arkei | c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21

Analysis

max time kernel
135s
max time network
107s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
25-07-2024 05:54

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General

Target

c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21.exe
Size

281KB
MD5

a131f7c0c6109b3d701767b24a1ec9b8
SHA1

2d42e6211039255898af5606ce8f7c60b31782de
SHA256

c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21
SHA512

a7724856692645bf37c3504771895cda1d75e9d09a9b15d923e0bd5aa323c9949ff5fe790724eb89b4cdeb3631688b5d07edb2d2bdbb2ef6462ac72cebd001fd
SSDEEP

6144:8oTJaMlWeC/iKbHiiq1YmNin91Izx2KQcVWMo4:8uzlWeC/iKbfeSnox7

Score

10^/10

arkei default aspackv2 discovery stealer

Malware Config

Extracted

Family

arkei

Botnet

Default

coin-file-file-19.com/tratata.php

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x00090000000233de-3.dat	aspack_v212_v242

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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	brTOGrD.exe

Executes dropped EXE 1 IoCs

pid	Process
2252	brTOGrD.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jarsigner.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\jp2launcher.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\OLicenseHeartbeat.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Mozilla Firefox\uninstall\helper.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Getstarted_8.2.22942.0_x64__8wekyb3d8bbwe\WhatsNew.Store.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javapackager.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jinfo.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\java.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\javacpl.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\msoasb.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DWTRIG20.EXE	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\MSOICONS.EXE	brTOGrD.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\createdump.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jcmd.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.30251.0_x64__8wekyb3d8bbwe\AppInstallerPythonRedirector.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Eula.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\123.0.6312.106\chrome_pwa_launcher.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Windows Mail\wabmig.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\HxAccounts.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrServicesUpdater.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\Uninstall.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jdeps.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\rmiregistry.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Mozilla Firefox\crashreporter.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.371\GoogleUpdateCore.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\wab.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PDFREFLOW.EXE	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\SkypeApp.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Google\Update\Download\{8A69D345-D564-463C-AFF1-A69D9E530F96}\123.0.6312.106\chrome_installer.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\native2ascii.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\keytool.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\servertool.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.BingWeather_4.25.20211.0_x64__8wekyb3d8bbwe\Microsoft.Msn.Weather.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.30251.0_x64__8wekyb3d8bbwe\AppInstallerElevatedAppServiceClient.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.StorePurchaseApp_11811.1001.18.0_x64__8wekyb3d8bbwe\StoreExperienceHost.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Google\Update\DisabledGoogleUpdate.exe	brTOGrD.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Windows Mail\wab.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jjs.exe	brTOGrD.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\createdump.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\kinit.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\javacpl.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Windows Photo Viewer\ImagingDevices.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jstat.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\klist.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\MSOXMLED.EXE	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jabswitch.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\wsimport.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\LocalBridge.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MixedReality.Portal_2000.19081.1301.0_x64__8wekyb3d8bbwe\MixedRealityPortal.Brokered.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Wallet_2.4.18324.0_x64__8wekyb3d8bbwe\Microsoft.Wallet.exe	brTOGrD.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\wow_helper.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\SDXHelperBgt.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\HxOutlook.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\tnameserv.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Mozilla Firefox\maintenanceservice.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_10.1906.1972.0_x64__8wekyb3d8bbwe\SoundRec.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\java-rmi.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Client\AppVLP.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Integration\Integrator.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsCamera_2018.826.98.0_x64__8wekyb3d8bbwe\WindowsCamera.exe	brTOGrD.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1906.1972.0_x64__8wekyb3d8bbwe\Maps.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javaws.exe	brTOGrD.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jrunscript.exe	brTOGrD.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1484	3964	WerFault.exe	85

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	c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	brTOGrD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3964 wrote to memory of 2252	3964	c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21.exe	86
PID 3964 wrote to memory of 2252	3964	c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21.exe	86
PID 3964 wrote to memory of 2252	3964	c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21.exe	86
PID 2252 wrote to memory of 4728	2252	brTOGrD.exe	90
PID 2252 wrote to memory of 4728	2252	brTOGrD.exe	90
PID 2252 wrote to memory of 4728	2252	brTOGrD.exe	90

C:\Users\Admin\AppData\Local\Temp\c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21.exe
"C:\Users\Admin\AppData\Local\Temp\c634d3b81cf3991d24b037fdb80bacfb576216c3768149432b3e799583ef7b21.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Users\Admin\AppData\Local\Temp\brTOGrD.exe
  C:\Users\Admin\AppData\Local\Temp\brTOGrD.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2252
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\4922040b.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4728
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3964 -s 560
  2⤵
  - Program crash
  PID:1484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3964 -ip 3964
1⤵
PID:1564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\MQYRE6E5\k2[1].rar

Filesize
4B

MD5
d3b07384d113edec49eaa6238ad5ff00

SHA1
f1d2d2f924e986ac86fdf7b36c94bcdf32beec15

SHA256
b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c

SHA512
0cf9180a764aba863a67b6d72f0918bc131c6772642cb2dce5a34f0a702f9470ddc2bf125c12198b1995c233c34b4afd346c54a2334c350a948a51b6e8b4e6b6

Download Submit
C:\Users\Admin\AppData\Local\Temp\4922040b.bat

Filesize
189B

MD5
1ed35c99c4dbdb11466277336334b954

SHA1
378823ec0a6e56f6b644a7b428ce2399e9ee0f33

SHA256
afbf020166d2692f0ed22f104cbd4a6b729e18b95508f5f1633882a7ca309ae1

SHA512
23be0f25633da8fe86ec8c469e33c65a0a7ac7c41200aa9ef32fbadd4375bcfc7ac35a9ddc7062b7a8595f96f46086ef1ae3ad25a682d998ff04b93d01f2c892

Download Submit
C:\Users\Admin\AppData\Local\Temp\53413994.exe

Filesize
4B

MD5
20879c987e2f9a916e578386d499f629

SHA1
c7b33ddcc42361fdb847036fc07e880b81935d5d

SHA256
9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31

SHA512
bcdde1625364dd6dd143b45bdcec8d59cf8982aff33790d390b839f3869e0e815684568b14b555a596d616252aeeaa98dac2e6e551c9095ea11a575ff25ff84f

Download Submit
C:\Users\Admin\AppData\Local\Temp\brTOGrD.exe

Filesize
15KB

MD5
f7d21de5c4e81341eccd280c11ddcc9a

SHA1
d4e9ef10d7685d491583c6fa93ae5d9105d815bd

SHA256
4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794

SHA512
e4553b86b083996038bacfb979ad0b86f578f95185d8efac34a77f6cc73e491d4f70e1449bbc9eb1d62f430800c1574101b270e1cb0eeed43a83049a79b636a3

Download Submit
memory/2252-5-0x0000000000370000-0x0000000000379000-memory.dmp

Filesize
36KB

Download
memory/2252-49-0x0000000000370000-0x0000000000379000-memory.dmp

Filesize
36KB

Download
memory/3964-0-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-15-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/3964-17-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3964-16-0x00000000021D0000-0x00000000021EF000-memory.dmp

Filesize
124KB

Download
memory/3964-51-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/3964-52-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download