Overview
overview
6Static
static
1avast_secu...up.exe
windows10-2004-x64
6avast_secu...up.exe
windows11-21h2-x64
6$PLUGINSDI...er.exe
windows10-2004-x64
3$PLUGINSDI...er.exe
windows11-21h2-x64
3$PLUGINSDI...up.exe
windows10-2004-x64
4$PLUGINSDI...up.exe
windows11-21h2-x64
4$PLUGINSDI...ui.dll
windows10-2004-x64
1$PLUGINSDI...ui.dll
windows11-21h2-x64
1Analysis
- max time kernel
149s - max time network
154s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
06/06/2026, 18:12
Static task
static1
Behavioral task
behavioral1
Sample
avast_secure_browser_setup.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
12 signatures
150 seconds
Behavioral task
behavioral2
Sample
avast_secure_browser_setup.exe
Resource
win11-20260513-en
windows11-21h2-x64
11 signatures
150 seconds
Behavioral task
behavioral3
Sample
$PLUGINSDIR/AvastBrowserInstaller.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
2 signatures
150 seconds
Behavioral task
behavioral4
Sample
$PLUGINSDIR/AvastBrowserInstaller.exe
Resource
win11-20260513-en
windows11-21h2-x64
2 signatures
150 seconds
Behavioral task
behavioral5
Sample
$PLUGINSDIR/AvastBrowserUpdateSetup.exe
Resource
win10v2004-20260513-en
windows10-2004-x64
2 signatures
150 seconds
Behavioral task
behavioral6
Sample
$PLUGINSDIR/AvastBrowserUpdateSetup.exe
Resource
win11-20260513-en
windows11-21h2-x64
2 signatures
150 seconds
Behavioral task
behavioral7
Sample
$PLUGINSDIR/sciterui.dll
Resource
win10v2004-20260513-en
windows10-2004-x64
0 signatures
150 seconds
Behavioral task
behavioral8
Sample
$PLUGINSDIR/sciterui.dll
Resource
win11-20260513-en
windows11-21h2-x64
0 signatures
150 seconds
General
- Target $PLUGINSDIR/AvastBrowserUpdateSetup.exe
- Size 1.6MB
- Sample260606-wtk2sabv2s
- SHA256 2425183fa25e5a6e99d38a3a2f98ad74a51da09e3f33105bf88a1f363dfe9666
- MD5 518936ad220f261fb1c4be46c9e8f5bb
- SHA1 e9d16718e8a6f9c19a461b0079dcb92cd9e6374d
- SHA512 b05df7f397baa7e1fce6deec4c4eabd0cb59382a497ca6ac2dcfe89c6dce26ecca61ae3a0b6e14af1f4e3624f14a85febbcf66c9efdd7aad565023d75bca7e90
- SSDEEP 49152:kbGrGVjIj59OfWx2YtJ+qlnZfS9u4i8Jr6:OGrGVjW2/KBn5uu4X0
- TLSH T1917523027AE18171F6BB1D35667453F31A7AFD708D30996B2394382C2AB5CD19A34B3B
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
4/10
Malware Config
Signatures
- Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_sl.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_sr.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_te.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_tr.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserUpdate.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\psmachine.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_am.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_pl.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserCrashHandler64.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_de.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_id.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_th.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_uk.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_zh-TW.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\@PaxHeader AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\acuapi_64.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_ar.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_en.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_hi.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_no.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_sw.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_mr.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_pt-PT.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserUpdateSetup.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_lt.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserUpdateBroker.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_bn.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_el.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_et.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_fi.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_hr.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_kn.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_gu.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_is.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_iw.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_ta.dll AvastBrowserUpdateSetup.exe File opened for modification C:\Program Files (x86)\GUTF59C.tmp AvastBrowserUpdateSetup.exe File opened for modification C:\Program Files (x86)\GUMF59B.tmp\@PaxHeader AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\npAvastBrowserUpdate3.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_bg.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_da.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_es-419.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_fr.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_vi.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_ja.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserUpdateHelper.msi AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_cs.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_sk.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserCrashHandler.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\psuser_64.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserUpdateCore.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_fil.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_ml.dll AvastBrowserUpdateSetup.exe File opened for modification C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserUpdateSetup.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\psmachine_64.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\psuser.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_lv.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_ur.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\AvastBrowserUpdateWebPlugin.exe AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_pt-BR.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_sv.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_zh-CN.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_ms.dll AvastBrowserUpdateSetup.exe File created C:\Program Files (x86)\GUMF59B.tmp\goopdateres_nl.dll AvastBrowserUpdateSetup.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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AvastBrowserUpdateSetup.exe
Processes
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Program Files (x86)\GUMF59B.tmp\@PaxHeader
- Size 28B
- SHA256 4b91a21461490022add83f4988fe8399ff25af2abb83a67fea3dab893e44ed43
- MD5 d3cf426e9f7c002b4b8a739658c1f244
- SHA1 c1caf67dec7a75cce1777a9d4d2bb7fc9d17d3b1
- SHA512 15c4d7570c0db903f5cc390cd0b58ff45a96a44f21e2e8f209b39db78b58b53acda974174bc411c5405018aaf89fef59488a96d18fb41506cc1900fe3131e5fb
- MD5 SHA1 SHA512
- Path C:\Program Files (x86)\GUMF59B.tmp\@PaxHeader
- Size 28B
- SHA256 731f0ef30264bbdaf2400bc0c07c463926c520e0b05c5c4fe59e17afd9226edf
- MD5 608c106cd3f34136215901b2abf758f1
- SHA1 40df33e8d182c0949df3fd06b35645a252d04d42
- SHA512 7bd6f7ce6cc052eb188612e1560785ce64e9523d68bf646956074f734db959df406341fcfd53dd7f9fc705510339df6fbf6b8068c98d4679c789a4bedff450d7
- MD5 SHA1 SHA512