General

  • Target

    757F9B45EE33980B07406AEF416BF25C.exe

  • Size

    465KB

  • Sample

    230120-xn7h9sbc2v

  • MD5

    757f9b45ee33980b07406aef416bf25c

  • SHA1

    f950bd2804f25122dbd49e1c515567e5d151a134

  • SHA256

    f4d42993edb8d76c99b92ae963656adde31f57336032bd351163ae2322475eca

  • SHA512

    1a48d5d530660a1cf1b744e670861e7c7ce69d251f8ba2d48ad16617c6ff8bb144b8015e36028b9f57e9101b8fa4098005c151856be92948ed5c360f59458522

  • SSDEEP

    12288:yA/U/fxrZijLXWgPkzzzzzXy9nzzzzK4J9wzpCHzcHtR/uzn:yAcxmPkzzzzzXy9nzzzzK4J98pCHzuRe

Malware Config

Extracted

Family

oski

C2

anstransport.com

Targets

    • Target

      757F9B45EE33980B07406AEF416BF25C.exe

    • Size

      465KB

    • MD5

      757f9b45ee33980b07406aef416bf25c

    • SHA1

      f950bd2804f25122dbd49e1c515567e5d151a134

    • SHA256

      f4d42993edb8d76c99b92ae963656adde31f57336032bd351163ae2322475eca

    • SHA512

      1a48d5d530660a1cf1b744e670861e7c7ce69d251f8ba2d48ad16617c6ff8bb144b8015e36028b9f57e9101b8fa4098005c151856be92948ed5c360f59458522

    • SSDEEP

      12288:yA/U/fxrZijLXWgPkzzzzzXy9nzzzzK4J9wzpCHzcHtR/uzn:yAcxmPkzzzzzXy9nzzzzK4J98pCHzuRe

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks computer location settings

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

    • 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

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

2
T1005

Tasks