renamer | bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7ab

Analysis

max time kernel
110s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 12:01

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General

Target

bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
Size

824KB
MD5

50d5a074897519ee758995bc4fdaeed0
SHA1

aab1c2b3cb16a244f037bc6eb2131c6997d721da
SHA256

bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7ab
SHA512

f754ad580826449c58f357c1592c2a5e9d98e322daa1436aee6d9847191ea585dbbf484c59ace417c08b5651aa36cd92afcc49194f9b29f73a849c9a5adc05dd
SSDEEP

12288:1wCBtLC+EptUpQ9SeSChq3YvxFBSSRMT8PTp4ihozEc888888888888W8888888J:ZNzCtUpQ9WWPBSSRMTEpXNu

Score

10^/10

renamer discovery worm

Malware Config

Signatures

Detects Renamer worm. 3 IoCs

Renamer aka Grename is worm written in Delphi.

resource	yara_rule
behavioral2/memory/4308-0-0x0000000000400000-0x00000000004DB000-memory.dmp	family_renamer
behavioral2/files/0x0007000000023c92-7.dat	family_renamer
behavioral2/memory/4308-270-0x0000000000400000-0x00000000004DB000-memory.dmp	family_renamer

Renamer family
renamer
Renamer, Grenam
Renamer aka Grenam is a worm written in Delphi.
worm renamer

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Paint.lnk	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe

Drops autorun.inf file 1 TTPs 2 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	F:\autorun.inf	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\autorun.inf	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\vAppSharingHookController.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-001F-0409-1000-0000000FF1CE}\vmisc.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\vcreatedump.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\RCX8585.tmp	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Internet Explorer\ja-JP\ieinstal.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javaw.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Java\jdk-1.8\bin\vjcmd.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\mip.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Google\Chrome\Application\chrome.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-000F-0000-1000-0000000FF1CE}\vaccicons.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\MSInfo\en-US\msinfo32.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\123.0.6312.123\chrome.exe.sig	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-000F-0000-1000-0000000FF1CE}\vaccicons.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\vcreatedump.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\createdump.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Java\jdk-1.8\bin\javaws.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Java\jdk-1.8\bin\vjinfo.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\Office16\vOSPPREARM.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Client\AppVDllSurrogate32.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX64\Microsoft Analysis Services\AS OLEDB\140\SQLDumper.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Windows Defender\de-DE\OfflineScannerShell.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVShNotify.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\InspectorOfficeGadget.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\OFFICE16\RCX8504.tmp	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Internet Explorer\en-US\iexplore.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\extcheck.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Windows Defender\uk-UA\OfflineScannerShell.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Mozilla Firefox\vcrashreporter.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\123.0.6312.123\vnotification_helper.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Java\jdk-1.8\bin\vextcheck.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Source Engine\vOSE.EXE	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-001F-0C0A-1000-0000000FF1CE}\misc.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Java\jdk-1.8\bin\vjavafxpackager.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\vjcmd.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\Office16\OSPPREARM.EXE	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\vAppVShNotify.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\vchrome.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Internet Explorer\fr-FR\iexplore.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\vappletviewer.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\vidlj.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\vDW20.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-006E-0409-1000-0000000FF1CE}\vmisc.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\fr-FR\ShapeCollector.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\root\Office16\CLVIEW.EXE	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Source Engine\OSE.EXE	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\vjabswitch.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javaws.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\root\Integration\Integrator.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\RCX8693.tmp	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Java\jdk-1.8\bin\javadoc.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Microsoft Office\Office16\OSPPREARM.EXE	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-001F-0C0A-1000-0000000FF1CE}\misc.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\7-Zip\v7z.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\de-DE\ShapeCollector.exe.mui	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\vchrome_pwa_launcher.ico	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jar.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-006E-0409-1000-0000000FF1CE}\RCX8736.tmp	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vuninstall.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\RCX8595.tmp	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
File created	C:\Program Files\Java\jdk-1.8\bin\java-rmi.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\bfsvc.exe	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe

C:\Users\Admin\AppData\Local\Temp\bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe
"C:\Users\Admin\AppData\Local\Temp\bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7abN.exe"
1⤵
- Drops startup file
- Drops autorun.inf file
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
PID:4308

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\7-Zip\7z.exe

Filesize
824KB

MD5
50d5a074897519ee758995bc4fdaeed0

SHA1
aab1c2b3cb16a244f037bc6eb2131c6997d721da

SHA256
bf8a8f298d83f87dd258a479bbb7bd742d20f32504c392c00d6c8255e005b7ab

SHA512
f754ad580826449c58f357c1592c2a5e9d98e322daa1436aee6d9847191ea585dbbf484c59ace417c08b5651aa36cd92afcc49194f9b29f73a849c9a5adc05dd

Download Submit
C:\Program Files\Java\jdk-1.8\bin\vjavaws.ico

Filesize
4KB

MD5
38b41d03e9dfcbbd08210c5f0b50ba71

SHA1
2fbfde75ce9fe8423d8e7720bf7408cedcb57a70

SHA256
611f2cb2e03bd8dbcb584cd0a1c48accfba072dd3fc4e6d3144e2062553637f5

SHA512
ec97556b6ff6023d9e6302ba586ef27b1b54fbf7e8ac04ff318aa4694f13ad343049210ef17b7b603963984c1340589665d67d9c65fec0f91053ff43b1401ba9

Download Submit
C:\Program Files\Microsoft Office 15\ClientX64\vIntegratedOffice.ico

Filesize
4KB

MD5
3ea9bcbc01e1a652de5a6fc291a66d1a

SHA1
aee490d53ee201879dff37503a0796c77642a792

SHA256
a058bfd185fe714927e15642004866449bce425d34292a08af56d66cf03ebe6c

SHA512
7c740132f026341770b6a20575786da581d8a31850d0d680978a00cc4dfca1e848ef9cdc32e51bae680ea13f6cc0d7324c38765cb4e26dcb2e423aced7da0501

Download Submit
C:\Program Files\Microsoft Office\root\vfs\Windows\Installer\{90160000-001F-0C0A-1000-0000000FF1CE}\vmisc.ico

Filesize
4KB

MD5
fc27f73816c9f640d800cdc1c9294751

SHA1
e6c3d8835d1de4e9606e5588e741cd1be27398f6

SHA256
3cc5043caa157e5f9b1870527b8c323850bdae1e58d6760e4e895d2ab8a35a05

SHA512
9e36b96acc97bc7cd45e67a47f1ae7ab7d3818cc2fdaad147524ce9e4baedfaac9cd012923ec65db763bfd850c65b497376bb0694508bee59747f97bf1591fd4

Download Submit
F:\autorun.inf

Filesize
102B

MD5
5513829683bff23161ca7d8595c25c72

SHA1
9961b65bbd3bac109dddd3a161fc30650e8a7096

SHA256
94e323bd9071db7369ade16f45454e7a0dbfb6a39efddc1234c4719d1f7ee4c2

SHA512
308c84446106cda0a71e37b0de46aaf4b7361f9ddcc3c4c29f8e87da8acb606525dce8a42caf9d74e708c56b31c524f9535a2f5f4757c6c357401da1c495ddb6

Download Submit
memory/4308-0-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/4308-1-0x0000000000700000-0x0000000000701000-memory.dmp

Filesize
4KB

Download
memory/4308-270-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/4308-272-0x0000000000700000-0x0000000000701000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads