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

    97KB

  • Sample

    240809-m5zjwazdmk

  • MD5

    76e3b500026a13b38f9f898f54db8d38

  • SHA1

    25a2c9fac994627ad49067f132ee0d320025f23b

  • SHA256

    0996384cead0e1be85b7c15efc3db74bed7cef7513766d0ec8bf5026274ea6a5

  • SHA512

    15e974221e1da794fae0abc4f3e4c1c67631b3bc0b4a95df4bb31912de5831d9470b90217e90d347ceab8a5a0623663fe99d9be27155598408f009a3b5fd4f93

  • SSDEEP

    1536:r7fbN3eEDhDPA/pICdUkbBtW7upvaLU0bI5taxKo0IOlnToIf/wTA+J/pOg:n7DhdC6kzWypvaQ0FxyNTBf/Q

Score
10/10
umbralcredential_accessdiscoverydropperexecutionexploitransomwarestealer

Malware Config

Targets

    • Target

      test.exe

    • Size

      97KB

    • MD5

      76e3b500026a13b38f9f898f54db8d38

    • SHA1

      25a2c9fac994627ad49067f132ee0d320025f23b

    • SHA256

      0996384cead0e1be85b7c15efc3db74bed7cef7513766d0ec8bf5026274ea6a5

    • SHA512

      15e974221e1da794fae0abc4f3e4c1c67631b3bc0b4a95df4bb31912de5831d9470b90217e90d347ceab8a5a0623663fe99d9be27155598408f009a3b5fd4f93

    • SSDEEP

      1536:r7fbN3eEDhDPA/pICdUkbBtW7upvaLU0bI5taxKo0IOlnToIf/wTA+J/pOg:n7DhdC6kzWypvaQ0FxyNTBf/Q

    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