General

  • Target

    C4Loader.exe

  • Size

    124KB

  • Sample

    221111-3djbkscd27

  • MD5

    99f682f75994261bd769f11cd33820e7

  • SHA1

    2d8f77e1aebc274f94c56626fe1a71514c01b439

  • SHA256

    84374cb55c56fb530ef4f83f655ffeb7463e8c0452d7f13d57535d9e032e761f

  • SHA512

    00ca067af16d76cd5e344065c3f6c223a5e35bf79b67759bfed26e1994bcbe36ca0ff0cfc10c4175659813a1501d8e5d9d64fbcaf98d92459ca052f15ff0f0db

  • SSDEEP

    3072:x8Bwf9nPJ6+qVDRhIJTz7y1bJs6Httemsk3QnDPofdc:x8Snh2RIEJsKetudc

Malware Config

Extracted

Family

redline

Botnet

1

C2

107.182.129.73:21733

Attributes
  • auth_value

    3a5bb0917495b4312d052a0b8977d2bb

Targets

    • Target

      C4Loader.exe

    • Size

      124KB

    • MD5

      99f682f75994261bd769f11cd33820e7

    • SHA1

      2d8f77e1aebc274f94c56626fe1a71514c01b439

    • SHA256

      84374cb55c56fb530ef4f83f655ffeb7463e8c0452d7f13d57535d9e032e761f

    • SHA512

      00ca067af16d76cd5e344065c3f6c223a5e35bf79b67759bfed26e1994bcbe36ca0ff0cfc10c4175659813a1501d8e5d9d64fbcaf98d92459ca052f15ff0f0db

    • SSDEEP

      3072:x8Bwf9nPJ6+qVDRhIJTz7y1bJs6Httemsk3QnDPofdc:x8Snh2RIEJsKetudc

    • Modifies security service

    • RedLine

      RedLine Stealer is a malware family written in C#, first appearing in early 2020.

    • RedLine payload

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Stops running service(s)

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Loads dropped DLL

    • Uses the VBS compiler for execution

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Scheduled Task

1
T1053

Persistence

Modify Existing Service

2
T1031

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Impair Defenses

1
T1562

Scripting

1
T1064

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Impact

Service Stop

1
T1489

Tasks