321a3d99805bad39358f205b6a6384a67ee775be5a4d4c6b601faea89a83a86e

Analysis

max time kernel
120s
max time network
100s
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, 10:00

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General

Target

ef33cca6c657b0841236c1cf3157c8f0N.exe
Size

54KB
MD5

ef33cca6c657b0841236c1cf3157c8f0
SHA1

17ef73bf2e2df47a7dd6fa990e8de74565744a00
SHA256

321a3d99805bad39358f205b6a6384a67ee775be5a4d4c6b601faea89a83a86e
SHA512

cde97df4550e0515cfa2a30ac541a1ac4baeddf2680f168fa7407e3b8bee00983153eae684e58e893a2713e5e0356f0daa5d0bc895c8a46af836ce95b73d255d
SSDEEP

768:V7Blpf/FAK65euBT37CPKKQSjyJJ1EXBwzEXBwdcMcI9bJSsJSCQZbQZw:V7Zf/FAxTWoJJ7TFJSsJSBcw

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4670) 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/2616-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x0009000000023490-2.dat	upx
behavioral2/files/0x0004000000022933-6.dat	upx
behavioral2/memory/2616-928-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\microsoft shared\ink\ja-JP\rtscom.dll.mui.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Xaml.resources.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ja\UIAutomationClient.resources.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\unpack.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\MLASeventhEditionOfficeOnline.xsl.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PresentationFramework.Classic.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\UIAutomationClientSideProviders.resources.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_OEM_Perp-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_Subscription-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019VL_MAK_AE-pl.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-timezone-l1-1-0.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_OEM_Perp-ul-phn.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LivePersonaCard\TPN.txt.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Linq.Expressions.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_OEM_Perp-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Grace-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_PrepidBypass-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019XC2RVL_KMS_ClientC2R-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019XC2RVL_MAKC2R-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\WordR_Trial-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.SecureString.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ko\UIAutomationTypes.resources.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\zh-Hant\WindowsBase.resources.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProVL_KMS_Client-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdCO365R_SubTest-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Principal.Windows.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Microsoft.WindowsDesktop.App.deps.json.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Internet Explorer\es-ES\iexplore.exe.mui.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\logging.properties.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jre-1.8\bin\dtplugin\npdeployJava1.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\offsym.ttf.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\MEDIA\SUCTION.WAV.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\micaut.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\UIAutomationClient.resources.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-file-l2-1-0.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ExcelVL_KMS_Client-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_SubTest-pl.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_KMS_Client_AE-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\TellMePowerPoint.nrr.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\Microsoft.Win32.Primitives.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Text.RegularExpressions.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Transactions.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\mscordaccore_amd64_amd64_8.0.224.6711.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\msvcp140.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Grace-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_Retail-ul-phn.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Retail-ul-phn.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\7-Zip\Lang\de.txt.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-runtime-l1-1-0.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.ComponentModel.TypeConverter.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Client\api-ms-win-core-file-l1-2-0.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Blue.xml.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteVL_MAK-ppd.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\schemagen.exe.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\zlib.md.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Java\jre-1.8\lib\security\blacklisted.certs.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial-pl.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OutlookVL_MAK-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Grace-ul-oob.xrm-ms.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogo.contrast-black_scale-180.png.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogoSmall.contrast-black_scale-80.png.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Net.Security.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\UIAutomationTypes.dll.tmp	ef33cca6c657b0841236c1cf3157c8f0N.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	ef33cca6c657b0841236c1cf3157c8f0N.exe

C:\Users\Admin\AppData\Local\Temp\ef33cca6c657b0841236c1cf3157c8f0N.exe
"C:\Users\Admin\AppData\Local\Temp\ef33cca6c657b0841236c1cf3157c8f0N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2616

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-1-5-21-1194130065-3471212556-1656947724-1000\desktop.ini.tmp

Filesize
55KB

MD5
d9fca995c9b724f0fbd41422b84ffacf

SHA1
0ef15f814b620328092e9b5c35ff7f614e49e78b

SHA256
0bcbd52600938b75bed570a21f469f2e0fab281bd56fab9d0987fcced3aa9617

SHA512
d4601899fb7249cf2341dea8fa1f8dc0ea4e28d43e622073f6cc16299693c6a9a3922a6a1899f3f83a6a928009dd8255037780180c7f53dd9aba248dbabd8a03

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

Filesize
153KB

MD5
9ec6f804837768591be7ca66c577f7c2

SHA1
4a56a2249d9ab24b05410c26e46a5323e62bfe63

SHA256
10268c058415e57b960cf4bb6f81529651618965cc76b0511330c99e5c387533

SHA512
cdcb700740d1e4f1bec3658e2ac160fef51e1871800042a05cab511b16a6955a750c857658071570486636fac5e0d677f741d2b0142416dbae6c25f3f2c2e64e

Download Submit
memory/2616-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2616-928-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download