njrat | hxxps://www[.]mediafire[.]com/file/sj2kyc9q925g6hg/Krasus+Bootstrapper[.]rar/file

Analysis

max time kernel
98s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-11-2024 12:21

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General

Target

https://www.mediafire.com/file/sj2kyc9q925g6hg/Krasus+Bootstrapper.rar/file

Score

10^/10

njrat krasus-pc discovery evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

Krasus-Pc

mingrelian.duckdns.org:4444

Mutex

cf0442d73ab4fa4b3573bef8feb3ee75

Attributes

reg_key
cf0442d73ab4fa4b3573bef8feb3ee75
splitter
|'|'|

Signatures

Njrat family
njrat
njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4696	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	Bootstrapper.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cf0442d73ab4fa4b3573bef8feb3ee75.exe	RtkAudioService64.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cf0442d73ab4fa4b3573bef8feb3ee75.exe	RtkAudioService64.exe

Executes dropped EXE 2 IoCs

pid	Process
4384	Bootstrapper.exe
2732	RtkAudioService64.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cf0442d73ab4fa4b3573bef8feb3ee75 = "\"C:\\Users\\Admin\\RtkAudioService64.exe\" .."	RtkAudioService64.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\cf0442d73ab4fa4b3573bef8feb3ee75 = "\"C:\\Users\\Admin\\RtkAudioService64.exe\" .."	RtkAudioService64.exe

Drops autorun.inf file 1 TTPs 5 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	C:\autorun.inf	RtkAudioService64.exe
File created	D:\autorun.inf	RtkAudioService64.exe
File created	F:\autorun.inf	RtkAudioService64.exe
File opened for modification	F:\autorun.inf	RtkAudioService64.exe
File created	C:\autorun.inf	RtkAudioService64.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	Bootstrapper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RtkAudioService64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2664	msedge.exe
2664	msedge.exe
4984	msedge.exe
4984	msedge.exe
2144	msedge.exe
2144	msedge.exe
3136	identity_helper.exe
3136	identity_helper.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe
2732	RtkAudioService64.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2732	RtkAudioService64.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 10 IoCs

pid	Process
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeRestorePrivilege	2264	7zG.exe
Token: 35	2264	7zG.exe
Token: SeSecurityPrivilege	2264	7zG.exe
Token: SeSecurityPrivilege	2264	7zG.exe
Token: SeDebugPrivilege	2732	RtkAudioService64.exe
Token: 33	2732	RtkAudioService64.exe
Token: SeIncBasePriorityPrivilege	2732	RtkAudioService64.exe
Token: 33	2732	RtkAudioService64.exe
Token: SeIncBasePriorityPrivilege	2732	RtkAudioService64.exe
Token: 33	2732	RtkAudioService64.exe
Token: SeIncBasePriorityPrivilege	2732	RtkAudioService64.exe
Token: 33	2732	RtkAudioService64.exe
Token: SeIncBasePriorityPrivilege	2732	RtkAudioService64.exe

Suspicious use of FindShellTrayWindow 40 IoCs

pid	Process
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
2264	7zG.exe
4984	msedge.exe

Suspicious use of SendNotifyMessage 24 IoCs

pid	Process
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe
4984	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 332	4984	msedge.exe	83
PID 4984 wrote to memory of 332	4984	msedge.exe	83
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 1144	4984	msedge.exe	84
PID 4984 wrote to memory of 2664	4984	msedge.exe	85
PID 4984 wrote to memory of 2664	4984	msedge.exe	85
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86
PID 4984 wrote to memory of 4052	4984	msedge.exe	86

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --start-maximized --single-argument https://www.mediafire.com/file/sj2kyc9q925g6hg/Krasus+Bootstrapper.rar/file
1⤵
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4984
- 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,0x100,0x104,0xd8,0x108,0x7ffa302e46f8,0x7ffa302e4708,0x7ffa302e4718
  2⤵
  PID:332
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2064 /prefetch:2
  2⤵
  PID:1144
- 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=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2324 /prefetch:3
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2664
- 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=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2744 /prefetch:8
  2⤵
  PID:4052
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --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=3320 /prefetch:1
  2⤵
  PID:2204
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --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=3344 /prefetch:1
  2⤵
  PID:4208
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5452 /prefetch:1
  2⤵
  PID:796
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5140 /prefetch:1
  2⤵
  PID:5068
- 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=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --service-sandbox-type=collections --mojo-platform-channel-handle=5856 /prefetch:8
  2⤵
  PID:2352
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5116 /prefetch:1
  2⤵
  PID:3096
- 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=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6028 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2144
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --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=6008 /prefetch:1
  2⤵
  PID:3608
- 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=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5592 /prefetch:8
  2⤵
  PID:3364
- 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=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5592 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3136
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --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=5292 /prefetch:1
  2⤵
  PID:2436
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --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=5576 /prefetch:1
  2⤵
  PID:584
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=18 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6272 /prefetch:1
  2⤵
  PID:4484
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2056,5416886117082129281,10740470477137279063,131072 --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=19 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3732 /prefetch:1
  2⤵
  PID:4584

