General

  • Target

    c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6.bin

  • Size

    669KB

  • Sample

    210808-btx57gx5rn

  • MD5

    2120cf93b6be39884f951ee2a31c5999

  • SHA1

    317b695da0ece90979f0400c2c7800e50bec8bb9

  • SHA256

    c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6

  • SHA512

    3038b27dcc263675a642f77d9dbaaff921c3a56f160051df44619dbafcd5d108db1c6caeacb70179c511e284035d329f29c34dd19500d2bd4006d2f86ee1dc33

Malware Config

Targets

    • Target

      c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6.bin

    • Size

      669KB

    • MD5

      2120cf93b6be39884f951ee2a31c5999

    • SHA1

      317b695da0ece90979f0400c2c7800e50bec8bb9

    • SHA256

      c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6

    • SHA512

      3038b27dcc263675a642f77d9dbaaff921c3a56f160051df44619dbafcd5d108db1c6caeacb70179c511e284035d329f29c34dd19500d2bd4006d2f86ee1dc33

    • MedusaLocker

      Ransomware with several variants first seen in September 2019.

    • MedusaLocker Payload

    • UAC bypass

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Executes dropped EXE

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Checks whether UAC is enabled

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

MITRE ATT&CK Matrix ATT&CK v6

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

File Deletion

2
T1107

Credential Access

Credentials in Files

1
T1081

Discovery

System Information Discovery

3
T1082

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

1
T1005

Impact

Inhibit System Recovery

2
T1490

Tasks