Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-02-2024 00:08

General

  • Target

    95ba95cad998d07b406c4b6161274e89.exe

  • Size

    1.7MB

  • MD5

    95ba95cad998d07b406c4b6161274e89

  • SHA1

    457a7b403eec2863716eaa5f2e0dc6c6c4a834b8

  • SHA256

    35611bfb7b38f17960d97815bf31b02fc0625cb9a839951f4beedb56de5e81d9

  • SHA512

    4a83be49e87d53eb61de227ab82c96bec169199b8dd7984235a0aacfe9ce55eaba5f54d7bbe4fd0701a430a56dea2dbbbbdf2e6e35490912c1f6d6d12f61107d

  • SSDEEP

    49152:Ta3Pt9AYZmGR7Q7afTDuY1tRHVMyi07Tg:u3OGhQ7a7DuG7Vaw

Malware Config

Signatures

  • Modifies firewall policy service 2 TTPs 10 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • Nirsoft 24 IoCs
  • Executes dropped EXE 11 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 42 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 11 IoCs
  • Modifies registry key 1 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 39 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\95ba95cad998d07b406c4b6161274e89.exe
    "C:\Users\Admin\AppData\Local\Temp\95ba95cad998d07b406c4b6161274e89.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3924
    • C:\Users\Admin\AppData\Roaming\csrss.exe
      C:\Users\Admin\AppData\Roaming\csrss.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2420
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\offc.dat"
        3⤵
        • Executes dropped EXE
        PID:3620
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\mess.dat"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2020
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\mail.dat"
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook accounts
        PID:228
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\dial.dat"
        3⤵
        • Executes dropped EXE
        PID:980
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\chro.dat"
        3⤵
        • Executes dropped EXE
        PID:2916
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\iexp.dat"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:3196
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\ptsg.dat"
        3⤵
        • Executes dropped EXE
        PID:224
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\ffox.dat"
        3⤵
        • Executes dropped EXE
        PID:3936
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\opra.dat"
        3⤵
        • Executes dropped EXE
        PID:2128
    • C:\Users\Admin\AppData\Roaming\csrss.exe
      C:\Users\Admin\AppData\Roaming\csrss.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:684
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1056
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:4788
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\uncrypt.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\uncrypt.exe:*:Enabled:Windows Messanger" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3056
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\uncrypt.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\uncrypt.exe:*:Enabled:Windows Messanger" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:4568
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:936
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:3932
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\csrss.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\csrss.exe:*:Enabled:Windows Messanger" /f
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4328
        • C:\Windows\SysWOW64\reg.exe
          REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\csrss.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\csrss.exe:*:Enabled:Windows Messanger" /f
          4⤵
          • Modifies firewall policy service
          • Modifies registry key
          PID:2316

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

3
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

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

    1KB

    MD5

    bd1829843641d264c9ef57ee175a68ae

    SHA1

    298cdbc7f30583f964a6533bf62fb7aff501aa52

    SHA256

    87cff8f9ae3660c6ff6fc7d6262c61b7c19b2271ae9a95abe7b9d744d386259c

    SHA512

    6165d8d47c2e32407c0888b28989ae293f592c4e4771e43d8d09d303e3ad73f895f1c852a176677b3fbd78449536579570cac67a17b2e9135774236b159b2827

  • C:\Users\Admin\AppData\Roaming\dial.dat
    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Roaming\offc.dat
    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • memory/224-83-0x0000000000400000-0x0000000000410000-memory.dmp
    Filesize

    64KB

  • memory/224-86-0x0000000000400000-0x0000000000410000-memory.dmp
    Filesize

    64KB

  • memory/224-87-0x0000000000400000-0x0000000000410000-memory.dmp
    Filesize

    64KB

  • memory/228-45-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/228-48-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/228-49-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/228-50-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/228-51-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/684-111-0x0000000000400000-0x000000000046F000-memory.dmp
    Filesize

    444KB

  • memory/684-18-0x0000000000400000-0x000000000046F000-memory.dmp
    Filesize

    444KB

  • memory/684-11-0x0000000000400000-0x000000000046F000-memory.dmp
    Filesize

    444KB

  • memory/684-113-0x0000000000400000-0x000000000046F000-memory.dmp
    Filesize

    444KB

  • memory/684-69-0x0000000000400000-0x000000000046F000-memory.dmp
    Filesize

    444KB

  • memory/980-61-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/980-53-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/980-56-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/980-57-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/980-59-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2020-40-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2020-43-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2020-42-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2020-37-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2128-100-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/2128-103-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/2128-104-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/2128-107-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/2420-16-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2420-58-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2420-7-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2420-12-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2420-110-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2916-68-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2916-67-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2916-64-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2916-72-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2916-71-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/3196-80-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/3196-75-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/3196-79-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/3196-78-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/3196-81-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/3620-31-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/3620-30-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/3620-32-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/3620-34-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/3620-24-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/3924-17-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/3924-0-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/3924-3-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/3924-2-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/3924-1-0x00000000015F0000-0x0000000001600000-memory.dmp
    Filesize

    64KB

  • memory/3936-97-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/3936-94-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/3936-92-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/3936-89-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB