99bc46aa88d4ca8aa6e09cfac1117660d48c002e970957b81bf4a9a6aa068121

Analysis

max time kernel
120s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/09/2024, 05:32

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General

Target

a37cbe8e0f11353501983b6c57216f50N.exe
Size

131KB
MD5

a37cbe8e0f11353501983b6c57216f50
SHA1

192a91b2cdb2b4e731d4bbf7e765406a5624ed13
SHA256

99bc46aa88d4ca8aa6e09cfac1117660d48c002e970957b81bf4a9a6aa068121
SHA512

5ad7c79dc8d972dec9ee56808ea1e1be5ea3669a4ee98699cc2c50106c0a0c65cb68cfd6fbac398b27b6019927f07d1a27463ceea80bd2e73dad445b269a8407
SSDEEP

1536:V7Zf/FAxTWoJJZENTNyavf73tQqarjrATW7JJZENTNyavf73tQqarjry:fny1tEvfjqqmtEvfjqqH

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/4264-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x0009000000023490-2.dat	upx
behavioral2/files/0x000f000000022902-6.dat	upx
behavioral2/memory/4264-778-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Threading.Thread.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\PresentationUI.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Standard2019VL_MAK_AE-ul-oob.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-processenvironment-l1-1-0.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-processthreads-l1-1-1.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\System.Windows.Forms.Primitives.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Windows.Forms.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Design.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\pt-BR\System.Windows.Forms.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jdk-1.8\include\win32\bridge\AccessBridgeCalls.c.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-datetime-l1-1-0.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pidgenx.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019VL_MAK_AE-pl.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\msvcr120.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Internet Explorer\ieinstal.exe.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessDemoR_BypassTrial365-ul-oob.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Layout.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\auxpad\auxbase.xml.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.DirectoryServices.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\UIAutomationProvider.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\cs\ReachFramework.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Internet Explorer\fr-FR\iexplore.exe.mui.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jre-1.8\lib\deploy\[email protected]	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\PresentationFramework.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\WINWORD_COL.HXC.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Data.SapClient.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Common Files\System\msadc\msdfmap.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\EventSource.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\es\Microsoft.VisualBasic.Forms.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentVNextR_Retail-ppd.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProO365R_Subscription-pl.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Security.Cryptography.Xml.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jre-1.8\lib\cmm\sRGB.pf.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Retail-ppd.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_OEM_Perp-ppd.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.Reporting.AdHoc.Shell.Bootstrapper.xap.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\tr\UIAutomationClient.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\jfr.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Orange.xml.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Retail-ppd.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Office.PowerPivot.ExcelAddIn.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-locale-l1-1-0.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTrial-ppd.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\WordR_Trial-ppd.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\GRAPH_COL.HXC.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Numerics.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.IO.MemoryMappedFiles.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ru\UIAutomationClientSideProviders.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019XC2RVL_MAKC2R-ul-phn.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_Retail-ppd.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART12.BDR.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipsplk.xml.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Windows.Forms.Design.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\jcup.md.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_OEM_Perp-ul-phn.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Trial-ul-oob.xrm-ms.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\7-Zip\Lang\af.txt.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-console-l1-1-0.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-timezone-l1-1-0.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\java-rmi.exe.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0115-0409-1000-0000000FF1CE.xml.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\Common Files\System\msadc\it-IT\msadcer.dll.mui.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Diagnostics.Tools.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\UIAutomationProvider.resources.dll.tmp	a37cbe8e0f11353501983b6c57216f50N.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	a37cbe8e0f11353501983b6c57216f50N.exe

C:\Users\Admin\AppData\Local\Temp\a37cbe8e0f11353501983b6c57216f50N.exe
"C:\Users\Admin\AppData\Local\Temp\a37cbe8e0f11353501983b6c57216f50N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4264

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-1-5-21-945322488-2060912225-3527527000-1000\desktop.ini.tmp

Filesize
131KB

MD5
7e57a27f40201bce0ce2b666a143e928

SHA1
54ba72fb6dd985be37a3c0ad11fcd5b7336cf6ee

SHA256
0f7d4fccd86fb3554e3f240f6f63d22191f2c1e937af76924014916aeec7f97a

SHA512
9f8cf986183669c6d3a59e9f54a743ea42c74941a9b3395d822e6ad256c22518894676ebc19166718327787b56d59cf25153981deb61396c18158e5586d1b9ed

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

Filesize
230KB

MD5
7b0fa9502649659634c44d85fa6f4438

SHA1
caffa9f54babafce940daf4e67288f188abf6b45

SHA256
e20c8c41bb8922b52f96f64751cb3e6d9a33232fbc5cadd0738f8b0737bbea64

SHA512
607c365b12d66982904c547df5c41dc51940a4eec75783a34b92e1570b065025754f70c1958c73a06a870347d22ce5ea814445be0bc295b64d957a6ee6bee3ed

Download Submit
memory/4264-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4264-778-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download