General

  • Target

    PesmobileGen.exe

  • Size

    231KB

  • Sample

    241225-vfmg1szkfr

  • MD5

    f55b6dd676bb7064d38a1eaac5b08f69

  • SHA1

    f772349cd296f12d6399fc613c0c898696ac89a7

  • SHA256

    1563b6bc82b3606302ccfc90be5068858eaa4d7a9544fe67b2500228c707c992

  • SHA512

    251ddb5bcb67ae9e3699c237e49452afcc7335e12eae14fb2b5834b847fec3be980ba9c05f1568dad35e84245f157c9a67ee7b5551e7bfbeb6b1ea086966851f

  • SSDEEP

    6144:xloZM+rIkd8g+EtXHkv/iD4EMzNkqNlOQLWU1pAzg3b8e1mei:DoZdL+EP8EMzNkqNlOQLWU1pAzmM

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1270898251733663956/OPCvnSMz3KDXfn-5gLMn3HMcpLRLBKkmzt_nkzdAVMIJcY9H3pH5QSVD78gS0dTnsswq

Targets

    • Target

      PesmobileGen.exe

    • Size

      231KB

    • MD5

      f55b6dd676bb7064d38a1eaac5b08f69

    • SHA1

      f772349cd296f12d6399fc613c0c898696ac89a7

    • SHA256

      1563b6bc82b3606302ccfc90be5068858eaa4d7a9544fe67b2500228c707c992

    • SHA512

      251ddb5bcb67ae9e3699c237e49452afcc7335e12eae14fb2b5834b847fec3be980ba9c05f1568dad35e84245f157c9a67ee7b5551e7bfbeb6b1ea086966851f

    • SSDEEP

      6144:xloZM+rIkd8g+EtXHkv/iD4EMzNkqNlOQLWU1pAzg3b8e1mei:DoZdL+EP8EMzNkqNlOQLWU1pAzmM

    • Detect Umbral payload

    • Umbral

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

    • Umbral family

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • 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