Analysis

  • max time kernel
    13s
  • max time network
    18s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    29-07-2024 11:33

General

  • Target

    CatrinePerm/CatrinePerm.exe

  • Size

    811KB

  • MD5

    5aabc1aaec4fe6297da47c8d327ddd29

  • SHA1

    ddfb19d827747f4ed4e59d4f2975f7017568e974

  • SHA256

    45df56d3bd73f3dd6ee05a8d77afd52d61012d1742cae6e42196f9f6f236f6d8

  • SHA512

    290b5f9e373b39f41b235ea09d90d026db38e0e63b7f660ff020d9c99819d7baa051fe5fae8221fc8eb5ac635a65de47ba127da2453e7d3a25f1ca337afb9fd6

  • SSDEEP

    12288:bwr+M1vyQiO+e7tmMjg4yDY7YjqhRNecqnfpQzt562ByZG3Xw5FP/umZtD1ryHsw:MzDE4Hzn2pstQEyZGw5F+SD1OHo6T

Malware Config

Extracted

Family

xworm

C2

78.69.106.17:8000

Attributes
  • Install_directory

    %AppData%

  • install_file

    Update.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • 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.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 16 IoCs
  • Adds Run key to start application 2 TTPs 1 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.

  • Detects Pyinstaller 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 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 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\CatrinePerm\CatrinePerm.exe
    "C:\Users\Admin\AppData\Local\Temp\CatrinePerm\CatrinePerm.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2408
    • C:\Users\Admin\AppData\Roaming\Win (3).exe
      "C:\Users\Admin\AppData\Roaming\Win (3).exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:852
      • C:\Users\Admin\AppData\Local\Temp\WinRAR.exe
        "C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2312
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\WinRAR.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2148
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'WinRAR.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:304
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Update.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1036
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1624
        • C:\Windows\System32\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:1292
      • C:\Users\Admin\AppData\Local\Temp\pythonw.exe
        "C:\Users\Admin\AppData\Local\Temp\pythonw.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1448
        • C:\Users\Admin\AppData\Local\Temp\pythonw.exe
          "C:\Users\Admin\AppData\Local\Temp\pythonw.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1944
      • C:\Users\Admin\AppData\Local\Temp\RtkBtAudioServ.exe
        "C:\Users\Admin\AppData\Local\Temp\RtkBtAudioServ.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2444
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2444 -s 592
          4⤵
          • Loads dropped DLL
          • Program crash
          PID:2960
    • C:\Users\Admin\AppData\Roaming\CatrinePerm.exe
      "C:\Users\Admin\AppData\Roaming\CatrinePerm.exe"
      2⤵
      • Executes dropped EXE
      PID:2932

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\RtkBtAudioServ.exe

    Filesize

    11KB

    MD5

    9dfb70a009d9a1696a1a55d17b0321a5

    SHA1

    0129fcc88ba5c5bb58e8cf0e8860b3b53dbec7a9

    SHA256

    4eba44c61669a2d7c77b7997846b0d779989d4fff31120caeca595887576c19b

    SHA512

    0f18f936de567c884d284cd00d9c5953c89865776ef3adc8e7c4de801dda4548c9d1998f222011ca66d567d64c2ad6bfd10050987ec216f9c14844edfb5c6d73

  • C:\Users\Admin\AppData\Local\Temp\WinRAR.exe

    Filesize

    179KB

    MD5

    3eda75ddf0da931a8b305573d7508e8c

    SHA1

    d19618faac5e98152797aa94860725827dae4359

    SHA256

    c66e4c3be01e7830f7e564ce3139c774eed746c7db619b767e4f1f6e83c52cb9

    SHA512

    32d05e9c0fe66fee74d67ec20ea33b9332e5a077ef6e8ae26956e00fc839cdd9a840fcd944e33dd8655395588ab74e9768e1ea6210c234a0d60d14e560d544d0

