4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43f

Analysis

max time kernel
120s
max time network
114s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
19/09/2024, 18:29

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
Size

149KB
MD5

b8c2a6b21c174b0161ea81869ccc7a00
SHA1

853762a0162f7c076a80540d592f1862d3fe5969
SHA256

4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43f
SHA512

75cad3303f7874183792d1471671b281c52ed37f053e48feab9ced4698dc313f5250129c2f4977dfd9c6f2cc1dc0f50e9a4ac7a5fb923a77057ec9643b66de6d
SSDEEP

1536:V7Zf/FAxTWY1++PJHJXA/OsIZfzc3/Q8zxGTWn1++PJHJXA/OsIZfzc3/Q8zxu:fnyiQSoHQSoH

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4310) 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/4156-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x00090000000233fa-2.dat	upx
behavioral2/files/0x000c0000000220a6-6.dat	upx
behavioral2/memory/4156-816-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.Requests.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.DirectoryServices.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\es\WindowsFormsIntegration.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\tr\System.Windows.Forms.Primitives.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Retail-ul-phn.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\WindowsFormsIntegration.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail3-ul-phn.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Word2019VL_MAK_AE-ppd.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Excel.DataWarehouse.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessDemoR_BypassTrial365-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_OEM_Perp-ppd.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Common Files\System\ado\ja-JP\msader15.dll.mui.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.HttpListener.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Text.Encoding.Extensions.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\relaxngdatatype.md.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jre-1.8\lib\security\policy\limited\local_policy.jar.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_KMS_Client_AE-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\UIAutomationProvider.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\fre\StartMenu_Win7_RTL.wmv.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\de-DE\TipRes.dll.mui.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.ValueTuple.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Windows.Forms.Primitives.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\Accessibility.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_OEM_Perp-ppd.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.Timer.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.WebProxy.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Serialization.Primitives.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\System.Windows.Forms.Primitives.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\MSQRY32.CHM.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_OEM_Perp4-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Word2019VL_KMS_Client_AE-ppd.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-environment-l1-1-0.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019DemoR_BypassTrial180-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.ComponentModel.Primitives.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ru\WindowsFormsIntegration.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\WordR_OEM_Perp-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Modeler.UI.rll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.AppContext.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\fr\System.Windows.Controls.Ribbon.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\dynalink.md.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\libpng.md.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Paper.xml.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTrial-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentVNextR_Trial-pl.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\PresentationUI.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\UIAutomationProvider.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\javafx_iio.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jre-1.8\LICENSE.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Client\api-ms-win-core-timezone-l1-1-0.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp3-pl.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jre-1.8\lib\ext\sunjce_provider.jar.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jre-1.8\lib\javaws.jar.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_Grace-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Retail-ppd.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Net.HttpListener.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ko\WindowsBase.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\ReachFramework.resources.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Internet Explorer\SIGNUP\install.ins.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Java\jre-1.8\lib\resources.jar.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0018-0000-1000-0000000FF1CE.xml.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_OEM_Perp-ul-phn.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Retail-ul-oob.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_MAKC2R-ppd.xrm-ms.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.Contracts.dll.tmp	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.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	4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe

C:\Users\Admin\AppData\Local\Temp\4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe
"C:\Users\Admin\AppData\Local\Temp\4c20dc40e45c4899357820c20f39f0a4cf1157eb59a6be3c72dab2534c7ac43fN.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4156

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

Loading Replay Monitor...

Downloads

C:\$Recycle.Bin\S-1-5-21-523280732-2327480845-3730041215-1000\desktop.ini.tmp

Filesize
150KB

MD5
44a33bbf5c747981b3b18cfdb1d56ba5

SHA1
26215e77000857c06771739a7a09db6908058e54

SHA256
31586faed97271fb48b660abcdd08556a365242d611d08abadc9470bbd2197d9

SHA512
d5864068a5aa7ad5594fe716e028b0d10daf3da1fa47c3d354fe62dfe36648a980c4b729d5029abd4948f5d9d0c8b9c6275fa8c17634c25814645a2ab3b6b540

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

Filesize
248KB

MD5
f40da066a313a65e74fbd0eb1bde1f15

SHA1
f2c1837b25032832a6184c8fbab9bcbf4011c93a

SHA256
8f6d3a9146d3b901a2fa1bcc0767b10801672f12805183da90b304d3ba91a048

SHA512
eb15afc630ea3360680f1efdbb72525c1f96a36919530c67af43360a4de84ffc2248ebafe9808b9d3eb9946576fa73b8bec60e81b75b718039cdc7fd5b5e6d1a

Download Submit
memory/4156-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4156-816-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download