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General

  • Target

    Invoice.exe

  • Size

    974KB

  • Sample

    220901-kbvygscgd4

  • MD5

    288e1e9a0d79b265aaf409a1c39b67dd

  • SHA1

    daccc93545a168dcb69dd8b18ab01ca1f4a68cbc

  • SHA256

    95bb38f864cb2a18cc598ce238ef85dc5eae8de91c0f2e58c175460fc8ebe94d

  • SHA512

    1dedd914fdf8bb966525bb951a348a61ab91d1f1384fb035034eac07d331c09bc460f88cd9412c677998b9bf84a2b6e1d99f2c64e0b79a8a1976b11a9481641b

  • SSDEEP

    24576:jZ5hSCAlqmCXyvuDdGBGwZcZoyMgvN6QAJXY+mzo3bv:d5hStqmSycYGayMgl6QUlmzM

Malware Config

Extracted

Family

oski

C2

v.m-fit.biz

Targets

    • Target

      Invoice.exe

    • Size

      974KB

    • MD5

      288e1e9a0d79b265aaf409a1c39b67dd

    • SHA1

      daccc93545a168dcb69dd8b18ab01ca1f4a68cbc

    • SHA256

      95bb38f864cb2a18cc598ce238ef85dc5eae8de91c0f2e58c175460fc8ebe94d

    • SHA512

      1dedd914fdf8bb966525bb951a348a61ab91d1f1384fb035034eac07d331c09bc460f88cd9412c677998b9bf84a2b6e1d99f2c64e0b79a8a1976b11a9481641b

    • SSDEEP

      24576:jZ5hSCAlqmCXyvuDdGBGwZcZoyMgvN6QAJXY+mzo3bv:d5hStqmSycYGayMgl6QUlmzM

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks