Overview

overview

10

Static

static

3

test.exe

windows7-x64

8

test.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    test.exe

  • Size

    187KB

  • Sample

    240809-m8c52stepb

  • MD5

    d6d75d536a2cff983197d333d0230a05

  • SHA1

    cb3872741f661e1f483f7719619ec5c14db15e66

  • SHA256

    cc13206ad514d61c7ea83f9380a571b93e23faafa829b04e877fcd38b4e83b75

  • SHA512

    1219ebdf6ffe7aad099b4af6b9d837acb8183f671736af0bc627fceb18ce69ae9301167afc56277cf20ec7c9fd9f8d537f755bad8fa33c84c8579499a4489c26

  • SSDEEP

    3072:wSV3J6kkt5h1X+HqTi0BW69hd1MMdxPe9N9uA0/+hL9TBfnPE6g0UasVmkoYcMKV:wHt5hBPi0BW69hd1MMdxPe9N9uA069Tx

Score
10/10
umbralcredential_accessdiscoverydropperexecutionexploitransomwarestealer

Malware Config

Targets

    • Target

      test.exe

    • Size

      187KB

    • MD5

      d6d75d536a2cff983197d333d0230a05

    • SHA1

      cb3872741f661e1f483f7719619ec5c14db15e66

    • SHA256

      cc13206ad514d61c7ea83f9380a571b93e23faafa829b04e877fcd38b4e83b75

    • SHA512

      1219ebdf6ffe7aad099b4af6b9d837acb8183f671736af0bc627fceb18ce69ae9301167afc56277cf20ec7c9fd9f8d537f755bad8fa33c84c8579499a4489c26

    • SSDEEP

      3072:wSV3J6kkt5h1X+HqTi0BW69hd1MMdxPe9N9uA0/+hL9TBfnPE6g0UasVmkoYcMKV:wHt5hBPi0BW69hd1MMdxPe9N9uA069Tx

    Score
    10/10
    discoverydropperexploitransomwareumbralcredential_accessexecutionstealer

    • Detect Umbral payload

    • Umbral

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

      stealerumbral

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

      credential_accessstealer

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

      execution

    • Download via BitsAdmin

      dropper

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Possible privilege escalation attempt

      exploit

    • Checks computer location settings

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

    • Drops startup file

    • Modifies file permissions

      discovery

    • 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.

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Persistence

BITS Jobs

1
T1197

Privilege Escalation

Defense Evasion

BITS Jobs

1
T1197

File and Directory Permissions Modification

1
T1222

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Modify Registry

1
T1112

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

4
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Web Service

1
T1102

Exfiltration

Impact

Defacement

1
T1491

Tasks