Analysis
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max time kernel
148s -
max time network
148s -
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 01:56
Static task
static1
Behavioral task
behavioral1
Sample
c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe
Resource
win7-20240220-en
General
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Target
c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe
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Size
1.4MB
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MD5
7257ada04fb81f4a7cc024eca879188b
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SHA1
bb40820a78fa5ac26589e557b2d2f14fac23cf45
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SHA256
c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36
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SHA512
193c3c73b01fcc7922c92d7162c2cce09ae6170a13d7e88d69978b5ccc93fc20938895df89e56122cf516eb13ceafe1f8c40086f181321ca33dfb6f4a78a5f35
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SSDEEP
24576:6AHnh+eWsN3skA4RV1Hom2KXMmHaYDBNkmBRGEMdSR5ADIAsG/jJ45O:Nh+ZkldoPK8YaZSeIAmO
Malware Config
Extracted
nanocore
1.2.2.0
bnow.duckdns.org:4156
fc4000c4-f8ec-42dc-a0ad-1edfd7548ceb
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activate_away_mode
true
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backup_connection_host
bnow.duckdns.org
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2018-08-20T04:39:27.808758936Z
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bypass_user_account_control
false
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bypass_user_account_control_data
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clear_access_control
true
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clear_zone_identifier
false
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connect_delay
4000
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connection_port
4156
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default_group
Default
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enable_debug_mode
true
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gc_threshold
1.048576e+07
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keep_alive_timeout
30000
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keyboard_logging
false
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lan_timeout
2500
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max_packet_size
1.048576e+07
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mutex
fc4000c4-f8ec-42dc-a0ad-1edfd7548ceb
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
bnow.duckdns.org
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primary_dns_server
8.8.8.8
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request_elevation
true
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restart_delay
5000
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run_delay
0
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run_on_startup
true
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set_critical_process
true
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timeout_interval
5000
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use_custom_dns_server
false
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version
1.2.2.0
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wan_timeout
8000
Signatures
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Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exeigfxEM.exeigfxEM.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe Key value queried \REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation igfxEM.exe Key value queried \REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation igfxEM.exe -
Executes dropped EXE 2 IoCs
Processes:
igfxEM.exeigfxEM.exepid process 2732 igfxEM.exe 2628 igfxEM.exe -
Processes:
RegAsm.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA RegAsm.exe -
AutoIT Executable 1 IoCs
AutoIT scripts compiled to PE executables.
Processes:
resource yara_rule C:\Users\Admin\WinSAT\igfxEM.exe autoit_exe -
Suspicious use of SetThreadContext 3 IoCs
Processes:
c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exeigfxEM.exeigfxEM.exedescription pid process target process PID 1096 set thread context of 4044 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe RegAsm.exe PID 2732 set thread context of 2196 2732 igfxEM.exe RegAsm.exe PID 2628 set thread context of 4476 2628 igfxEM.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exeschtasks.exeschtasks.exepid process 4896 schtasks.exe 1632 schtasks.exe 3460 schtasks.exe 3076 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
RegAsm.exepid process 4044 RegAsm.exe 4044 RegAsm.exe 4044 RegAsm.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
RegAsm.exepid process 4044 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
RegAsm.exedescription pid process Token: SeDebugPrivilege 4044 RegAsm.exe -
Suspicious use of WriteProcessMemory 27 IoCs
Processes:
c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exeRegAsm.exeigfxEM.exeigfxEM.exedescription pid process target process PID 1096 wrote to memory of 4044 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe RegAsm.exe PID 1096 wrote to memory of 4044 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe RegAsm.exe PID 1096 wrote to memory of 4044 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe RegAsm.exe PID 1096 wrote to memory of 4044 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe RegAsm.exe PID 1096 wrote to memory of 4044 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe RegAsm.exe PID 4044 wrote to memory of 4896 4044 RegAsm.exe schtasks.exe PID 4044 wrote to memory of 4896 4044 RegAsm.exe schtasks.exe PID 4044 wrote to memory of 4896 4044 RegAsm.exe schtasks.exe PID 1096 wrote to memory of 1632 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe schtasks.exe PID 1096 wrote to memory of 1632 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe schtasks.exe PID 1096 wrote to memory of 1632 1096 c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe schtasks.exe PID 2732 wrote to memory of 2196 2732 igfxEM.exe RegAsm.exe PID 2732 wrote to memory of 2196 2732 igfxEM.exe RegAsm.exe PID 2732 wrote to memory of 2196 2732 igfxEM.exe RegAsm.exe PID 2732 wrote to memory of 2196 2732 igfxEM.exe RegAsm.exe PID 2732 wrote to memory of 2196 2732 igfxEM.exe RegAsm.exe PID 2732 wrote to memory of 3460 2732 igfxEM.exe schtasks.exe PID 2732 wrote to memory of 3460 2732 igfxEM.exe schtasks.exe PID 2732 wrote to memory of 3460 2732 igfxEM.exe schtasks.exe PID 2628 wrote to memory of 4476 2628 igfxEM.exe RegAsm.exe PID 2628 wrote to memory of 4476 2628 igfxEM.exe RegAsm.exe PID 2628 wrote to memory of 4476 2628 igfxEM.exe RegAsm.exe PID 2628 wrote to memory of 4476 2628 igfxEM.exe RegAsm.exe PID 2628 wrote to memory of 4476 2628 igfxEM.exe RegAsm.exe PID 2628 wrote to memory of 3076 2628 igfxEM.exe schtasks.exe PID 2628 wrote to memory of 3076 2628 igfxEM.exe schtasks.exe PID 2628 wrote to memory of 3076 2628 igfxEM.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe"C:\Users\Admin\AppData\Local\Temp\c3a4207fc483b8954711b149904c1c92e9b19648f7b00462a4e01a041d172f36.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "DSL Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4277.tmp"3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\SysWOW64\schtasks.exe" /create /tn azroles /tr "C:\Users\Admin\WinSAT\igfxEM.exe" /sc minute /mo 1 /F2⤵
- Creates scheduled task(s)
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C:\Users\Admin\WinSAT\igfxEM.exeC:\Users\Admin\WinSAT\igfxEM.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\SysWOW64\schtasks.exe" /create /tn azroles /tr "C:\Users\Admin\WinSAT\igfxEM.exe" /sc minute /mo 1 /F2⤵
- Creates scheduled task(s)
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C:\Users\Admin\WinSAT\igfxEM.exeC:\Users\Admin\WinSAT\igfxEM.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\SysWOW64\schtasks.exe" /create /tn azroles /tr "C:\Users\Admin\WinSAT\igfxEM.exe" /sc minute /mo 1 /F2⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\RegAsm.exe.logFilesize
496B
MD55b4789d01bb4d7483b71e1a35bce6a8b
SHA1de083f2131c9a763c0d1810c97a38732146cffbf
SHA256e248cef9500ed6e0c9f99d72a2a6a36955a5f0cfc0725748ef25a733cc8282f6
SHA512357e18ef30430e4b9cc4f2569b9735b1cd12f934c83162e4de78ac29ba9703b63ddb624ccc22afd5a5868f6e9d91a3c64581846abac22e9625f5b2e3d80b3ede
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C:\Users\Admin\AppData\Local\Temp\tmp4277.tmpFilesize
1KB
MD5c6f0625bf4c1cdfb699980c9243d3b22
SHA143de1fe580576935516327f17b5da0c656c72851
SHA2568dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA5129ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
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C:\Users\Admin\WinSAT\igfxEM.exeFilesize
1.4MB
MD52a09f22796068af9f846064ad8a324d1
SHA1a768619316f896a719d144ad6ab7069baf8bdc59
SHA2563a33402f4eabcb2475e86ee1041af49e9d1fd69f95ea2229d8af3726b316ddea
SHA512e104ccdec7ad6f709cfb1908b1b18bca60784bffada78efb242f18a848fa4abb071d5e9c0061a46cc65e0e9f81c971314f18236f5db234ff13f16c3d2c9fe656
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C:\Users\Admin\azroles.lnkMD5
d41d8cd98f00b204e9800998ecf8427e
SHA1da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e
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memory/1096-0-0x0000000003D00000-0x0000000003D01000-memory.dmpFilesize
4KB
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memory/2196-21-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4044-8-0x00000000020E0000-0x00000000020F0000-memory.dmpFilesize
64KB
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memory/4044-17-0x0000000073D40000-0x00000000742F1000-memory.dmpFilesize
5.7MB
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memory/4044-18-0x00000000020E0000-0x00000000020F0000-memory.dmpFilesize
64KB
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memory/4044-16-0x0000000073D40000-0x00000000742F1000-memory.dmpFilesize
5.7MB
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memory/4044-7-0x0000000073D40000-0x00000000742F1000-memory.dmpFilesize
5.7MB
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memory/4044-6-0x0000000073D40000-0x00000000742F1000-memory.dmpFilesize
5.7MB
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memory/4044-2-0x00000000001B0000-0x00000000001E8000-memory.dmpFilesize
224KB
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memory/4476-30-0x0000000000590000-0x00000000005C8000-memory.dmpFilesize
224KB