General

  • Target

    S89Rydaw2q.exe.7z

  • Size

    23.1MB

  • Sample

    230124-ynv1xafb3w

  • MD5

    43ac46dfb2115539e122812af99c6d77

  • SHA1

    326c97a330abbc4021341830c8cd5bc1f48d40b9

  • SHA256

    14e81b55d1231669dfa1096257b4f9d3557480de44469f9ce37010220bf6676d

  • SHA512

    7c6561c028f3fd2b422b3db90f0640583e5d82e12eaf33a9c76179cb23abfc0cfc660c38484682f2698be65cf34afc29fea24ec5cb28be17c598200021affa04

  • SSDEEP

    393216:w4D+A2c0xx0obZMx0l6M9FkSlN3Wwp5bApTwuitkY72gwct3kp176433GRhMew6l:ws+A2c0xbyyl6MQ4NJFtk22PcKD73IhX

Malware Config

Targets

    • Target

      S89Rydaw2q.exe

    • Size

      23.2MB

    • MD5

      0c952979e2d76f8ec17ff34a8023b82b

    • SHA1

      7406c03065315f5dd6d84e9443c2f0e92a666c0a

    • SHA256

      615beea238930be9e92faf8e7394d59d65000beb9728bb8b38f6b31c83e435e8

    • SHA512

      6f6cb2e2606602a74a554b610c4baeb0fb6fe8b310429be330e08e6f1102ea95f36fc80fd981402e40fef652a1da5909eeb154cd4dcbd841bdbf9a0a1834278b

    • SSDEEP

      393216:RXZVmGOIszfE1/giQkQJ/y2OFsaetMhSEiCjjngIlGZi4zym8nmjKAO9wV3ajcv1:NOm/giQP/yWaeiSEikjnRYjzMmW99IFP

    • Modifies Windows Defender notification settings

    • UAC bypass

    • Windows security bypass

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Disables use of System Restore points

    • Executes dropped EXE

    • Possible privilege escalation attempt

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • Drops startup file

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

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

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Modify Existing Service

1
T1031

Hidden Files and Directories

2
T1158

Scheduled Task

1
T1053

Privilege Escalation

Bypass User Account Control

1
T1088

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

3
T1112

Disabling Security Tools

3
T1089

Bypass User Account Control

1
T1088

File Deletion

2
T1107

Hidden Files and Directories

2
T1158

File Permissions Modification

1
T1222

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Impact

Inhibit System Recovery

3
T1490

Tasks