Analysis

  • max time kernel
    121s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    19-05-2024 23:16

General

  • Target

    737bf1c06ec2aa90cebbfa5c1e55225f19790864af0fc9034be1df4f251f9f1f.exe

  • Size

    1.8MB

  • MD5

    05367428bfe8267d4107bc1198a98547

  • SHA1

    303f2296e380f5978a75b1d5d11e990d5f047f6b

  • SHA256

    737bf1c06ec2aa90cebbfa5c1e55225f19790864af0fc9034be1df4f251f9f1f

  • SHA512

    efa392be5434d332ddb3ec9789cc1601d5880bc0c96e04da429bba8371b2b5c70e1b9349c3fa62bbf192767bf081ff3c6e469596441f2033a0c89986ffc2988a

  • SSDEEP

    49152:biAI3CyJ+mfZMfC6w7XDDtqhkyCAdqpHj1g7:3yUH6dXPUhkyYji

Malware Config

Signatures

  • 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).

  • NSIS installer 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\737bf1c06ec2aa90cebbfa5c1e55225f19790864af0fc9034be1df4f251f9f1f.exe
    "C:\Users\Admin\AppData\Local\Temp\737bf1c06ec2aa90cebbfa5c1e55225f19790864af0fc9034be1df4f251f9f1f.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:844
    • C:\Users\Admin\AppData\Local\Temp\3582-490\737bf1c06ec2aa90cebbfa5c1e55225f19790864af0fc9034be1df4f251f9f1f.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\737bf1c06ec2aa90cebbfa5c1e55225f19790864af0fc9034be1df4f251f9f1f.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: GetForegroundWindowSpam
      PID:3056

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\DW20.EXE
    Filesize

    859KB

    MD5

    754309b7b83050a50768236ee966224f

    SHA1

    10ed7efc2e594417ddeb00a42deb8fd9f804ed53

    SHA256

    acd32dd903e5464b0ecd153fb3f71da520d2e59a63d4c355d9c1874c919d04e6

    SHA512

    e5aaddf62c08c8fcc1ae3f29df220c5c730a2efa96dd18685ee19f5a9d66c4735bb4416c4828033661990604669ed345415ef2dc096ec75e1ab378dd804b1614

  • C:\Users\Admin\AppData\Local\Temp\nso1315.tmp\ioSpecial.ini
    Filesize

    721B

    MD5

    fc942e15bec7c933fab2766a4a6231bf

    SHA1

    448d83e52a230bf4206a9788b44d09722401ec72

    SHA256

    992a72088a941dfb6af3f4b5aa46fdae08e383304b39eac4f00031fd79ee8f6f

    SHA512

    a8dc5ce9de9367e8c70468f260ed6e303bd3fd6f814ab775db599c1596c8e5338096780e8f21d39749ca30b75edb638941ed02531dfb569543378e5780b614a8

  • C:\Users\Admin\AppData\Local\Temp\nso1315.tmp\ioSpecial.ini
    Filesize

    760B

    MD5

    28e967a471eb41f1f22f08ba39afe47a

    SHA1

    90a35b3e3203082183602b3511c4669acadaca14

    SHA256

    e6c075bdd861cca81e1cae5ec7ffbeff0d711ad8dda015292a7f209a1b735d5a

    SHA512

    afc87d066ac2552e9f31f65e1d5f5172c996ce0be27fe51ddc663f71fb389d25490b37c60320130c31d78fc38a90d8235a7ebec41155006c33c81b3d9ccf6704

  • \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\737bf1c06ec2aa90cebbfa5c1e55225f19790864af0fc9034be1df4f251f9f1f.exe
    Filesize

    1.7MB

    MD5

    8f50877e925166dbbfe477cc199d28c4

    SHA1

    4c515f4d7795fe07666859f26435b993803ef6a2

    SHA256

    03ec0ee2b9da158d766379d5cc72d6364883b4f340278d0b7c009c87ed88c649

    SHA512

    de586323877773d502b599cce992825d0fe5bddd8b4990834f060235a9c3af95ef9eb62a4c866b5a4569281a3c6d464f6bedffd7744a62316ece363e391bf225

  • \Users\Admin\AppData\Local\Temp\nso1315.tmp\InstallOptions.dll
    Filesize

    14KB

    MD5

    296a5f3179fa8d7a7a855eaf696ede44

    SHA1

    57aa5b71553ed282dd22c768e039a187f5c13f63

    SHA256

    ee0ad77e681c4d0fdf1d67df5f4ca03e6bdd8e3b05dfb47a83ad5c733ed62960

    SHA512

    bc527d1485f468e8d098057e0e38e8cb7aa6eb64d4ca30927b99b1552a3177b132b989015ff95bdf2ca046bf11a54b4b456f51e024fbc734fbb548c3499e53f6

  • \Users\Admin\AppData\Local\Temp\nso1315.tmp\LangDLL.dll
    Filesize

    5KB

    MD5

    fbbf9da918557aba6fa6e166a95ee8dd

    SHA1

    abbd02abae00172971a2e9cef62dab3b562f90c7

    SHA256

    dc7daec6f47e63b5d001cd648d40d93c29be6f2c95fe8b212dbb4d94d31cb12d

    SHA512

    0f877a9e5c6eb06374f0f19f92a6ea55b09998c42c67b16db680918e3e0c2023d511893173f76dde60a47ffe916b0d9af09b6255a158fa3e0743dc54d2a35a65

  • memory/844-171-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB

  • memory/844-173-0x0000000000400000-0x000000000041B000-memory.dmp
    Filesize

    108KB