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Analysis

  • max time kernel
    62s
  • max time network
    65s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    02/01/2023, 21:40

General

  • Target

    file.exe

  • Size

    1.8MB

  • MD5

    27046698de7a3d6e5f5857108b4093a7

  • SHA1

    d3bb9760a390101f4ca5d445e357b357deb84b64

  • SHA256

    77c2f269bd667b5af744fb15bd8a4e303367e787e1418757cc92f44611049a7c

  • SHA512

    f2b91623b692cb38b8f6769c3ef7044ad67658e37f91c076967f5442d80c3aa4367b7beef7d8cec16f1f2a92c0b1a33b3a69625f4a477a007eec3fb6e35df9ca

  • SSDEEP

    49152:Ii/tvjCyUs6Hx5U/hRkqnDcdISuv21eo9IbKuKmRvLpFR+DI21MSBk3u:Ii/tvj8se1Cwugb9KKuKmRDpb+UHSBke

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 10 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Drops file in Program Files directory 17 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:864
    • C:\Users\Admin\AppData\Local\Temp\is-8OB55.tmp\is-M3TRL.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-8OB55.tmp\is-M3TRL.tmp" /SL4 $60120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1597539 93184
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1480
      • C:\Program Files (x86)\Split Files\SplitFiles128.exe
        "C:\Program Files (x86)\Split Files\SplitFiles128.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:2028
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Z7B22Jn.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1624
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles128.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles128.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1152
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles128.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1072

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Split Files\SplitFiles128.exe

    Filesize

    3.3MB

    MD5

    a68811083e82c7d58cccb9c431e475a6

    SHA1

    a48df7a8e2b7e6f3060cd5ba604f2214971ff216

    SHA256

    c631d87e6fa9bae8bad7a8375e7139cfa066d2c302dbcd6de3dbade263ea8334

    SHA512

    5adf29e6e89df27e7e5b8743744175165ca36223050063967d711746e923206e620d08eb17637255661d7227a541420cae9620109c2c98b5f80d3b9198ec18f9

  • C:\Program Files (x86)\Split Files\SplitFiles128.exe

    Filesize

    3.3MB

    MD5

    a68811083e82c7d58cccb9c431e475a6

    SHA1

    a48df7a8e2b7e6f3060cd5ba604f2214971ff216

    SHA256

    c631d87e6fa9bae8bad7a8375e7139cfa066d2c302dbcd6de3dbade263ea8334

    SHA512

    5adf29e6e89df27e7e5b8743744175165ca36223050063967d711746e923206e620d08eb17637255661d7227a541420cae9620109c2c98b5f80d3b9198ec18f9

  • C:\Users\Admin\AppData\Local\Temp\is-8OB55.tmp\is-M3TRL.tmp

    Filesize

    685KB

    MD5

    7f46188bafe719b5ba8e32c2e0037f21

    SHA1

    6dc19d768f6b24766cfcdf49f630b517174c780e

    SHA256

    3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

    SHA512

    5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

  • C:\Users\Admin\AppData\Local\Temp\is-8OB55.tmp\is-M3TRL.tmp

    Filesize

    685KB

    MD5

    7f46188bafe719b5ba8e32c2e0037f21

    SHA1

    6dc19d768f6b24766cfcdf49f630b517174c780e

    SHA256

    3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

    SHA512

    5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Z7B22Jn.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Z7B22Jn.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\SplitFiles128.exe

    Filesize

    3.3MB

    MD5

    a68811083e82c7d58cccb9c431e475a6

    SHA1

    a48df7a8e2b7e6f3060cd5ba604f2214971ff216

    SHA256

    c631d87e6fa9bae8bad7a8375e7139cfa066d2c302dbcd6de3dbade263ea8334

    SHA512

    5adf29e6e89df27e7e5b8743744175165ca36223050063967d711746e923206e620d08eb17637255661d7227a541420cae9620109c2c98b5f80d3b9198ec18f9

  • \Program Files (x86)\Split Files\SplitFiles128.exe

    Filesize

    3.3MB

    MD5

    a68811083e82c7d58cccb9c431e475a6

    SHA1

    a48df7a8e2b7e6f3060cd5ba604f2214971ff216

    SHA256

    c631d87e6fa9bae8bad7a8375e7139cfa066d2c302dbcd6de3dbade263ea8334

    SHA512

    5adf29e6e89df27e7e5b8743744175165ca36223050063967d711746e923206e620d08eb17637255661d7227a541420cae9620109c2c98b5f80d3b9198ec18f9

  • \Program Files (x86)\Split Files\SplitFiles128.exe

    Filesize

    3.3MB

    MD5

    a68811083e82c7d58cccb9c431e475a6

    SHA1

    a48df7a8e2b7e6f3060cd5ba604f2214971ff216

    SHA256

    c631d87e6fa9bae8bad7a8375e7139cfa066d2c302dbcd6de3dbade263ea8334

    SHA512

    5adf29e6e89df27e7e5b8743744175165ca36223050063967d711746e923206e620d08eb17637255661d7227a541420cae9620109c2c98b5f80d3b9198ec18f9

  • \Users\Admin\AppData\Local\Temp\is-8OB55.tmp\is-M3TRL.tmp

    Filesize

    685KB

    MD5

    7f46188bafe719b5ba8e32c2e0037f21

    SHA1

    6dc19d768f6b24766cfcdf49f630b517174c780e

    SHA256

    3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

    SHA512

    5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

  • \Users\Admin\AppData\Local\Temp\is-T16A9.tmp\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • \Users\Admin\AppData\Local\Temp\is-T16A9.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-T16A9.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Z7B22Jn.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Z7B22Jn.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Z7B22Jn.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/864-68-0x0000000000400000-0x000000000041D000-memory.dmp

    Filesize

    116KB

  • memory/864-98-0x0000000000400000-0x000000000041D000-memory.dmp

    Filesize

    116KB

  • memory/864-54-0x0000000076831000-0x0000000076833000-memory.dmp

    Filesize

    8KB

  • memory/864-55-0x0000000000400000-0x000000000041D000-memory.dmp

    Filesize

    116KB

  • memory/1480-86-0x0000000003810000-0x0000000004962000-memory.dmp

    Filesize

    17.3MB

  • memory/1480-73-0x0000000003810000-0x0000000004962000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-76-0x0000000001EB0000-0x0000000003002000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-75-0x0000000001EB0000-0x0000000003002000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-74-0x0000000000400000-0x0000000001552000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-87-0x0000000000400000-0x0000000001552000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-88-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/2028-92-0x0000000000400000-0x0000000001552000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-77-0x0000000000400000-0x0000000001552000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-78-0x0000000000400000-0x0000000001552000-memory.dmp

    Filesize

    17.3MB

  • memory/2028-97-0x0000000000400000-0x0000000001552000-memory.dmp

    Filesize

    17.3MB