Resubmissions

01-10-2024 05:13

241001-fwv2rsscqm 10

01-10-2024 05:10

241001-ft4acswekb 8

Analysis

  • max time kernel
    134s
  • max time network
    145s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-ja
  • resource tags

    arch:x64arch:x86image:win10-20240404-jalocale:ja-jpos:windows10-1703-x64systemwindows
  • submitted
    01-10-2024 05:13

General

  • Target

    お見積り依頼.exe

  • Size

    625KB

  • MD5

    a0ecf580ff9dfd9e2a7fa0c3d65f7fd6

  • SHA1

    bbe051177c884c85675df9747d86efa1db0f77a4

  • SHA256

    c46f4ce81d7501f1beca7fb5c694a7e2883ba4e29c498772c448232f7473aafe

  • SHA512

    ef030e4ea6807ec2276e32772a517bca9f88a4891e291d3baf4a5c7dae1739604df173198eccb8583344c6f4d918b7df2f6c298f0be8b5bae4c123e7fdad34fa

  • SSDEEP

    12288:oJOkHljdod9R5CHTCIM0Tr/koAyUoQepfHsz:g69R5ObpTr/kAPjO

Malware Config

Signatures

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Snake Keylogger payload 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe
    "C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4768
    • 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\お見積り依頼.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1672
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4732
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EZIgSdDLNPemJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA49C.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:5012
    • C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe
      "C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2484
  • C:\Windows\System32\IME\SHARED\imebroker.exe
    C:\Windows\System32\IME\SHARED\imebroker.exe -Embedding
    1⤵
      PID:4368
    • C:\Windows\system32\mmc.exe
      "C:\Windows\system32\mmc.exe" "C:\Windows\system32\taskschd.msc" /s
      1⤵
      • Drops file in System32 directory
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2840
    • C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe
      C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5008
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4172
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
        2⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:1832
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EZIgSdDLNPemJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8DC4.tmp"
        2⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:5096
      • C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe
        "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
        2⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • outlook_office_path
        • outlook_win_path
        PID:3364

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      Filesize

      2KB

      MD5

      1c19c16e21c97ed42d5beabc93391fc5

      SHA1

      8ad83f8e0b3acf8dfbbf87931e41f0d664c4df68

      SHA256

      1bcd97396c83babfe6c5068ba590d7a3f8b70e72955a9d1e4070648e404cbf05

      SHA512

      7d18776d8f649b3d29c182ff03efc6cea8b527542ee55304980f24577aae8b64e37044407776e220984346c3998ace5f8853afa58c8b38407482a728e9495e0c

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      498fc7a26544fd8981fdbffaa20faafd

      SHA1

      c0fe4fc53e205ab89182ccc214d77e77de99249b

      SHA256

      f448d3242c5ea8b1d5096707b776b7936af90a0543b84ea0fffeee36d2b17852

      SHA512

      8fb03afb5278d3e5d6b3c8f97a48257aacbb0f0bf1744bae370b4065b7b480bed349a1945de220383fc862840be6f3ab9572953dacd4a9d6c0c4c0e819938e5e

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      ff47af182aae72d166cf801fdc5994f3

      SHA1

      0fd1b4059fe0c7526f7b0fb2dbf9adab8d94760c

      SHA256

      900cc86b324aa99f6a2f4058ee326d5dbdb16403f35ec8b473b993e9756ff3b5

      SHA512

      024f267f71c949f50d1ebd252031d80d0ce93fedcb68a0e56f3c84e6c7de1162ef7753a30d10d529b5b7d0e8ac2b5e499c66693fa7d009b5e954267aede0fa68

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_krfvhqxr.4ie.ps1

      Filesize

      1B

      MD5

      c4ca4238a0b923820dcc509a6f75849b

      SHA1

      356a192b7913b04c54574d18c28d46e6395428ab

      SHA256

      6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

      SHA512

      4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

    • C:\Users\Admin\AppData\Local\Temp\tmpA49C.tmp

      Filesize

      1KB

      MD5

      9eb0a3d412821ee7961ff7f2e641d00d

      SHA1

      f6773c8a50f6647057e40f7d190c074163f578ec

      SHA256

      67942c69ba5ea401ab1c57589be0a8f420d2c0e9e8031c0fc7505518352e6737

      SHA512

      7bae2862e850078286b969df1245cd644fbef80bb7218721755f121ed6c1795f5daad8e8889c5bb016d64fba4e8b6c98e475d8ac29a760d6048c6923a38d2a95

    • C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe

      Filesize

      625KB

      MD5

      a0ecf580ff9dfd9e2a7fa0c3d65f7fd6

      SHA1

      bbe051177c884c85675df9747d86efa1db0f77a4

      SHA256

      c46f4ce81d7501f1beca7fb5c694a7e2883ba4e29c498772c448232f7473aafe

      SHA512

      ef030e4ea6807ec2276e32772a517bca9f88a4891e291d3baf4a5c7dae1739604df173198eccb8583344c6f4d918b7df2f6c298f0be8b5bae4c123e7fdad34fa

    • memory/1672-19-0x0000000006CE0000-0x0000000007308000-memory.dmp

      Filesize

      6.2MB

    • memory/1672-82-0x0000000008F20000-0x0000000008FC5000-memory.dmp

      Filesize

      660KB

    • memory/1672-26-0x0000000006AB0000-0x0000000006AD2000-memory.dmp

      Filesize

      136KB

    • memory/1672-510-0x00000000732A0000-0x000000007398E000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-478-0x0000000009280000-0x0000000009288000-memory.dmp