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:4216

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:3136

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3792

C:\Program Files\7-Zip\7zG.exe
"C:\Program Files\7-Zip\7zG.exe" x -o"C:\Users\Admin\Downloads\" -an -ai#7zMap19480:100:7zEvent14399
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:2264

C:\Users\Admin\Downloads\Bootstrapper.exe
"C:\Users\Admin\Downloads\Bootstrapper.exe"
1⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4384
- C:\Users\Admin\RtkAudioService64.exe
  "C:\Users\Admin\RtkAudioService64.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops autorun.inf file
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:2732
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\RtkAudioService64.exe" "RtkAudioService64.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:4696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

Filesize
152B

MD5
99afa4934d1e3c56bbce114b356e8a99

SHA1
3f0e7a1a28d9d9c06b6663df5d83a65c84d52581

SHA256
08e098bb97fd91d815469cdfd5568607a3feca61f18b6b5b9c11b531fde206c8

SHA512
76686f30ed68144cf943b80ac10b52c74eee84f197cee3c24ef7845ef44bdb5586b6e530824543deeed59417205ac0e2559808bcb46450504106ac8f4c95b9da

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

Filesize
152B

MD5
443a627d539ca4eab732bad0cbe7332b

SHA1
86b18b906a1acd2a22f4b2c78ac3564c394a9569

SHA256
1e1ad9dce141f5f17ea07c7e9c2a65e707c9943f172b9134b0daf9eef25f0dc9

SHA512
923b86d75a565c91250110162ce13dd3ef3f6bdde1a83f7af235ed302d4a96b8c9ed722e2152781e699dfcb26bb98afc73f5adb298f8fd673f14c9f28b5f764d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Code Cache\js\index-dir\the-real-index

Filesize
1KB

MD5
d55c1b77503159ed1475c15c9ff94346

SHA1
3ad4678c181cb50eb956c44a31d9e5f7bf02af5c

SHA256
bb15fee028107eac4525a7a1b4dc23c3a4a6bf12049c8544ff4bd10ebe1ed115

SHA512
9d40404da10adeb981fecd21e4ca49faeafb0bfa6d0b6951a2037780cb19c630bb3306e0302baba589b51bb6c93ae5092b267ce8cff5977ec347530b3ac40bbd

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State

Filesize
4KB

MD5
498641331f9d6b99d3dee9939a9f2a0f

SHA1
18ef8c65ae84d70acbf113617f3bad38ac5f7e72

SHA256
5933e87e7262702401ab3c1c6fb6d6df1658d5358468ecffcbce115ba94c193b

SHA512
365ad413d3a3d11f100fe908f546aedb07c75f03b68c05e7d49acf356f168ccebd3a2d92ec49c8af25166a444def6d190bc63ad5eb8ae36bede7f1439de7174a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

Filesize
8KB

MD5
08dc3c5f6d77f424bd6f3c96da9e6c90

SHA1
8cf88b0b1cbb4ef486481912e412c97f7b09c3ae

SHA256
84d2a68b7a139afe85382659da3c26beb3c8c48e35a3bb8592a9c70a08667c27

SHA512
0e73f740184e15e0c03b590b0010842aa972a4fc8d1b08cf341364ac77e42c4320dc47d92c4bd41f5600392ecbca919422b4fd8cfb6a5f37b566bcd3b42bf074

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

Filesize
5KB

MD5
2d5d47a59b31514e03432525dde025f3

SHA1
0d8010837edbb76bdd5dc9c7884bb35d58a5a610

SHA256
899072111de1f6bd832dc29d8a9afdfd31c9ad3c8734da2a4a95d8127f02fa55

SHA512
f197b4e914a7721396a7ff32f40881fef9fecb92aad70f7964b52ed82cd3a77236a454caae6c298527083f3177edf9d0d233cb9143a4fbed6a175b6c114b0f3c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

