Resubmissions

08-10-2023 10:17

231008-mbm9rabc3v 10

08-10-2023 09:55

231008-lxw84sde36 10

General

  • Target

    Xworm V5.0.zip

  • Size

    29.7MB

  • Sample

    231008-mbm9rabc3v

  • MD5

    d4bedeb1045da2b8be2fb8b5b78a9508

  • SHA1

    426679b6d82bec0aed07bc2293bf070550d95620

  • SHA256

    9702a4f1f432220d5c7afca5aa0aa682be7362afdfeae8276abf70bfcffb7313

  • SHA512

    f7a018f996b78a84f138e564cad7a15b4c25208a3111d39310792b1297f5d51e0dee694df9eda2487fdff86ec347685ef6e2ec9eef9a7fc69d80188ca5837ee0

  • SSDEEP

    786432:ynKX23QgeyHcgpsQIJ2eEXSFjtRLnQ4+Ge/inEdOJkP7oDPctM:PX23Qgh51IgxSFjc2pkz2b

Malware Config

Targets

    • Target

      Xworm V5.0.zip

    • Size

      29.7MB

    • MD5

      d4bedeb1045da2b8be2fb8b5b78a9508

    • SHA1

      426679b6d82bec0aed07bc2293bf070550d95620

    • SHA256

      9702a4f1f432220d5c7afca5aa0aa682be7362afdfeae8276abf70bfcffb7313

    • SHA512

      f7a018f996b78a84f138e564cad7a15b4c25208a3111d39310792b1297f5d51e0dee694df9eda2487fdff86ec347685ef6e2ec9eef9a7fc69d80188ca5837ee0

    • SSDEEP

      786432:ynKX23QgeyHcgpsQIJ2eEXSFjtRLnQ4+Ge/inEdOJkP7oDPctM:PX23Qgh51IgxSFjc2pkz2b

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • AgentTesla payload

    • Downloads MZ/PE file

    • Possible privilege escalation attempt

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

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

File and Directory Permissions Modification

1
T1222

Modify Registry

2
T1112

Discovery

Query Registry

7
T1012

System Information Discovery

6
T1082

Peripheral Device Discovery

2
T1120

Tasks