Analysis

  • max time kernel
    16s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    04-08-2024 17:12

General

  • Target

    aaa/WinlockerVB6Blacksod.exe

  • Size

    2.4MB

  • MD5

    dbfbf254cfb84d991ac3860105d66fc6

  • SHA1

    893110d8c8451565caa591ddfccf92869f96c242

  • SHA256

    68b0e1932f3b4439865be848c2d592d5174dbdbaab8f66104a0e5b28c928ee0c

  • SHA512

    5e9ccdf52ebdb548c3fa22f22dd584e9a603ca1163a622db5707dbcc5d01e4835879dcfd28cb1589cbb25aed00f352f7a0a0962b1f38b68fc7d6693375e7666d

  • SSDEEP

    49152:6kAG2QGTC5xvMdgpdb1KRHGepUu2cGbqPs9+q2HRPTnFVSLE:6kAjQGTCnvMmpYQqPNRPTnF4Y

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Loads dropped DLL 15 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Enumerates connected drives 3 TTPs 64 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 19 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Modifies data under HKEY_USERS 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aaa\WinlockerVB6Blacksod.exe
    "C:\Users\Admin\AppData\Local\Temp\aaa\WinlockerVB6Blacksod.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2356
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\system32\msiexec.exe" /i "C:\Users\Admin\AppData\Roaming\Windows\Error file remover 1.0.0.0\install\0A01606\Error file remover.msi" AI_SETUPEXEPATH=C:\Users\Admin\AppData\Local\Temp\aaa\WinlockerVB6Blacksod.exe SETUPEXEDIR=C:\Users\Admin\AppData\Local\Temp\aaa\ EXE_CMD_LINE="/exenoupdates /exelang 0 /noprereqs "
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:2944
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Modifies WinLogon for persistence
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2804
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding DB3C173447DCC405DC491527856EADE9
      2⤵
      • Loads dropped DLL
      • Blocklisted process makes network request
      • System Location Discovery: System Language Discovery
      PID:2864
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding C7C086F41B2758037E1BFCB14318A088 M Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      PID:972

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Config.Msi\f76d953.rbs

    Filesize

    99KB

    MD5

    ecc519fdbcf50896b5505bb759d6f26b

    SHA1

    aa01977844790d5c6e5631d3684124095c57fe75

    SHA256

    a053ab1152b9042b7f530681d02e2f1142d865b6b57bf853bf63d22b93ef4a18

    SHA512

    f33ef62be5e22e3459abe001107a1b3d53083963ae2479cb9272929282d47bbc3bcb2ec3d0e45de10f95e5b7a237bf5fab3af11ff0827f89a6c1f504bca95092

  • C:\Users\Admin\AppData\Local\Temp\AdvinstAnalytics\Error file remover\1.0.0.0\tracking.ini

    Filesize

    84B

    MD5

    a1aaa8ec6f66fd583db27e01b6711ed0

    SHA1

    7961d24e7091ff7d0419f4e636162676a7209478

    SHA256

    6ee7286c41065fbe8833d457e61c36933d1fadef362b1798805f0ec69578d208

    SHA512

    0f32e51276634237c3f5fc243a8ba374bfb1bec24907629fc27f88ebfedebd5683ffe12da19082512c0a1983c88fed24eb06075a4d3e359d6af41b4b8224c3c9

  • C:\Users\Admin\AppData\Local\Temp\AdvinstAnalytics\Error file remover\1.0.0.0\tracking.ini

    Filesize

    84B

    MD5

    d6ee51dd8472b47773ebec68f7c20d19

    SHA1

    ca37f38d92aa7b543dbcdc3f66eb6c6ffd700777

    SHA256

    9223e419766b281f2c9befcc9637364b5da8a0629a14c111e17ec5f2d0ef48a9

    SHA512

    067fb9898598c800e59abe4af024dba6b49204814d1e97641222b67a5140a282fb474aa8e5731019e563da5181152c0289a1401feb7f60b2f77b3051e6a9ad41

  • C:\Users\Admin\AppData\Local\Temp\AdvinstAnalytics\Error file remover\1.0.0.0\{4459F840-B36D-4C33-A589-CCC6D9846B85}.session

    Filesize

    4KB

    MD5

    c5270870db46a406b52ea27b8110d025

    SHA1

    f5c546583c258834ab88199c99ea249b5396f7e3

    SHA256

    0a62717ba3b55fbbcd650ae6a6bdf989d0396349b7500ff2460c4b4c769d82c9

    SHA512

    fe3419ceb34937156af4ba925b7cd37d2aecd790ae1ac45f000b395f66c6c58ba3642692ae669a769df91181a7c9b6c273bd78066dfd1ceb293f6ce97587a0d4

  • C:\Users\Admin\AppData\Roaming\Windows\Error file remover 1.0.0.0\install\0A01606\Error file remover.msi

    Filesize

    1010KB

    MD5

    27bc9540828c59e1ca1997cf04f6c467

    SHA1

    bfa6d1ce9d4df8beba2bedf59f86a698de0215f3

    SHA256

    05c18698c3dc3b2709afd3355ad5b91a60b2121a52e5fcc474e4e47fb8e95e2a

    SHA512

    a3ae822116cddb52d859de7ffc958541bb47c355a835c5129aade9cc0e5fba3ff25387061deb5b55b5694a535f09fe8669485282eb6e7c818cc7092eb3392848

  • C:\Users\Admin\AppData\Roaming\Windows\Error file remover 1.0.0.0\install\0A01606\Windows Logoff Sound.wav

    Filesize

    724KB

    MD5

    bab1293f4cf987216af8051acddaf97f

    SHA1

    00abe5cfb050b4276c3dd2426e883cd9e1cde683

    SHA256

    bc26b1b97eeb45995bbd5f854db19f994cce1bb9ac9fb625eb207302dccdf344

    SHA512

    3b44371756f069be4f70113a09761a855d80e96c23c8cd76d0c19a43e93d1a159af079ba5189b88b5ee2c093099a02b00ea4dc20a498c9c0c2df7dc95e5ddd49

  • C:\Users\Admin\AppData\Roaming\Windows\Error file remover 1.0.0.0\install\0A01606\fatalerror.exe

    Filesize

    24KB

    MD5

    e579c5b3c386262e3dd4150eb2b13898

    SHA1

    5ab7b37956511ea618bf8552abc88f8e652827d3

    SHA256

    e9573a3041e5a45ed8133576d199eb8d12f8922bbe47d194fef9ac166a96b9e2

    SHA512

    9cf947bad87a701f0e0ad970681767e64b7588089cd9064c72bf24ba6ca0a922988f95b141b29a68ae0e0097f03a66d9b25b9d52197ff71f6e369cde0438e0bb

  • C:\Users\Admin\AppData\Roaming\Windows\Error file remover 1.0.0.0\install\decoder.dll

    Filesize

    126KB

    MD5

    3531cf7755b16d38d5e9e3c43280e7d2

    SHA1

    19981b17ae35b6e9a0007551e69d3e50aa1afffe

    SHA256

    76133e832c15aa5cbc49fb3ba09e0b8dd467c307688be2c9e85e79d3bf62c089

    SHA512

    7b053ba2cf92ef2431b98b2a06bd56340dad94de36d11e326a80cd61b9acb378ac644ac407cf970f4ef8333b8d3fb4ff40b18bb41ec5aee49d79a6a2adcf28fd

  • C:\Windows\Installer\MSID99D.tmp

    Filesize

    180KB

    MD5

    d552dd4108b5665d306b4a8bd6083dde

    SHA1

    dae55ccba7adb6690b27fa9623eeeed7a57f8da1

    SHA256

    a0367875b68b1699d2647a748278ebce64d5be633598580977aa126a81cf57c5

    SHA512

    e5545a97014b5952e15bb321135f65c0e24414f8dd606fe454fd2d048d3f769b9318df7cfb2a6bf932eb2bf6d79811b93cb2008115deb0f0fa9db07f32a70969

  • C:\Windows\Installer\MSIDA89.tmp

    Filesize

    88KB

    MD5

    4083cb0f45a747d8e8ab0d3e060616f2

    SHA1

    dcec8efa7a15fa432af2ea0445c4b346fef2a4d6

    SHA256

    252b7423b01ff81aea6fe7b40de91abf49f515e9c0c7b95aa982756889f8ac1a

    SHA512

    26f8949cad02334f9942fda8509579303b81b11bc052a962c5c31a7c6c54a1c96957f30ee241c2206d496d2c519d750d7f6a12b52afdb282fa706f9fee385133

  • C:\Windows\Installer\MSIDD5B.tmp

    Filesize

    96KB

    MD5

    3cab78d0dc84883be2335788d387601e

    SHA1

    14745df9595f190008c7e5c190660361f998d824

    SHA256

    604e79fe970c5ed044517a9a35e4690ea6f7d959d21173ebef45cdd3d3a22bdd

    SHA512

    df6b49f2b5cddebd7e23e81b0f89e4883fc12d95735a9b3f84d2f402f4996c54b5fdea8adb9eaa98e8c973b089656d18d6b322bd71cb42d7807f7fa8a7348820

  • C:\Windows\Installer\MSIDD7B.tmp

    Filesize

    128KB

    MD5

    7e6b88f7bb59ec4573711255f60656b5

    SHA1

    5e7a159825a2d2cb263a161e247e9db93454d4f6

    SHA256

    59ff5bc12b155cc2e666bd8bc34195c3750eb742542374fc5e53fb22d11e862f

    SHA512

    294a379c99403f928d476e04668717cdabc7dc3e33bcf6bcad5c3d93d4268971811ff7303aa5b4b2ed2b59d59c8eba350a9a30888d4b5b3064708521ac21439c

  • C:\Windows\Installer\MSIDD9C.tmp

    Filesize

    312KB

    MD5

    aa82345a8f360804ea1d8d935f0377aa

    SHA1

    c09cf3b1666d9192fa524c801bb2e3542c0840e2

    SHA256

    9c155d4214cebda186647c035ada552963dcac8f88a6b38a23ea34f9ecd1d437

    SHA512

    c051a381d87ba933ea7929c899fb01af2207cb2462dcb2b55c28cff65596b27bdb05a48207624eeea40fddb85003133ad7af09ca93cfb2426c155daea5a9a6db