================================================================================
  FICTIONAL `strings` OUTPUT — CTF Red Team Lesson 06
  Command: strings -n 4 suspicious_agent
  NOTE: This is a simulated output for educational purposes only.
================================================================================

/lib64/ld-linux-x86-64.so.2
libc.so.6
libssl.so.1.1
libcrypto.so.1.1
__gmon_start__
_ITM_deregisterTMCloneTable
_ITM_registerTMCloneTable
__cxa_finalize
printf
scanf
strcmp
strlen
malloc
free
memcpy
memset
socket
connect
send
recv
close
fork
execve
getenv
setenv
open
read
write
fopen
fclose
fgets
fputs
SSL_CTX_new
SSL_new
SSL_connect
SSL_write
SSL_read
SSL_shutdown
EVP_EncryptInit_ex
EVP_EncryptUpdate
EVP_DecryptInit_ex
GLIBC_2.2.5
GLIBC_2.14
OPENSSL_1_1_0
.symtab
.strtab
.shstrtab
.interp
.note.ABI-tag
.note.gnu.build-id
.gnu.hash
.dynsym
.dynstr
.gnu.version
.gnu.version_r
.rela.dyn
.rela.plt
.init
.text
.fini
.rodata
.data
.bss
GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
=== Suspicious Agent v2.7 ===
[*] Initializing modules...
[+] Module loaded: keylogger
[+] Module loaded: screen_capture
[+] Module loaded: file_exfil
[+] Module loaded: persistence
[-] Error: Failed to establish connection
[-] Error: Invalid configuration file
[-] Error: Decryption key mismatch
[!] Warning: Anti-debug detected
[!] Warning: Sandbox environment suspected
Enter access code:
Access code accepted.
Access code rejected.
Usage: %s [options]
  -d    Enable debug mode
  -c    Specify config file
  -s    Silent mode (no output)
  -p    Specify port number
  -h    Show this help message
DEBUG: Raw key bytes = %02x%02x%02x%02x
DEBUG: Decrypted config: %s
DEBUG: Connection established to %s:%d
/tmp/.cache/agent.pid
/tmp/.cache/config.enc
/var/log/.hidden_log
/etc/cron.d/.persistence
$HOME/.local/share/.update
$HOME/.config/.session_token
/proc/self/status
/proc/self/maps
TracerPid:
/dev/null
/bin/sh
http://c2.example.com/beacon
http://c2.example.com/upload
http://c2.example.com/download
http://c2.example.com/cmd
ws://relay.example.com:8443/agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36
Content-Type: application/json
X-Agent-ID: %s
X-Session-Token: %s
{"status":"alive","hostname":"%s","user":"%s","pid":%d}
{"type":"keylog","data":"%s"}
{"type":"screenshot","data":"%s"}
AES-256-CBC
RSA-2048
HMAC-SHA256
-----BEGIN RSA PRIVATE KEY-----
MIIBogIBAAJBALRiMLAHudeSA/x3TLO
-----END RSA PRIVATE KEY-----
%d.%d.%d.%d
SELECT * FROM users WHERE id='%s'
SYNT{fgevatf_ner_erirnyvat}
cmd.exe /c %s
/bin/bash -c '%s'
powershell -enc %s
reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run
crontab -l | { cat; echo "*/5 * * * * %s"; } | crontab -
schtasks /create /tn "WindowsUpdate" /tr "%s" /sc minute /mo 5
TF_AGENT_KEY=b4ckd00r_m4st3r
EXFIL_ENDPOINT=https://drop.example.com/recv
ENCRYPT_KEY=0123456789abcdef0123456789abcdef
CONFIG_IV=abcdef0123456789
xor_decode_buf
rc4_encrypt_stream
aes_cbc_decrypt_config
generate_session_id
anti_debug_check
detect_sandbox
establish_persistence
cleanup_traces
self_destruct
[ENCODED_FLAG] Q1RGe2gxZGQzbl9pbl9wbDQxbl9zMWdodH0=
supers3cretp@ssw0rd
build_timestamp=2025-12-15T08:30:00Z
build_host=ci-runner-07.internal

================================================================================
  END OF STRINGS OUTPUT

  Flags to find:
  - ROT13-encoded flag: SYNT{fgevatf_ner_erirnyvat}
    Decode: FLAG{strings_are_revealing}
  - Base64-encoded flag: Q1RGe2gxZGQzbl9pbl9wbDQxbl9zMWdodH0=
    Decode: CTF{h1dd3n_in_pl41n_s1ght}
  - Hardcoded password: supers3cretp@ssw0rd
  - C2 URLs: http://c2.example.com/beacon (and others)
  - Hidden file paths for persistence
  - Anti-debug / sandbox detection strings
  - Embedded RSA private key fragment
  - SQL injection pattern
================================================================================