Overview

overview

10

Static

static

rtyrryr.exe

windows7-x64

8

rtyrryr.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    rtyrryr.exe

  • Size

    6KB

  • Sample

    221203-27nygshh2t

  • MD5

    f853ede612b21de687500cd9892c37ad

  • SHA1

    fbb1e62b890b50f1ab552cefb6a7b24db875fbb6

  • SHA256

    e1178760d7690fdba91528ff2053a646c84774a721fa554fc94130bd50375ac0

  • SHA512

    4de3e875a111cd90eda4c59d554d8eb4001d18e1f2fde173ba74f24a78decbe74e5327654bf30693943bc224f81c728686cd4c2650f36ed8ae47d60a0211c42b

  • SSDEEP

    96:9xr79BTaCF5NTcM4tweWvk+PneJtNNtUqGsukdNx2d3oj+rl:9xX9FBFDT4qJvkwnEfNtUqGsukR2dZ

Score
10/10
asyncratdefendersmartscrenpersistencerat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

DefenderSmartScren

C2

217.64.31.3:8437

Mutex

DefenderSmartScren

Attributes
  • delay

    3

  • install

    false

  • install_file

    SecurityHealtheurvice.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      rtyrryr.exe

    • Size

      6KB

    • MD5

      f853ede612b21de687500cd9892c37ad

    • SHA1

      fbb1e62b890b50f1ab552cefb6a7b24db875fbb6

    • SHA256

      e1178760d7690fdba91528ff2053a646c84774a721fa554fc94130bd50375ac0

    • SHA512

      4de3e875a111cd90eda4c59d554d8eb4001d18e1f2fde173ba74f24a78decbe74e5327654bf30693943bc224f81c728686cd4c2650f36ed8ae47d60a0211c42b

    • SSDEEP

      96:9xr79BTaCF5NTcM4tweWvk+PneJtNNtUqGsukdNx2d3oj+rl:9xX9FBFDT4qJvkwnEfNtUqGsukR2dZ

    Score
    10/10
    asyncratdefendersmartscrenpersistencerat

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers.

      ratasyncrat

    • Async RAT payload

      rat

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Adds Run key to start application

      persistence

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks