fa9bd15bd177150465da30b2933e380e0ab463f6af18fbe4db9add798b1853a0

Analysis

max time kernel
120s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
29-08-2024 13:18

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General

Target

ef4dc1f62bc7cb1667d967f5a3e08670N.exe
Size

80KB
MD5

ef4dc1f62bc7cb1667d967f5a3e08670
SHA1

3595ce68e1ec47a0ef505a029cbb92e082fda838
SHA256

fa9bd15bd177150465da30b2933e380e0ab463f6af18fbe4db9add798b1853a0
SHA512

e8c44e5afc6758f966559f2a32deaac599c8612616d27fa075bfd483b5e697ac65b8d62339e80ab135081509cb947f28bc51acc4a3342f333ba7b6e5f0fa2930
SSDEEP

1536:V7Zf/FAxTWoJJ7T1vJvHTW7JJ7T1vJv4tj:fny1sMtj

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4517) 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/4336-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x0009000000023444-2.dat	upx
behavioral2/files/0x0014000000022912-7.dat	upx
behavioral2/memory/4336-850-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\cs.pak.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial-pl.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Resources\1033\PowerPivotExcelClientAddIn.rll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.Cryptography.X509Certificates.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Threading.ThreadPool.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Transactions.Local.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\UIAutomationProvider.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\UIAutomationClientSideProviders.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\WindowsBase.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PersonalPipcR_Grace-ul-oob.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\lib\fonts\LucidaSansRegular.ttf.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_MAK_AE-ul-phn.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogo.scale-180.png.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProXC2RVL_KMS_ClientC2R-ppd.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Data.ConnectionUI.Dialog.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Text.Encoding.Extensions.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Web.HttpUtility.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ko\ReachFramework.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\bin\java.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\DataServices\+NewSQLServerConnection.odc.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogoSmall.contrast-black_scale-80.png.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\cpprestsdk.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\System.Windows.Forms.Primitives.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-stdio-l1-1-0.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\lib\fonts\LucidaBrightItalic.ttf.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_OEM_Perp-ul-oob.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Standard2019R_Trial-pl.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019VL_KMS_Client_AE-ul-oob.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\it\WindowsFormsIntegration.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\rmiregistry.exe.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Garamond.xml.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_Trial-ppd.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Common Files\System\Ole DB\es-ES\msdasqlr.dll.mui.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Reflection.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial2-ul-oob.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_SubTrial-pl.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProCO365R_Subscription-ppd.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Trial-ppd.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Common Files\microsoft shared\VSTO\10.0\VSTOMessageProvider.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\javadoc.exe.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\bin\awt.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Facet.thmx.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_MAK-ppd.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_O16ConsumerPerp_Bypass30-ul-oob.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.reportviewer.winforms.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART4.BDR.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\de-DE\TipTsf.dll.mui.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\PresentationFramework.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\PresentationUI.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-convert-l1-1-0.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\fr\System.Xaml.resources.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial4-pl.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\offsymxl.ttf.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-process-l1-1-0.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Trial-ul-oob.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdO365R_SubTrial-pl.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.AppContext.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationFramework.Royale.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\dynalink.md.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessPipcR_Grace-ul-oob.xrm-ms.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-interlocked-l1-1-0.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\hostpolicy.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\bin\zip.dll.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.exe
File created	C:\Program Files\Java\jre-1.8\lib\javaws.jar.tmp	ef4dc1f62bc7cb1667d967f5a3e08670N.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	ef4dc1f62bc7cb1667d967f5a3e08670N.exe

C:\Users\Admin\AppData\Local\Temp\ef4dc1f62bc7cb1667d967f5a3e08670N.exe
"C:\Users\Admin\AppData\Local\Temp\ef4dc1f62bc7cb1667d967f5a3e08670N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4336

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-1-5-21-786284298-625481688-3210388970-1000\desktop.ini.tmp

Filesize
80KB

MD5
96688b8a406f1e98a2647f441ea4bad0

SHA1
bea294f621a9bccb4fd01ac651f6ae747326dde3

SHA256
57a477db8b73df1fbc88d319ea08465c645b16ef328c4d07b0d49278d0f49641

SHA512
622ad417703424fc772292cd472eb7908723bd695dd68e37564621c6290058196e3adcf595aae0d61a03d7c222f4fa3e687acadeaf730f0f04ddaaebc09174dc

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

Filesize
179KB

MD5
db7129cca57e5f285ad5581c4364f8c2

SHA1
56ce6cb9ef43c120ffe2e4b177f5b4402af83dc2

SHA256
f01190a2ea0094197d9facfc03723145494ff2e7497bbb6534380918e5f2c60a

SHA512
c01324dc1d946e656ce6564ced25c09d09940fe2658207a9473d678072f7f8559aca46baed9d7751f4ff447064633a516753d3d58ba2a5c0048197e7f604f93f

Download Submit
memory/4336-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4336-850-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download