  • C:\Users\Admin\AppData\Local\Temp\_MEI14482\api-ms-win-core-processthreads-l1-1-1.dll

    Filesize

    21KB

    MD5

    4380d56a3b83ca19ea269747c9b8302b

    SHA1

    0c4427f6f0f367d180d37fc10ecbe6534ef6469c

    SHA256

    a79c7f86462d8ab8a7b73a3f9e469514f57f9fe456326be3727352b092b6b14a

    SHA512

    1c29c335c55f5f896526c8ee0f7160211fd457c1f1b98915bcc141112f8a730e1a92391ab96688cbb7287e81e6814cc86e3b057e0a6129cbb02892108bfafaf4

  • C:\Users\Admin\AppData\Local\Temp\_MEI14482\api-ms-win-core-timezone-l1-1-0.dll

    Filesize

    21KB

    MD5

    2554060f26e548a089cab427990aacdf

    SHA1

    8cc7a44a16d6b0a6b7ed444e68990ff296d712fe

    SHA256

    5ab003e899270b04abc7f67be953eaccf980d5bbe80904c47f9aaf5d401bb044

    SHA512

    fd4d5a7fe4da77b0222b040dc38e53f48f7a3379f69e2199639b9f330b2e55939d89ce8361d2135182b607ad75e58ee8e34b90225143927b15dcc116b994c506

  • C:\Users\Admin\AppData\Local\Temp\_MEI14482\python311.dll

    Filesize

    5.5MB

    MD5

    86e0ad6ba8a9052d1729db2c015daf1c

    SHA1

    48112072903fff2ec5726cca19cc09e42d6384c7

    SHA256

    5ecda62f6fd2822355c560412f6d90be46a7f763f0ffeec9854177904632ac2d

    SHA512

    5d6e32f9ff90a9a584183dad1583aea2327b4aea32184b0ebbec3df41b0b833e6bb3cd40822dd64d1033125f52255812b17e4fa0add38fcda6bab1724dfaa2eb

  • C:\Users\Admin\AppData\Local\Temp\_MEI14482\ucrtbase.dll

    Filesize

    992KB

    MD5

    0e0bac3d1dcc1833eae4e3e4cf83c4ef

    SHA1

    4189f4459c54e69c6d3155a82524bda7549a75a6

    SHA256

    8a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae

    SHA512

    a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd

  • C:\Users\Admin\AppData\Local\Temp\pythonw.exe

    Filesize

    10.8MB

    MD5

    4f5026ca550536ba2782fe3221ae6787

    SHA1

    d91e8dd609e2bde9857a0ce4aa2e049636cb34a3

    SHA256

    5a03d4bba3d6916cfc76bad8afb9dc22094b60a8d0aab8a2330d1b1d692fe6ee

    SHA512

    4d63c136ed41b68b56f80920005ad03a99708c44b2b4a776f20366011059126a54a5ff446f6967f49f7e20a918d4c50e062c3cae2f5f8f34f30cdb8ec508914a

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

    Filesize

    139KB

    MD5

    10605ec186aacb6a4b3dde419cb0b5e5

    SHA1

    9c41040a4c238dec28c4f47bfb0a28a3cd4bf19d

    SHA256

    ca5b3ebffc2080fec7d44655069190b892e51e4bc4401c31f64a5a70d46f1ead

    SHA512

    1d48bbc5c965f098300ce5404269ea5b1694887531b9aa1e953755f631325946e4914405ae3cabfe13d222ddfde4b0368d446b9aad3956f345d6b142d6579a9d

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

    Filesize

    7KB

    MD5

    3136de678293e70ea143559b055b0f0a

    SHA1

    20cfc770468102b4a00cb833324764b58fd4ee99

    SHA256

    cfd82572ea10eca11c465633d8168de81049f10ee272bbd987fb60125a56d9e8

    SHA512

    da56729a4996bd9b05d592658a2ec999e48a5455b653b3ff64ca2c8a9c8d29262f4e93041c10952be3d567f768a7d0c846fc16e111892bd11edceaeabcee3498

