropped EXE

    • 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

    • Modifies file permissions

    • 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

    • Checks whether UAC is enabled

    • 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 NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Hidden Files and Directories

1
T1158

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

File Permissions Modification

1
T1222

Hidden Files and Directories

1
T1158

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Collection

Data from Local System

2
T1005

Tasks