General

  • Target

    skuld.exe

  • Size

    9.5MB

  • Sample

    240511-kk4lzshe5z

  • MD5

    9aa0a7fe9d6c1d63afba8737d74db883

  • SHA1

    dfcf414f0dc9000ed20e3e890420938fba44832f

  • SHA256

    447639dd4a5ea773eca0a2c73ba0f24e506ddf1fd209def728909e37bcfe01fa

  • SHA512

    98c26a483b2ec3b2829cd4801f436b0c6accf28f221506e88528102cd0dba988e2a4e87492cf31f8da232675afd0363ec2e76cf85c81b91aaa4b9e76b476f83b

  • SSDEEP

    98304:88tIBGYnVpvuiIjEN0xS5XGWE6IpSF8SejC:3oGYnLNVN0xSVGT6IOejC

Malware Config

Targets

    • Target

      skuld.exe

    • Size

      9.5MB

    • MD5

      9aa0a7fe9d6c1d63afba8737d74db883

    • SHA1

      dfcf414f0dc9000ed20e3e890420938fba44832f

    • SHA256

      447639dd4a5ea773eca0a2c73ba0f24e506ddf1fd209def728909e37bcfe01fa

    • SHA512

      98c26a483b2ec3b2829cd4801f436b0c6accf28f221506e88528102cd0dba988e2a4e87492cf31f8da232675afd0363ec2e76cf85c81b91aaa4b9e76b476f83b

    • SSDEEP

      98304:88tIBGYnVpvuiIjEN0xS5XGWE6IpSF8SejC:3oGYnLNVN0xSVGT6IOejC

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Drops file in Drivers directory

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Looks up external IP address via web service

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

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

2
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Credential Access

Unsecured Credentials

3
T1552

Credentials In Files

3
T1552.001

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Tasks