Analysis
- max time kernel
145s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20230221-en - resource tags
- submitted
22/02/2023, 12:35
General
- Target TNOR_CYCLE_C2_220006954787_32106010359796_E_BDA_0_E_20221211_112633·pdf.exe
- Size 308KB
- Sample230222-psby6abd32
- SHA256 472e9dd9be99ecc9a99dbed1014492ba726a6038a1e1b76621026d9b3b27fe89
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
7fxcmft-olcmjfjxdk.duckdns.org:34842
-
127.0.0.1:34842
-
31075831-d2d6-4abb-ae19-60ce57b358c9
-
activate_away_mode
true
-
backup_connection_host
127.0.0.1
- backup_dns_server
-
buffer_size
65535
-
build_time
2022-11-28T13:10:09.589620436Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
34842
-
default_group
Default
-
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
31075831-d2d6-4abb-ae19-60ce57b358c9
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
7fxcmft-olcmjfjxdk.duckdns.org
-
primary_dns_server
7fxcmft-olcmjfjxdk.duckdns.org
-
request_elevation
true
-
restart_delay
5000
-
run_delay
0
-
run_on_startup
true
-
set_critical_process
true
-
timeout_interval
5000
-
use_custom_dns_server
false
-
version
1.2.2.0
-
wan_timeout
8000
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Loads dropped DLL 2 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\TNOR_CYCLE_C2_220006954787_32106010359796_E_BDA_0_E_20221211_112633·pdf.exe"C:\Users\Admin\AppData\Local\Temp\TNOR_CYCLE_C2_220006954787_32106010359796_E_BDA_0_E_20221211_112633·pdf.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe"C:\Users\Admin\AppData\Local\Temp\TNOR_CYCLE_C2_220006954787_32106010359796_E_BDA_0_E_20221211_112633·pdf.exe"2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/3440-144-0x0000000004500000-0x0000000005B88000-memory.dmp
memory/3440-145-0x0000000004500000-0x0000000005B88000-memory.dmp
memory/4676-148-0x0000000000400000-0x000000000062B000-memory.dmp
memory/4676-146-0x0000000000C00000-0x0000000002288000-memory.dmp
memory/4676-149-0x0000000000C00000-0x0000000002288000-memory.dmp
memory/4676-164-0x0000000000400000-0x000000000062B000-memory.dmp
memory/4676-166-0x0000000000C00000-0x0000000002288000-memory.dmp
memory/4676-167-0x0000000032FB0000-0x0000000032FC0000-memory.dmp
memory/4676-169-0x0000000032FB0000-0x0000000032FC0000-memory.dmp
memory/4676-174-0x0000000032FB0000-0x0000000032FC0000-memory.dmp
memory/4676-175-0x0000000032FB0000-0x0000000032FC0000-memory.dmp