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Analysis

  • max time kernel
    64s
  • max time network
    66s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    24/12/2022, 21:46

General

  • Target

    file.exe

  • Size

    1.7MB

  • MD5

    99838b7b07ad40e555b779128b2b512c

  • SHA1

    81549fe5c484886e3265b1c09c27df29bbad7484

  • SHA256

    b2f330125f6a09ebd5eaa88e5dcc582a34de1f3fb6997d1299180d678532b8a5

  • SHA512

    c06562a1861dedb05e9f2226fd974f180520ccb02d535f365763d146251f2f0d8237f1e9fe36d4fb693e35dbeeb3e89c83301d1cd27b67dc459e8ec2cb2861f9

  • SSDEEP

    49152:yiFXjLacmNJqXzfEsLSejK61els8CeFZaR:yiFzLacmNU4YSeHL8vFMR

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:1196
    • C:\Users\Admin\AppData\Local\Temp\is-TE1JI.tmp\is-G9HLI.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-TE1JI.tmp\is-G9HLI.tmp" /SL4 $60124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1583201 96256
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:896
      • C:\Program Files (x86)\Split Files\SplitFiles119.exe
        "C:\Program Files (x86)\Split Files\SplitFiles119.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1988
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lSDIvfa8W6Nl1.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1448
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles119.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles119.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:928
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles119.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1220

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Split Files\SplitFiles119.exe

    Filesize

    3.1MB

    MD5

    a8d4130dc39f7bf2e7c126c2148e0042

    SHA1

    d4e32f5863796d8edf96d5366727e9e16ceeae48

    SHA256

    fb81b6436bb26172e0dc3550d2f13e9bce4b8e42fb9c8b318369f01cf39d796e

    SHA512

    eba8b8cd2d92142293184c0a3d16cc47f8b50e6efb6a99b593449a3fe8deb9a93708a2a5469006a6c77d90170799f13e94dab60e9ad61d313fd53d92ca759448

  • C:\Program Files (x86)\Split Files\SplitFiles119.exe

    Filesize

    3.1MB

    MD5

    a8d4130dc39f7bf2e7c126c2148e0042

    SHA1

    d4e32f5863796d8edf96d5366727e9e16ceeae48

    SHA256

    fb81b6436bb26172e0dc3550d2f13e9bce4b8e42fb9c8b318369f01cf39d796e

    SHA512

    eba8b8cd2d92142293184c0a3d16cc47f8b50e6efb6a99b593449a3fe8deb9a93708a2a5469006a6c77d90170799f13e94dab60e9ad61d313fd53d92ca759448

  • C:\Users\Admin\AppData\Local\Temp\is-TE1JI.tmp\is-G9HLI.tmp

    Filesize

    687KB

    MD5

    ec5433295f9c12c2ac5bad1a56aa05b6

    SHA1

    ec15e0b4f070b25a2b074c235f0d6ec0b2778000

    SHA256

    a726a8996bdfca72a14eed5af6c7136bd195fb6c214326c5345d7ab1f08b4f84

    SHA512

    c866bdd9173f2a9efb2ed515ec0fa0f597d29e28c853c37dea5e94c059ec009c32ef430ae002ceff44920a847037f1dee5b45c8e99bbed121227f41c4d3f3737

  • C:\Users\Admin\AppData\Local\Temp\is-TE1JI.tmp\is-G9HLI.tmp

    Filesize

    687KB

    MD5

    ec5433295f9c12c2ac5bad1a56aa05b6

    SHA1

    ec15e0b4f070b25a2b074c235f0d6ec0b2778000

    SHA256

    a726a8996bdfca72a14eed5af6c7136bd195fb6c214326c5345d7ab1f08b4f84

    SHA512

    c866bdd9173f2a9efb2ed515ec0fa0f597d29e28c853c37dea5e94c059ec009c32ef430ae002ceff44920a847037f1dee5b45c8e99bbed121227f41c4d3f3737

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lSDIvfa8W6Nl1.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lSDIvfa8W6Nl1.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\SplitFiles119.exe

    Filesize

    3.1MB

    MD5

    a8d4130dc39f7bf2e7c126c2148e0042

    SHA1

    d4e32f5863796d8edf96d5366727e9e16ceeae48

    SHA256

    fb81b6436bb26172e0dc3550d2f13e9bce4b8e42fb9c8b318369f01cf39d796e

    SHA512

    eba8b8cd2d92142293184c0a3d16cc47f8b50e6efb6a99b593449a3fe8deb9a93708a2a5469006a6c77d90170799f13e94dab60e9ad61d313fd53d92ca759448

  • \Program Files (x86)\Split Files\SplitFiles119.exe

    Filesize

    3.1MB

    MD5

    a8d4130dc39f7bf2e7c126c2148e0042

    SHA1

    d4e32f5863796d8edf96d5366727e9e16ceeae48

    SHA256

    fb81b6436bb26172e0dc3550d2f13e9bce4b8e42fb9c8b318369f01cf39d796e

    SHA512

    eba8b8cd2d92142293184c0a3d16cc47f8b50e6efb6a99b593449a3fe8deb9a93708a2a5469006a6c77d90170799f13e94dab60e9ad61d313fd53d92ca759448

  • \Program Files (x86)\Split Files\SplitFiles119.exe

    Filesize

    3.1MB

    MD5

    a8d4130dc39f7bf2e7c126c2148e0042

    SHA1

    d4e32f5863796d8edf96d5366727e9e16ceeae48

    SHA256

    fb81b6436bb26172e0dc3550d2f13e9bce4b8e42fb9c8b318369f01cf39d796e

    SHA512

    eba8b8cd2d92142293184c0a3d16cc47f8b50e6efb6a99b593449a3fe8deb9a93708a2a5469006a6c77d90170799f13e94dab60e9ad61d313fd53d92ca759448

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-TE1JI.tmp\is-G9HLI.tmp

    Filesize

    687KB

    MD5

    ec5433295f9c12c2ac5bad1a56aa05b6

    SHA1

    ec15e0b4f070b25a2b074c235f0d6ec0b2778000

    SHA256

    a726a8996bdfca72a14eed5af6c7136bd195fb6c214326c5345d7ab1f08b4f84

    SHA512

    c866bdd9173f2a9efb2ed515ec0fa0f597d29e28c853c37dea5e94c059ec009c32ef430ae002ceff44920a847037f1dee5b45c8e99bbed121227f41c4d3f3737

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lSDIvfa8W6Nl1.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lSDIvfa8W6Nl1.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\lSDIvfa8W6Nl1.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/896-70-0x00000000038B0000-0x00000000049C2000-memory.dmp

    Filesize

    17.1MB

  • memory/896-87-0x00000000038B0000-0x00000000049C2000-memory.dmp

    Filesize

    17.1MB

  • memory/1196-54-0x0000000075D01000-0x0000000075D03000-memory.dmp

    Filesize

    8KB

  • memory/1196-55-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/1196-100-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/1196-68-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/1988-78-0x0000000000400000-0x0000000001512000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-77-0x0000000000400000-0x0000000001512000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-86-0x0000000000400000-0x0000000001512000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-76-0x0000000001980000-0x0000000002A92000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-88-0x0000000001980000-0x0000000002A92000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-89-0x0000000001980000-0x0000000002A92000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-90-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1988-94-0x0000000000400000-0x0000000001512000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-75-0x0000000001980000-0x0000000002A92000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-73-0x0000000000400000-0x0000000001512000-memory.dmp

    Filesize

    17.1MB

  • memory/1988-99-0x0000000000400000-0x0000000001512000-memory.dmp

    Filesize

    17.1MB