General

  • Target

    4519749248385024.zip

  • Size

    4.6MB

  • Sample

    210408-ybt87zq8ke

  • MD5

    86937696590b8f5316bc580f57514239

  • SHA1

    12b889c195633c8f83edc8c2d7de68dc0aa05ab0

  • SHA256

    b5086a758d463bce597c5bd5c6f23707e82f3a19f9ac96b4c9e1935bb00134b9

  • SHA512

    ce9fc8343cd08c1da922db32c9f9c85dafa1e540605c3ee2fd98425f2120dd95f35f10e3bb78254f5d942cb951308c307dd9177b5469d25aa394386b94b6fbd9

Malware Config

Targets

    • Target

      b308cb2b9e0c87edfca66e3b337f4efbecefbd2ece7a52f8a0708da0934322fc

    • Size

      4.7MB

    • MD5

      aec88dc0fce9bab66fc9c31b30af950d

    • SHA1

      476e270fd4e4c7df0d0d3d744b8440d4b7bc2641

    • SHA256

      b308cb2b9e0c87edfca66e3b337f4efbecefbd2ece7a52f8a0708da0934322fc

    • SHA512

      235702f1077e47cbeca8373340fd1291bca84d2c34c99eee5f39f331eaaab29bc0b7f91797ba70528f155fa8366562b21c776d3c2ef8085947a6a026915f55e7

    • CryptBot

      A C++ stealer distributed widely in bundle with other software.

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

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks BIOS information in registry

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

    • Drops startup file

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • 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.

    • 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.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v6

Tasks