General

  • Target

    startup.exe

  • Size

    3.9MB

  • Sample

    230324-2bqgfabh5z

  • MD5

    e1825fc805a33dfa9c2801e769b42e10

  • SHA1

    404532b82eba283ea3b09468fc7010a70cb7d377

  • SHA256

    cefe5eb0a731e12ef6a1657b0627246c9c04db76d5f9ad532e181ef0ca1cd4fb

  • SHA512

    cb6d29f7c29b090230d64ba1998e14f669d5b58ecf79abe7c9f27839e0d2aa17123255ba4968383c0d77c8474461a313b98ec54bcffbfe2251068f40dc0efae4

  • SSDEEP

    98304:zQFKOoFJ9QennbKgb/ezPnz0KzsZGkNREdcbvmDH8U72ByrcGw:moFfQenzbGzPnIE0FDE6beDdKm

Malware Config

Targets

    • Target

      startup.exe

    • Size

      3.9MB

    • MD5

      e1825fc805a33dfa9c2801e769b42e10

    • SHA1

      404532b82eba283ea3b09468fc7010a70cb7d377

    • SHA256

      cefe5eb0a731e12ef6a1657b0627246c9c04db76d5f9ad532e181ef0ca1cd4fb

    • SHA512

      cb6d29f7c29b090230d64ba1998e14f669d5b58ecf79abe7c9f27839e0d2aa17123255ba4968383c0d77c8474461a313b98ec54bcffbfe2251068f40dc0efae4

    • SSDEEP

      98304:zQFKOoFJ9QennbKgb/ezPnz0KzsZGkNREdcbvmDH8U72ByrcGw:moFfQenzbGzPnIE0FDE6beDdKm

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • 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

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Discovery

Query Registry

8
T1012

System Information Discovery

9
T1082

Security Software Discovery

1
T1063

Peripheral Device Discovery

3
T1120

Command and Control

Web Service

1
T1102

Tasks