Analysis

  • max time kernel
    94s
  • max time network
    139s
  • 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 09:32

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:1736
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2692
    • 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:4092
    • 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:3504
    • 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:740
    • 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:2440
    • 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:2060
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:4788
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1096
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1856
    • 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:1744
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic" path win32_VideoController get name
      2⤵
      • System Location Discovery: System Language Discovery
      • Detects videocard installed
      PID:2608
    • 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:4168
      • 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:4884

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

    968cb9309758126772781b83adb8a28f

    SHA1

    8da30e71accf186b2ba11da1797cf67f8f78b47c

    SHA256

    92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

    SHA512

    4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

    Filesize

    15KB

    MD5

    3cfd0caeac44a4cbf3931b00d83a07ed

    SHA1

    994a460f64cd3db67c4c259ae7ddd52938d1a1cf

    SHA256

    61579d3c6a1b8d1dfdb71d70fbce7329ac83cdce59e0a192cc9b72b711cebb86

    SHA512

    bdade84e338add39e47aeec313d6d9992635fafb993125b1fdb18814b9d06377cd224a195b3237bb49356562ce175d7276a5fde0f91d78927188299cab723760

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

    Filesize

    18KB

    MD5

    68a5034d9cb0bd61e8e14e8590831e1c

    SHA1

    bf14897162ae4daedae9e0f11193e58a4d61981e

    SHA256

    d31168ae187922fd979dca8c323cac0d621fb6446d9ee71ad35a13d76a8788cd

    SHA512

    d81fe0d78e32584121331406e99219643231a2607132537f664ee824fe1c9fbc1fbcf644b9713c1b5690d39f1c5974c8b10e67afaa4ae4c3d796cc6a61850eed

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

    Filesize

    17KB

    MD5

    e99dff0caf5f514a439ec15efe8f919a

    SHA1

    1a3629aaaaa93aa6f8f3303ef25e0f64a0d01c1b

    SHA256

    cc7729a15f724a3c81f5362c5f80bad55dd2572dd2ad75000db3312e639ccc81

    SHA512

    873b63052eb1437f7c407b8680ecb3700625149b222e2df50aca72d942440607815a071235f941dbc064c3ddda4dbe14eb0cb8d20c3de0a18380235cd23bbddc

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

    Filesize

    18KB

    MD5

    15bc97867459e22eeab4f242125d03fc

    SHA1

    38cbd1cbea2c28883f9a29cbf331b85291d381fe

    SHA256

    d339899ea401ac3cf842bb3d0b7e637933ae104f083f756a624437d550ecfb4a

    SHA512

    0b813d5f353dc41979c27e1dd55b0a9f0950eb9aeac96d0b023e86fee48d7a79238805e64b452fd092ce945ad61e6165cc1c6bf4fb8e430325c227ea32ff40fc

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ijcbf42z.j3b.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/740-81-0x0000000005650000-0x00000000059A4000-memory.dmp

    Filesize

    3.3MB

  • memory/1736-8-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-7-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-87-0x00000000076A0000-0x00000000076F0000-memory.dmp

    Filesize

    320KB

  • memory/1736-12-0x00000000003B0000-0x0000000000BF4000-memory.dmp

    Filesize

    8.3MB

  • memory/1736-13-0x00000000003B0000-0x0000000000BF4000-memory.dmp

    Filesize

    8.3MB

  • memory/1736-14-0x0000000005B00000-0x0000000005B92000-memory.dmp

    Filesize

    584KB

  • memory/1736-15-0x0000000006150000-0x00000000066F4000-memory.dmp

    Filesize

    5.6MB

  • memory/1736-16-0x00000000003B0000-0x0000000000BF4000-memory.dmp

    Filesize

    8.3MB

  • memory/1736-17-0x0000000075910000-0x0000000075911000-memory.dmp

    Filesize

    4KB

  • memory/1736-18-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-0-0x00000000003B0000-0x0000000000BF4000-memory.dmp

    Filesize

    8.3MB

  • memory/1736-154-0x00000000003B0000-0x0000000000BF4000-memory.dmp

    Filesize

    8.3MB

  • memory/1736-155-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-63-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-23-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-9-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-21-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-6-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-130-0x00000000077B0000-0x00000000077C2000-memory.dmp

    Filesize

    72KB

  • memory/1736-129-0x0000000007740000-0x000000000774A000-memory.dmp

    Filesize

    40KB

  • memory/1736-5-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-2-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-3-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-4-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-42-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-41-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-1-0x0000000075910000-0x0000000075911000-memory.dmp

    Filesize

    4KB

  • memory/1736-43-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-111-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/1736-86-0x00000000074D0000-0x0000000007546000-memory.dmp

    Filesize

    472KB

  • memory/1736-88-0x0000000007720000-0x000000000773E000-memory.dmp

    Filesize

    120KB

  • memory/1744-146-0x0000000006C90000-0x0000000006CDC000-memory.dmp

    Filesize

    304KB

  • memory/1744-140-0x0000000005FD0000-0x0000000006324000-memory.dmp

    Filesize

    3.3MB

  • memory/2440-110-0x00000000062F0000-0x0000000006644000-memory.dmp

    Filesize

    3.3MB

  • memory/2440-113-0x0000000006D40000-0x0000000006D8C000-memory.dmp

    Filesize

    304KB

  • memory/2440-114-0x0000000006CB0000-0x0000000006CD2000-memory.dmp

    Filesize

    136KB

  • memory/3504-19-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/3504-62-0x00000000070D0000-0x00000000070E1000-memory.dmp

    Filesize

    68KB

  • memory/3504-64-0x0000000007100000-0x000000000710E000-memory.dmp

    Filesize

    56KB

  • memory/3504-65-0x0000000007110000-0x0000000007124000-memory.dmp

    Filesize

    80KB

  • memory/3504-66-0x0000000007210000-0x000000000722A000-memory.dmp

    Filesize

    104KB

  • memory/3504-67-0x00000000071F0000-0x00000000071F8000-memory.dmp

    Filesize

    32KB

  • memory/3504-70-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/3504-61-0x0000000007150000-0x00000000071E6000-memory.dmp

    Filesize

    600KB

  • memory/3504-60-0x0000000006F40000-0x0000000006F4A000-memory.dmp

    Filesize

    40KB

  • memory/3504-59-0x0000000006ED0000-0x0000000006EEA000-memory.dmp

    Filesize

    104KB

  • memory/3504-58-0x0000000007510000-0x0000000007B8A000-memory.dmp

    Filesize

    6.5MB

  • memory/3504-57-0x0000000006D90000-0x0000000006E33000-memory.dmp

    Filesize

    652KB

  • memory/3504-56-0x0000000006D70000-0x0000000006D8E000-memory.dmp

    Filesize

    120KB

  • memory/3504-46-0x00000000707A0000-0x00000000707EC000-memory.dmp

    Filesize

    304KB

  • memory/3504-45-0x0000000006170000-0x00000000061A2000-memory.dmp

    Filesize

    200KB

  • memory/3504-44-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/3504-40-0x0000000005BD0000-0x0000000005C1C000-memory.dmp

    Filesize

    304KB

  • memory/3504-39-0x0000000005BA0000-0x0000000005BBE000-memory.dmp

    Filesize

    120KB

  • memory/3504-38-0x00000000056B0000-0x0000000005A04000-memory.dmp

    Filesize

    3.3MB

  • memory/3504-28-0x0000000005530000-0x0000000005596000-memory.dmp

    Filesize

    408KB

  • memory/3504-26-0x0000000005320000-0x0000000005342000-memory.dmp

    Filesize

    136KB

  • memory/3504-27-0x00000000054C0000-0x0000000005526000-memory.dmp

    Filesize

    408KB

  • memory/3504-22-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/3504-25-0x0000000004CF0000-0x0000000005318000-memory.dmp

    Filesize

    6.2MB

  • memory/3504-24-0x00000000758F0000-0x00000000759E0000-memory.dmp

    Filesize

    960KB

  • memory/3504-20-0x00000000022E0000-0x0000000002316000-memory.dmp

    Filesize

    216KB