Analysis

  • max time kernel
    118s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    24-04-2024 23:28

General

  • Target

    7a74ed328443eb94aa5e86bdb1288eaf1db43a244eb362896ffb907d09544c0c.exe

  • Size

    311KB

  • MD5

    afc0b8916ea8292e71ddef2c1ae9cf0c

  • SHA1

    70548d1306750c8f930644682c8b3b199a3dae61

  • SHA256

    7a74ed328443eb94aa5e86bdb1288eaf1db43a244eb362896ffb907d09544c0c

  • SHA512

    073b656935b846f133ac421ada5d17b08407cd9f7683d32a5f0941230f518eb7205a28c9009e2087c841586fd9d779c2b41eb7aed07079e06611dec152fe2619

  • SSDEEP

    3072:sr85CaODKYILKWnAn6Kk4EmuV2PGNQ+aRgMPqJ1mAWroY46rhNvsrhNG21sqeRIZ:k9aO+YILKWAn1fE2Dr4EAoohCe1szq9

Malware Config

Signatures

  • Detect Neshta payload 6 IoCs
  • Neshta

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 7 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 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).

  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7a74ed328443eb94aa5e86bdb1288eaf1db43a244eb362896ffb907d09544c0c.exe
    "C:\Users\Admin\AppData\Local\Temp\7a74ed328443eb94aa5e86bdb1288eaf1db43a244eb362896ffb907d09544c0c.exe"
    1⤵
    • Loads dropped DLL
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2980
    • C:\Users\Admin\AppData\Local\Temp\3582-490\7a74ed328443eb94aa5e86bdb1288eaf1db43a244eb362896ffb907d09544c0c.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\7a74ed328443eb94aa5e86bdb1288eaf1db43a244eb362896ffb907d09544c0c.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1888
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -u -p 1888 -s 32
        3⤵
        • Loads dropped DLL
        PID:1132

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Privilege Escalation

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Defense Evasion

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

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\7a74ed328443eb94aa5e86bdb1288eaf1db43a244eb362896ffb907d09544c0c.exe
    Filesize

    270KB

    MD5

    38fd79568b52429342e86b7c0eb791d7

    SHA1

    2d87bb4619f560dcdd29f82050cda7759233f54c

    SHA256

    9f70794141b705429fd88c42142577d62c0b4691a92c758dcf89ff1fd959c7fb

    SHA512

    9b490c6a29e585c202e6dc31540fd7d0d850f025b5325d11c2ccb7046b6419f8f5511736f9c75e86165d1b865cea1f0928b388e1a264ac3b2bdbcc4ec699bb37

  • memory/2980-89-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/2980-90-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/2980-91-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/2980-92-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/2980-94-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB