Analysis

  • max time kernel
    105s
  • max time network
    64s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    20-01-2021 16:13

General

  • Target

    iym.exe

  • Size

    20KB

  • MD5

    9d1c8d505aed4eb37bd5530a0b5b3b10

  • SHA1

    8727180dafb631c287957dedbcc4f989fb0a5825

  • SHA256

    1730e8fd738a26adbe3f0b31192adf6d4cc175f021b2d06e6278e36a43efef40

  • SHA512

    0a1776064a7a82a53881036ed2b3ab9a30f0c842c826543202cbf6399cb10f6ca2544e95672e87ab59c84d5778544aa89dfaa802ab843aa57bf6bcbeb4f27bea

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • Windows security bypass 2 TTPs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Drops startup file 2 IoCs
  • Windows security modification 2 TTPs 9 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 14 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\iym.exe
    "C:\Users\Admin\AppData\Local\Temp\iym.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks BIOS information in registry
    • Drops startup file
    • Windows security modification
    • Adds Run key to start application
    • Maps connected drives based on registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:776
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\iym.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:960
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\iym.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:516
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\iym.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:792
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\iym.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1804
    • C:\Users\Admin\AppData\Local\Temp\iym.exe
      "C:\Users\Admin\AppData\Local\Temp\iym.exe"
      2⤵
        PID:1976
      • C:\Users\Admin\AppData\Local\Temp\iym.exe
        "C:\Users\Admin\AppData\Local\Temp\iym.exe"
        2⤵
          PID:1956
        • C:\Users\Admin\AppData\Local\Temp\iym.exe
          "C:\Users\Admin\AppData\Local\Temp\iym.exe"
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2032
        • C:\Users\Admin\AppData\Local\Temp\iym.exe
          "C:\Users\Admin\AppData\Local\Temp\iym.exe"
          2⤵
            PID:676
          • C:\Users\Admin\AppData\Local\Temp\iym.exe
            "C:\Users\Admin\AppData\Local\Temp\iym.exe"
            2⤵
              PID:1404

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_38db1a99-670b-4b7e-aece-1bdcc153eef7

            MD5

            a70ee38af4bb2b5ed3eeb7cbd1a12fa3

            SHA1

            81dbaeae4b0f9e1adc0a1e3d6d76a12396498ba9

            SHA256

            dd2f41f92f19c3fe031bdf5da68ab06768e26762d0077b290cd0094df1d5d58d

            SHA512

            8c69a5300c7545c5c4b25a0594e6813b6b7a85b5f3ae7fc5464b4074fe6f50b2f49d31cacf19bc20a02bb8e237656f1b9b2a3f6a3953e3a8478ca2adc154e0e3

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_3bf4f350-86fe-486e-8b87-41ab96d0ad9c

            MD5

            b6d38f250ccc9003dd70efd3b778117f

            SHA1

            d5a17c02cac698d4f0a4a9b7d71db2aa19e3f18a

            SHA256

            4de9d7b5ccab7b67ca8efc83084c7ee6e5e872b7216ed4683bc5da950bf41265

            SHA512

            67d8195836b7f280d3f9219fd0f58276342e55d5dfdd8a4c54355030d96685d73f1b2b6da0eb39322ec7c3a1d1c5ef06b52d22646cea30a96f822de1800d31e9

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_4408bb97-19ee-4815-b02c-5a0939dddad8

            MD5

            df44874327d79bd75e4264cb8dc01811

            SHA1

            1396b06debed65ea93c24998d244edebd3c0209d

            SHA256

            55de642c5c9e436ec01c57004dae797022442c3245daf7162d19a5585f221181

            SHA512

            95dc9298b8db059bbe746f67e6a7f8515781c7053cc60c01532e47623a996be7e1bd23d1bd8f5f2045adff27454f44930d503c15b695690088841cedbd2a06c3

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_644b5728-e9b5-45ab-9104-7136ec814422

            MD5

            be4d72095faf84233ac17b94744f7084

            SHA1

            cc78ce5b9c57573bd214a8f423ee622b00ebb1ec

            SHA256

            b0d72c5c22e57913476ac8fc686a4593f137c6667d5094522c0a0685dabd7adc

            SHA512

            43856e9b1032b8690ceea810c931bed3655e9190414bb220fb6afc136f31b8335e07604dffb28405d4006f266a54cff424c527d29924b1b732c9647a3252b097

