General

  • Target

    Zeqenylvg.exe

  • Size

    271KB

  • Sample

    210419-m436xaxdrj

  • MD5

    d20d0d39b52c812da0ae519d68aa889b

  • SHA1

    0ce65d8119d415a5df76080625097acfb1359514

  • SHA256

    5069de588ac1f23d1cfa14c3ee61e5bc351d0314a5bbac248a5210a9db7e5a8c

  • SHA512

    9c4048f382c833cd1c296ead42dde9d0f5dc6d818eef04eee30d150a641a8e9b1934eb89ba3cc650060b9efb03760f9df1d7dd82227f3f42fa0d8efdf9ec5bd0

Malware Config

Extracted

Family

oski

C2

45.144.225.201

Targets

    • Target

      Zeqenylvg.exe

    • Size

      271KB

    • MD5

      d20d0d39b52c812da0ae519d68aa889b

    • SHA1

      0ce65d8119d415a5df76080625097acfb1359514

    • SHA256

      5069de588ac1f23d1cfa14c3ee61e5bc351d0314a5bbac248a5210a9db7e5a8c

    • SHA512

      9c4048f382c833cd1c296ead42dde9d0f5dc6d818eef04eee30d150a641a8e9b1934eb89ba3cc650060b9efb03760f9df1d7dd82227f3f42fa0d8efdf9ec5bd0

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • 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

    • Adds Run key to start application

    • 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 Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

2
T1005

Tasks