Filesize
8KB

MD5
55a66722087ba24f91bacec52c225e64

SHA1
c1c2b78c3cb6844eafa196759d7976796aca7414

SHA256
0c87404db7835bf9685d8129b6688554ce46cf788fdb92df0faa17d633ff6666

SHA512
cb6470095c1f9f46ccffbde0f0c6c190554da71545ec61cea5e05c79096942e5e78ec790956cf727165a1bb457dba13487ecff56def1486933d6848414af431e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\000002.dbtmp

Filesize
16B

MD5
206702161f94c5cd39fadd03f4014d98

SHA1
bd8bfc144fb5326d21bd1531523d9fb50e1b600a

SHA256
1005a525006f148c86efcbfb36c6eac091b311532448010f70f7de9a68007167

SHA512
0af09f26941b11991c750d1a2b525c39a8970900e98cba96fd1b55dbf93fee79e18b8aab258f48b4f7bda40d059629bc7770d84371235cdb1352a4f17f80e145

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

Filesize
16B

MD5
46295cac801e5d4857d09837238a6394

SHA1
44e0fa1b517dbf802b18faf0785eeea6ac51594b

SHA256
0f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443

SHA512
8969402593f927350e2ceb4b5bc2a277f3754697c1961e3d6237da322257fbab42909e1a742e22223447f3a4805f8d8ef525432a7c3515a549e984d3eff72b23

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

Filesize
11KB

MD5
1728be57c55a4fa7e988eb03af6b6934

SHA1
361442db9b8d080c970664392b480fc740eed39e

SHA256
0bbadc22c87d1766324645f0dc58e62be6f9c4b5d31c2f2518edfff537e7975d

SHA512
59a766b291e1128438a8cde9f67b897fbabfc68857ec3919033446a62bfcb79df4dcb9408046b61f68d6fb496711c15d793b34924a27c82b5d17cecfe229ae8e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

Filesize
10KB

MD5
a96259f95dd17e98b256042823ab37ed

SHA1
dec06983eee14bac3bef62562361a9c3a49f6171

SHA256
570c5ed0a444084aa16cddccbe132ca3bd66032b39d9eb3580eb01d86928c166

SHA512
08018c28a1ce329c344f578f6e4f17f44d88cd7db2604b20d4377a92e32029f19e154b5014e5819e3d8432a80b278977b6f1bdda7caf081b055c0c98fa1ae5d1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

Filesize
10KB

MD5
a67de6a66b013d6eb1640a5733783f25

SHA1
11d0f0269b74e1d23d2d59eb2650a7ce39862a9a

SHA256
fc62cfa01a1efd2ba49a686a4812a66cdc47085462a4b489ee2d3f5e438d9817

SHA512
1246259723c3073ee6f2a3affb3b294181072e92e972f742cff46ca972861b5dd209b7a187566e3e5b5d37c9892e8d86d61595bed5ba0f313e4970b019645805

Download Submit
C:\Users\Admin\Downloads\Bootstrapper.exe

Filesize
37KB

MD5
e08d7967557238a0ee488e405f7865dd

SHA1
b4428239dff65be117076a6d2169c1f5488e098e

SHA256
3ba9088ef4662608ccdb45a1333d4a5c9970fa90acdfdff4787233b8e4aa23d4

SHA512
f9d197250afbdffb9d7081f87b94687d1cd7d53f7901e0b402444f5e8f9c9df76b8b1ff25d44246231468de3a13bfa5b0d61755bd341bac191bef7ba0d51da81

Download Submit
C:\Users\Admin\Downloads\Krasus Bootstrapper.rar

Filesize
16KB

MD5
c0e9d70f45376d9d3c21a9d679315849

SHA1
c12b6cd3d8d3f508d2d2be27d6b93f701982e2a1

SHA256
bba44b29ff112dcd2811dbd2074a12be674b56bcb82c53aa201f4c3320760679

SHA512
8b807711669efff732ebd25ea274da9c0f925999f69f48ae4186b8abe4f89813d3e80c6f3930ea486ec61601c797662fda1f9722f801f578722c3637f9611d21

Download Submit