Analysis
-
max time kernel
140s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
29-04-2024 04:26
Static task
static1
Behavioral task
behavioral1
Sample
gK5vkTm6WAcfbiz.exe
Resource
win7-20231129-en
General
-
Target
gK5vkTm6WAcfbiz.exe
-
Size
630KB
-
MD5
55abd8961bb1559aacdd14bc4abe2948
-
SHA1
cff001eea9b43d712fbcc4cf9fb9b136f8c4109d
-
SHA256
0117ba3b90a77a00da548bf15490d6623de69e535d75fbbce8279b91c82f5ef6
-
SHA512
e5a6e38bc943c2b6fe7c157f3e719303c7b216edf3d483dd7c2b7a4267dd3d0d6b500015ef96d3c041e2032e6aabec6787bebb6f4af3f2070d9cb9fa8d2b4c2b
-
SSDEEP
12288:KjB778QTJ4oNyNN1N84trNRngS5B2/JD3CJMJjEebEPs18VT1IMajPsWj6Mr:UBlJ4tNXN84NgSUtCW1EeAaihaDsWj6Q
Malware Config
Extracted
nanocore
1.2.2.0
december2nd.ddns.net:64418
december2n.duckdns.org:64418
a73ea09a-fffa-47fc-8cf2-8699258828eb
-
activate_away_mode
false
-
backup_connection_host
december2n.duckdns.org
- backup_dns_server
-
buffer_size
65538
-
build_time
2024-02-03T01:52:12.147368736Z
-
bypass_user_account_control
false
-
bypass_user_account_control_data
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
-
clear_access_control
false
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
64418
-
default_group
NO GREE
-
enable_debug_mode
true
-
gc_threshold
1.0485772e+07
-
keep_alive_timeout
30000
-
keyboard_logging
false
-
lan_timeout
2500
-
max_packet_size
1.0485772e+07
-
mutex
a73ea09a-fffa-47fc-8cf2-8699258828eb
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
december2nd.ddns.net
- primary_dns_server
-
request_elevation
true
-
restart_delay
5000
-
run_delay
0
-
run_on_startup
false
-
set_critical_process
false
-
timeout_interval
5000
-
use_custom_dns_server
false
-
version
1.2.2.0
-
wan_timeout
8009
Signatures
-
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
gK5vkTm6WAcfbiz.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation gK5vkTm6WAcfbiz.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
gK5vkTm6WAcfbiz.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WPA Service = "C:\\Program Files (x86)\\WPA Service\\wpasvc.exe" gK5vkTm6WAcfbiz.exe -
Processes:
gK5vkTm6WAcfbiz.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA gK5vkTm6WAcfbiz.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
gK5vkTm6WAcfbiz.exedescription pid process target process PID 3708 set thread context of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe -
Drops file in Program Files directory 2 IoCs
Processes:
gK5vkTm6WAcfbiz.exedescription ioc process File created C:\Program Files (x86)\WPA Service\wpasvc.exe gK5vkTm6WAcfbiz.exe File opened for modification C:\Program Files (x86)\WPA Service\wpasvc.exe gK5vkTm6WAcfbiz.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exeschtasks.exepid process 1928 schtasks.exe 3312 schtasks.exe 452 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 14 IoCs
Processes:
gK5vkTm6WAcfbiz.exepowershell.exepowershell.exegK5vkTm6WAcfbiz.exepid process 3708 gK5vkTm6WAcfbiz.exe 3708 gK5vkTm6WAcfbiz.exe 3708 gK5vkTm6WAcfbiz.exe 3708 gK5vkTm6WAcfbiz.exe 3708 gK5vkTm6WAcfbiz.exe 3708 gK5vkTm6WAcfbiz.exe 2976 powershell.exe 3016 powershell.exe 3708 gK5vkTm6WAcfbiz.exe 3016 powershell.exe 2976 powershell.exe 4516 gK5vkTm6WAcfbiz.exe 4516 gK5vkTm6WAcfbiz.exe 4516 gK5vkTm6WAcfbiz.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
gK5vkTm6WAcfbiz.exepid process 4516 gK5vkTm6WAcfbiz.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
gK5vkTm6WAcfbiz.exepowershell.exepowershell.exegK5vkTm6WAcfbiz.exedescription pid process Token: SeDebugPrivilege 3708 gK5vkTm6WAcfbiz.exe Token: SeDebugPrivilege 2976 powershell.exe Token: SeDebugPrivilege 3016 powershell.exe Token: SeDebugPrivilege 4516 gK5vkTm6WAcfbiz.exe Token: SeDebugPrivilege 4516 gK5vkTm6WAcfbiz.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