      Filesize

      32KB

    • memory/1672-83-0x0000000009290000-0x00000000092E0000-memory.dmp

      Filesize

      320KB

    • memory/1672-18-0x00000000065B0000-0x00000000065E6000-memory.dmp

      Filesize

      216KB

    • memory/1672-71-0x000000006FF70000-0x000000006FFBB000-memory.dmp

      Filesize

      300KB

    • memory/1672-20-0x00000000732A0000-0x000000007398E000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-21-0x00000000732A0000-0x000000007398E000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-22-0x00000000732A0000-0x000000007398E000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-70-0x0000000008E40000-0x0000000008E73000-memory.dmp

      Filesize

      204KB

    • memory/1672-28-0x00000000074E0000-0x0000000007546000-memory.dmp

      Filesize

      408KB

    • memory/1672-73-0x0000000008E20000-0x0000000008E3E000-memory.dmp

      Filesize

      120KB

    • memory/1672-27-0x0000000007380000-0x00000000073E6000-memory.dmp

      Filesize

      408KB

    • memory/1832-728-0x000000006FD90000-0x000000006FDDB000-memory.dmp

      Filesize

      300KB

    • memory/2484-512-0x00000000069C0000-0x0000000006B82000-memory.dmp

      Filesize

      1.8MB

    • memory/2484-511-0x0000000006600000-0x0000000006614000-memory.dmp

      Filesize

      80KB

    • memory/2484-32-0x0000000000400000-0x0000000000426000-memory.dmp

      Filesize

      152KB

    • memory/2840-561-0x000000001D0A0000-0x000000001D0C2000-memory.dmp

      Filesize

      136KB

    • memory/2840-556-0x000000001D250000-0x000000001D3F6000-memory.dmp

      Filesize

      1.6MB

    • memory/2840-543-0x0000000003490000-0x000000000349E000-memory.dmp

      Filesize

      56KB

    • memory/2840-528-0x0000000003620000-0x000000000372E000-memory.dmp

      Filesize

      1.1MB

    • memory/4172-723-0x0000000009130000-0x00000000091D5000-memory.dmp

      Filesize

      660KB

    • memory/4172-718-0x000000006FD90000-0x000000006FDDB000-memory.dmp

      Filesize

      300KB

    • memory/4172-689-0x0000000007C50000-0x0000000007C9B000-memory.dmp

      Filesize

      300KB

    • memory/4172-686-0x00000000075E0000-0x0000000007930000-memory.dmp

      Filesize

      3.3MB

    • memory/4732-30-0x0000000008060000-0x00000000083B0000-memory.dmp

      Filesize

      3.3MB

    • memory/4732-25-0x00000000074B0000-0x0000000007542000-memory.dmp

      Filesize

      584KB

    • memory/4732-31-0x00000000076B0000-0x00000000076C0000-memory.dmp

      Filesize

      64KB

    • memory/4732-84-0x0000000009D50000-0x0000000009DE4000-memory.dmp

      Filesize

      592KB

    • memory/4732-469-0x0000000009CB0000-0x0000000009CCA000-memory.dmp

      Filesize

      104KB

    • memory/4732-36-0x0000000008650000-0x000000000869B000-memory.dmp

      Filesize

      300KB

    • memory/4732-35-0x00000000083D0000-0x00000000083EC000-memory.dmp

      Filesize

      112KB

    • memory/4732-37-0x0000000008960000-0x00000000089D6000-memory.dmp

      Filesize

      472KB

    • memory/4732-72-0x000000006FF70000-0x000000006FFBB000-memory.dmp

      Filesize

      300KB

    • memory/4768-4-0x00000000732A0000-0x000000007398E000-memory.dmp

      Filesize

      6.9MB

    • memory/4768-7-0x0000000005270000-0x000000000528E000-memory.dmp

      Filesize

      120KB

    • memory/4768-6-0x00000000079F0000-0x0000000007AFE000-memory.dmp

      Filesize

      1.1MB

    • memory/4768-9-0x00000000732A0000-0x000000007398E000-memory.dmp

      Filesize

      6.9MB

    • memory/4768-5-0x0000000004EC0000-0x0000000004ECA000-memory.dmp

      Filesize

      40KB

    • memory/4768-3-0x0000000004ED0000-0x0000000004F62000-memory.dmp

      Filesize

      584KB

    • memory/4768-2-0x0000000005330000-0x000000000582E000-memory.dmp

      Filesize

      5.0MB

    • memory/4768-0-0x00000000732AE000-0x00000000732AF000-memory.dmp

      Filesize

      4KB

    • memory/4768-10-0x0000000000F80000-0x0000000000FEA000-memory.dmp

      Filesize

      424KB

    • memory/4768-34-0x00000000732A0000-0x000000007398E000-memory.dmp

      Filesize

      6.9MB

    • memory/4768-11-0x000000000D4B0000-0x000000000D54C000-memory.dmp

      Filesize

      624KB

    • memory/4768-8-0x00000000732AE000-0x00000000732AF000-memory.dmp

      Filesize

      4KB

    • memory/4768-1-0x00000000005B0000-0x0000000000652000-memory.dmp

      Filesize

      648KB