Analysis
- max time kernel
148s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240709-en - resource tags
- submitted
24/07/2024, 14:01
General
- Target MalwareBazaar.exe
- Size 483KB
- Sample240724-rbttrazbjn
- SHA256 df6e2c62cf6413a030efeb9ae5e6288d77c4416332fbf05f461c83fa079dda49
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
newsddawork.3utilities.com:1620
-
maxlogs.webhop.me:1620
-
1fa46b72-10f9-4da3-bc15-84dde165706d
-
activate_away_mode
true
-
backup_connection_host
maxlogs.webhop.me
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2024-02-17T03:41:10.727034736Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
1620
-
default_group
NewBin
-
enable_debug_mode
true
-
gc_threshold
1.048576e+07
-
keep_alive_timeout
30000
-
keyboard_logging
false
-
lan_timeout
2500
-
max_packet_size
1.048576e+07
-
mutex
1fa46b72-10f9-4da3-bc15-84dde165706d
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
newsddawork.3utilities.com
-
primary_dns_server
8.8.8.8
-
request_elevation
true
-
restart_delay
5000
-
run_delay
0
-
run_on_startup
false
-
set_critical_process
true
-
timeout_interval
5000
-
use_custom_dns_server
false
-
version
1.2.2.0
-
wan_timeout
8000
Signatures
- NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
- Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
- Detected Nirsoft tools 10 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
- NirSoft MailPassView 4 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 3 IoCs
Password recovery tool for various web browsers
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 4 IoCs
- Drops file in Program Files directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 6 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 11 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 3 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exeC:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe /stext "C:\Users\Admin\AppData\Local\Temp\xefixxwmkswlzautiepmb"2⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
-
-
C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exeC:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe /stext "C:\Users\Admin\AppData\Local\Temp\ahltxpgogaoqboixrpcfmhct"2⤵
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exeC:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe /stext "C:\Users\Admin\AppData\Local\Temp\kbylqirhuigdmuejbaphpuwkscbn"2⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\a.exe"C:\Users\Admin\AppData\Local\Temp\a.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"3⤵
- Adds Run key to start application
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
logs.dat
a.exe
xefixxwmkswlzautiepmb
memory/1476-69-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1476-75-0x0000000005A10000-0x0000000005A1A000-memory.dmp
memory/1476-74-0x00000000055C0000-0x00000000055DE000-memory.dmp
memory/1476-73-0x00000000055B0000-0x00000000055BA000-memory.dmp
memory/2252-23-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2252-18-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2252-17-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2252-15-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2252-7-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2252-10-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2940-41-0x0000000010000000-0x0000000010019000-memory.dmp
memory/2940-44-0x0000000010000000-0x0000000010019000-memory.dmp
memory/2940-45-0x0000000010000000-0x0000000010019000-memory.dmp
memory/3988-16-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3988-20-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3988-38-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3988-24-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3988-5-0x0000000000400000-0x0000000000478000-memory.dmp
memory/4344-59-0x0000000005B10000-0x0000000005BA2000-memory.dmp
memory/4344-66-0x0000000007110000-0x000000000711E000-memory.dmp
memory/4344-58-0x00000000060C0000-0x0000000006664000-memory.dmp
memory/4344-68-0x0000000009850000-0x00000000098EC000-memory.dmp
memory/4344-60-0x0000000005A60000-0x0000000005A6A000-memory.dmp
memory/4344-61-0x00000000060A0000-0x00000000060B2000-memory.dmp
memory/4344-65-0x0000000007100000-0x000000000710A000-memory.dmp
memory/4344-57-0x0000000000FB0000-0x0000000001052000-memory.dmp
memory/4344-67-0x0000000007130000-0x00000000071AA000-memory.dmp
memory/4868-11-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4868-19-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4868-14-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4868-25-0x0000000000430000-0x00000000004F9000-memory.dmp
memory/4868-27-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4868-13-0x0000000000400000-0x0000000000424000-memory.dmp