Overview

overview

10

Static

static

4a394a5f68...23.exe

windows7_x64

10

4a394a5f68...23.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    11-05-2021 13:46

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General

  • Target

    4a394a5f68be6704adc8bac0ac9c3ef89e3295b9fd26c92363ae95ff2a8f8d23.exe

  • Size

    623KB

  • MD5

    6cfb969b2b61fab4bcb4c3b33c987014

  • SHA1

    79e74d1e8fae81b2b1c37769627ac46947f0bc76

  • SHA256

    4a394a5f68be6704adc8bac0ac9c3ef89e3295b9fd26c92363ae95ff2a8f8d23

  • SHA512

    50af7576b9f6237794dcb0ea1b8c6fcddfc405c7423b9829801cdb9f6ec82b1bff3e4282c0204c96be379bff6007ecfc262c6fd38431ab3f5a9a83197b1644c6

Score
10/10
evasionpersistencespywarestealertrojan

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
    persistence
  • Modifies visibility of file extensions in Explorer 2 TTPs
    evasion
  • UAC bypass 3 TTPs
    evasiontrojan
  • Executes dropped EXE 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Adds Run key to start application 2 TTPs 5 IoCs
    persistence
  • Drops file in System32 directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4a394a5f68be6704adc8bac0ac9c3ef89e3295b9fd26c92363ae95ff2a8f8d23.exe
    "C:\Users\Admin\AppData\Local\Temp\4a394a5f68be6704adc8bac0ac9c3ef89e3295b9fd26c92363ae95ff2a8f8d23.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3152
    • C:\Users\Admin\ucUUgIsY\amMwQgQA.exe
      "C:\Users\Admin\ucUUgIsY\amMwQgQA.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      PID:584
    • C:\ProgramData\fUEoQQYA\ukcksYks.exe
      "C:\ProgramData\fUEoQQYA\ukcksYks.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in System32 directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of FindShellTrayWindow
      PID:1192
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\choco.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2196
      • C:\Users\Admin\AppData\Local\Temp\choco.exe
        C:\Users\Admin\AppData\Local\Temp\choco.exe
        3⤵
        • Executes dropped EXE
        PID:2576
    • C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
      2⤵
      • Modifies registry key
      PID:2532
    • C:\Windows\SysWOW64\reg.exe
      reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
      2⤵
      • Modifies registry key
      PID:3584
    • C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
      2⤵
      • Modifies registry key
      PID:2824
  • C:\ProgramData\OEIEcwAM\MsAgUMEU.exe
    C:\ProgramData\OEIEcwAM\MsAgUMEU.exe
    1⤵
    • Executes dropped EXE
    • Adds Run key to start application
    • Drops file in System32 directory
    PID:1640

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Hidden Files and Directories

1
T1158

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Modify Registry

5
T1112

Hidden Files and Directories

1
T1158

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\ProgramData\OEIEcwAM\MsAgUMEU.exe
    MD5

    0608348c21afd005dc50c9c90ebfc896

    SHA1

    fc449d5dca4311062f18133a238344aede10de63

    SHA256

    d8b1f9de1e409513beb9cc684c054a139439d1a7190658c9dbcf74f14eb92a2b

    SHA512

    1d44470d5ae6b9dae18fa3e84e82ec1668f19ca2a575ccbffc10ac2a55be50a3bc67758e60bd4bb6a3b11abdd322545b3fbf7a5068585e4d44f26385f78d15fe

    Download Submit
  • C:\ProgramData\OEIEcwAM\MsAgUMEU.exe
    MD5

    0608348c21afd005dc50c9c90ebfc896

    SHA1

    fc449d5dca4311062f18133a238344aede10de63

    SHA256

    d8b1f9de1e409513beb9cc684c054a139439d1a7190658c9dbcf74f14eb92a2b

    SHA512

    1d44470d5ae6b9dae18fa3e84e82ec1668f19ca2a575ccbffc10ac2a55be50a3bc67758e60bd4bb6a3b11abdd322545b3fbf7a5068585e4d44f26385f78d15fe

