Overview

overview

10

Static

static

4501185419.xls

windows7-x64

10

4501185419.xls

windows10-2004-x64

1

Sharing

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General

  • Target

    4501185419.xls

  • Size

    674KB

  • Sample

    230127-rpmmladb2x

  • MD5

    6ab14c920d762241b62aaa41f0982987

  • SHA1

    c54366de6d4dd2fa8e985ccac8775a91ba7e80da

  • SHA256

    14ea594b7f0fe9efb3fcd31f36febd5ebc0f686b85284131874296f398bc2842

  • SHA512

    c2b6ec8dc92d2146679e310d485f31bfa78dbd9ac9e573d2e354a76d645a3c92a2ed06da58192ce616a32138bc369c010d681a62f5565515831b4ad664444a53

  • SSDEEP

    12288:KAaVfMrz1mcpsL8Z9FovaVfMrzsmoLsLmZ9ZAvaVfBrz1mzpsLmZjF:KQfkcK8Z9FotfroEmZ9ZAQfkzKmZjF

Score
10/10
purecryptersmokeloaderbackdoordownloaderloaderpersistencetrojan

Malware Config

Targets

    • Target

      4501185419.xls

    • Size

      674KB

    • MD5

      6ab14c920d762241b62aaa41f0982987

    • SHA1

      c54366de6d4dd2fa8e985ccac8775a91ba7e80da

    • SHA256

      14ea594b7f0fe9efb3fcd31f36febd5ebc0f686b85284131874296f398bc2842

    • SHA512

      c2b6ec8dc92d2146679e310d485f31bfa78dbd9ac9e573d2e354a76d645a3c92a2ed06da58192ce616a32138bc369c010d681a62f5565515831b4ad664444a53

    • SSDEEP

      12288:KAaVfMrz1mcpsL8Z9FovaVfMrzsmoLsLmZ9ZAvaVfBrz1mzpsLmZjF:KQfkcK8Z9FotfroEmZ9ZAQfkzKmZjF

    Score
    10/10
    purecryptersmokeloaderbackdoordownloaderloaderpersistencetrojan

    • Detect PureCrypter injector

      loader

    • Detects Smokeloader packer

    • PureCrypter

      PureCrypter is a .NET malware loader first seen in early 2021.

      loaderdownloaderpurecrypter

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

      trojanbackdoorsmokeloader

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Uses the VBS compiler for execution

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Scripting

1
T1064

Modify Registry

2
T1112

Credential Access

Discovery

System Information Discovery

4
T1082

Query Registry

3
T1012

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks