1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a

General

Target

1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a.exe
Size

52KB
MD5

017dc4ca721b009fc192e818168776fd
SHA1

61a982bbc9dd517badcbc1dbcfff49761fcb5190
SHA256

1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a
SHA512

f15907d9013c93495c6414e63c73455515aa7345afbc52db821855d5ea9c1d0aad9994234e9364d9ae8a737265cf4bc2b197b6cf84bb8ad907b9ee4afbce9ca5

Score

8^/10

aspackv2

Malware Config

Signatures

ASPack v2.12-2.42 2 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\RbuXxy.exe	aspack_v212_v242
C:\Users\Admin\AppData\Local\Temp\RbuXxy.exe	aspack_v212_v242

Executes dropped EXE 1 IoCs

Processes:

RbuXxy.exe

pid process

5052 RbuXxy.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

Processes:

RbuXxy.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation RbuXxy.exe

pid	process
5052	RbuXxy.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	RbuXxy.exe

Drops file in Program Files directory 64 IoCs

Processes:

RbuXxy.exe

description	ioc	process
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\javaws.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\servertool.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.ScreenSketch_10.1907.2471.0_x64__8wekyb3d8bbwe\ScreenSketch.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\appletviewer.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\xjc.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\protocolhandler.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\MSOICONS.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\Common.DBConnection64.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.StorePurchaseApp_11811.1001.18.0_x64__8wekyb3d8bbwe\StoreExperienceHost.exe	RbuXxy.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\jstat.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\jabswitch.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\POWERPNT.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PPTICO.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\SkypeBridge\SkypeBridge.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\PilotshubApp.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsStore_11910.1002.5.0_x64__8wekyb3d8bbwe\WinStore.App.exe	RbuXxy.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroBroker.exe	RbuXxy.exe
File opened for modification	C:\Program Files\7-Zip\7z.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\jre\bin\javacpl.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\jre\bin\ssvagent.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\msoasb.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\VPREVIEW.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\EQUATION\eqnedt32.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\89.0.4389.114\chrome_pwa_launcher.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\jmap.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\orbd.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\rmid.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Client\AppVDllSurrogate64.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Mozilla Firefox\maintenanceservice.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1906.55.0_x64__8wekyb3d8bbwe\Calculator.exe	RbuXxy.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroLayoutRecognizer\AcroLayoutRecognizer.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\tnameserv.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSQRY32.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MixedReality.Portal_2000.19081.1301.0_x64__8wekyb3d8bbwe\MixedRealityPortal.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\officeappguardwin32.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Microsoft3DViewer_6.1908.2042.0_x64__8wekyb3d8bbwe\View3D.ResourceResolver.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Xbox.TCUI_1.23.28002.0_x64__8wekyb3d8bbwe\TCUI-App.exe	RbuXxy.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.71\GoogleUpdateComRegisterShell64.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\javac.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\tnameserv.exe	RbuXxy.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\javadoc.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\SDXHelperBgt.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\SELFCERT.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\java.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\SPREADSHEETCOMPARE.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Getstarted_8.2.22942.0_x64__8wekyb3d8bbwe\WhatsNew.Store.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\jrunscript.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jre1.8.0_66\bin\klist.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.NetFX45.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\CLVIEW.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\msotd.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\SkypeSrv\SKYPESERVER.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\native2ascii.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\jre\bin\rmid.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MSPaint_6.1907.29027.0_x64__8wekyb3d8bbwe\PaintStudio.View.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\HxAccounts.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\HxCalendarAppImm.exe	RbuXxy.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Java\jdk1.8.0_66\bin\wsimport.exe	RbuXxy.exe
File opened for modification	C:\Program Files\Microsoft Office\Office16\OSPPREARM.EXE	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.30251.0_x64__8wekyb3d8bbwe\AppInstallerElevatedAppServiceClient.exe	RbuXxy.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_x64__8wekyb3d8bbwe\onenoteim.exe	RbuXxy.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a.exeRbuXxy.exe

description	pid	process	target process
PID 556 wrote to memory of 5052	556	1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a.exe	RbuXxy.exe
PID 556 wrote to memory of 5052	556	1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a.exe	RbuXxy.exe
PID 556 wrote to memory of 5052	556	1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a.exe	RbuXxy.exe
PID 5052 wrote to memory of 3068	5052	RbuXxy.exe	cmd.exe
PID 5052 wrote to memory of 3068	5052	RbuXxy.exe	cmd.exe
PID 5052 wrote to memory of 3068	5052	RbuXxy.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a.exe
"C:\Users\Admin\AppData\Local\Temp\1ac73d515c89d782e889ea9ba68f0b0eb3a80fb15247ecc81841613d8a057e7a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:556

C:\Users\Admin\AppData\Local\Temp\RbuXxy.exe
C:\Users\Admin\AppData\Local\Temp\RbuXxy.exe
2⤵
- Executes dropped EXE
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:5052

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\56c81d46.bat" "
3⤵
PID:3068

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\56c81d46.bat
Filesize
187B

MD5
9290d0148e800a7b0e1b20977a1ab4f7

SHA1
3f8762da03fe95cf79b820e41589c735df8160ee

SHA256
05219171eb40224f9aa7c5523990ca69b8a60e00d6e2a8c73666b6b7a0176f96

SHA512
d222bfdf78561307341f83338b7fbf0c2cff729be9e9bea8cc5a115ef6887f8d87632b74e1e9805a7102fc38c9e38de17dfe3fb55dd76c68689044a23fd2e898

Download Submit
C:\Users\Admin\AppData\Local\Temp\RbuXxy.exe
Filesize
15KB

MD5
56b2c3810dba2e939a8bb9fa36d3cf96

SHA1
99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

SHA256
4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

SHA512
27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

Download Submit
C:\Users\Admin\AppData\Local\Temp\RbuXxy.exe
Filesize
15KB

MD5
56b2c3810dba2e939a8bb9fa36d3cf96

SHA1
99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

SHA256
4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

SHA512
27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

Download Submit
memory/556-130-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/556-135-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/3068-136-0x0000000000000000-mapping.dmp

Download
memory/5052-131-0x0000000000000000-mapping.dmp

Download
memory/5052-134-0x0000000000F40000-0x0000000000F49000-memory.dmp

Filesize
36KB

Download
memory/5052-137-0x0000000000F40000-0x0000000000F49000-memory.dmp

Filesize
36KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads