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Pikabot: The Multi-C2 Cobalt Strike Loader operation cover
IntermediateSIEMFirewallXDREmailPRO

Pikabot: The Multi-C2 Cobalt Strike Loader

A freight operations coordinator followed a malspam link to a compromised site and downloaded a transport docket that turned out to be a script. Follow the chain from the booby-trapped link through a curl-staged loader DLL, a rundll32 execution proxy, and a spread of high-port beacons to the memory-only Cobalt Strike handoff.

1h
7 tasks
50 points
Pro

Start this operation

Investigation Tasks

Complete each task by investigating alerts and submitting your findings.

1

Read in on the incident

0

Before you touch the data, get oriented. A workstation on the freight operations floor raised an endpoint alert this morning, and the early signs point to a loader infection that did not stop at itself.

2

Trace the delivery

20

The operations coordinator did not receive an attachment. They received a link, followed it, and pulled down an archive from an outside site. Recover the web address the archive was downloaded from.

Hint available
3

Identify what actually ran

20

The archive was advertised as transport paperwork, but what executed was not a document. Identify the file inside the archive that the endpoint actually ran.

Hint available
4

Recover the staged loader

20

The script did not carry the payload. It reached out and pulled a module down over an encrypted channel, then handed it to a trusted system utility to run. Recover the file that was staged and loaded.

Hint available
5

Find the first command channel

20

Once the loader was running, it called home. Its command-and-control did not use a normal web port; it spread across several outside hosts on unusual high ports, which together are one channel. Recover the first endpoint it beaconed to, as address and port.

Hint available
6

Catch the second-stage handoff

20

The loader did not stop at itself. It planted a second-stage implant inside a trusted Windows process and that implant reached out to a different command server over HTTPS. Recover the host the second-stage implant checked in to.

Hint available
7

Classify the execution proxy

15

For the report, classify the evasion technique the attacker used to run the staged loader module through a signed system utility instead of launching it directly. Map it to its MITRE ATT&CK technique.

Hint available

7 tasks · 115 points total

Training Tools

Skills You'll Build

Investigate realistic security alerts
SIEM log analysis
Firewall log analysis
XDR log analysis
Email log analysis
MITRE ATT&CK® technique identification
Triage decisions: escalate, investigate, or close
Evidence collection and documentation
Job-ready incident response methodology
Intermediate

Requires foundational alert triage skills. Multiple data sources to correlate.

Prerequisites

  • Basic understanding of security alerts
  • Familiarity with SIEM concepts
  • Familiarity with Firewall concepts
  • Familiarity with XDR concepts
  • Familiarity with Email concepts

Ready to investigate?

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