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_6532a425-51ae-4577-837f-c6e09d9fcfcf

            MD5

            75a8da7754349b38d64c87c938545b1b

            SHA1

            5c28c257d51f1c1587e29164cc03ea880c21b417

            SHA256

            bf08151c174b5d00c9dbc7907b2c6a01b4be76bfa3afce1e8bd98a04ad833c96

            SHA512

            798797bc74c56c874e9a5fdcb0157c04e37a1b3cce285ef064b01bceef8cec45f11a5198918c6c647220b62883606b5e12e3cca3ea369f3a66e69dea6e15f643

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_69670b6c-d49a-42a9-993a-10d18807f7c6

            MD5

            5e3c7184a75d42dda1a83606a45001d8

            SHA1

            94ca15637721d88f30eb4b6220b805c5be0360ed

            SHA256

            8278033a65d1ff48be4d86e11f87930d187692f59f8bf2f0a9d170de285afb59

            SHA512

            fae99b6e9b106e0f1c30aa4082b25ae1ad643455c1295c2c16ad534e3e611b9b08492353ffe1af1cfdddc9b2b7c330747a64012c45e62b8f4a4982dcc214e05b

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_7f45a795-9723-4ae3-b7ea-79ea7f92b87a

            MD5

            a725bb9fafcf91f3c6b7861a2bde6db2

            SHA1

            8bb5b83f3cc37ff1e5ea4f02acae38e72364c114

            SHA256

            51651f27f54c7261887037aa1de4eff0a26c6807906dfc34a15cd5a0b58a8431

            SHA512

            1c4b21dd5660bfec8347257bb3da64681b0a97c427790d9ab3484f687dac032bcff0e07876635953697b00cf83e7d37f97c44e0219627fd0533f60ed3024b97e

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_7f45a795-9723-4ae3-b7ea-79ea7f92b87a

            MD5

            a725bb9fafcf91f3c6b7861a2bde6db2

            SHA1

            8bb5b83f3cc37ff1e5ea4f02acae38e72364c114

            SHA256

            51651f27f54c7261887037aa1de4eff0a26c6807906dfc34a15cd5a0b58a8431

            SHA512

            1c4b21dd5660bfec8347257bb3da64681b0a97c427790d9ab3484f687dac032bcff0e07876635953697b00cf83e7d37f97c44e0219627fd0533f60ed3024b97e

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_7f45a795-9723-4ae3-b7ea-79ea7f92b87a

            MD5

            a725bb9fafcf91f3c6b7861a2bde6db2

            SHA1

            8bb5b83f3cc37ff1e5ea4f02acae38e72364c114

            SHA256

            51651f27f54c7261887037aa1de4eff0a26c6807906dfc34a15cd5a0b58a8431

            SHA512

            1c4b21dd5660bfec8347257bb3da64681b0a97c427790d9ab3484f687dac032bcff0e07876635953697b00cf83e7d37f97c44e0219627fd0533f60ed3024b97e

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_aacd219d-c7ba-43ff-a67c-9ddc2f632d63

            MD5

            597009ea0430a463753e0f5b1d1a249e

            SHA1

            4e38b8bb65ecbd5c9f0d3d8c47f7caba33de6c62

            SHA256

            3fd2a8217a845c43dbc0dc206c28be81d2687aa9ba62019d905aef10cfaec45d

            SHA512

            5d722fa908e64575b2497c60d142e182011a10c6ed33813b3b4796b3147ece1bc96938518b4c8911a1bac3b7560528ebe3e8e754c11015516d335df5d7c6871d

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_c1b2389f-a16a-40cd-8bbf-335df511c36c

            MD5

            7f79b990cb5ed648f9e583fe35527aa7

            SHA1

            71b177b48c8bd745ef02c2affad79ca222da7c33

            SHA256

            080ec69d3f2abac629a0bdc314f150ad42a9a1b0a031b1d5c7b5b80051c48683

            SHA512

            20926edf7f0b990da4bd8d7ba91bd8bf7b952b75080f687afa7197a91777604688303d38b4a0a7240b558c23f2e0cd927d3590765109f8be0551f5eb050eafda

