General

  • Target

    1a93d204cd4bf9b77434af18be074c47ad7fcebdd109ecc87f77d6b78a9ff2b3.exe

  • Size

    4.9MB

  • Sample

    221017-f76bwaagb9

  • MD5

    37aa26e9208b0930fb1068d718d2e32e

  • SHA1

    89a3c8a1f0288b0cb6797d0e17ddaa7961d65acc

  • SHA256

    1a93d204cd4bf9b77434af18be074c47ad7fcebdd109ecc87f77d6b78a9ff2b3

  • SHA512

    5c2645f16f8a0ba54c31128fc5f0f8b7b5e81ce208f42798904d39fd6de08e6f1378f9665e70412f5ba6b575dd90ca90191a8cbcdbf24511337a0ecf422d7fc8

  • SSDEEP

    49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8E:

Malware Config

Extracted

Family

colibri

Version

1.2.0

Botnet

Build1

C2

http://zpltcmgodhvvedxtfcygvbgjkvgvcguygytfigj.cc/gate.php

http://yugyuvyugguitgyuigtfyutdtoghghbbgyv.cx/gate.php

Targets

    • Target

      1a93d204cd4bf9b77434af18be074c47ad7fcebdd109ecc87f77d6b78a9ff2b3.exe

    • Size

      4.9MB

    • MD5

      37aa26e9208b0930fb1068d718d2e32e

    • SHA1

      89a3c8a1f0288b0cb6797d0e17ddaa7961d65acc

    • SHA256

      1a93d204cd4bf9b77434af18be074c47ad7fcebdd109ecc87f77d6b78a9ff2b3

    • SHA512

      5c2645f16f8a0ba54c31128fc5f0f8b7b5e81ce208f42798904d39fd6de08e6f1378f9665e70412f5ba6b575dd90ca90191a8cbcdbf24511337a0ecf422d7fc8

    • SSDEEP

      49152:bl5MTGChZpxtlBBgxchXb/zqP6DUtRgs5q289dAnSz44hnW1XgnYu6fYmPkMSx8E:

    • Colibri Loader

      A loader sold as MaaS first seen in August 2021.

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Executes dropped EXE

    • Checks computer location settings

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

    • Checks whether UAC is enabled

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Bypass User Account Control

1
T1088

Scheduled Task

1
T1053

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Tasks