General

  • Target

    PO @.doc

  • Size

    47KB

  • Sample

    211104-tcr3naghg9

  • MD5

    169678fe0845f2446d51c9e29040f8ac

  • SHA1

    c421f01a1fdcd8814aa7cb184e9fddb254739eb0

  • SHA256

    5fa094704ebfe389f1ade0b840e32b7034791317f8c692d19926a59da58af2eb

  • SHA512

    3215ba22d8c8341b9aa2a42897b8900b154928c93248cfcb095b4f7347965c83db115412e39e9e203436e1068c5a8ba3368bc5c0c386e99be89997e0bb429a0a

Malware Config

Extracted

Family

oski

C2

secureconnection.xyz

Targets

    • Target

      PO @.doc

    • Size

      47KB

    • MD5

      169678fe0845f2446d51c9e29040f8ac

    • SHA1

      c421f01a1fdcd8814aa7cb184e9fddb254739eb0

    • SHA256

      5fa094704ebfe389f1ade0b840e32b7034791317f8c692d19926a59da58af2eb

    • SHA512

      3215ba22d8c8341b9aa2a42897b8900b154928c93248cfcb095b4f7347965c83db115412e39e9e203436e1068c5a8ba3368bc5c0c386e99be89997e0bb429a0a

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • 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 Matrix ATT&CK v6

Execution

Exploitation for Client Execution

1
T1203

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