Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • Nirsoft 19 IoCs
  • Executes dropped EXE 11 IoCs
  • Loads dropped DLL 7 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 39 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
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 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⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2928
    • C:\Users\Admin\AppData\Roaming\csrss.exe
      C:\Users\Admin\AppData\Roaming\csrss.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2856
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\offc.dat"
        3⤵
        • Executes dropped EXE
        PID:2672
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\mess.dat"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2600
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\mail.dat"
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook accounts
        PID:2792
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\dial.dat"
        3⤵
        • Executes dropped EXE
        PID:2480
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\chro.dat"
        3⤵
        • Executes dropped EXE
        PID:2536
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\iexp.dat"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1700
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\ptsg.dat"
        3⤵
        • Executes dropped EXE
        PID:2528
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\ffox.dat"
        3⤵
        • Executes dropped EXE
        PID:952
      • C:\Users\Admin\AppData\Roaming\csrss.exe
        /stext "C:\Users\Admin\AppData\Roaming\opra.dat"
        3⤵
        • Executes dropped EXE
        PID:1592
    • C:\Users\Admin\AppData\Roaming\csrss.exe
      C:\Users\Admin\AppData\Roaming\csrss.exe
      2⤵
      • Executes dropped EXE
      PID:2192

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

1
T1012

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

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

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

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

    1KB

    MD5

    fef019dd1b10e536c0b5100b0f4e30ff

    SHA1

    2c23474f60ea806fcc9ceb1edbf894e701bb68cd

    SHA256

    1e7746d9717f5453c804cfe743b68cc4056b0afbb82976866b47f303c8e8c467

    SHA512

    f554667494904d4edb88e7b8934e365bbe0224ccdec7c4b756eef0f57f082536f82f3b0c0471b3610b419e1b2ed928d549316a8fd1b2fa988757cf8e24cd0cc6

  • \Users\Admin\AppData\Roaming\csrss.exe
    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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

    1KB

    MD5

    bd1829843641d264c9ef57ee175a68ae

    SHA1

    298cdbc7f30583f964a6533bf62fb7aff501aa52

    SHA256

    87cff8f9ae3660c6ff6fc7d6262c61b7c19b2271ae9a95abe7b9d744d386259c

    SHA512

    6165d8d47c2e32407c0888b28989ae293f592c4e4771e43d8d09d303e3ad73f895f1c852a176677b3fbd78449536579570cac67a17b2e9135774236b159b2827

  • memory/952-98-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/952-96-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/952-94-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/952-91-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/1592-105-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/1592-107-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/1592-104-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/1592-101-0x0000000000400000-0x0000000000419000-memory.dmp
    Filesize

    100KB

  • memory/1700-82-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/1700-83-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/1700-80-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/1700-77-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/2192-20-0x0000000000400000-0x000000000046F000-memory.dmp
    Filesize

    444KB

  • memory/2480-60-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2480-56-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2480-61-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2480-62-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2480-64-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2528-89-0x0000000000400000-0x0000000000410000-memory.dmp
    Filesize

    64KB

  • memory/2528-85-0x0000000000400000-0x0000000000410000-memory.dmp
    Filesize

    64KB

  • memory/2528-88-0x0000000000400000-0x0000000000410000-memory.dmp
    Filesize

    64KB

  • memory/2536-67-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2536-74-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2536-72-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2536-70-0x0000000000400000-0x000000000043E000-memory.dmp
    Filesize

    248KB

  • memory/2600-43-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2600-45-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2600-46-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2600-40-0x0000000000400000-0x0000000000425000-memory.dmp
    Filesize

    148KB

  • memory/2672-34-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2672-30-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2672-33-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2672-36-0x0000000000400000-0x0000000000418000-memory.dmp
    Filesize

    96KB

  • memory/2792-49-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/2792-53-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/2792-52-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/2792-54-0x0000000000400000-0x000000000041F000-memory.dmp
    Filesize

    124KB

  • memory/2856-25-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2856-59-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2856-23-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2856-11-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2856-110-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2856-112-0x0000000000400000-0x00000000004AE000-memory.dmp
    Filesize

    696KB

  • memory/2928-0-0x0000000074690000-0x0000000074C3B000-memory.dmp
    Filesize

    5.7MB

  • memory/2928-24-0x0000000074690000-0x0000000074C3B000-memory.dmp
    Filesize

    5.7MB

  • memory/2928-2-0x0000000002370000-0x00000000023B0000-memory.dmp
    Filesize

    256KB

  • memory/2928-1-0x0000000074690000-0x0000000074C3B000-memory.dmp
    Filesize

    5.7MB