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General

  • Target

    829fb38be0b18e34559c55621008881b6a1b351f48fcdbc04624cc653e7c7222

  • Size

    230KB

  • Sample

    250122-evhvdayldr

  • MD5

    c1f2ad8d6163d06adab04c985b8d5e2c

  • SHA1

    2ff7f7a1feb743fccb19cd64611322a4facb1a8a

  • SHA256

    829fb38be0b18e34559c55621008881b6a1b351f48fcdbc04624cc653e7c7222

  • SHA512

    ffb31ff8fba0668aaec44cd0c64519265cb7be7a758268dae067927a92e7f1589b1b3a0d3147264f699684c04a71236daa80e5ade2caf7e4ac5affe334870cfb

  • SSDEEP

    6144:VloZM+rIkd8g+EtXHkv/iD4l3RLJX8Qf0+nJUg1zjb8e1mC1Ni:3oZtL+EP8l3RLJX8Qf0+nJUg1zZE

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1330136291467198504/z4TJmlqFrtMxFwlpKFihKwDbDGhZT1qsCllMCDcaIgfd02TNv5UbR1vAyt5neO55hFG1

Targets

    • Target

      829fb38be0b18e34559c55621008881b6a1b351f48fcdbc04624cc653e7c7222

    • Size

      230KB

    • MD5

      c1f2ad8d6163d06adab04c985b8d5e2c

    • SHA1

      2ff7f7a1feb743fccb19cd64611322a4facb1a8a

    • SHA256

      829fb38be0b18e34559c55621008881b6a1b351f48fcdbc04624cc653e7c7222

    • SHA512

      ffb31ff8fba0668aaec44cd0c64519265cb7be7a758268dae067927a92e7f1589b1b3a0d3147264f699684c04a71236daa80e5ade2caf7e4ac5affe334870cfb

    • SSDEEP

      6144:VloZM+rIkd8g+EtXHkv/iD4l3RLJX8Qf0+nJUg1zjb8e1mC1Ni:3oZtL+EP8l3RLJX8Qf0+nJUg1zZE

    • 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

    • Deletes itself

    • Reads user/profile data of web browsers

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

    • 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 v15

Tasks