General

  • Target

    455D2C547DCACC8B6794A3FA0CCCEAC9.exe

  • Size

    10.1MB

  • Sample

    210419-dl277naane

  • MD5

    455d2c547dcacc8b6794a3fa0ccceac9

  • SHA1

    6efbe33712bddc491f54d7e03d7626941b7bd397

  • SHA256

    6e8a0a30744ed0130a2b32997e03ba5c07339ddf22e76c7ca64882d5d3f8cc4f

  • SHA512

    a4354ce47ae24ec6bb656ad6b80b07335da392de8e7c1c007ebd9b50e42cb0d7714ddc06597d8bde44ebea1c189220d7f5d263de6937e30ccb31ac3e7473c013

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://raw.githubusercontent.com/swagkarna/Bypass-Tamper-Protection/main/NSudo.exe

Targets

    • Target

      455D2C547DCACC8B6794A3FA0CCCEAC9.exe

    • Size

      10.1MB

    • MD5

      455d2c547dcacc8b6794a3fa0ccceac9

    • SHA1

      6efbe33712bddc491f54d7e03d7626941b7bd397

    • SHA256

      6e8a0a30744ed0130a2b32997e03ba5c07339ddf22e76c7ca64882d5d3f8cc4f

    • SHA512

      a4354ce47ae24ec6bb656ad6b80b07335da392de8e7c1c007ebd9b50e42cb0d7714ddc06597d8bde44ebea1c189220d7f5d263de6937e30ccb31ac3e7473c013

    • ElysiumStealer

      ElysiumStealer (previously known as ZeromaxStealer) is an info stealer that can steal login credentials for various accounts.

    • Modifies Windows Defender Real-time Protection settings

    • Modifies security service

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Checks for common network interception software

      Looks in the registry for tools like Wireshark or Fiddler commonly used to analyze network activity.

    • Blocklisted process makes network request

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Possible privilege escalation attempt

    • Sets service image path in registry

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • VMProtect packed file

      Detects executables packed with VMProtect commercial packer.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Modifies file permissions

    • Reads local data of messenger clients

      Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

    • 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

    • 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.

    • Checks whether UAC is enabled

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

3
T1031

Registry Run Keys / Startup Folder

2
T1060

BITS Jobs

1
T1197

Defense Evasion

Modify Registry

6
T1112

Disabling Security Tools

1
T1089

File Permissions Modification

1
T1222

BITS Jobs

1
T1197

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

4
T1081

Discovery

Software Discovery

1
T1518

Query Registry

4
T1012

System Information Discovery

5
T1082

Security Software Discovery

1
T1063

Peripheral Device Discovery

1
T1120

Remote System Discovery

1
T1018

Collection

Data from Local System

4
T1005

Command and Control

Web Service

1
T1102

Tasks