77a0c168f936727216957fa0c5b851f4e01d6ba33e59efb4e7571159296704c7

Analysis

max time kernel
120s
max time network
115s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20/08/2024, 03:45

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General

Target

efffa25246726c23beefb70e822f02a0N.exe
Size

46KB
MD5

efffa25246726c23beefb70e822f02a0
SHA1

6adcb07e4a06c0e19e0c40c085e67c78230378b8
SHA256

77a0c168f936727216957fa0c5b851f4e01d6ba33e59efb4e7571159296704c7
SHA512

72b3f001906080a75725f574a9504f7f2dab023506125dd43785643cc8b80a0d97ebb124082c0dd90b8f0e01e5248f326d0a8fc57daefea7108b12464c45d889
SSDEEP

768:V7Blpf/FAK65euBT37CPKKQSjyJJ1EXBwzEXBwdcMcI9h:V7Zf/FAxTWoJJ7TP

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4666) 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/4640-0-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x00090000000233d6-2.dat	upx
behavioral2/files/0x0004000000022922-6.dat	upx
behavioral2/memory/4640-1004-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\7-Zip\Lang\pt-br.txt.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\host\fxr\7.0.16\hostfxr.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Serialization.Json.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\server\jvm.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp4-ul-phn.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019R_Grace-ppd.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.Mail.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\es\WindowsBase.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jdk-1.8\include\win32\jni_md.h.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.Quic.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\WindowsFormsIntegration.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\System.Windows.Forms.Design.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019MSDNR_Retail-pl.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_Retail2-ul-oob.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\WidevineCdm\manifest.json.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jre-1.8\bin\JavaAccessBridge-64.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office15\pidgenx.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\C2R64.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\FPA_f14\FA000000014.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipscsy.xml.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.Primitives.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\AccessR_Retail-ul-oob.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProCO365R_SubTrial-pl.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogoSmall.scale-140.png.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-profile-l1-1-0.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\WindowsBase.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.IO.FileSystem.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Grace-ppd.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OutlookVL_MAK-ppd.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Sort\TAG.XSL.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Common Files\System\msadc\fr-FR\msadcor.dll.mui.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ru\WindowsFormsIntegration.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\it\System.Windows.Forms.Primitives.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\jstack.exe.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail-ppd.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdVL_KMS_Client-ppd.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusMSDNR_Retail-pl.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.ComponentModel.Annotations.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.WebSockets.Client.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\PresentationUI.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.nb-no.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Numerics.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\Microsoft.DiaSymReader.Native.amd64.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jre-1.8\bin\javaw.exe.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\7-Zip\Lang\af.txt.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Reflection.Emit.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.ValueTuple.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\de\System.Windows.Controls.Ribbon.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\excel-udf-host.win32.bundle.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\i640.hash.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.IO.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\System.Windows.Forms.Design.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-heap-l1-1-0.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ExcelCtxUICellModel.bin.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Resources.ResourceManager.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Linq.Queryable.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\PresentationCore.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\de\Microsoft.VisualBasic.Forms.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\jcup.md.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019DemoR_BypassTrial180-ul-oob.xrm-ms.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-multibyte-l1-1-0.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.Linq.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\UIAutomationProvider.resources.dll.tmp	efffa25246726c23beefb70e822f02a0N.exe
File created	C:\Program Files\Java\jre-1.8\lib\deploy\ffjcext.zip.tmp	efffa25246726c23beefb70e822f02a0N.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	efffa25246726c23beefb70e822f02a0N.exe

C:\Users\Admin\AppData\Local\Temp\efffa25246726c23beefb70e822f02a0N.exe
"C:\Users\Admin\AppData\Local\Temp\efffa25246726c23beefb70e822f02a0N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4640

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-1-5-21-355097885-2402257403-2971294179-1000\desktop.ini.tmp

Filesize
46KB

MD5
0247bf8dfeedec9d80fe50aff3c9d7b3

SHA1
734b9249b63eff6b18645d1f79e51bf78af12337

SHA256
3740b7e0abfca5d0324b9a7d8b37b18cf35257b8399f06f10e2dd17070a79c70

SHA512
0fd1a10ccc10e2d41dcfeea85b7ef513abb7c0234e4f08472237576b077b70551ca4eb62ba5e795b5297c86bd4ab1774cb79e9255d6219bc7d285c18231b3b43

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

Filesize
145KB

MD5
7ed6b88a160e91bb55d1a1cd896687c6

SHA1
6ce64ff678228c6e86b11f1536f9f4921b17fd29

SHA256
b8e5a65674cb1775b6c82be26c142620c77f555fa43d7acb23f52c4f635a14dd

SHA512
7e38362f5a9d0bd151a2966624d050f5a6386064e4d2d02c55087ba9b18ac8c8fe0d0a2c1e8d26e41c7c0eda6154bdb5ff6cb3a005dd942b0c13ff4c1bb2c57d

Download Submit
memory/4640-0-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4640-1004-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download