Analysis

  • max time kernel
    97s
  • max time network
    97s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-12-2024 09:18

General

  • Target

    88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe

  • Size

    3.0MB

  • MD5

    1335a17d311b929988693fb526dc4717

  • SHA1

    062830cb07ce430fe049627e001ef23fba8ba351

  • SHA256

    88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22

  • SHA512

    4a4496ed95c7ff13e8735646a6b8c478742a2f152a3733122fcbac54c0cd7c04571acae789c2ac67dc07d542663290c9e32b3335827e122470d8b887477d7bab

  • SSDEEP

    49152:NguQhMOPX5M+RXNM5428gYbM8gkw0Q4qAew+0Fr95s9e54OyRGEK2+qc2LBhW:6/hMOP2a9MLiVed0Zqe54OCGL2NLPW

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1118163594568286339/M-x5dkJ7qP3mQPZTzttw8LKBX9G63bPw9edrYMRuBg3sffUGWg-W4EW9HaBcdak0-wis

Signatures

  • Detect Umbral payload 3 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Umbral family
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 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.

  • Drops file in Drivers directory 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Reads user/profile data of web browsers 3 TTPs

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

  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe
    "C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Drops file in Drivers directory
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:64
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2676
    • C:\Windows\SysWOW64\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Views/modifies file attributes
      PID:2060
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4756
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2476
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3676
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4324
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:5104
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4316
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3640
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2992
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic" path win32_VideoController get name
      2⤵
      • System Location Discovery: System Language Discovery
      • Detects videocard installed
      PID:2764
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe" && pause
      2⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:4060
      • C:\Windows\SysWOW64\PING.EXE
        ping localhost
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:5044

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

    3d086a433708053f9bf9523e1d87a4e8

    SHA1

    b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

    SHA256

    6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

    SHA512

    931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

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

    Filesize

    14KB

    MD5

    eda94796a21457205721fec579c26d88

    SHA1

    4cf7a05bbfb99d4d8b77a813c2fb688967e605b7

    SHA256

    8d43f00e57d259458d095b499a6c3390c3a96e46b7feb30dd00a1a66731d652f

    SHA512

    24fdeba1f596422daae28a306261d3b54edfe4b2dd649897f6d404aad60bcd8aca38b00b03bab3b6bcedc5806a60b8c88c33fbbe5c5e6ae5966c55df7fe37f78

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

    Filesize

    18KB

    MD5

    9067ec9418bdd41724e0bdf6340a3426

    SHA1

    57e325daae093a546768901f85a4ab54499233f7

    SHA256

    bf7c78b48307f7a94970b5f2a4cde9ae9acc34466906c07c38ae0dde5ae988bf

    SHA512

    52597ce066e6300da340f71d9ab1848c06c52aa99f0ac998db8caa92edbe6bc792081f76cb741dded80fc2b88fa45eed9c70ba3539c270fdf150a2bf8ff9ffae

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

    Filesize

    17KB

    MD5

    fa294bec264dfe44224f6b951b287519

    SHA1

    4785473f0ee12ad227aa59f0b85138cdd90bd980

    SHA256

    d30e463801637a62fedc18ad87d7f3612b833bfbfd328b0e30cb41a78ef1d83f

    SHA512

    46517a8cf98b080abc870aeb86a933fb70b7204ad18407d40891cdceceda793ffebf64237fcd4f51ede69957faaa1c7de40b39b5c6067416325dbc2ac05969e7

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

    Filesize

    18KB

    MD5

    643262d7a9c523d6f824b875c3cb8c5b

    SHA1

    51e73d10f8a02d7db96e2d31b83149669d7d4b5e

    SHA256

    bc21a1bdcc7e36552c337ca91acfdfd003f8f63f0e3c11e425834272eb6d6640

    SHA512

    18eb2d3b4f4e0cc1b05f10f1c49c2ecdbe7df605dce2345f82a378fac2f37a674e4797bb3cdcda9473a60b8f6c8d2cbf335291730ab9e494ce38f372f15b46f7

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bmdg0vw4.v0r.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/64-125-0x00000000077B0000-0x00000000077BA000-memory.dmp

    Filesize

    40KB

  • memory/64-4-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-7-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-6-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-12-0x0000000000710000-0x0000000000F54000-memory.dmp

    Filesize

    8.3MB

  • memory/64-13-0x0000000000710000-0x0000000000F54000-memory.dmp

    Filesize

    8.3MB

  • memory/64-14-0x0000000005B60000-0x0000000005BF2000-memory.dmp

    Filesize

    584KB

  • memory/64-15-0x00000000061B0000-0x0000000006754000-memory.dmp

    Filesize

    5.6MB

  • memory/64-151-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-150-0x0000000000710000-0x0000000000F54000-memory.dmp

    Filesize

    8.3MB

  • memory/64-0-0x0000000000710000-0x0000000000F54000-memory.dmp

    Filesize

    8.3MB

  • memory/64-1-0x00000000754F0000-0x00000000754F1000-memory.dmp

    Filesize

    4KB

  • memory/64-9-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-2-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-60-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-3-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-126-0x0000000008710000-0x0000000008722000-memory.dmp

    Filesize

    72KB

  • memory/64-8-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-76-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-35-0x0000000000710000-0x0000000000F54000-memory.dmp

    Filesize

    8.3MB

  • memory/64-36-0x00000000754F0000-0x00000000754F1000-memory.dmp

    Filesize

    4KB

  • memory/64-80-0x0000000007540000-0x00000000075B6000-memory.dmp

    Filesize

    472KB

  • memory/64-107-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-108-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-81-0x0000000007710000-0x0000000007760000-memory.dmp

    Filesize

    320KB

  • memory/64-5-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/64-82-0x0000000007780000-0x000000000779E000-memory.dmp

    Filesize

    120KB

  • memory/2476-74-0x0000000006060000-0x00000000063B4000-memory.dmp

    Filesize

    3.3MB

  • memory/2992-139-0x0000000006000000-0x0000000006354000-memory.dmp

    Filesize

    3.3MB

  • memory/2992-142-0x00000000066B0000-0x00000000066FC000-memory.dmp

    Filesize

    304KB

  • memory/3676-100-0x0000000005E20000-0x0000000006174000-memory.dmp

    Filesize

    3.3MB

  • memory/3676-106-0x0000000006560000-0x00000000065AC000-memory.dmp

    Filesize

    304KB

  • memory/3676-109-0x0000000006A40000-0x0000000006A62000-memory.dmp

    Filesize

    136KB

  • memory/4324-120-0x0000000005420000-0x0000000005774000-memory.dmp

    Filesize

    3.3MB

  • memory/4756-17-0x0000000002A00000-0x0000000002A36000-memory.dmp

    Filesize

    216KB

  • memory/4756-59-0x0000000007950000-0x0000000007958000-memory.dmp

    Filesize

    32KB

  • memory/4756-63-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/4756-58-0x0000000007970000-0x000000000798A000-memory.dmp

    Filesize

    104KB

  • memory/4756-57-0x0000000007870000-0x0000000007884000-memory.dmp

    Filesize

    80KB

  • memory/4756-56-0x0000000007860000-0x000000000786E000-memory.dmp

    Filesize

    56KB

  • memory/4756-55-0x0000000007830000-0x0000000007841000-memory.dmp

    Filesize

    68KB

  • memory/4756-54-0x00000000078B0000-0x0000000007946000-memory.dmp

    Filesize

    600KB

  • memory/4756-53-0x00000000076A0000-0x00000000076AA000-memory.dmp

    Filesize

    40KB

  • memory/4756-52-0x0000000007630000-0x000000000764A000-memory.dmp

    Filesize

    104KB

  • memory/4756-51-0x0000000007C80000-0x00000000082FA000-memory.dmp

    Filesize

    6.5MB

  • memory/4756-50-0x0000000007550000-0x00000000075F3000-memory.dmp

    Filesize

    652KB

  • memory/4756-38-0x0000000007510000-0x0000000007542000-memory.dmp

    Filesize

    200KB

  • memory/4756-49-0x00000000068E0000-0x00000000068FE000-memory.dmp

    Filesize

    120KB

  • memory/4756-39-0x0000000070220000-0x000000007026C000-memory.dmp

    Filesize

    304KB

  • memory/4756-37-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/4756-34-0x0000000006340000-0x000000000638C000-memory.dmp

    Filesize

    304KB

  • memory/4756-33-0x0000000006300000-0x000000000631E000-memory.dmp

    Filesize

    120KB

  • memory/4756-32-0x0000000005E10000-0x0000000006164000-memory.dmp

    Filesize

    3.3MB

  • memory/4756-22-0x0000000005CA0000-0x0000000005D06000-memory.dmp

    Filesize

    408KB

  • memory/4756-21-0x0000000005C30000-0x0000000005C96000-memory.dmp

    Filesize

    408KB

  • memory/4756-20-0x0000000005B80000-0x0000000005BA2000-memory.dmp

    Filesize

    136KB

  • memory/4756-19-0x00000000054E0000-0x0000000005B08000-memory.dmp

    Filesize

    6.2MB

  • memory/4756-18-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB

  • memory/4756-16-0x00000000754D0000-0x00000000755C0000-memory.dmp

    Filesize

    960KB