Overview
overview
8Static
static
3avast_secu...up.exe
windows10-2004-x64
8avast_secu...up.exe
windows11-ltsc_2024-x64
7$PLUGINSDI...er.exe
windows10-2004-x64
3$PLUGINSDI...er.exe
windows11-ltsc_2024-x64
3$PLUGINSDI...up.exe
windows10-2004-x64
4$PLUGINSDI...up.exe
windows11-ltsc_2024-x64
4$PLUGINSDI...ui.dll
windows10-2004-x64
1$PLUGINSDI...ui.dll
windows11-ltsc_2024-x64
1General
- Target avast_secure_browser_setup.exe
- Size 6.8MB
- Sample260808-ymrl4axzaz
- SHA256 798e3802db8a96ec665a3edfdb3a4f14db6db6b5a168685cc16a7230d37e7739
- MD5 c2ddf5d1219d1b396992eae1a7d4c4be
- SHA1 7ec8ed03b7d086cd552a4ec08f47e0ce3750eb4e
- SHA512 380d7c7c3bedd41a2c72e4be0ef78cead3547a5b45e33f531b5a7c7eb3aac01cda2e7ada2fcdce468751b1f70ef291c15714a5767c4ea32e33c4b9b70efef12a
- SSDEEP 196608:Mt86rk+KjsHqnfKrxEk2+XdR/MnPQtFRkCa:arkZjUrb2+XdRuazkCa
- TLSH T16D7633893F21C516E7FFA838265C3BD35634AC24AE71B1811398393C62B3DFD45166AB
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
avast_secure_browser_setup.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
avast_secure_browser_setup.exe
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral3
Sample
$PLUGINSDIR/AvastBrowserInstaller.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral4
Sample
$PLUGINSDIR/AvastBrowserInstaller.exe
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral5
Sample
$PLUGINSDIR/AvastBrowserUpdateSetup.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral6
Sample
$PLUGINSDIR/AvastBrowserUpdateSetup.exe
Resource
win11ltsc2024-20260709-en
Behavioral task
behavioral7
Sample
$PLUGINSDIR/sciterui.dll
Resource
win10v2004-20260513-en
Behavioral task
behavioral8
Sample
$PLUGINSDIR/sciterui.dll
Resource
win11ltsc2024-20260709-en
Malware Config
Targets
-
- Target avast_secure_browser_setup.exe
- Size 6.8MB
- SHA256 798e3802db8a96ec665a3edfdb3a4f14db6db6b5a168685cc16a7230d37e7739
- MD5 c2ddf5d1219d1b396992eae1a7d4c4be
- SHA1 7ec8ed03b7d086cd552a4ec08f47e0ce3750eb4e
- SHA512 380d7c7c3bedd41a2c72e4be0ef78cead3547a5b45e33f531b5a7c7eb3aac01cda2e7ada2fcdce468751b1f70ef291c15714a5767c4ea32e33c4b9b70efef12a
- SSDEEP 196608:Mt86rk+KjsHqnfKrxEk2+XdR/MnPQtFRkCa:arkZjUrb2+XdRuazkCa
- TLSH T16D7633893F21C516E7FFA838265C3BD35634AC24AE71B1811398393C62B3DFD45166AB
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
-
Downloads MZ/PE file
-
Event Triggered Execution: Image File Execution Options Injection
-
Uses Session Manager for persistence
Creates Session Manager registry key to run executable early in system boot.
-
Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
-
Executes dropped EXE
-
Loads dropped DLL
-
Adds Run key to start application
-
Checks for any installed AV software in registry
-
Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
-
Checks whether UAC is enabled
-
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
-
Drops file in System32 directory
-
- Target $PLUGINSDIR/AvastBrowserInstaller.exe
- Size 11.1MB
- SHA256 5638bd9add1dc2665e09890352d721fd983c2b280f16d2f95ae9b7a57395cc31
- MD5 18d2a47d07d74fee3b5171b4c89d1cfb
- SHA1 4bfcbaf117c6c8b2fd548e8ecbe4cb6a0721d519
- SHA512 a5515979f5f89b76c975a429761eb5782357a6c93b81bf9fc7b2a0e72166a5854e0a6caaccd996378eabf18e8a7f3aa678cb0fc548c44fdeec66084e5280c92b
- SSDEEP 196608:djznGwZMb2U/KMgTHNcfVNurYTtajHpEgwC8rM+BWKLNoGfK11oEqSG6klkfsMWG:owZMbu6+yWKLjKzG60rqNp+
- TLSH T19CC6BF33BA81C079C69203B0594CF79997FEFAB11F32419BA798275D6F384D1A721A43
- MD5 SHA1 SHA512 SSDEEP TLSH
Score3/10 -
- Target $PLUGINSDIR/AvastBrowserUpdateSetup.exe
- Size 1.6MB
- SHA256 2425183fa25e5a6e99d38a3a2f98ad74a51da09e3f33105bf88a1f363dfe9666
- MD5 518936ad220f261fb1c4be46c9e8f5bb
- SHA1 e9d16718e8a6f9c19a461b0079dcb92cd9e6374d
- SHA512 b05df7f397baa7e1fce6deec4c4eabd0cb59382a497ca6ac2dcfe89c6dce26ecca61ae3a0b6e14af1f4e3624f14a85febbcf66c9efdd7aad565023d75bca7e90
- SSDEEP 49152:kbGrGVjIj59OfWx2YtJ+qlnZfS9u4i8Jr6:OGrGVjW2/KBn5uu4X0
- TLSH T1917523027AE18171F6BB1D35667453F31A7AFD708D30996B2394382C2AB5CD19A34B3B
- MD5 SHA1 SHA512 SSDEEP TLSH
Score4/10 -
- Target $PLUGINSDIR/sciterui.dll
- Size 147KB
- SHA256 923f9bca72d8b13beabea40b4d733088d5cad1047b4ac4b2699fa1e8b1379e41
- MD5 ce343f3452cc463ecac9d4b86416b2c7
- SHA1 824c5d5fbeeb0cc71d3caedfa2d5f23922c9093f
- SHA512 79a52b18ef92fa94f2305b02049abda91ba86fd5ab8eb817041075fdc7c95a0fde79d69831201b326a76e09f33b5c4dfff089cc75e53daae2ad620eedd60eeab
- SSDEEP 3072:4DKviR92IK3cV8z51WCqMzqGpksYaxNKvR0QzYFRGQ1yS21ZCVV:4GviRK37z51jLzqYBYDvZYFRGQ0XoVV
- TLSH T16DE312CF7E1473A6FD9A4E711090477168C7F3F8BBB695A218948264A66234CE90D0FF
- MD5 SHA1 SHA512 SSDEEP TLSH
Score1/10
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
3Active Setup
1Registry Run Keys / Startup Folder
2Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
3Active Setup
1Registry Run Keys / Startup Folder
2Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Modify Registry
5Pre-OS Boot
1Bootkit
1Subvert Trust Controls
1Install Root Certificate
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Discovery
Browser Information Discovery
1Peripheral Device Discovery
1Query Registry
7Software Discovery
1Security Software Discovery
1System Information Discovery
7System Location Discovery
1System Language Discovery
1System Network Configuration Discovery
1Internet Connection Discovery
1System Time Discovery
1