a4f855f491ef8dae7147480879a32c6f1721a640ba195b3ffb2e57f1e46f3a43

Analysis

max time kernel
120s
max time network
101s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05/09/2024, 13:39

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General

Target

b43e3c319c74c536c594a933fe2dd080N.exe
Size

200KB
MD5

b43e3c319c74c536c594a933fe2dd080
SHA1

48ad572afb80665e727af47db444aa30b8c49f0f
SHA256

a4f855f491ef8dae7147480879a32c6f1721a640ba195b3ffb2e57f1e46f3a43
SHA512

005eac52dea1d838b899326966a7a2177494b952f83c3c7abb85970b728e96c9177339cb147df897571c8bf154a0bc5fc322ad9f52ddac99fe43c7abaf6e9f4a
SSDEEP

3072:fny1di4eLz1ipxjMKm0KUFncmdi4eLz1ipxjMKm0KUFncX:Km4elYxLKUFU4elYxLKUFW

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (3974) 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/4848-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x00090000000233ee-2.dat	upx
behavioral2/files/0x00040000000228de-6.dat	upx
behavioral2/memory/4848-756-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\microsoft shared\ink\de-DE\InkObj.dll.mui.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Configuration.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\System.DirectoryServices.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\UIAutomationClientSideProviders.resources.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\UIAutomationTypes.resources.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\javah.exe.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Retail-ul-phn.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_KMS_ClientC2R-ul.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-private-l1-1-0.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusE5R_SubTrial-pl.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019R_Trial-ppd.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019VL_MAK_AE-pl.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.NameResolution.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\UIAutomationTypes.resources.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\System.Windows.Controls.Ribbon.resources.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\ecc.md.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OutlookR_Retail-pl.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ko-KR\tipresx.dll.mui.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\cs\System.Windows.Controls.Ribbon.resources.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\colorimaging.md.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoVL_KMS_Client-ul.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\7-Zip\Lang\bg.txt.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\mip.exe.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Common Files\System\msadc\fr-FR\msdaprsr.dll.mui.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Configuration.ConfigurationManager.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Reflection.DispatchProxy.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jdk-1.8\legal\jdk\santuario.md.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentDemoR_BypassTrial180-ul-oob.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_Subscription-ppd.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription2-ul-oob.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-rtlsupport-l1-1-0.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\santuario.md.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdVL_MAK-pl.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\mscordaccore_amd64_amd64_7.0.1624.6629.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jdk-1.8\legal\jdk\jpeg.md.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Grace-ul-oob.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Numerics.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\el.pak.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_KMS_Client_AE-ul.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_MAK_AE-ppd.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Grace-ppd.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Xml.ReaderWriter.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\PresentationCore.resources.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Google\Chrome\Application\initial_preferences.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoVL_MAK-ppd.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pidgenx.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Diagnostics.FileVersionInfo.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\ReachFramework.resources.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Grace-ul-oob.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusE5R_SubTrial-ul-oob.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_KMS_Client-ul.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\PresentationFramework-SystemDrawing.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\vcruntime140_1.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Java\jre-1.8\lib\fonts\LucidaBrightDemiBold.ttf.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-string-l1-1-0.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019DemoR_BypassTrial180-ppd.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.IO.FileSystem.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPointVL_MAK-ul-phn.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_Subscription-pl.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.Expressions.dll.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0115-0409-1000-0000000FF1CE.xml.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Trial-ul-oob.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Retail-ul-phn.xrm-ms.tmp	b43e3c319c74c536c594a933fe2dd080N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\base.xml.tmp	b43e3c319c74c536c594a933fe2dd080N.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	b43e3c319c74c536c594a933fe2dd080N.exe

C:\Users\Admin\AppData\Local\Temp\b43e3c319c74c536c594a933fe2dd080N.exe
"C:\Users\Admin\AppData\Local\Temp\b43e3c319c74c536c594a933fe2dd080N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4848

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
201KB

MD5
ab51db65c0fb1a9860d67e7eda28c90d

SHA1
751515fe48ca8943b4699a125374d0f200863e06

SHA256
bd94d1737284d2370597e585d0f3cdb3c7ff222d92d9b39dcbb5bb3f94c7c592

SHA512
97e2bb6714d87691b51c64d004e13cff9b00f13ba5ae191877b79f2cfcfc2789f2351761543eb797125f4e9135e71c86f840c624f1c2c69f903c5868837e5c09

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

Filesize
299KB

MD5
ca4eca0ba5b8cefda1a292b59c759feb

SHA1
fe8166707f7933d30ee37b0a706948c8e66d4914

SHA256
62b476c13f99bff91236b19cde40ec525911c527d78205aecaab6f435109fa99

SHA512
26d2ba18a7a2f7932f470f92a4f2c72744cc7b36ca2b6ee491c5c190f3fdcc5e8fb11a2259b0fd7acec1a28f46a2b2c3e45ec1661d62dcbd27bf6b92fc735e5d

Download Submit
memory/4848-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4848-756-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download