Overview

overview

10

Static

static

10

z9ERDG51.exe

windows7_x64

10

z9ERDG51.exe

windows10_x64

10

Sharing

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General

  • Target

    z9ERDG51.exe

  • Size

    92KB

  • Sample

    201125-325ac1dbax

  • MD5

    cc6a463987484ace0a9f98e327c85c2b

  • SHA1

    1867031e6a7d7057d7d96cfd4ad99eba14afde1e

  • SHA256

    08f15e4acb5af5b3095304fbfd9370d33ea57a561da66bc1239477cdc6530dc3

  • SHA512

    9e8286d422cb012826eeb390073cbeb58b8685b86befd3b620dfce0b5e489db04ce15f91682cd000ac8508ea54e474935eaad3ef6aeaf7d6f4de159609bc9e19

Score
10/10
remcosevasionpersistencerat

Malware Config

Extracted

Family

remcos

C2

185.185.3.40:2404

Targets

    • Target

      z9ERDG51.exe

    • Size

      92KB

    • MD5

      cc6a463987484ace0a9f98e327c85c2b

    • SHA1

      1867031e6a7d7057d7d96cfd4ad99eba14afde1e

    • SHA256

      08f15e4acb5af5b3095304fbfd9370d33ea57a561da66bc1239477cdc6530dc3

    • SHA512

      9e8286d422cb012826eeb390073cbeb58b8685b86befd3b620dfce0b5e489db04ce15f91682cd000ac8508ea54e474935eaad3ef6aeaf7d6f4de159609bc9e19

    Score
    10/10
    remcosevasionpersistencerat

    • Modifies WinLogon for persistence

      persistence

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

      ratremcos

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      evasion

    • Adds policy Run key to start application

      persistence

    • Executes dropped EXE

    • Deletes itself

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Modifies WinLogon

      persistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

2
T1004

Registry Run Keys / Startup Folder

2
T1060

Privilege Escalation

Defense Evasion

Modify Registry

4
T1112

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Discovery

Query Registry

1
T1012

Virtualization/Sandbox Evasion

1
T1497

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks