Analysis
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max time kernel
85s -
max time network
93s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
03-02-2023 19:27
Static task
static1
Behavioral task
behavioral1
Sample
Loader.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
Loader.exe
Resource
win10v2004-20221111-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/1484-55-0x000000001C100000-0x000000001C3D8000-memory.dmp family_purecrypter -
Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
Loader.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\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 21 IoCs
Processes:
powershell.exeLoader.exepid process 1064 powershell.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe 1484 Loader.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
powershell.exeLoader.exedescription pid process Token: SeDebugPrivilege 1064 powershell.exe Token: SeDebugPrivilege 1484 Loader.exe -
Suspicious use of WriteProcessMemory 33 IoCs
Processes:
Loader.exedescription pid process target process PID 1484 wrote to memory of 1064 1484 Loader.exe powershell.exe PID 1484 wrote to memory of 1064 1484 Loader.exe powershell.exe PID 1484 wrote to memory of 1064 1484 Loader.exe powershell.exe PID 1484 wrote to memory of 596 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 596 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 596 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 804 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 804 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 804 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1352 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1352 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1352 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 628 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 628 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 628 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1536 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1536 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1536 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1608 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1608 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1608 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1836 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1836 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1836 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 828 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 828 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 828 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1004 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1004 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1004 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1948 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1948 1484 Loader.exe MSBuild.exe PID 1484 wrote to memory of 1948 1484 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:1484 -
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:1064 -
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:596
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:804
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1352
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:628
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1536
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1608
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1836
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:828
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1004
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C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe2⤵PID:1948
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/1064-61-0x0000000002634000-0x0000000002637000-memory.dmpFilesize
12KB
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memory/1064-56-0x0000000000000000-mapping.dmp
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memory/1064-57-0x000007FEFB941000-0x000007FEFB943000-memory.dmpFilesize
8KB
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memory/1064-58-0x000007FEEC0B0000-0x000007FEECAD3000-memory.dmpFilesize
10.1MB
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memory/1064-60-0x000007FEEB550000-0x000007FEEC0AD000-memory.dmpFilesize
11.4MB
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memory/1064-62-0x000000000263B000-0x000000000265A000-memory.dmpFilesize
124KB
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memory/1064-63-0x0000000002634000-0x0000000002637000-memory.dmpFilesize
12KB
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memory/1064-64-0x000000000263B000-0x000000000265A000-memory.dmpFilesize
124KB
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memory/1484-55-0x000000001C100000-0x000000001C3D8000-memory.dmpFilesize
2.8MB
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memory/1484-59-0x00000000026E7000-0x0000000002706000-memory.dmpFilesize
124KB
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memory/1484-54-0x00000000003D0000-0x0000000000572000-memory.dmpFilesize
1.6MB
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memory/1484-65-0x000000001CDA0000-0x000000001CE5C000-memory.dmpFilesize
752KB
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memory/1484-66-0x00000000026E7000-0x0000000002706000-memory.dmpFilesize
124KB