Analysis

  • max time kernel
    117s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2024 09:53

Errors

Reason
Machine shutdown

General

  • Target

    5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6.exe

  • Size

    3.7MB

  • MD5

    cd765738ca380479232b3742bec4681a

  • SHA1

    72183452d01eabefa4a1dc4e4702df04aca6da4e

  • SHA256

    5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6

  • SHA512

    047266f5d2f30661857c501c705a18128082551498351eee28600bfb051e276535e00abfa0dd30acbcdb01e9238958f06ca934abb094ee03666cae51475ed6f5

  • SSDEEP

    49152:sBe/wR+kPCndafDZ7MTpxKQ4vWcucxZIp6/Y6HhxVetUw5WxGea2rkoVAAVsK5Iw:/namVxrcxys/XhxsuwEUeFzyRM

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CODE

C2

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

Mutex

02351e291-5d041-4fa37-932c7-869aeiQec514992

Attributes
  • encryption_key

    3145298725BA5E0DD56E87FFE3F8898EA81E6EDA

  • install_name

    workbook.exe

  • log_directory

    Logs

  • reconnect_delay

    6000

  • startup_key

    workbook

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar 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.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 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 13 IoCs

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

  • Modifies data under HKEY_USERS 15 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6.exe
    "C:\Users\Admin\AppData\Local\Temp\5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2360
    • 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\5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4104
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\IoOrGePEOIrHFn.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3128
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IoOrGePEOIrHFn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE72.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3892
    • C:\Users\Admin\AppData\Local\Temp\5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6.exe
      "C:\Users\Admin\AppData\Local\Temp\5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2920
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "workbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:932
      • C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3340
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4812
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\IoOrGePEOIrHFn.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1020
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IoOrGePEOIrHFn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5A12.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2788
        • C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
          4⤵
          • Executes dropped EXE
          PID:4824
        • C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4296
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "workbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe" /rl HIGHEST /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:3168
          • C:\Windows\SysWOW64\shutdown.exe
            "C:\Windows\System32\shutdown.exe" /s /t 0
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:3240
  • C:\Windows\system32\LogonUI.exe
    "LogonUI.exe" /flags:0x4 /state0:0xa3945055 /state1:0x41c64e6d
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:4932

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6.exe.log

    Filesize

    1KB

    MD5

    8ec831f3e3a3f77e4a7b9cd32b48384c

    SHA1

    d83f09fd87c5bd86e045873c231c14836e76a05c

    SHA256

    7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

    SHA512

    26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

    Filesize

    2KB

    MD5

    968cb9309758126772781b83adb8a28f

    SHA1

    8da30e71accf186b2ba11da1797cf67f8f78b47c

    SHA256

    92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

    SHA512

    4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

    Filesize

    18KB

    MD5

    bb01861441fda033890d5e7b054e689d

    SHA1

    fc40b7162fd5505e51db296b19b5e87f4d1de77c

    SHA256

    eb0b9f7dc45c04f8faa4bb0006e799172dadecde76b897868f894b9a60319ad8

    SHA512

    8d0c1adda2e0d69bff69cf56c0dcc4a47570e2340621b7a52c17796046c21310966b32a3720cbbc999926eb5bedef783d7d704d8964f05b1e794f04f91a57f86

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

    Filesize

    18KB

    MD5

    62cf798aa589186273ef66d986dafe8f

    SHA1

    5e7bbcf5d9c67c6f8f58dc26534b36b8584f11c9

    SHA256

    3f03150d62bc7c7b92aad6bc31960b233d8cd46081b5b5fa4030e595ba12b81f

    SHA512

    21ed68eb505e2a0e7875646d542979a5388d4eaf036e57321d193fcc6fb7fde72088c353c1dfc0430ea77819bcc1bcaa27e6417743401cb187adff5e24e0bb88

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_utuamb4c.o5f.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpE72.tmp

    Filesize

    1KB

    MD5

    d16f5892eeffa77e64ca4cbf741e7140

    SHA1

    9f22a14835c02709a9b6490c0368535023168f81

    SHA256

    6c8b867a986cc6a7e28c9ed9a8df8a457f92cb5f5d874f626c3e7afde9834d4c

    SHA512

    97295b3c17cd9458f8f5dd1f94c1436e49aed23af86997c7d538392947eae64e19c6841ac25d3c99c3fe8e4da09d467a5b30c40f58be9aee0182902c1c828edf

  • C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe

    Filesize

    3.7MB

    MD5

    cd765738ca380479232b3742bec4681a

    SHA1

    72183452d01eabefa4a1dc4e4702df04aca6da4e

    SHA256

    5182c93d80ab847541599124d388613c23bfb193b7879f5395b421bba5c568f6

    SHA512

    047266f5d2f30661857c501c705a18128082551498351eee28600bfb051e276535e00abfa0dd30acbcdb01e9238958f06ca934abb094ee03666cae51475ed6f5

  • memory/1020-133-0x00000000714B0000-0x00000000714FC000-memory.dmp

    Filesize

    304KB

  • memory/1020-148-0x0000000007C70000-0x0000000007C84000-memory.dmp

    Filesize

    80KB

  • memory/2360-5-0x0000000004F80000-0x0000000004F8A000-memory.dmp

    Filesize

    40KB

  • memory/2360-10-0x0000000006FA0000-0x000000000703C000-memory.dmp

    Filesize

    624KB

  • memory/2360-9-0x00000000066D0000-0x0000000006A38000-memory.dmp

    Filesize

    3.4MB

  • memory/2360-8-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/2360-7-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

    Filesize

    4KB

  • memory/2360-6-0x0000000007D60000-0x0000000007D78000-memory.dmp

    Filesize

    96KB

  • memory/2360-0-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

    Filesize

    4KB

  • memory/2360-4-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/2360-3-0x0000000007A00000-0x0000000007A92000-memory.dmp

    Filesize

    584KB

  • memory/2360-50-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/2360-2-0x0000000007ED0000-0x0000000008474000-memory.dmp

    Filesize

    5.6MB

  • memory/2360-1-0x00000000007A0000-0x0000000000B4C000-memory.dmp

    Filesize

    3.7MB

  • memory/2920-48-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/3128-88-0x0000000007720000-0x0000000007728000-memory.dmp

    Filesize

    32KB

  • memory/3128-78-0x0000000007470000-0x000000000747A000-memory.dmp

    Filesize

    40KB

  • memory/3128-24-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/3128-95-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/3128-19-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/3128-87-0x0000000007740000-0x000000000775A000-memory.dmp

    Filesize

    104KB

  • memory/3128-86-0x0000000007640000-0x0000000007654000-memory.dmp

    Filesize

    80KB

  • memory/3128-85-0x0000000007630000-0x000000000763E000-memory.dmp

    Filesize

    56KB

  • memory/3128-63-0x00000000702A0000-0x00000000702EC000-memory.dmp

    Filesize

    304KB

  • memory/3128-84-0x0000000007600000-0x0000000007611000-memory.dmp

    Filesize

    68KB

  • memory/3128-45-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/3128-73-0x0000000006690000-0x00000000066AE000-memory.dmp

    Filesize

    120KB

  • memory/3128-83-0x0000000007680000-0x0000000007716000-memory.dmp

    Filesize

    600KB

  • memory/3128-77-0x0000000007400000-0x000000000741A000-memory.dmp

    Filesize

    104KB

  • memory/3128-76-0x0000000007A50000-0x00000000080CA000-memory.dmp

    Filesize

    6.5MB

  • memory/4104-53-0x00000000702A0000-0x00000000702EC000-memory.dmp

    Filesize

    304KB

  • memory/4104-31-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/4104-52-0x0000000006D30000-0x0000000006D62000-memory.dmp

    Filesize

    200KB

  • memory/4104-74-0x0000000006F70000-0x0000000007013000-memory.dmp

    Filesize

    652KB

  • memory/4104-21-0x0000000005600000-0x0000000005666000-memory.dmp

    Filesize

    408KB

  • memory/4104-25-0x0000000005760000-0x0000000005AB4000-memory.dmp

    Filesize

    3.3MB

  • memory/4104-46-0x0000000005D80000-0x0000000005D9E000-memory.dmp

    Filesize

    120KB

  • memory/4104-17-0x0000000004FD0000-0x00000000055F8000-memory.dmp

    Filesize

    6.2MB

  • memory/4104-20-0x0000000004ED0000-0x0000000004EF2000-memory.dmp

    Filesize

    136KB

  • memory/4104-47-0x0000000006140000-0x000000000618C000-memory.dmp

    Filesize

    304KB

  • memory/4104-94-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/4104-18-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/4104-15-0x0000000004840000-0x0000000004876000-memory.dmp

    Filesize

    216KB

  • memory/4104-16-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/4104-22-0x0000000005670000-0x00000000056D6000-memory.dmp

    Filesize

    408KB

  • memory/4296-147-0x0000000006B80000-0x0000000006C32000-memory.dmp

    Filesize

    712KB

  • memory/4296-144-0x0000000006D70000-0x0000000007388000-memory.dmp

    Filesize

    6.1MB

  • memory/4296-145-0x0000000006910000-0x0000000006960000-memory.dmp

    Filesize

    320KB

  • memory/4296-152-0x0000000006B50000-0x0000000006B62000-memory.dmp

    Filesize

    72KB

  • memory/4296-153-0x0000000007F50000-0x0000000007F8C000-memory.dmp

    Filesize

    240KB

  • memory/4812-139-0x0000000007130000-0x00000000071D3000-memory.dmp

    Filesize

    652KB

  • memory/4812-123-0x00000000714B0000-0x00000000714FC000-memory.dmp

    Filesize

    304KB

  • memory/4812-146-0x00000000073F0000-0x0000000007401000-memory.dmp

    Filesize

    68KB

  • memory/4812-122-0x0000000006420000-0x000000000646C000-memory.dmp

    Filesize

    304KB

  • memory/4812-103-0x0000000005830000-0x0000000005B84000-memory.dmp

    Filesize

    3.3MB