Resubmissions

02-06-2022 16:54

220602-vesbwacebm 10

09-04-2022 21:38

220409-1g1zpahgfj 9

General

  • Target

    72Fxor.o

  • Size

    525KB

  • Sample

    220602-vesbwacebm

  • MD5

    1a0e8787503fd9777f08c0b2f4bc8a53

  • SHA1

    9881f9d168e6cbba550bd132634c918cee7367c0

  • SHA256

    72f61ae2fbc105c21408cbe910da2b939ea98d26cafaf43a9fabe89361db9dec

  • SHA512

    64e69d34057158b29b6ca1cd53f44990fde65b5011dec7852d9095350564e6fbfe22a5b9c5bb2fc5304b4bf077c2b2644f1dbeae2c78ad08a6411b79425dbc9e

Malware Config

Targets

    • Target

      72Fxor.o

    • Size

      525KB

    • MD5

      1a0e8787503fd9777f08c0b2f4bc8a53

    • SHA1

      9881f9d168e6cbba550bd132634c918cee7367c0

    • SHA256

      72f61ae2fbc105c21408cbe910da2b939ea98d26cafaf43a9fabe89361db9dec

    • SHA512

      64e69d34057158b29b6ca1cd53f44990fde65b5011dec7852d9095350564e6fbfe22a5b9c5bb2fc5304b4bf077c2b2644f1dbeae2c78ad08a6411b79425dbc9e

    Score
    9/10
    • Writes file to system bin folder

    • Creates/modifies Cron job

      Cron allows running tasks on a schedule, and is commonly used for malware persistence.

    • Modifies rc script

      Adding/modifying system rc scripts is a common persistence mechanism.

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Write file to user bin folder

    • Reads runtime system information

      Reads data from /proc virtual filesystem.

    • Writes file to tmp directory

      Malware often drops required files in the /tmp directory.

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Hijack Execution Flow

2
T1574

Scheduled Task

1
T1053

Boot or Logon Autostart Execution

1
T1547

Privilege Escalation

Hijack Execution Flow

2
T1574

Scheduled Task

1
T1053

Boot or Logon Autostart Execution

1
T1547

Defense Evasion

Hijack Execution Flow

2
T1574

Tasks