General

  • Target

    23447924C121DB2AFAE1DC223CEDA7DE.exe

  • Size

    200KB

  • Sample

    210731-h9c4jrq5yx

  • MD5

    23447924c121db2afae1dc223ceda7de

  • SHA1

    957015a79f07d2b25dbd874d3fd1788d147b0adb

  • SHA256

    e5cfbeb6e53527b724d1a710c44dd7f86a0befadb35db2c81ee1ec9aafd12b40

  • SHA512

    9167c1af1a43daf0af42a34eb15df0fad856ac43d68d0d01343c44fc4e33ac8bda5d840eb123a4f33e85833e739c8ce17cd93bbc9144b9ea96384a8cc0583540

Malware Config

Extracted

Family

oski

C2

103.99.1.60/we/shu/

Targets

    • Target

      23447924C121DB2AFAE1DC223CEDA7DE.exe

    • Size

      200KB

    • MD5

      23447924c121db2afae1dc223ceda7de

    • SHA1

      957015a79f07d2b25dbd874d3fd1788d147b0adb

    • SHA256

      e5cfbeb6e53527b724d1a710c44dd7f86a0befadb35db2c81ee1ec9aafd12b40

    • SHA512

      9167c1af1a43daf0af42a34eb15df0fad856ac43d68d0d01343c44fc4e33ac8bda5d840eb123a4f33e85833e739c8ce17cd93bbc9144b9ea96384a8cc0583540

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    • Downloads MZ/PE file

    • 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.

MITRE ATT&CK Enterprise v6

Tasks