General

  • Target

    51b18e70a20148aac8b4a7dcc35dc0fbea56f618c268c3263a73c2d7930f242c

  • Size

    3.1MB

  • Sample

    210926-yewwvafce3

  • MD5

    a8a946ab8b01f067b80e93ebaf1a6752

  • SHA1

    39322050bbd3ac2c8455bbe6a3495e48db505605

  • SHA256

    51b18e70a20148aac8b4a7dcc35dc0fbea56f618c268c3263a73c2d7930f242c

  • SHA512

    8b79073fff6f062454b6e2c00a2992b6d2204a71371eb9c6bd22072056c246ecbd4d17dd24e0bb929f626a02b9d9b1a96231c0abcf61af8799d36da7602517b5

Malware Config

Targets

    • Target

      51b18e70a20148aac8b4a7dcc35dc0fbea56f618c268c3263a73c2d7930f242c

    • Size

      3.1MB

    • MD5

      a8a946ab8b01f067b80e93ebaf1a6752

    • SHA1

      39322050bbd3ac2c8455bbe6a3495e48db505605

    • SHA256

      51b18e70a20148aac8b4a7dcc35dc0fbea56f618c268c3263a73c2d7930f242c

    • SHA512

      8b79073fff6f062454b6e2c00a2992b6d2204a71371eb9c6bd22072056c246ecbd4d17dd24e0bb929f626a02b9d9b1a96231c0abcf61af8799d36da7602517b5

    • xmrig

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

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

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks BIOS information in registry

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

    • 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 cryptocurrency files/wallets, possible credential harvesting

    • 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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Collection

Data from Local System

2
T1005

Tasks