e5fa0a53d33cd690fccbdedee36a22e4dab76389334381f9896de14f98157bbc

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
09/09/2024, 01:16

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General

Target

31d765250a0db06b51e7c09cc6532000N.exe
Size

99KB
MD5

31d765250a0db06b51e7c09cc6532000
SHA1

2dd31f1eef095a2768f32631528b67204c3c08ee
SHA256

e5fa0a53d33cd690fccbdedee36a22e4dab76389334381f9896de14f98157bbc
SHA512

487e297f304c246afa1129bd1a0ef9724bdc2d8533a2824651d69918411d262113e822ab34cdc7b0e90e2dbb172e8b175007a57ab9b45f381aa6e2be05e68c64
SSDEEP

1536:V7Zf/FAxTWoJJTU3UytJfOL7bTW7JJTU3UytJfOL7t:fny1yb

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4305) 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/752-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000900000002342d-2.dat	upx
behavioral2/files/0x00040000000228f4-6.dat	upx
behavioral2/memory/752-794-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ru-ru.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ko\Microsoft.VisualBasic.Forms.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\bcel.md.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp3-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\7-Zip\Lang\ug.txt.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.IO.UnmanagedMemoryStream.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Grace-ul-oob.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\VISUALIZATIONCOMMON.DLL.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.Cryptography.Cng.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\security\java.security.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jre-1.8\bin\nio.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Trial-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Runtime.Handles.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-time-l1-1-0.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\WordR_Grace-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaTypewriterRegular.ttf.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\zh-TW\tipresx.dll.mui.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationCore.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\PresentationCore.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\Microsoft.VisualBasic.Forms.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessVL_MAK-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-environment-l1-1-0.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Common Files\microsoft shared\VSTO\10.0\VSTOInstaller.exe.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Globalization.Calendars.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Tw Cen MT-Rockwell.xml.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_MAK_AE-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019VL_MAK_AE-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProXC2RVL_MAKC2R-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Document.XmlSerializers.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\mr.pak.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Office 2007 - 2010.xml.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription2-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp3-ul-oob.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\AugLoop\third-party-notices.txt.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Author2XML.XSL.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Calibri-Cambria.xml.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentVNextR_Grace-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\UIAutomationClient.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\UIAutomationClient.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\pl\PresentationUI.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jre-1.8\legal\javafx\jpeg_fx.md.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\en-US\TipTsf.dll.mui.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Crashpad\metadata.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdO365R_SubTest-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp4-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019XC2RVL_KMS_ClientC2R-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_MAKC2R-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.Compression.ZipFile.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jre-1.8\bin\bci.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Access2019VL_MAK_AE-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp2-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoVL_KMS_Client-ul.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\WINWORD_K_COL.HXK.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\MICROSOFT.DATA.RECOMMENDATION.CLIENT.CORE.DLL.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\uk.pak.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\serialver.exe.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Java\jre-1.8\legal\javafx\libffi.md.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\AccessR_Retail-pl.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\System.Windows.Forms.Design.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Common Files\System\Ole DB\msdatl3.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.Cryptography.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\WindowsBase.resources.dll.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessDemoR_BypassTrial365-ppd.xrm-ms.tmp	31d765250a0db06b51e7c09cc6532000N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\WacLangPackEula.txt.tmp	31d765250a0db06b51e7c09cc6532000N.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	31d765250a0db06b51e7c09cc6532000N.exe

C:\Users\Admin\AppData\Local\Temp\31d765250a0db06b51e7c09cc6532000N.exe
"C:\Users\Admin\AppData\Local\Temp\31d765250a0db06b51e7c09cc6532000N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:752

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-1-5-21-2392887640-1187051047-2909758433-1000\desktop.ini.tmp

Filesize
99KB

MD5
cd2a7a25cbc3d47dccc36ee66a2ee3f8

SHA1
5ff64fe23de98d74b068d2a514c3c69bde96b30e

SHA256
b0393b613515f8d64bdec70f0734aeb36d8f3b1c120af50414f9548889bcffb3

SHA512
eb91af0cd07b3bea65c37a5f43a683f5fb9f599a3483111f0c7f74c3ab52c14553cbec02c9cacce594b60e2d09512edc530c1794423ffe8279c91a2ca54cf0ab

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

Filesize
198KB

MD5
44c9983f22c882f19d498623829cb996

SHA1
5a93c4d6717e31772d90bd0a27fde22d60105ea9

SHA256
556467e835609b6974382ebbae23e8858fdbb5ab72eeedbd8b107ea6d3f0eae5

SHA512
7ffe87cf7b7c1467a346b5740e4c653cdedc13b03c1b196cfd49388b5400ecf692fe795df8551436e88529afa0a9c07c4d7d7815038bde046055fa9ad7cf0acc

Download Submit
memory/752-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/752-794-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download