Resubmissions

02-09-2022 02:49

220902-dbgmjafabp 10

02-09-2022 02:36

220902-c3scnshbc7 10

12-08-2022 07:02

220812-httr2aceh7 10

General

  • Target

    csrss.exe

  • Size

    4.5MB

  • Sample

    220902-c3scnshbc7

  • MD5

    2f29ebdaf7b3395ebdadb13f453177c7

  • SHA1

    20913d2d3c145adf43af7f13108cd1eb974862ca

  • SHA256

    5d856f4c0a6a3d6a13cc4b0786328e49511923b3ca208d93010c8e6b122bc708

  • SHA512

    27c258f7f4f9add24666daadf62008bff00f224723623b0463a9d455254cfcbbbcda92488530dcb41a3fad0d688c15630e0d8eda3c6fce031db1a91fc9e03ce7

  • SSDEEP

    98304:477X24Nev1+NrGJ4FSBiD+Fon/wpCmreluztZi3:kX243NrGk+F+/wYmt

Malware Config

Extracted

Family

metasploit

Version

windows/single_exec

Targets

    • Target

      csrss.exe

    • Size

      4.5MB

    • MD5

      2f29ebdaf7b3395ebdadb13f453177c7

    • SHA1

      20913d2d3c145adf43af7f13108cd1eb974862ca

    • SHA256

      5d856f4c0a6a3d6a13cc4b0786328e49511923b3ca208d93010c8e6b122bc708

    • SHA512

      27c258f7f4f9add24666daadf62008bff00f224723623b0463a9d455254cfcbbbcda92488530dcb41a3fad0d688c15630e0d8eda3c6fce031db1a91fc9e03ce7

    • SSDEEP

      98304:477X24Nev1+NrGJ4FSBiD+Fon/wpCmreluztZi3:kX243NrGk+F+/wYmt

    • Glupteba

      Glupteba is a modular loader written in Golang with various components.

    • Glupteba payload

    • MetaSploit

      Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Windows security bypass

    • Creates a large amount of network flows

      This may indicate a network scan to discover remotely running services.

    • Modifies boot configuration data using bcdedit

    • Blocklisted process makes network request

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Possible attempt to disable PatchGuard

      Rootkits can use kernel patching to embed themselves in an operating system.

    • Stops running service(s)

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v6

Execution

Command-Line Interface

1
T1059

Scheduled Task

1
T1053

Persistence

Modify Existing Service

2
T1031

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Disabling Security Tools

2
T1089

Modify Registry

6
T1112

Impair Defenses

2
T1562

Install Root Certificate

1
T1130

Discovery

Network Service Scanning

1
T1046

Security Software Discovery

1
T1063

Query Registry

4
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Remote System Discovery

1
T1018

Command and Control

Web Service

1
T1102

Impact

Service Stop

1
T1489

Tasks