General

  • Target

    dsfResult.exe

  • Size

    2.3MB

  • Sample

    250411-ne7cgaxny8

  • MD5

    ca93060ae27c34849c7e65dc0da210fc

  • SHA1

    5c589772ee781c45d26b903a5555784ceb8e7e85

  • SHA256

    28163caef95204c2ab19d97d52978de33323d65196bd2056c6dc06e15f755eba

  • SHA512

    4f9831d35f73b5921d00d5f9693cd46491b692e49a9a30ea85e5710fa11be97f11107db748f25e304564de5a925494ed43eafd576f063f75af342f7809dd4d0e

  • SSDEEP

    49152:+4TW5myjkHicujBk84J8bOdiIMYvLl88d971/Ka1yn:+4y5LjkCNjBkN8KA7YvLld99lsn

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1360210646112665720/qXg1qF4JZ6j3Rqqts-_rZSbjGedO1RuAq7HLooe-TstGKKIib9a91A7sjYj3Xa-Dhtsc

Targets

    • Target

      dsfResult.exe

    • Size

      2.3MB

    • MD5

      ca93060ae27c34849c7e65dc0da210fc

    • SHA1

      5c589772ee781c45d26b903a5555784ceb8e7e85

    • SHA256

      28163caef95204c2ab19d97d52978de33323d65196bd2056c6dc06e15f755eba

    • SHA512

      4f9831d35f73b5921d00d5f9693cd46491b692e49a9a30ea85e5710fa11be97f11107db748f25e304564de5a925494ed43eafd576f063f75af342f7809dd4d0e

    • SSDEEP

      49152:+4TW5myjkHicujBk84J8bOdiIMYvLl88d971/Ka1yn:+4y5LjkCNjBkN8KA7YvLld99lsn

    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Umbral family

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Checks installed software on the system

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

    • 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

    • Looks up external IP address via web service

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

MITRE ATT&CK Enterprise v16

Tasks