    Download Submit
  • C:\ProgramData\fUEoQQYA\ukcksYks.exe
    MD5

    c64aea81544ca5e9a1a143b21932b6d1

    SHA1

    393bf58bf444c1d3dba5d4ffd9969223cde1ca0a

    SHA256

    a021621e007468773555510cc943a18c9a5053be88b8947ac2a1c807ee2d2087

    SHA512

    dc7cc10e0ca6b746735401c06d55085107b039aeee2f9708e7a6f2bf6be956c2fe5318f71c1fb64e63070a195eeaf06615b2617b6385a10088fec86a28f8c7c0

    Download Submit
  • C:\ProgramData\fUEoQQYA\ukcksYks.exe
    MD5

    c64aea81544ca5e9a1a143b21932b6d1

    SHA1

    393bf58bf444c1d3dba5d4ffd9969223cde1ca0a

    SHA256

    a021621e007468773555510cc943a18c9a5053be88b8947ac2a1c807ee2d2087

    SHA512

    dc7cc10e0ca6b746735401c06d55085107b039aeee2f9708e7a6f2bf6be956c2fe5318f71c1fb64e63070a195eeaf06615b2617b6385a10088fec86a28f8c7c0

    Download Submit
  • C:\Users\Admin\AppData\Local\Temp\choco.exe
    MD5

    c258b25b6ec8f09230e272033ad4b2fa

    SHA1

    c4e862d33fe8915818d9e58d428c7324a436f97f

    SHA256

    29f612bb3cc7a9712baaae62b49b0c03a661280b8bf0177b2713a13c016d0b32

    SHA512

    21f7da9bf267f4cb897d9475f8a6f32e6f7e777c3f761b739da4038d44c2786030bc46ab54a8832205d1fb1fe944d7005eb34ddad3700c4c79bcdb932191b90c

    Download Submit
  • C:\Users\Admin\AppData\Local\Temp\choco.exe
    MD5

    c258b25b6ec8f09230e272033ad4b2fa

    SHA1

    c4e862d33fe8915818d9e58d428c7324a436f97f

    SHA256

    29f612bb3cc7a9712baaae62b49b0c03a661280b8bf0177b2713a13c016d0b32

    SHA512

    21f7da9bf267f4cb897d9475f8a6f32e6f7e777c3f761b739da4038d44c2786030bc46ab54a8832205d1fb1fe944d7005eb34ddad3700c4c79bcdb932191b90c

    Download Submit
  • C:\Users\Admin\ucUUgIsY\amMwQgQA.exe
    MD5

    a9e12201232171a2299f73192c9f6771

    SHA1

    359d34908da3e15d7a4ef175ebcbdfd955d86e01

    SHA256

    31a4bb8d6e0bb0822f48e99bdb9e4ce3b9df30a0bd0d781633816e949b0741e1

    SHA512

    4720d1deca638ff49e487399d1c94912a8bf75dfc6082bf7952e90184f313ff25e4c8b3ea030f3aacaf6b15ad86d843bc6424e0c28337291a35ef4d29da9598e

    Download Submit
  • C:\Users\Admin\ucUUgIsY\amMwQgQA.exe
    MD5

    a9e12201232171a2299f73192c9f6771

    SHA1

    359d34908da3e15d7a4ef175ebcbdfd955d86e01

    SHA256

    31a4bb8d6e0bb0822f48e99bdb9e4ce3b9df30a0bd0d781633816e949b0741e1

    SHA512

    4720d1deca638ff49e487399d1c94912a8bf75dfc6082bf7952e90184f313ff25e4c8b3ea030f3aacaf6b15ad86d843bc6424e0c28337291a35ef4d29da9598e

    Download Submit
  • memory/584-114-0x0000000000000000-mapping.dmp
    Download
  • memory/1192-117-0x0000000000000000-mapping.dmp
    Download
  • memory/2196-122-0x0000000000000000-mapping.dmp
    Download
  • memory/2532-123-0x0000000000000000-mapping.dmp
    Download
  • memory/2576-124-0x0000000000000000-mapping.dmp
    Download
  • memory/2576-129-0x0000000000A50000-0x0000000000A51000-memory.dmp
    Filesize

    4KB

    Download
  • memory/2576-131-0x000000001B620000-0x000000001B622000-memory.dmp
    Filesize

    8KB

    Download
  • memory/2824-126-0x0000000000000000-mapping.dmp
    Download
  • memory/3584-127-0x0000000000000000-mapping.dmp
    Download