Overview

overview

10

Static

static

1

cs.dll

windows7-x64

10

cs.dll

windows10-2004-x64

10

Analysis

  • max time kernel
    135s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/04/2023, 08:32

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General

  • Target
    cs.dll
  • Size 358KB
  • Sample230419-ke9wtabb8v
  • SHA256 6eec1d354aaa981a5bd59e144dce2376dbb5b153de66b3cac6672cd83d0914c1
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
cobaltstrikebackdoortrojan

Malware Config

Extracted

Family

  • cobaltstrike

C2

  • http://pevijup.xyz:443/wp-includes/RELEASES.png

Attributes
  • user_agent

    Host: instagram.com Connection: close User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.246

Signatures

  • Cobaltstrike

    Detected malicious payload which is part of Cobaltstrike.

    trojanbackdoorcobaltstrike
  • Blocklisted process makes network request 10 IoCs
  • Program crash 1 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\cs.dll,#1
    1⤵
    • Blocklisted process makes network request
    PID:1764
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1764 -s 1220
      2⤵
      • Program crash
      PID:1360
  • C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -pss -s 412 -p 1764 -ip 1764
    1⤵
      PID:4268

    Network

          MITRE ATT&CK Matrix

          Replay Monitor

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          Downloads

          memory/1764-133-0x0000027860450000-0x0000027860451000-memory.dmp
          Download

          memory/1764-134-0x0000000067B00000-0x0000000067B50000-memory.dmp
          Download