Analysis
- user interaction
yes - max time kernel
148s - max time network
131s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
11/08/2026, 22:24
General
- Target Antarctida_t9zcg5xhfn43.exe
- Size 204KB
- Sample260811-2bth4atanb
- SHA256 d9e311a1bf4bc767c5d1015cd127c9b24bc2306a1d8e4d1342c5562f200c01ea
Malware Config
Extracted
-
antarctida_stealer
-
https://api.telegram.org/bot8950639119:AAH8eNd-9sdh0rVwAlDdgCgnropD-_MnVY0/sendMessage?chat_id=8697149202
-
EWE8I7KIWJRLTHMN
-
Wifi
true
-
bot_token
8950639119:AAH8eNd-9sdh0rVwAlDdgCgnropD-_MnVY0
-
browsers
true
-
chat_id
8697149202
-
crypto
false
-
gaming
true
-
grabber
true
-
hide
false
-
hosts
true
-
mail
true
-
messengers
true
-
mutex
EWE8I7KIWJRLTHMN
-
netstat
true
-
process_dump
true
-
product_key
true
-
screenshot
true
-
sockets
false
-
sys_info
true
Signatures
- Family: AntarctidaStealer
AntarctidaStealer is an Windows stealer written in C#.
- Executes dropped EXE 1 IoCs
- Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 1 TTPs 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Browser Information Discovery 1 TTPs
Enumerate browser information.
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Delays execution with timeout.exe 1 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Antarctida_t9zcg5xhfn43.exe"C:\Users\Admin\AppData\Local\Temp\Antarctida_t9zcg5xhfn43.exe"1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "YMiWHuoXyTg1" /tr "\"C:\Users\Admin\AppData\Local\99cT0HC6RG1M\zqF3Tv7IRUPI.exe\"" /sc onlogon /rl highest /f2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\4dea6b1ed5cb4fd3b4fcaea1691c1de2.bat"2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 2 /nobreak3⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
-
-
-
C:\Users\Admin\AppData\Local\99cT0HC6RG1M\zqF3Tv7IRUPI.exe"C:\Users\Admin\AppData\Local\99cT0HC6RG1M\zqF3Tv7IRUPI.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
1Credentials in Registry
1Replay Monitor
Loading Replay Monitor...
Downloads
zqF3Tv7IRUPI.exe
4dea6b1ed5cb4fd3b4fcaea1691c1de2.bat
memory/2196-3-0x0000000004E20000-0x0000000004E2A000-memory.dmp
memory/2196-13-0x00000000060D0000-0x000000000668A000-memory.dmp
memory/2196-0-0x00000000743C2000-0x00000000743C3000-memory.dmp
memory/2196-4-0x0000000004E50000-0x0000000004E62000-memory.dmp
memory/2196-7-0x00000000056E0000-0x0000000005730000-memory.dmp
memory/2196-11-0x0000000005A70000-0x0000000005B02000-memory.dmp
memory/2196-1-0x00000000003A0000-0x00000000003D8000-memory.dmp
memory/2196-5-0x00000000743B0000-0x0000000074B6C000-memory.dmp
memory/2196-28-0x00000000743B0000-0x0000000074B6C000-memory.dmp
memory/2196-19-0x00000000743B0000-0x0000000074B6C000-memory.dmp
memory/2196-17-0x0000000006700000-0x0000000006766000-memory.dmp
memory/2196-18-0x00000000743C2000-0x00000000743C3000-memory.dmp
memory/4412-15-0x00000000743B0000-0x0000000074B6C000-memory.dmp
memory/4412-14-0x00000000743B0000-0x0000000074B6C000-memory.dmp