Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    142s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/04/2024, 13:20

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General

  • Target

    48cd145349ebdb8a3728c8c55b9e5a59df2ee7676a847afa340d7f88ae24cfd1.exe

  • Size

    426KB

  • MD5

    7d5053287343d71bf9e3b913d4e4e551

  • SHA1

    822191da126f6d18cbc110e02473afb0528751bd

  • SHA256

    48cd145349ebdb8a3728c8c55b9e5a59df2ee7676a847afa340d7f88ae24cfd1

  • SHA512

    801a414806c2ff4a8db764dd4d1fa9b2ad06ac7976fd5a98079362c33583dce246f95dd76427f911d0674d07d3ebd26085773653ca52ba779e2707f202428bd3

  • SSDEEP

    12288:qoE0Q+9PzNEAVTH2BKlYZQ/yKrFvM/2SwJ:F1L9zLLCKlAQqEva25

Score
10/10
asyncratbsod_newevasionpersistencerattrojan

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

BSOD_New

Mutex

Mika

Attributes
  • delay

    1

  • install

    false

  • install_file

    UpdateTaskMachineUa.bat.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/F7c4dqk3

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • UAC bypass 3 TTPs 1 IoCs
    evasiontrojan
  • Windows security bypass 2 TTPs 2 IoCs
    evasiontrojan
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs
    evasion
  • Looks for VMWare Tools registry key 2 TTPs 2 IoCs
    evasion
  • Checks BIOS information in registry 2 TTPs 4 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 3 IoCs
    evasiontrojan
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
    evasiontrojan
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 4 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • System policy modification 1 TTPs 1 IoCs
    evasion
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\48cd145349ebdb8a3728c8c55b9e5a59df2ee7676a847afa340d7f88ae24cfd1.exe
    "C:\Users\Admin\AppData\Local\Temp\48cd145349ebdb8a3728c8c55b9e5a59df2ee7676a847afa340d7f88ae24cfd1.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Adds Run key to start application
    • Maps connected drives based on registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1916
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2196
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4408
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp71D4.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1616
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1116
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • UAC bypass
        • Windows security bypass
        • Looks for VirtualBox Guest Additions in registry
        • Looks for VMWare Tools registry key
        • Checks BIOS information in registry
        • Checks computer location settings
        • Executes dropped EXE
        • Windows security modification
        • Checks whether UAC is enabled
        • Maps connected drives based on registry
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:4544
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4656
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

3
T1562

Disable or Modify Tools

3
T1562.001

Modify Registry

5
T1112

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

6
T1012

System Information Discovery

5
T1082

Virtualization/Sandbox Evasion

2
T1497

Lateral Movement

Collection

Command and Control

Web Service

1
T1102

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_o4zdvnzt.r31.ps1
    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\tmp71D4.tmp.bat
    Filesize

    151B

    MD5

    6358363978baf057a6735ab80ef2afaf

    SHA1

    c356283ce9ab8dcae2482c90751a0afa3e8c6b4b

    SHA256

    fdadf374b5cd24fc0659820b9f485fc4167020e3a4a10de997ffca786d18416e

    SHA512

    afbc523b10df9f53a8fef2800e603f9a77d136ecebd05503bd39596c5afe5e27aa3737f9a90e33403d781f776bf30c6e1a9e7b27cdff2fa1d68b66055b65779d

    Download Submit

  • C:\Users\Admin\AppData\Roaming\svchost.exe
    Filesize

    426KB

    MD5

    7d5053287343d71bf9e3b913d4e4e551

    SHA1

    822191da126f6d18cbc110e02473afb0528751bd

    SHA256

    48cd145349ebdb8a3728c8c55b9e5a59df2ee7676a847afa340d7f88ae24cfd1

    SHA512

    801a414806c2ff4a8db764dd4d1fa9b2ad06ac7976fd5a98079362c33583dce246f95dd76427f911d0674d07d3ebd26085773653ca52ba779e2707f202428bd3

    Download Submit

  • memory/1916-3-0x000001CFD7A70000-0x000001CFD7ADA000-memory.dmp

    Filesize

    424KB

    Download

  • memory/1916-8-0x00007FF96AB80000-0x00007FF96B641000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1916-0-0x000001CFD5D90000-0x000001CFD5D98000-memory.dmp

    Filesize

    32KB

    Download

  • memory/1916-2-0x000001CFD7BB0000-0x000001CFD7BC0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1916-1-0x00007FF96AB80000-0x00007FF96B641000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3380-35-0x0000000004D90000-0x0000000004DA0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3380-14-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

    Download

  • memory/3380-34-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/3380-33-0x0000000077701000-0x0000000077702000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3380-32-0x0000000004D90000-0x0000000004DA0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/3380-27-0x0000000074CA0000-0x0000000075450000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/4544-31-0x00007FF9698C0000-0x00007FF96A381000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4544-13-0x00007FF9698C0000-0x00007FF96A381000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4656-30-0x00007FF9698C0000-0x00007FF96A381000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4656-21-0x00000265F0540000-0x00000265F0562000-memory.dmp

    Filesize

    136KB

    Download

  • memory/4656-22-0x00000265F0500000-0x00000265F0510000-memory.dmp

    Filesize

    64KB

    Download

  • memory/4656-15-0x00007FF9698C0000-0x00007FF96A381000-memory.dmp

    Filesize

    10.8MB

    Download