Resubmissions

25-06-2021 19:45

210625-cmgf1aab1n 7

17-01-2021 17:30

210117-n4cz8adhsx 10

17-01-2021 11:33

210117-rz9rm26xk2 10

General

  • Target

    sskiper.exe

  • Size

    1003KB

  • Sample

    210117-rz9rm26xk2

  • MD5

    e2fdc51a0bf265af0a167f894f59b09e

  • SHA1

    d0c01a7cca5210fa19e40d107c7affeb84846329

  • SHA256

    07011e03e6fe27ec91e1f45c308d1a63f35317ecd39ccd6438a216e5a5008eb9

  • SHA512

    d77708c8cc9d68cb93ad1da55a3dc8e344f8c931bdce7fc7801bf3ded57d7b365952da3fb5dfa998a52b59c1a8076208181d48e96774785f34e0be87807b37ad

Malware Config

Targets

    • Target

      sskiper.exe

    • Size

      1003KB

    • MD5

      e2fdc51a0bf265af0a167f894f59b09e

    • SHA1

      d0c01a7cca5210fa19e40d107c7affeb84846329

    • SHA256

      07011e03e6fe27ec91e1f45c308d1a63f35317ecd39ccd6438a216e5a5008eb9

    • SHA512

      d77708c8cc9d68cb93ad1da55a3dc8e344f8c931bdce7fc7801bf3ded57d7b365952da3fb5dfa998a52b59c1a8076208181d48e96774785f34e0be87807b37ad

    • Modifies WinLogon for persistence

    • RedLine

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

    • RedLine Payload

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

    • Looks for VirtualBox Guest Additions in registry

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

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

    • Deletes itself

    • 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.

    • 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

    • Maps connected drives based on registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks