agenttesla | hxxps://cdn[.]discordapp[.]com/attachments/1255278764032659466/1282423283752632452/steamapplicationupdater[.]exe?ex=66e29901&is=66e14781&hm=465f85149581167384db216ee91d19d1792df55a667d789ef9654d2da27badf5&

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	steamapplicationupdater.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	steamapplicationupdater.exe

Downloads MZ/PE file

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	steamapplicationupdater.exe

Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Checks BIOS information in registry 2 TTPs 4 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	steamapplicationupdater.exe

Executes dropped EXE 2 IoCs

pid	Process
4368	steamapplicationupdater.exe
3240	steamapplicationupdater.exe

Loads dropped DLL 2 IoCs

pid	Process
4368	steamapplicationupdater.exe
3240	steamapplicationupdater.exe

Themida packer 7 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/files/0x000a000000023288-65.dat	themida
behavioral1/memory/4368-94-0x0000000000400000-0x00000000011BA000-memory.dmp	themida
behavioral1/memory/4368-95-0x0000000000400000-0x00000000011BA000-memory.dmp	themida
behavioral1/memory/4368-218-0x0000000000400000-0x00000000011BA000-memory.dmp	themida
behavioral1/memory/3240-223-0x0000000000400000-0x00000000011BA000-memory.dmp	themida
behavioral1/memory/3240-224-0x0000000000400000-0x00000000011BA000-memory.dmp	themida
behavioral1/memory/3240-228-0x0000000000400000-0x00000000011BA000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	steamapplicationupdater.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

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

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	steamapplicationupdater.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4368	steamapplicationupdater.exe
3240	steamapplicationupdater.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
804	sc.exe
2032	sc.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Enumerates system info in registry 2 TTPs 9 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	msedge.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	steamapplicationupdater.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	steamapplicationupdater.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	msedge.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Downloads\Unconfirmed 700546.crdownload:SmartScreen	msedge.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4324	msedge.exe
4324	msedge.exe
412	msedge.exe
412	msedge.exe
1868	identity_helper.exe
1868	identity_helper.exe
4600	msedge.exe
4600	msedge.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe
4368	steamapplicationupdater.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 10 IoCs

pid	Process
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4368	steamapplicationupdater.exe
Token: SeDebugPrivilege	3240	steamapplicationupdater.exe

Suspicious use of FindShellTrayWindow 56 IoCs

pid	Process
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe

Suspicious use of SendNotifyMessage 24 IoCs

pid	Process
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe
412	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 2608	412	msedge.exe	83
PID 412 wrote to memory of 2608	412	msedge.exe	83
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4716	412	msedge.exe	84
PID 412 wrote to memory of 4324	412	msedge.exe	85
PID 412 wrote to memory of 4324	412	msedge.exe	85
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86
PID 412 wrote to memory of 3280	412	msedge.exe	86

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://cdn.discordapp.com/attachments/1255278764032659466/1282423283752632452/steamapplicationupdater.exe?ex=66e29901&is=66e14781&hm=465f85149581167384db216ee91d19d1792df55a667d789ef9654d2da27badf5&
1⤵
- Enumerates system info in registry
- NTFS ADS
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:412
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ffa591d46f8,0x7ffa591d4708,0x7ffa591d4718
  2⤵
  PID:2608
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2108 /prefetch:2
  2⤵
  PID:4716
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2208 /prefetch:3
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4324
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2680 /prefetch:8
  2⤵
  PID:3280
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3332 /prefetch:1
  2⤵
  PID:440
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3348 /prefetch:1
  2⤵
  PID:2208
- C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5436 /prefetch:8
  2⤵
  PID:1880
- C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5436 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1868
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=edge_collections.mojom.CollectionsDataManager --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --service-sandbox-type=collections --mojo-platform-channel-handle=5508 /prefetch:8
  2⤵
  PID:1020
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4760 /prefetch:1
  2⤵
  PID:4848
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5736 /prefetch:1
  2⤵
  PID:1840
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilReadIcon --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --service-sandbox-type=icon_reader --mojo-platform-channel-handle=6016 /prefetch:8
  2⤵
  PID:4268
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3432 /prefetch:1
  2⤵
  PID:664
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=15 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3388 /prefetch:1
  2⤵
  PID:1996
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=16 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6108 /prefetch:1
  2⤵
  PID:3596
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=17 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4200 /prefetch:1
  2⤵
  PID:440
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6444 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4600
- C:\Users\Admin\Downloads\steamapplicationupdater.exe
  "C:\Users\Admin\Downloads\steamapplicationupdater.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Looks for VirtualBox Guest Additions in registry
  - Looks for VMWare Tools registry key
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - Maps connected drives based on registry
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4368
- - C:\Windows\SysWOW64\sc.exe
    "sc.exe" stop dps
    3⤵
    - Launches sc.exe
    - System Location Discovery: System Language Discovery
    PID:2032
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=19 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6112 /prefetch:1
  2⤵
  PID:4936
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,15402381411141247564,17650693925066709270,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=20 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3732 /prefetch:1
  2⤵
  PID:4616

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:804

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:920

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1076

C:\Users\Admin\Downloads\steamapplicationupdater.exe
"C:\Users\Admin\Downloads\steamapplicationupdater.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
- Maps connected drives based on registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:3240
- C:\Windows\SysWOW64\sc.exe
  "sc.exe" stop dps
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Virtualization/Sandbox Evasion

Credential Access

Discovery

Browser Information Discovery

T1217

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion