f6db5f5600fbdba1a1d1be40bbc0dc046eb6683e9138150e9ffdf103ab16725a

Analysis

max time kernel
120s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
02/08/2024, 01:54

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General

Target

37d6311a4c2eaf84539389b8ca134f40N.exe
Size

98KB
MD5

37d6311a4c2eaf84539389b8ca134f40
SHA1

ed6ed32238b29a3233acd18a84d6368ab5376b4b
SHA256

f6db5f5600fbdba1a1d1be40bbc0dc046eb6683e9138150e9ffdf103ab16725a
SHA512

9a27f3c24ebbb9d06debf946df5f48655493ef10a97a8301e4b18470ad53844d65618b2985a482e457045eb58ba1dcd5b0428e729b9f2abb4691b4ff262164fa
SSDEEP

3072:fnyiQSoJUBM+PocOQejPdMRAHAASnnD5D5172HyZU3YF40S5DnumSFDnDHaJP1Bo:KiQSo/U

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4320) 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/1508-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000900000002345f-2.dat	upx
behavioral2/files/0x0014000000022907-6.dat	upx
behavioral2/memory/1508-1786-0x0000000000400000-0x000000000040B000-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.hi-in.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\keypad.xml.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusVL_MAK-pl.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\LyncVDI_Eula.txt.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Emit.ILGeneration.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\UIAutomationProvider.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ru\PresentationCore.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses\c2rpridslicensefiles_auto.xml.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial2-ppd.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_OEM_Perp-pl.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\TellMeExcel.nrr.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Sort\TAG.XSL.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalR_Trial-ppd.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019VL_KMS_Client_AE-ul.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Common Files\System\msadc\es-ES\msdaremr.dll.mui.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\System.Drawing.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\calendars.properties.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\jfr\default.jfc.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_SubTrial-ul-oob.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription1-ul-oob.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\System.Xaml.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\UIAutomationProvider.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\es\System.Windows.Forms.Primitives.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription4-ul-oob.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\jar.exe.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jre-1.8\bin\lcms.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProVL_MAK-ul-phn.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_MAK-ppd.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\sqmapi.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-environment-l1-1-0.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\ReachFramework.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jre-1.8\bin\plugin2\vcruntime140.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jre-1.8\bin\rmid.exe.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\AccessRuntime2019R_PrepidBypass-ppd.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_EnterpriseSub_Bypass30-ppd.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\7-Zip\Lang\es.txt.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Common Files\System\msadc\en-US\msdaremr.dll.mui.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-crt-filesystem-l1-1-0.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_Retail-pl.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019MSDNR_Retail-ul-oob.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Retail-ul-phn.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Globalization.Calendars.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-pl.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp-ul-oob.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\SETLANG_F_COL.HXK.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_OEM_Perp2-ul-phn.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\System.Windows.Forms.Design.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProCO365R_Subscription-pl.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_Trial-ppd.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\Microsoft.CSharp.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Drawing.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jdk-1.8\legal\jdk\lcms.md.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-heap-l1-1-0.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\AccessR_Retail-ul-oob.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Xml.XDocument.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\Microsoft.Win32.Primitives.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_OEM_Perp-pl.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Common Files\System\ado\msadomd.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-console-l1-1-0.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Java\jre-1.8\bin\dtplugin\npdeployJava1.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_OEM_Perp-ppd.xrm-ms.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\MSOSEC.XML.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\Common Files\System\ado\msado27.tlb.tmp	37d6311a4c2eaf84539389b8ca134f40N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\UIAutomationClient.resources.dll.tmp	37d6311a4c2eaf84539389b8ca134f40N.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	37d6311a4c2eaf84539389b8ca134f40N.exe

C:\Users\Admin\AppData\Local\Temp\37d6311a4c2eaf84539389b8ca134f40N.exe
"C:\Users\Admin\AppData\Local\Temp\37d6311a4c2eaf84539389b8ca134f40N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1508

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-1-5-21-2951562807-3718269429-4208157415-1000\desktop.ini.tmp

Filesize
98KB

MD5
f2e1deacaf3fce0b97a018565cdb14a9

SHA1
ca910cf3ef3b2ed730ea2b3f179f79aa604a9bc0

SHA256
a3a65e93a68a03841cbd4742b4c0cf4b21ee525ef35ab6be18be59124fac5bbd

SHA512
b0cadabc7579096542802de5eccb9c3a4f29f73a2800ca92142f7cd514741e31a568e9f2c58e75add6b20d786a3f0094a54e0f0c44f794d9ac2c0bffaba37491

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

Filesize
197KB

MD5
ccb475de26be185868adb1f5d6d8bb42

SHA1
17ea3e694357e0fcfbd1bf5f87ac8a7c8a6280d4

SHA256
7ca4338709ce806cd9ce880936de97d1c53d860d9aab49bef52ffc580334b3f3

SHA512
8722881e2cc9749254290d5a5d60296f624b6892624f768ffbb300325c6603e71c56c03a8ed1a13ccc88eec22aae2d570700af5fa74a2f68a87b3a84bf3c94e4

Download Submit
memory/1508-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1508-1786-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download