Overview

overview

10

Static

static

10

c5bef2a489...in.exe

windows7_x64

10

c5bef2a489...in.exe

windows10_x64

10

Analysis

  • max time kernel
    128s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    08-08-2021 17:07

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General

  • Target

    c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6.bin.exe

  • Size

    669KB

  • MD5

    2120cf93b6be39884f951ee2a31c5999

  • SHA1

    317b695da0ece90979f0400c2c7800e50bec8bb9

  • SHA256

    c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6

  • SHA512

    3038b27dcc263675a642f77d9dbaaff921c3a56f160051df44619dbafcd5d108db1c6caeacb70179c511e284035d329f29c34dd19500d2bd4006d2f86ee1dc33

Score
10/10
medusalockerevasionransomwarespywarestealertrojan

Malware Config

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

    ransomwaremedusalocker
  • MedusaLocker Payload 2 IoCs
  • UAC bypass 3 TTPs
    evasiontrojan
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 3 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • System policy modification 1 TTPs 3 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6.bin.exe"
    1⤵
    • Modifies extensions of user files
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1656
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1140
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1708
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1596
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1440
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1084
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1272
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1944
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {F9DB72D7-9870-46A0-8819-C9359C2B8CCF} S-1-5-21-2513283230-931923277-594887482-1000:MRBKYMNO\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1120
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1528

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

File Deletion

2
T1107

Credential Access

Credentials in Files

1
T1081

Discovery

System Information Discovery

3
T1082

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Inhibit System Recovery

2
T1490

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\svhost.exe
    MD5

    2120cf93b6be39884f951ee2a31c5999

    SHA1

    317b695da0ece90979f0400c2c7800e50bec8bb9

    SHA256

    c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6

    SHA512

    3038b27dcc263675a642f77d9dbaaff921c3a56f160051df44619dbafcd5d108db1c6caeacb70179c511e284035d329f29c34dd19500d2bd4006d2f86ee1dc33

    Download Submit
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    MD5

    2120cf93b6be39884f951ee2a31c5999

    SHA1

    317b695da0ece90979f0400c2c7800e50bec8bb9

    SHA256

    c5bef2a489740192a0b2c34cdc2fd954d0b8d5fabcbe0ecb8b78f9301e5a30a6

    SHA512

    3038b27dcc263675a642f77d9dbaaff921c3a56f160051df44619dbafcd5d108db1c6caeacb70179c511e284035d329f29c34dd19500d2bd4006d2f86ee1dc33

    Download Submit
  • memory/1084-64-0x0000000000000000-mapping.dmp
    Download
  • memory/1140-60-0x0000000000000000-mapping.dmp
    Download
  • memory/1272-65-0x0000000000000000-mapping.dmp
    Download
  • memory/1440-63-0x0000000000000000-mapping.dmp
    Download
  • memory/1528-67-0x0000000000000000-mapping.dmp
    Download
  • memory/1596-62-0x0000000000000000-mapping.dmp
    Download
  • memory/1656-59-0x00000000757D1000-0x00000000757D3000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1708-61-0x0000000000000000-mapping.dmp
    Download