General

  • Target

    fb0cb1729427d65c1f277d176146e5452c8614e33cb0896a26af5fbb0ea3a886

  • Size

    727KB

  • Sample

    211016-anerxscddj

  • MD5

    f910255f4ace1b36d8ae4e4529da6754

  • SHA1

    650f4289e43c451095a9946c9391594e263c0fd5

  • SHA256

    fb0cb1729427d65c1f277d176146e5452c8614e33cb0896a26af5fbb0ea3a886

  • SHA512

    241a45ac29b430aa67c85591258022c5b00b6bb55247f51f7ffcb73be1276cf4bc8f4649ba668b6885cbbbfee8609fda788b63b1169c86200d633ff70451b6e5

Malware Config

Extracted

Family

vidar

Version

41.4

Botnet

1008

C2

https://mas.to/@sslam

Attributes
  • profile_id

    1008

Targets

    • Target

      fb0cb1729427d65c1f277d176146e5452c8614e33cb0896a26af5fbb0ea3a886

    • Size

      727KB

    • MD5

      f910255f4ace1b36d8ae4e4529da6754

    • SHA1

      650f4289e43c451095a9946c9391594e263c0fd5

    • SHA256

      fb0cb1729427d65c1f277d176146e5452c8614e33cb0896a26af5fbb0ea3a886

    • SHA512

      241a45ac29b430aa67c85591258022c5b00b6bb55247f51f7ffcb73be1276cf4bc8f4649ba668b6885cbbbfee8609fda788b63b1169c86200d633ff70451b6e5

    • ServHelper

      ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

      suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    • suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

      suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    • xmrig

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

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Vidar Stealer

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies RDP port number used by Windows

    • Sets DLL path for service in the registry

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Reads user/profile data of web browsers

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

    • Accesses 2FA software files, possible credential harvesting

    • 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.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Account Manipulation

1
T1098

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Remote Desktop Protocol

1
T1076

Collection

Data from Local System

3
T1005

Tasks