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_dbb4a1d4-28aa-4475-a352-4829ab8cb1c1

            MD5

            d89968acfbd0cd60b51df04860d99896

            SHA1

            b3c29916ccb81ce98f95bbf3aa8a73de16298b29

            SHA256

            1020cc7c929cd5a4e68ccb40353ca76f427df363f0d95e456eb79db039bdb2b9

            SHA512

            b0e886cce598371b59131fed1535e220c798691bad93ef9474ba440066f5a6bd77a60966604b7a5ff6298b2e200c9dd0c8f9f04aff208b2af423480ead4e8842

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_e9f9468a-8cbd-4472-b808-e8b3772f4134

            MD5

            02ff38ac870de39782aeee04d7b48231

            SHA1

            0390d39fa216c9b0ecdb38238304e518fb2b5095

            SHA256

            fbd66a9baf753db31b8de23f2d51b67f8676687503653103080c45b16f1dc876

            SHA512

            24a1ff76ee42ff7a5ea42843928c4df07b06178f7781cd840e1e086e88735d81506eb67259ff1e6ce5aaa7c5baea03886da265eb7e025ff4dc4c4b5f8cd3e341

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheEntry_fb104523-701b-411a-a152-d8732127aa63

            MD5

            354b8209f647a42e2ce36d8cf326cc92

            SHA1

            98c3117f797df69935f8b09fc9e95accfe3d8346

            SHA256

            feae405d288fdd38438f9d9b54f791f3ce3805f1bb88780da5aca402ad372239

            SHA512

            420be869b58e9a7a2c31f2550ac269df832935692a6431d455a10d9b426781e79d91e30ace2c465633b8a7ff2be1bf49734d8b99a390090dc4b36411d4391ff0

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex

            MD5

            2b055a9f53bf43e6695ec4b0110142b9

            SHA1

            b7c42f2a7298fde33e05b274ed0ba90b2256d8f0

            SHA256

            cc7098f6cf9abf876a3ac58950de2e9d659e8cf1c2d3f9d443ff834bf4c31e75

            SHA512

            2a024038fd2c337c0e0903d971e05bdfa4b327fcb0da12512c3e123b7e1eae48fe779e86d061ff510a3ca6dc945cb3d4c229ec9a1aa2d0770994236c974ed777

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex

            MD5

            97c843cba768b77cefc2f5b065decd7b

            SHA1

            2437be4c9c26e9c331853b58206e2afb0b111ce8

            SHA256

            a8c813e650e803d8625051a99c2929fa06a6985663f4c251aa75489be9cd4845

            SHA512

            015ca99f86e77add93ec1e37eb236b43965d7d86484f34edcf2808c102a895593ac90e4c8ef12685d1fc33b83047ee9e9f545f521892b9b99424dbdd99854ece

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex

            MD5

            97c843cba768b77cefc2f5b065decd7b

            SHA1

            2437be4c9c26e9c331853b58206e2afb0b111ce8

            SHA256

            a8c813e650e803d8625051a99c2929fa06a6985663f4c251aa75489be9cd4845

            SHA512

            015ca99f86e77add93ec1e37eb236b43965d7d86484f34edcf2808c102a895593ac90e4c8ef12685d1fc33b83047ee9e9f545f521892b9b99424dbdd99854ece

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex

            MD5

            db8652222bfcb53f6150978fdec14b6a

            SHA1

            f15595f338f27ce460ef7f84100dd59c94348ec1

            SHA256

            a9295d22a124ca3cd7364007deee75af54ec133887c843cbb82ad530bead6c3e

            SHA512

            e9b01cff86d3d1790c29560a693a97d753e063ad43393558ff8a91df55d3b9d3e7526ee7609bede4fe326ec4eb49fb5a8422d7977232353569d0502ae485fce0

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

            MD5

            970b903b0d98fa3d6890aec2774d0414

            SHA1

            d5757e420af730330c732dfee5c0d70ec299337d

            SHA256

            5744a197fb1f25f0286e9858eae6068a5acf82ce23a3c04a941fbf5bfbea31af

            SHA512

            e9a7cde636acece35c74ac2fbf72295788b026d96492eea5f212a4556c9331b1e102241c2717cd6b11d717d803a3657fcb1be02e707323de3adab392938896bf

          • memory/516-20-0x0000000001EB0000-0x0000000001EB1000-memory.dmp

            Filesize

            4KB

          • memory/516-8-0x0000000000000000-mapping.dmp

          • memory/516-37-0x0000000001E12000-0x0000000001E13000-memory.dmp

            Filesize

            4KB

          • memory/516-16-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/516-22-0x0000000001E10000-0x0000000001E11000-memory.dmp

            Filesize

            4KB

          • memory/516-61-0x0000000005240000-0x0000000005241000-memory.dmp

            Filesize

            4KB

          • memory/676-51-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/676-48-0x00000000004374DE-mapping.dmp

          • memory/776-25-0x0000000000890000-0x0000000000891000-memory.dmp

            Filesize

            4KB

          • memory/776-2-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/776-3-0x0000000000F50000-0x0000000000F51000-memory.dmp

            Filesize

            4KB

          • memory/776-5-0x00000000003D0000-0x00000000003D1000-memory.dmp

            Filesize

            4KB

          • memory/776-6-0x0000000002400000-0x0000000002464000-memory.dmp

            Filesize

            400KB

          • memory/792-10-0x0000000000000000-mapping.dmp

          • memory/792-18-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/792-104-0x0000000006370000-0x0000000006371000-memory.dmp

            Filesize

            4KB

          • memory/792-103-0x0000000006360000-0x0000000006361000-memory.dmp

            Filesize

            4KB

          • memory/792-30-0x00000000047D2000-0x00000000047D3000-memory.dmp

            Filesize

            4KB

          • memory/792-88-0x0000000006230000-0x0000000006231000-memory.dmp

            Filesize

            4KB

          • memory/792-28-0x00000000047D0000-0x00000000047D1000-memory.dmp

            Filesize

            4KB

          • memory/792-67-0x0000000005650000-0x0000000005651000-memory.dmp

            Filesize

            4KB

          • memory/792-72-0x0000000006060000-0x0000000006061000-memory.dmp

            Filesize

            4KB

          • memory/792-73-0x00000000060F0000-0x00000000060F1000-memory.dmp

            Filesize

            4KB

          • memory/792-74-0x000000007EF30000-0x000000007EF31000-memory.dmp

            Filesize

            4KB

          • memory/792-81-0x0000000005690000-0x0000000005691000-memory.dmp

            Filesize

            4KB

          • memory/960-23-0x0000000004810000-0x0000000004811000-memory.dmp

            Filesize

            4KB

          • memory/960-40-0x0000000004812000-0x0000000004813000-memory.dmp

            Filesize

            4KB

          • memory/960-31-0x0000000004850000-0x0000000004851000-memory.dmp

            Filesize

            4KB

          • memory/960-7-0x0000000000000000-mapping.dmp

          • memory/960-9-0x0000000076071000-0x0000000076073000-memory.dmp

            Filesize

            8KB

          • memory/960-17-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/1404-54-0x00000000004374DE-mapping.dmp

          • memory/1804-57-0x0000000002480000-0x0000000002481000-memory.dmp

            Filesize

            4KB

          • memory/1804-12-0x0000000000000000-mapping.dmp

          • memory/1804-39-0x00000000049E2000-0x00000000049E3000-memory.dmp

            Filesize

            4KB

          • memory/1804-19-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/1804-36-0x00000000049E0000-0x00000000049E1000-memory.dmp

            Filesize

            4KB

          • memory/1956-45-0x00000000004374DE-mapping.dmp

          • memory/1956-49-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/1976-29-0x00000000004374DE-mapping.dmp

          • memory/1976-27-0x0000000000400000-0x000000000043C000-memory.dmp

            Filesize

            240KB

          • memory/1976-43-0x0000000000400000-0x000000000043C000-memory.dmp

            Filesize

            240KB

          • memory/1976-35-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/2032-41-0x00000000004374DE-mapping.dmp

          • memory/2032-42-0x0000000073F20000-0x000000007460E000-memory.dmp

            Filesize

            6.9MB

          • memory/2032-56-0x00000000006D0000-0x00000000006D1000-memory.dmp

            Filesize

            4KB