Overview

overview

10

Static

static

3

59cfbef2d2...e4.exe

windows7-x64

10

59cfbef2d2...e4.exe

windows10-2004-x64

10

$PLUGINSDI...em.dll

windows7-x64

3

$PLUGINSDI...em.dll

windows10-2004-x64

3

$PLUGINSDI...ec.dll

windows7-x64

3

$PLUGINSDI...ec.dll

windows10-2004-x64

3

Sharing

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General

  • Target

    86501b9b040efe6e4e14f4cc59f5a3de7f271a1843067c5f88b28732506e5871

  • Size

    228KB

  • Sample

    240417-saqldaee7x

  • MD5

    fdd5e4a6cfb853cd2151cfc7da171204

  • SHA1

    4f9a2b364901bd1532d341e4fec81fe4e2b7e39a

  • SHA256

    86501b9b040efe6e4e14f4cc59f5a3de7f271a1843067c5f88b28732506e5871

  • SHA512

    5b22bcb559e9cc57475d767360fd3a99f80363ac08c67afdc033d0dfb133c7915d8545be405bce0f8c2b2ac934a3a4d351c01ef73df5d33186f8450e3658ff87

  • SSDEEP

    6144:M5miD9g8k7l+Z+RBxXDy1GHjo0PIx9Odj5:shql+ZEBxXDy1ujt49Odj5

Score
10/10
guloaderremcosremotehostdownloaderpersistencerat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

194.147.140.205:4040

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-RJDWXW

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      59cfbef2d28f5f8df3c98d8525acf710bbad31e3bed87ccb6d8c3d9f5a9d8fe4.exe

    • Size

      242KB

    • MD5

      4e4bc21a1c1a34037e44db52a50086d5

    • SHA1

      1419003d268ef43d3128c11f92e9533793b07320

    • SHA256

      59cfbef2d28f5f8df3c98d8525acf710bbad31e3bed87ccb6d8c3d9f5a9d8fe4

    • SHA512

      2ee099ce340f23a535726a4310d0e40fabd23e3e4ded625fe4fc18ea2cda3c6346d28a14f91c73f01161d572e30090de124ca32e05265ce387dc737869db27a0

    • SSDEEP

      6144:jmGIhq8Q9AiAaK1Ga4my15stpehMPoCYRZ5oXuc81/L:qu8xpQm/abCMZcuc81T

    Score
    10/10
    guloaderremcosremotehostdownloaderpersistencerat

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Remcos

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

      ratremcos

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

    • Target

      $PLUGINSDIR/System.dll

    • Size

      12KB

    • MD5

      0d7ad4f45dc6f5aa87f606d0331c6901

    • SHA1

      48df0911f0484cbe2a8cdd5362140b63c41ee457

    • SHA256

      3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

    • SHA512

      c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

    • SSDEEP

      192:1enY0LWelt70elWjvfstJcVtwtYbjnIOg5AaDnbC7ypXhtIj:18PJlt70esj0Mt9vn6ay6

    Score
    3/10
    behavioral3behavioral4

    • Target

      $PLUGINSDIR/nsExec.dll

    • Size

      6KB

    • MD5

      ec0504e6b8a11d5aad43b296beeb84b2

    • SHA1

      91b5ce085130c8c7194d66b2439ec9e1c206497c

    • SHA256

      5d9ceb1ce5f35aea5f9e5a0c0edeeec04dfefe0c77890c80c70e98209b58b962

    • SHA512

      3f918f1b47e8a919cbe51eb17dc30acc8cfc18e743a1bae5b787d0db7d26038dc1210be98bf5ba3be8d6ed896dbbd7ac3d13e66454a98b2a38c7e69dad30bb57

    • SSDEEP

      96:YjHFiKaoggCtJzTlKXb0tbo68qD853Ns7GgmkNq3m+s:JbogRtJzTlNR8qD85uGgmkNr

    Score
    3/10
    behavioral5behavioral6

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

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

Credential Access

Discovery

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Resource Development

Reconnaissance

Tasks