3620d9bfeb416ea0e32c691aa0d07d9df4b2c04338ef3ce6f2a95e8c8c901522

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
13/09/2024, 10:02

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General

Target

b92fcbce4796e61f6be95018e2956430N.exe
Size

18KB
MD5

b92fcbce4796e61f6be95018e2956430
SHA1

5c74a700e660648c36d2753e0ffbc09b70b5efd0
SHA256

3620d9bfeb416ea0e32c691aa0d07d9df4b2c04338ef3ce6f2a95e8c8c901522
SHA512

17d2339fa912748605678c6894843e8005dc064e28f1c133af3e7c21830e25e80b485073318f44e59d8a132e5dd17f29a2f9228d03ab2bd128d36c3328cfa5e1
SSDEEP

384:QOlIBXDaU7CPKK0TIhfJJ1Evd5BvhzaMxGCFKn28XGCFKn28s:kBT37CPKKdJJ1EXBlGCeXGCes

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4665) 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/4440-0-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral2/files/0x000900000002342d-2.dat	upx
behavioral2/files/0x00040000000228de-6.dat	upx
behavioral2/memory/4440-851-0x0000000000400000-0x000000000040A000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Java\jre-1.8\legal\jdk\dynalink.md.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Tw Cen MT-Rockwell.xml.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\AUDIOSEARCHSAPIFE.DLL.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Serialization.Xml.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\ru.pak.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Common Files\System\ado\msadox.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\zh-Hant\WindowsFormsIntegration.resources.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jre-1.8\legal\javafx\libxml2.md.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial3-pl.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogoSmall.scale-180.png.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.kk-kz.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Common Files\System\ado\it-IT\msader15.dll.mui.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\chrmstp.exe.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jdk-1.8\legal\javafx\icu_web.md.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019XC2RVL_KMS_ClientC2R-ul-oob.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Grace-ppd.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_MAKC2R-ul-oob.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\1033\DSMESSAGES.XML.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Common Files\System\Ole DB\oledbjvs.inc.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ko\System.Windows.Forms.Primitives.resources.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Drawing.Primitives.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ko\System.Xaml.resources.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-interlocked-l1-1-0.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_OEM_Perp-ul-oob.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\ISO690Nmerical.XSL.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\MEDIA\WIND.WAV.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\7-Zip\Lang\af.txt.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\hostpolicy.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\UIAutomationTypes.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\plugin2\msvcp140.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Grace-ul-oob.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipsar.xml.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Private.Xml.Linq.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\MSIPC\pt-BR\msipc.dll.mui.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\deploy\messages_zh_HK.properties.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Private.Xml.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\relaxngom.md.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\excelcnv.exe.manifest.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Retail-ul-phn.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.OData.Core.NetFX35.V7.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\System.Design.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jre-1.8\bin\decora_sse.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\AccessVL_KMS_Client-ppd.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_MAK_AE-pl.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019XC2RVL_MAKC2R-ppd.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogo.scale-80.png.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Common Files\System\Ole DB\msdatl3.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\WindowsBase.resources.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\ssv.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses\c2rpridslicensefiles_auto.xml.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_MAK-ul-oob.xrm-ms.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.scale-180.png.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\7-Zip\Lang\tk.txt.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\pl\System.Windows.Input.Manipulations.resources.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\UIAutomationClientSideProviders.resources.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jre-1.8\bin\server\classes.jsa.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Serialization.Formatters.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Private.Uri.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\WindowsBase.resources.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Java\jre-1.8\bin\rmiregistry.exe.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Excel.Common.FrontEnd.XmlSerializers.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.contrast-white_scale-80.png.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-locale-l1-1-0.dll.tmp	b92fcbce4796e61f6be95018e2956430N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.ServiceModel.Web.dll.tmp	b92fcbce4796e61f6be95018e2956430N.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	b92fcbce4796e61f6be95018e2956430N.exe

C:\Users\Admin\AppData\Local\Temp\b92fcbce4796e61f6be95018e2956430N.exe
"C:\Users\Admin\AppData\Local\Temp\b92fcbce4796e61f6be95018e2956430N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4440

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-1-5-21-2718105630-359604950-2820636825-1000\desktop.ini.tmp

Filesize
18KB

MD5
d2979790a15a21abc46cdc6f43472589

SHA1
7c9ca6224a0ee461b0cfc980946862f49317eb22

SHA256
6de46ec6c476b41274e83002ca53bff937e91b4039ae6e4e32ec8b8c5e16a1a8

SHA512
3190221e35fd85f43291a8eb0d376e80178f8944a0312c99b3436770d69d918fa549de64d3321fadadd8a3537c270551d4f0109f13c261c2f05e70204f8f237b

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

Filesize
117KB

MD5
563ee78b82a187dfb066fda42271df0e

SHA1
45593464cf9cb3d18ae951bf742167ba938a14d6

SHA256
20c1c3eb94b79a2bd7b655b0e9d01e36ee9e39ffc50d965e31668259c24c65d6

SHA512
c142212f21ac2141162868ad22bfc925fa49414f9886500fbf86e434b03eb44a3bc7292a7024dc0c62ee7849321e43998c137d6ab26f982062f681c561868e96

Download Submit
memory/4440-0-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/4440-851-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download