gK5vkTm6WAcfbiz.exegK5vkTm6WAcfbiz.exedescription pid process target process PID 3708 wrote to memory of 2976 3708 gK5vkTm6WAcfbiz.exe powershell.exe PID 3708 wrote to memory of 2976 3708 gK5vkTm6WAcfbiz.exe powershell.exe PID 3708 wrote to memory of 2976 3708 gK5vkTm6WAcfbiz.exe powershell.exe PID 3708 wrote to memory of 3016 3708 gK5vkTm6WAcfbiz.exe powershell.exe PID 3708 wrote to memory of 3016 3708 gK5vkTm6WAcfbiz.exe powershell.exe PID 3708 wrote to memory of 3016 3708 gK5vkTm6WAcfbiz.exe powershell.exe PID 3708 wrote to memory of 1928 3708 gK5vkTm6WAcfbiz.exe schtasks.exe PID 3708 wrote to memory of 1928 3708 gK5vkTm6WAcfbiz.exe schtasks.exe PID 3708 wrote to memory of 1928 3708 gK5vkTm6WAcfbiz.exe schtasks.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 3708 wrote to memory of 4516 3708 gK5vkTm6WAcfbiz.exe gK5vkTm6WAcfbiz.exe PID 4516 wrote to memory of 3312 4516 gK5vkTm6WAcfbiz.exe schtasks.exe PID 4516 wrote to memory of 3312 4516 gK5vkTm6WAcfbiz.exe schtasks.exe PID 4516 wrote to memory of 3312 4516 gK5vkTm6WAcfbiz.exe schtasks.exe PID 4516 wrote to memory of 452 4516 gK5vkTm6WAcfbiz.exe schtasks.exe PID 4516 wrote to memory of 452 4516 gK5vkTm6WAcfbiz.exe schtasks.exe PID 4516 wrote to memory of 452 4516 gK5vkTm6WAcfbiz.exe schtasks.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3708 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2976 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ZYoQJBONC.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3016 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZYoQJBONC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp97EA.tmp"2⤵
- Creates scheduled task(s)
PID:1928 -
C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"2⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4516 -
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "WPA Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9C9E.tmp"3⤵
- Creates scheduled task(s)
PID:3312 -
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "WPA Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9E93.tmp"3⤵
- Creates scheduled task(s)
PID:452
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
2KB
MD5968cb9309758126772781b83adb8a28f
SHA18da30e71accf186b2ba11da1797cf67f8f78b47c
SHA25692099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
SHA5124bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
-
Filesize
18KB
MD5d9056b96ab2f59a53cb585f5526f40e8
SHA12b199b3e6b66c4ad57feeb4697228c68bec00bd9
SHA2562bf64781c458232e50e15cb7abc08ae9ebf428eb69f9f6ffb981086fe1b76473
SHA5125a084cc62171b3a214549b642f67afca916e8176b2b4756e341cbf30a552a973729f3143100fc4a950a2ede8cf721694be8dbb50224c9cced0bf7da2a2c45f97
-
Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
-
Filesize
1KB
MD59ec38e48b712924ff7cd816fdb815153
SHA17312e5fc4c74c72d5fc30c2f8e38c756bff8cc44
SHA256dbff0822c990b1865514c7c99ffd57ed387e8d5c9ad3871b92ebe8f8dbcd24d3
SHA512ad93e5b8a480080b0c2327226e5344362beca7326eada3b88e3178a53d604be5e665064bed41149532e65dd277ae41fdd39ccf1057a52eb6ffe64a6e80e297f1
-
Filesize
1KB
MD5d4561c71381b52aaedee04fb1dd48775
SHA1c8c2ff059414c1e9fd75a6f4e69067de017f5358
SHA2567a0ff9bd88d411effa13a431e003693a1a3e5b5f02d0b68a6f42db98cc214b09
SHA512c1bd2bab168965624bcb758f360f87492a4dfadb11a95b6becc98b670f43aa49adc6cb1c93e4bbf44333993d59c697fd8450dc3ce7377a4ebdad3650684b962f
-
Filesize
1KB
MD51c18d34e4c00b9a6b81126a2f10bbb74
SHA19c975e7627bdb8d7af3615684d59fa02c3b81902
SHA256ee68aecf2917fd9ddd167e6403d3149ac3dd7f346f3c9c66b6d75620b0ccd621
SHA51275a3ecebd55c8e433199122925c7c612fe3ea23a93fbca10ed83c80f11396da428581e36c42e98a0eef5210630cea040ed0da076bfcb620ddb38dee7152b816d