  • C:\Users\Admin\AppData\Roaming\Win (3).exe

    Filesize

    11.1MB

    MD5

    5b38b99b1d06989fcb361234e48f5087

    SHA1

    13ebfd2fba93556f68ab5400a9305ca46d3cef97

    SHA256

    15e3f8123a8183dcf94c8e5be709d81ff5f1ae4e27ed4c7e5346c0074667a935

    SHA512

    9daddeb5cd96d3c56c4b1b67985e274a8addef80d15b5ebab040a700cc3f47e541f86839ec0497186a294bc198ede3323cd93f028628e4cb68b5a3b2ef688086

  • \Users\Admin\AppData\Local\Temp\_MEI14482\api-ms-win-core-file-l1-2-0.dll

    Filesize

    21KB

    MD5

    bcb8b9f6606d4094270b6d9b2ed92139

    SHA1

    bd55e985db649eadcb444857beed397362a2ba7b

    SHA256

    fa18d63a117153e2ace5400ed89b0806e96f0627d9db935906be9294a3038118

    SHA512

    869b2b38fd528b033b3ec17a4144d818e42242b83d7be48e2e6da6992111758b302f48f52e0dd76becb526a90a2b040ce143c6d4f0e009a513017f06b9a8f2b9

  • \Users\Admin\AppData\Local\Temp\_MEI14482\api-ms-win-core-file-l2-1-0.dll

    Filesize

    18KB

    MD5

    bfffa7117fd9b1622c66d949bac3f1d7

    SHA1

    402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

    SHA256

    1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

    SHA512

    b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

  • \Users\Admin\AppData\Local\Temp\_MEI14482\api-ms-win-core-localization-l1-2-0.dll

    Filesize

    21KB

    MD5

    20ddf543a1abe7aee845de1ec1d3aa8e

    SHA1

    0eaf5de57369e1db7f275a2fffd2d2c9e5af65bf

    SHA256

    d045a72c3e4d21165e9372f76b44ff116446c1e0c221d9cea3ab0a1134a310e8

    SHA512

    96dd48df315a7eea280ca3da0965a937a649ee77a82a1049e3d09b234439f7d927d7fb749073d7af1b23dadb643978b70dcdadc6c503fe850b512b0c9c1c78dd

  • memory/304-171-0x0000000002050000-0x0000000002058000-memory.dmp

    Filesize

    32KB

  • memory/304-170-0x000000001B590000-0x000000001B872000-memory.dmp

    Filesize

    2.9MB

  • memory/852-98-0x000007FEF56E0000-0x000007FEF60CC000-memory.dmp

    Filesize

    9.9MB

  • memory/852-12-0x00000000009E0000-0x00000000014F8000-memory.dmp

    Filesize

    11.1MB

  • memory/1036-177-0x000000001B690000-0x000000001B972000-memory.dmp

    Filesize

    2.9MB

  • memory/2148-164-0x0000000001E70000-0x0000000001E78000-memory.dmp

    Filesize

    32KB

  • memory/2148-163-0x000000001B710000-0x000000001B9F2000-memory.dmp

    Filesize

    2.9MB

  • memory/2312-18-0x0000000000970000-0x00000000009A2000-memory.dmp

    Filesize

    200KB

  • memory/2408-1-0x0000000001100000-0x0000000001C3E000-memory.dmp

    Filesize

    11.2MB

  • memory/2408-0-0x000007FEF56E3000-0x000007FEF56E4000-memory.dmp

    Filesize

    4KB

  • memory/2444-119-0x0000000000B20000-0x0000000000B2A000-memory.dmp

    Filesize

    40KB

  • memory/2444-151-0x0000000000350000-0x000000000035A000-memory.dmp

    Filesize

    40KB

  • memory/2444-147-0x0000000000320000-0x000000000033A000-memory.dmp

    Filesize

    104KB