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Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    03/12/2024, 20:27

General

  • Target

    Utilman.exe

  • Size

    709KB

  • MD5

    83aba31021b2d4613af088f11f784301

  • SHA1

    906a0876fc94ad2e4ea10b3d6d61ca6788f1922d

  • SHA256

    de8f674e914b11d418860730c0297cd0a0ea44aa3d2bd58053d2c9a5b259a987

  • SHA512

    16cd85c45a035425ae9428ec657c60b2ce5c2bc8623385d46fa05896a5fd6ce61a93abe069cb11e0f8fd3ee98cd83319e6b09580fef6b8b57a6163a8592ec079

  • SSDEEP

    12288:U9tpJ9zb1wqWIjX0n6j/PKJc3G5OF8wBjmqU888888888888W888888888884HMT:6ttzBwqWUX0c/W55GtQUMLIbvO

Malware Config

Signatures

  • Detect Neshta payload 3 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Neshta family
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Accessibility Features 1 TTPs

    Windows contains accessibility features that may be used by adversaries to establish persistence and/or elevate privileges.

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Utilman.exe
    "C:\Users\Admin\AppData\Local\Temp\Utilman.exe"
    1⤵
    • Loads dropped DLL
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2084
    • C:\Users\Admin\AppData\Local\Temp\3582-490\Utilman.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\Utilman.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3008

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\MSOCache\ALLUSE~1\{90140~1\dwtrig20.exe

    Filesize

    547KB

    MD5

    cf6c595d3e5e9667667af096762fd9c4

    SHA1

    9bb44da8d7f6457099cb56e4f7d1026963dce7ce

    SHA256

    593e60cc30ae0789448547195af77f550387f6648d45847ea244dd0dd7abf03d

    SHA512

    ff4f789df9e6a6d0fbe12b3250f951fcf11e857906c65e96a30bb46266e7e1180d6103a03db2f3764e0d1346b2de7afba8259ba080057e4a268e45e8654dfa80

  • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE

    Filesize

    252KB

    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • \Users\Admin\AppData\Local\Temp\3582-490\Utilman.exe

    Filesize

    669KB

    MD5

    660158b03c50e0bbc9a3b0821c89434d

    SHA1

    79ca4437ffa533bf1f711929621509f72ee199ab

    SHA256

    06b838ab8356069aa14e89af36236d0ef8499adac0c6646fc0f9d86e39b0adb5

    SHA512

    5f2474616edaaea39066b6400b3937ebe91896067af16312a713ad250ece5705e64a42cabd67eaaff880524e0fcf44b8131a72aa6a02c4dcb68aeb4719607559

  • memory/2084-86-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/2084-88-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/3008-9-0x0000000000230000-0x0000000000231000-memory.dmp

    Filesize

    4KB

  • memory/3008-85-0x0000000000400000-0x00000000004AC000-memory.dmp

    Filesize

    688KB