Analysis
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max time kernel
147s -
max time network
146s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
03-02-2023 19:33
Static task
static1
Behavioral task
behavioral1
Sample
Loader.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
Loader.exe
Resource
win10v2004-20220812-en
General
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Target
Loader.exe
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Size
1.6MB
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MD5
a44e526804469076d712e8a05ddd7759
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SHA1
7010fda540e70139020a7a79730e74e99bd8e6c9
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SHA256
46d7128963bde013c8ec359b285e47eabbf9c88e332735e02ced518773e8e95f
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SHA512
04c40ef00c80d641c4f7bced8aefc180d695ea23ef79e272167f1a567484be2ab7031ca55a246cbeba1ed0c0ed93223fc2a33daed7f2048c62f169f0e6325b36
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SSDEEP
49152:fBvdZG5o8InNXL9Qn0HpZjI64n2hcyfT2:pFZG5oNnRfh9
Malware Config
Signatures
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Detect PureCrypter injector 1 IoCs
Processes:
resource yara_rule behavioral1/memory/980-55-0x000000001BE30000-0x000000001C108000-memory.dmp family_purecrypter -
Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
Loader.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\Google\\Chrome.exe\"," Loader.exe -
PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 11 IoCs
Processes:
powershell.exeLoader.exepid process 1492 powershell.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe 980 Loader.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
powershell.exeLoader.exedescription pid process Token: SeDebugPrivilege 1492 powershell.exe Token: SeDebugPrivilege 980 Loader.exe -
Suspicious use of WriteProcessMemory 33 IoCs
Processes:
Loader.exedescription pid process target process PID 980 wrote to memory of 1492 980 Loader.exe powershell.exe PID 980 wrote to memory of 1492 980 Loader.exe powershell.exe PID 980 wrote to memory of 1492 980 Loader.exe powershell.exe PID 980 wrote to memory of 868 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 868 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 868 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1548 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1548 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1548 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1624 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1624 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1624 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1680 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1680 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1680 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1628 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1628 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1628 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 988 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 988 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 988 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1220 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1220 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1220 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 812 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 812 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 812 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 456 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 456 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 456 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1668 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1668 980 Loader.exe MSBuild.exe PID 980 wrote to memory of 1668 980 Loader.exe MSBuild.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Loader.exe"C:\Users\Admin\AppData\Local\Temp\Loader.exe"1⤵
- Modifies WinLogon for persistence
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:980 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwAyAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1492 -
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:868
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1548
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1624
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1680
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1628
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:988
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1220
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:812
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:456
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1668
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/980-54-0x0000000000950000-0x0000000000AF2000-memory.dmpFilesize
1.6MB
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memory/980-55-0x000000001BE30000-0x000000001C108000-memory.dmpFilesize
2.8MB
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memory/980-67-0x000000001BDB7000-0x000000001BDD6000-memory.dmpFilesize
124KB
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memory/980-66-0x000000001C170000-0x000000001C22C000-memory.dmpFilesize
752KB
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memory/980-58-0x000000001BDB7000-0x000000001BDD6000-memory.dmpFilesize
124KB
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memory/1492-60-0x000007FEEAE60000-0x000007FEEB9BD000-memory.dmpFilesize
11.4MB
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memory/1492-59-0x000007FEEB9C0000-0x000007FEEC3E3000-memory.dmpFilesize
10.1MB
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memory/1492-61-0x0000000002864000-0x0000000002867000-memory.dmpFilesize
12KB
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memory/1492-62-0x000000001B8C0000-0x000000001BBBF000-memory.dmpFilesize
3.0MB
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memory/1492-63-0x000000000286B000-0x000000000288A000-memory.dmpFilesize
124KB
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memory/1492-64-0x0000000002864000-0x0000000002867000-memory.dmpFilesize
12KB
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memory/1492-65-0x000000000286B000-0x000000000288A000-memory.dmpFilesize
124KB
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memory/1492-57-0x000007FEFB931000-0x000007FEFB933000-memory.dmpFilesize
8KB
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memory/1492-56-0x0000000000000000-mapping.dmp