General

  • Target

    skuld.exe

  • Size

    9.5MB

  • Sample

    240524-r9knqshg8t

  • MD5

    890edd42dd5c1b147de66f9ee7dddc27

  • SHA1

    931bc48e9547e896de5e9e8b9549c396a2e11aba

  • SHA256

    1ac839f45a2ddad20559c6fe53df1135aa1368f0b46a6efff1b257922f000d28

  • SHA512

    90af8949001c772e80692b79a2cb11ea54f56bf03a031473c9716785edd2053e6fb0ed3a096ff88476d353a0935e136edb44a516509730c88c00b0a4e8dbce49

  • SSDEEP

    98304:25HOIhoB0mnl0l7t4qheyrVX53+9pENvGF8YfD:Gn80Q2beyrVp+9qNsD

Malware Config

Targets

    • Target

      skuld.exe

    • Size

      9.5MB

    • MD5

      890edd42dd5c1b147de66f9ee7dddc27

    • SHA1

      931bc48e9547e896de5e9e8b9549c396a2e11aba

    • SHA256

      1ac839f45a2ddad20559c6fe53df1135aa1368f0b46a6efff1b257922f000d28

    • SHA512

      90af8949001c772e80692b79a2cb11ea54f56bf03a031473c9716785edd2053e6fb0ed3a096ff88476d353a0935e136edb44a516509730c88c00b0a4e8dbce49

    • SSDEEP

      98304:25HOIhoB0mnl0l7t4qheyrVX53+9pENvGF8YfD:Gn80Q2beyrVp+9qNsD

    • 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