Analysis

  • max time kernel
    62s
  • max time network
    64s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    11-01-2023 15:46

General

  • Target

    file.exe

  • Size

    1.3MB

  • MD5

    59e32621d0d3aa5ed8cc250271bf3310

  • SHA1

    2fd16deb0eb99f27e84276e8209b3d707f8f65cc

  • SHA256

    132a92279a68da67013764bd0b25422d973e1325b3feb356b4a1a099d2188707

  • SHA512

    4eb3b3dfd95b2137c363a7b73e446a3a90b7fd485d5668d9de5e1fec137b27fa81f349c7f60383888ae4973c9e4b18f0f4657a9a1a97edc4a19a349819a72bcb

  • SSDEEP

    24576:q20Itvp18p59he2FNqB8x9M71hUNPpPcQ3H5gXC75ld1qSVpk:q2NpCpPfFNc8xK7sfBd1qapk

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 6 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 1 IoCs
  • Suspicious use of WriteProcessMemory 23 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:1516
    • C:\Users\Admin\AppData\Local\Temp\is-KFCFG.tmp\file.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-KFCFG.tmp\file.tmp" /SL5="$70022,1087867,212992,C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1520
      • C:\Program Files (x86)\Split Files\LitFiles137.exe
        "C:\Program Files (x86)\Split Files\LitFiles137.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1500
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\cLnvsakT.exe
          4⤵
          • Executes dropped EXE
          PID:1188
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "LitFiles137.exe" /f & erase "C:\Program Files (x86)\Split Files\LitFiles137.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:660
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "LitFiles137.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:892

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\Split Files\LitFiles137.exe

    Filesize

    1.8MB

    MD5

    3c4bc26905dfc89a4a61fb520b8131f7

    SHA1

    6a602a1062eb0a181136a9d3bb43f64f97fbe6cf

    SHA256

    1770e5d09b50f725c357b89b294ad9cb17291440e295689ecbff4fe74ea330e9

    SHA512

    a942811507515511f36257c1da0434bc575d61ef396c8ba4ffda609419ef5b11b93b4cac1b06ddedc7a668013dbf1f41db4b1e0646cb29e10221e3854c6abf6d

  • C:\Program Files (x86)\Split Files\LitFiles137.exe

    Filesize

    1.8MB

    MD5

    3c4bc26905dfc89a4a61fb520b8131f7

    SHA1

    6a602a1062eb0a181136a9d3bb43f64f97fbe6cf

    SHA256

    1770e5d09b50f725c357b89b294ad9cb17291440e295689ecbff4fe74ea330e9

    SHA512

    a942811507515511f36257c1da0434bc575d61ef396c8ba4ffda609419ef5b11b93b4cac1b06ddedc7a668013dbf1f41db4b1e0646cb29e10221e3854c6abf6d

  • C:\Users\Admin\AppData\Local\Temp\is-KFCFG.tmp\file.tmp

    Filesize

    695KB

    MD5

    415533bb40980951c966665cff9e2fe7

    SHA1

    fce396c8fa01876dd008f22c8be9a9b706f4aaec

    SHA256

    f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

    SHA512

    3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

  • C:\Users\Admin\AppData\Local\Temp\is-KFCFG.tmp\file.tmp

    Filesize

    695KB

    MD5

    415533bb40980951c966665cff9e2fe7

    SHA1

    fce396c8fa01876dd008f22c8be9a9b706f4aaec

    SHA256

    f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

    SHA512

    3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\LitFiles137.exe

    Filesize

    1.8MB

    MD5

    3c4bc26905dfc89a4a61fb520b8131f7

    SHA1

    6a602a1062eb0a181136a9d3bb43f64f97fbe6cf

    SHA256

    1770e5d09b50f725c357b89b294ad9cb17291440e295689ecbff4fe74ea330e9

    SHA512

    a942811507515511f36257c1da0434bc575d61ef396c8ba4ffda609419ef5b11b93b4cac1b06ddedc7a668013dbf1f41db4b1e0646cb29e10221e3854c6abf6d

  • \Users\Admin\AppData\Local\Temp\is-9HP4R.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • \Users\Admin\AppData\Local\Temp\is-9HP4R.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-9HP4R.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-KFCFG.tmp\file.tmp

    Filesize

    695KB

    MD5

    415533bb40980951c966665cff9e2fe7

    SHA1

    fce396c8fa01876dd008f22c8be9a9b706f4aaec

    SHA256

    f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

    SHA512

    3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1500-70-0x0000000000400000-0x00000000013C2000-memory.dmp

    Filesize

    15.8MB

  • memory/1500-79-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1500-73-0x0000000000400000-0x00000000013C2000-memory.dmp

    Filesize

    15.8MB

  • memory/1500-86-0x0000000000400000-0x00000000013C2000-memory.dmp

    Filesize

    15.8MB

  • memory/1500-71-0x0000000000400000-0x00000000013C2000-memory.dmp

    Filesize

    15.8MB

  • memory/1500-83-0x0000000000400000-0x00000000013C2000-memory.dmp

    Filesize

    15.8MB

  • memory/1500-78-0x0000000000400000-0x00000000013C2000-memory.dmp

    Filesize

    15.8MB

  • memory/1516-64-0x0000000000400000-0x000000000043B000-memory.dmp

    Filesize

    236KB

  • memory/1516-54-0x0000000075BD1000-0x0000000075BD3000-memory.dmp

    Filesize

    8KB

  • memory/1516-87-0x0000000000400000-0x000000000043B000-memory.dmp

    Filesize

    236KB

  • memory/1516-55-0x0000000000400000-0x000000000043B000-memory.dmp

    Filesize

    236KB

  • memory/1520-77-0x0000000003610000-0x00000000045D2000-memory.dmp

    Filesize

    15.8MB

  • memory/1520-69-0x0000000003610000-0x00000000045D2000-memory.dmp

    Filesize

    15.8MB