Resubmissions

03-12-2021 16:55

211203-vfgxjahafr 10

03-12-2021 16:38

211203-t5d2hacab9 10

General

  • Target

    sqlservr.exe.7z

  • Size

    3MB

  • Sample

    211203-vfgxjahafr

  • MD5

    0923d82afd72038a03dda84170b793bb

  • SHA1

    2ac02a4b0e0dc807e8e3328934d5007002b12514

  • SHA256

    3f5c16db3f1a5bb724288688d15038da32f1b89cbd662fddc9def8b8da2a84c1

  • SHA512

    515238347da2af77d82b4ac4be420d6c89b25dc836c3e13cdb02aee45380df374363bfd182aa84a26fac835ae7eb2241a4b2798b236b2e09721a7af55bcc1ff4

Malware Config

Targets

    • Target

      sqlservr.exe.7z

    • Size

      3MB

    • MD5

      0923d82afd72038a03dda84170b793bb

    • SHA1

      2ac02a4b0e0dc807e8e3328934d5007002b12514

    • SHA256

      3f5c16db3f1a5bb724288688d15038da32f1b89cbd662fddc9def8b8da2a84c1

    • SHA512

      515238347da2af77d82b4ac4be420d6c89b25dc836c3e13cdb02aee45380df374363bfd182aa84a26fac835ae7eb2241a4b2798b236b2e09721a7af55bcc1ff4

    • Registers COM server for autorun

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner Payload

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Sets file execution options in registry

    • Loads dropped DLL

    • 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

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

2
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Tasks