28a0dc2ddd38f84f0be90191ebc74d7bdcd75d1a16a2d89145a07edcb5e7c859

Analysis

max time kernel
120s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
04/09/2024, 11:12

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General

Target

a3ef103e2019747c40537c46a08fc0a0N.exe
Size

28KB
MD5

a3ef103e2019747c40537c46a08fc0a0
SHA1

6ad60aa4ec47a2f75ba23549c755554016b2119c
SHA256

28a0dc2ddd38f84f0be90191ebc74d7bdcd75d1a16a2d89145a07edcb5e7c859
SHA512

e1804c92fa948cb874e9e6cb86f40bcc8ddd21ce22bb60aceb0d1b457b0029096e7dbbf27f216586fb38526ab02a41b89face4d8240c0bad6f5d04528a5d1572
SSDEEP

768:kBT37CPKKdJJ1EXBwzEXBwdcMcI93i/g8i/gR:CTW7JJ7Txi/g8i/gR

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4682) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1608-0-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral2/files/0x00090000000233fc-2.dat	upx
behavioral2/files/0x0004000000022922-6.dat	upx
behavioral2/memory/1608-1031-0x0000000000400000-0x000000000040A000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Java\jdk-1.8\jre\lib\security\policy\unlimited\US_export_policy.jar.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProMSDNR_Retail-pl.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.contrast-black_scale-80.png.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\zh-Hans\System.Windows.Controls.Ribbon.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-locale-l1-1-0.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Trial-ul-oob.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp-ul-oob.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\es\System.Windows.Forms.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jre-1.8\bin\splashscreen.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Forms.Primitives.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-datetime-l1-1-0.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription3-pl.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_SubTrial-ul-oob.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Windows.Forms.Primitives.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\WindowsFormsIntegration.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.Claims.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\UIAutomationClient.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Retail-ul-phn.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019VL_MAK_AE-ppd.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_KMS_Client_AE-ul-oob.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail-ul-oob.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\System.Xaml.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\System.Windows.Forms.Design.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-processenvironment-l1-1-0.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\jrunscript.exe.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-sysinfo-l1-1-0.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\Office16\OSPP.HTM.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ValueTuple.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Security.Principal.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.ReportingServices.Authorization.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-sysinfo-l1-1-0.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_OEM_Perp-ul-phn.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\CLVIEW.EXE.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\CSS7DATA0009.DLL.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.sl-si.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaBrightDemiBold.ttf.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.reportviewer.common.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Runtime.InteropServices.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Integration\C2RManifest.powerpointmui.msi.16.en-us.xml.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-3102-0000-1000-0000000FF1CE.xml.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\MSIPC\pt-BR\msipc.dll.mui.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.lv-lv.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\it\System.Xaml.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\pl\UIAutomationTypes.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_Retail-ppd.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.TextWriterTraceListener.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Reflection.Emit.ILGeneration.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\PresentationCore.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_OEM_Perp-pl.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Collections.Specialized.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Threading.AccessControl.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Office 2007 - 2010.eftx.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial1-pl.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial5-ppd.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-convert-l1-1-0.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.Process.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\PresentationFramework.resources.dll.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_Grace-ul-oob.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\CT_ROOTS.XML.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.contrast-white_scale-100.png.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\pack200.exe.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Java\jdk-1.8\legal\jdk\xerces.md.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\bn.pak.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProXC2RVL_KMS_ClientC2R-ppd.xrm-ms.tmp	a3ef103e2019747c40537c46a08fc0a0N.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	a3ef103e2019747c40537c46a08fc0a0N.exe

C:\Users\Admin\AppData\Local\Temp\a3ef103e2019747c40537c46a08fc0a0N.exe
"C:\Users\Admin\AppData\Local\Temp\a3ef103e2019747c40537c46a08fc0a0N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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:\$Recycle.Bin\S-1-5-21-355097885-2402257403-2971294179-1000\desktop.ini.tmp

Filesize
29KB

MD5
342bbe26704d3b236a2e7cb174a37e96

SHA1
2480742f08dbb53c54e8678b022b1c17a4de844d

SHA256
907d701a1578583eec1383c826264e8e9959269f8f8dfcdfcd97f0657f203b96

SHA512
45f5737c7b3c2866a4fe5d5e9493c99aeb3de0e156365454d9b612782f001d63cc8d0bacd5119420f748493033b42548e296e52a0f0c21154ff898edef80ec15

Download Submit
C:\Program Files\7-Zip\7-zip.dll.tmp

Filesize
127KB

MD5
fd345a6d726c48a8049b4c9cc460cee6

SHA1
0f3f734042e7fcb94880ce53295df4d9cab28ee4

SHA256
df0b743f90d3052932a28037147c639f3ae9bd49db71b9eec7882f99e105e962

SHA512
52d7abdab34d8dea8c2608a1afacf46514dfc0004645f95d5244f08d46b78426d22e7afb861e8c1d8f032102a53c71114cda1caa4dc87f7af83828658810518c

Download Submit
memory/1608-0-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1608-1031-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download