General

  • Target

    bda7463e881f4e14faadc83828e4fd6f.exe.vir

  • Size

    200KB

  • Sample

    230308-ev6lfade5w

  • MD5

    bda7463e881f4e14faadc83828e4fd6f

  • SHA1

    4518f0f4b69f2af95d373d09f35bac1f800a7bdf

  • SHA256

    56e6f4171172dff458498dea319ababfc8648a31c78df18b1c23d5189d059a8d

  • SHA512

    cb9838b7395c1f849fc6fe0f0f916d0cf105a93431d9d16fec8f8cf0ec0a05a7ec7c72fb3bc9af5ba4a2aeaaa1dda5f973cce2501094be007feae883ee8c7428

  • SSDEEP

    3072:WfUomEuYm98dlSq7gt5q7Dx+XgS6aCEwhOfUbCalNT2pbB3fI21Xi6FLPo3c:WfUauY68uSWCx+XA7mg2pN71Ljo3c

Malware Config

Extracted

Family

oski

C2

jimmy.axfree.com

Targets

    • Target

      bda7463e881f4e14faadc83828e4fd6f.exe.vir

    • Size

      200KB

    • MD5

      bda7463e881f4e14faadc83828e4fd6f

    • SHA1

      4518f0f4b69f2af95d373d09f35bac1f800a7bdf

    • SHA256

      56e6f4171172dff458498dea319ababfc8648a31c78df18b1c23d5189d059a8d

    • SHA512

      cb9838b7395c1f849fc6fe0f0f916d0cf105a93431d9d16fec8f8cf0ec0a05a7ec7c72fb3bc9af5ba4a2aeaaa1dda5f973cce2501094be007feae883ee8c7428

    • SSDEEP

      3072:WfUomEuYm98dlSq7gt5q7Dx+XgS6aCEwhOfUbCalNT2pbB3fI21Xi6FLPo3c:WfUauY68uSWCx+XA7mg2pN71Ljo3c

    • 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.

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

2
T1005

Tasks