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General

  • Target

    81423f5454208e958aa183c2850809620676485c63aab07d91a6f85c1d9b4e72

  • Size

    2.6MB

  • Sample

    250115-177j6aymfm

  • MD5

    4dedefe4431f91c920d9aaaceb99e2ee

  • SHA1

    9a20559fa8a3e670c734837de16fa508d5e25b41

  • SHA256

    81423f5454208e958aa183c2850809620676485c63aab07d91a6f85c1d9b4e72

  • SHA512

    cb7d2fe42cd44f7b1c31102961c579d7ba5a6e8f5071dfdb372dade85f56572dd870f54ca32b160faa58536f0f40e4ceb39745ae076fb8d546dd358ebe96f086

  • SSDEEP

    49152:wgwReifu1DBgutBPN4gJEkSBz4aPUAigHrBYlHYw/s5CH5Ie71yAmiESeJKeqy:wgwRevguPPjg946UAFLBEYw/s5CX7tmj

Malware Config

Targets

    • Target

      81423f5454208e958aa183c2850809620676485c63aab07d91a6f85c1d9b4e72

    • Size

      2.6MB

    • MD5

      4dedefe4431f91c920d9aaaceb99e2ee

    • SHA1

      9a20559fa8a3e670c734837de16fa508d5e25b41

    • SHA256

      81423f5454208e958aa183c2850809620676485c63aab07d91a6f85c1d9b4e72

    • SHA512

      cb7d2fe42cd44f7b1c31102961c579d7ba5a6e8f5071dfdb372dade85f56572dd870f54ca32b160faa58536f0f40e4ceb39745ae076fb8d546dd358ebe96f086

    • SSDEEP

      49152:wgwReifu1DBgutBPN4gJEkSBz4aPUAigHrBYlHYw/s5CH5Ie71yAmiESeJKeqy:wgwRevguPPjg946UAFLBEYw/s5CX7tmj

    • Detects Mimic ransomware

    • Mimic

      Ransomware family was first exploited in the wild in 2022.

    • Mimic family

    • Modifies security service

    • UAC bypass

    • Modifies boot configuration data using bcdedit

    • Renames multiple (6327) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Deletes System State backups

      Uses wbadmin.exe to inhibit system recovery.

    • Event Triggered Execution: Image File Execution Options Injection

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Enumerates connected drives

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

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks