Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/03/2024, 12:22

General

  • Target
    b21c445c35b23805edc7d6eefdf64fc6.exe
  • Size 478KB
  • Sample240304-pj17pabb82
  • SHA256 3a814bb25531eee18b7e064d33960929e2073a2f73a4476ece9512024c313ed3
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Renames multiple (5580) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • ASPack v2.12-2.42 4 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops autorun.inf file 1 TTPs 3 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b21c445c35b23805edc7d6eefdf64fc6.exe
    "C:\Users\Admin\AppData\Local\Temp\b21c445c35b23805edc7d6eefdf64fc6.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops startup file
    • Enumerates connected drives
    • Drops autorun.inf file
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:4908
    • C:\Windows\SysWOW64\HelpMe.exe
      C:\Windows\system32\HelpMe.exe
      2⤵
      • Modifies WinLogon for persistence
      • Drops startup file
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops autorun.inf file
      • Drops file in System32 directory
      PID:2332

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        desktop.ini.exe

        • Path C:\$Recycle.Bin\S-1-5-21-557049126-2506969350-2798870634-1000\desktop.ini.exe
        • Size 479KB
        • SHA256 0b1b545bad7b0e1677f439b491e11a7255ed7bb77026ab18442bb28fc7ea11f8
        • MD5 SHA1 SHA512 SSDEEP

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 d6946de0da7837cd1ee2d8463196fc004e021f81179f301cb59aae2d1b1595ad
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 fffa74ef336af0830bb89a7890de57ddd5ae21db3e62b3c5d6ec8d3cb2a07e44
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 2ba53e9e590926d17516122b911c4feedd36d963583f5f9c2f161bce6696f263
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 e82e19a71c19678c8be2efab03858c2ab7b43440a1cfd7f21487dc7874b428e7
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 71478f1af088390fc28569b4ac6fe02ed016996a0e16e2607bc2eb5dd054fa54
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 ac2bb48d6170108116faca4f216005730709c02da562013e5211ef9aa22c0de5
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 fe0a7f1a0c3aad4187170a7f4b1f9ecb8d5825f5d391ed00d33813e568cff430
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 21fe42b1a7c5d19b841477232b08489e67bfccb301f475e0ed78380b26a81796
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 f518b35a840c58e2ea6ddd0789c97e44d43405e637953f1bab76ea79db9566ff
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 de97bf8806498ca9def48780792975ba4e84b574f933f8d4da45c22f2978c330
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 75513c23b0e266f18d4b8f1f5b45003586dd5bf4c09e4a182bce630def0e836c
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 39502a1360d2a545da607282b0d610d0eedfb18fa2a3e1a6f981b105acc0d966
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 dd014023b5a2c58592be32c2bd08e4560e8b4692c180814de86fb1f0b8ac77db
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 e21f15569773d6f59bbfee34c198c73d32705ff6e99cf51c0ec0da4ce0cd2790
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 6bfffa4f160697b7b56cff9d1413876be10bd6b5020f18932b622deb30b862cd
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 a16a9304927deb0a875c9b5c0a2c958ef42c78f9fbe45f9cca912cbe15ba2f74
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 6847a3c87c5e7ddd74b1c4dac60ee48b7df021533cfd95af67a32040df6bc332
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 0b867a8fc9c7499c68cf643b8942b9128ce4c8f86c2fed946a848e43eef96f44
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 66b1f3779a3a2e1195a11335a9058b8f3d853f1529c17ea659527609b88f30c9
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 6ca9bdac6eaa18b8db13461480069e0f4dbbfd29d6d194c521d3261db2e75f6e
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 c6279fbcd8641bf813e82406f6bab676e7285fedea2ad6eaaa6cf58bdf4ab9c0
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 e1b282f9c4355682a2a1fbc0ff57aaeedcfe337184d969a03c70d7dab0ecdfd0
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 49b4949671ebbfd191641e8b78ecc4a38ea0390b65d3665371e84744a5b905e3
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 c248680587a634f0b1dbfb330528a9a16c42e2bce21de56be594879772a7abd4
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 086459d5efd8e556dc755eef274b79062fc9781a3e3c053d6c49058209101613
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 dfef495cf61a6a8ac0bad020175912a0446f957237bf3cf0593b8fde1a65a865
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 b4298f550a9f4306c4938c4a2a0c0209db454013be133093c56d9d4b10441d40
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 b418ef9882368d1a56efb4b46c65e67de85369d32961669a9b4fce8a8c0ca75b
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 ed9aa17e96c43ad004930dd6bb9980fe1de5bd9be84b0ef36babf75d6fe150f0
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 1fe48c38645e33e19c1755eb9fadb10695b865d537f7e483755e1edc08c5e577
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 28eda7148f1d71123dd09948d9d8042870304ec3c9153e313c52029214a42c46
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 06aa44f394b1e1f710d29905b6605346305aa5127ab2e050d829aa800cfdb651
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 30cf6181fce99e6fb5c612e6d8d1edcda8691ca6e5fe14c49d97929fe64d0a5c
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 d8cb58274ad1093db1ded16f02c89cb71f2925211077d01ef55a264cafa93562
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 a32839325fff030ac6a3da79f5b42ad33b795e267df37287d2ecf09e64634ca1
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 4501b1fa03dba6109b21e16a7232526441cdb5d3580c8dc4987c3e88a0c5ef93
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 a6a56d2a3a6c632d407090a4a2ecab41a480425c09766b72bee61213452a2a38
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 20b2a8b9759d003f4e3d652fdb999dc38489de8bfda4e1e2a76af0fff417a03f
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 1689abab56765b043fb342091b2b38612f61acc6c6e75975556f05cebd36e60b
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1019B
        • SHA256 04ef79090118c4789c6120d1cafe3336212ec22f89069a7d9fa0eb256dd1d10e
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 3ea9c2cb63c3185c57ca8cae3b4f38f273a456f53f114a06536a30fd710cf1d9
        • MD5 SHA1 SHA512

        Soft.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk
        • Size 1KB
        • SHA256 0be822d84277b9430bdf4c53b277d917c26fad0438e4fe20c15087a2e66d6037
        • MD5 SHA1 SHA512

        HelpMe.exe

        • Path C:\Windows\SysWOW64\HelpMe.exe
        • Size 425KB
        • SHA256 d1a3958f16d4f5b7745e538d7891f1412651fa1aeae79509db482fa36d5ab48c
        • MD5 SHA1 SHA512 SSDEEP

        desktop.ini.exe

        • Path F:\$RECYCLE.BIN\S-1-5-21-557049126-2506969350-2798870634-1000\desktop.ini.exe
        • Size 479KB
        • SHA256 bef7abcf684a99425566e14a141e612075e4a7056bafae32e7cd2a1dc714b782
        • MD5 SHA1 SHA512 SSDEEP

        AUTORUN.INF

        • Path F:\AUTORUN.INF
        • Size 145B
        • SHA256 cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae
        • MD5 SHA1 SHA512

        AutoRun.exe

        • Path F:\AutoRun.exe
        • Size 478KB
        • SHA256 3a814bb25531eee18b7e064d33960929e2073a2f73a4476ece9512024c313ed3
        • MD5 SHA1 SHA512 SSDEEP

        memory/2332-2478-0x0000000000740000-0x0000000000741000-memory.dmp

        memory/2332-5-0x0000000000740000-0x0000000000741000-memory.dmp

        memory/4908-2136-0x0000000002320000-0x0000000002321000-memory.dmp

        memory/4908-0-0x0000000002320000-0x0000000002321000-memory.dmp