Windows Analysis Report
STRDY

Overview

General Information

Sample Name: STRDY (renamed file extension from none to exe)
Analysis ID: 560700
MD5: 9e8c460da94012b43f612fea9d258f88
SHA1: 961f166b1903402eee0d7a5ff84681b7c955e16d
SHA256: aa3bc8c4b305b473089b141908eac382f1e36aa8046daa1c9ca72d45852b8bb3
Infos:

Detection

Score: 68
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
Machine Learning detection for sample
Uses 32bit PE files
Antivirus or Machine Learning detection for unpacked file
Sample file is different than original file name gathered from version info
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
Contains long sleeps (>= 3 min)

Classification

AV Detection

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Source: STRDY.exe Avira: detected
Source: STRDY.exe Virustotal: Detection: 38% Perma Link
Source: STRDY.exe ReversingLabs: Detection: 39%
Source: STRDY.exe Joe Sandbox ML: detected
Source: 0.0.STRDY.exe.880000.0.unpack Avira: Label: TR/Dropper.MSIL.Gen

Compliance

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Source: STRDY.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED
Source: C:\Users\user\Desktop\STRDY.exe File opened: C:\Windows\WinSxS\amd64_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9445_none_88df21dd2faf7c49\MSVCR80.dll Jump to behavior
Source: STRDY.exe Static PE information: NO_SEH, TERMINAL_SERVER_AWARE, DYNAMIC_BASE, NX_COMPAT

System Summary

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Source: STRDY.exe Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED
Source: STRDY.exe, 00000000.00000002.667867261.0000000000C79000.00000004.00000020.00020000.00000000.sdmp Binary or memory string: OriginalFilenamemscorwks.dllT vs STRDY.exe
Source: STRDY.exe, 00000000.00000002.667793557.000000000088E000.00000002.00000001.01000000.00000003.sdmp Binary or memory string: OriginalFilenametest.exe4 vs STRDY.exe
Source: STRDY.exe Binary or memory string: OriginalFilenametest.exe4 vs STRDY.exe
Source: C:\Users\user\Desktop\STRDY.exe Code function: 0_2_00007FFA35F308F2 0_2_00007FFA35F308F2
Source: C:\Users\user\Desktop\STRDY.exe Code function: 0_2_00007FFA35F3000A 0_2_00007FFA35F3000A
Source: STRDY.exe Virustotal: Detection: 38%
Source: STRDY.exe ReversingLabs: Detection: 39%
Source: STRDY.exe Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
Source: C:\Users\user\Desktop\STRDY.exe Key opened: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Section loaded: C:\Windows\assembly\NativeImages_v2.0.50727_64\mscorlib\077cf2bd55145d691314f0889d7a1997\mscorlib.ni.dll Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Section loaded: C:\Windows\assembly\GAC_64\mscorlib\2.0.0.0__b77a5c561934e089\sorttbls.nlp Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Section loaded: C:\Windows\assembly\GAC_64\mscorlib\2.0.0.0__b77a5c561934e089\sortkey.nlp Jump to behavior
Source: unknown Process created: C:\Users\user\Desktop\STRDY.exe "C:\Users\user\Desktop\STRDY.exe"
Source: C:\Users\user\Desktop\STRDY.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6048:120:WilError_01
Source: C:\Users\user\Desktop\STRDY.exe File created: C:\Users\user\AppData\Local\Microsoft\CLR_v2.0\UsageLogs\STRDY.exe.log Jump to behavior
Source: classification engine Classification label: mal68.evad.winEXE@2/1@0/0
Source: STRDY.exe, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs Cryptographic APIs: 'CreateDecryptor'
Source: 0.2.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs Cryptographic APIs: 'CreateDecryptor'
Source: 0.0.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs Cryptographic APIs: 'CreateDecryptor'
Source: STRDY.exe Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR
Source: C:\Users\user\Desktop\STRDY.exe File opened: C:\Windows\WinSxS\amd64_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9445_none_88df21dd2faf7c49\MSVCR80.dll Jump to behavior
Source: STRDY.exe Static PE information: NO_SEH, TERMINAL_SERVER_AWARE, DYNAMIC_BASE, NX_COMPAT

Data Obfuscation

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Source: STRDY.exe, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs .Net Code: stackVariable1.GetMethod("GetDelegateForFunctionPointer", V_0)
Source: 0.2.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs .Net Code: stackVariable1.GetMethod("GetDelegateForFunctionPointer", V_0)
Source: 0.0.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs .Net Code: stackVariable1.GetMethod("GetDelegateForFunctionPointer", V_0)
Source: C:\Users\user\Desktop\STRDY.exe Code function: 0_2_00885E26 push 00000003h; ret 0_2_00885E2C
Source: STRDY.exe, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs High entropy of concatenated method names: '.cctor', 'sXrElhk7vmD8v', 'KoERPmWRW2', 'G3GRDa0qvt', 'gGSRSXbuCh', 'aP8RlNMxmU', 'TqPR9RrNBN', 'ajCRqNgqoA', 'HHqRZmDjky', 'i5cRgkNmqw'
Source: STRDY.exe, projFUD/PA.cs High entropy of concatenated method names: 'Main', 'ReverseString', 'BinaryToString', 'LoadLibraryA', 'GetProcAddress', 'LoadApi', 'Execute', '.cctor', 'QUIDDOLkKVFGth5pU2', 'pDmIUDtbAb40ykJ8os'
Source: 0.2.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs High entropy of concatenated method names: '.cctor', 'sXrElhk7vmD8v', 'KoERPmWRW2', 'G3GRDa0qvt', 'gGSRSXbuCh', 'aP8RlNMxmU', 'TqPR9RrNBN', 'ajCRqNgqoA', 'HHqRZmDjky', 'i5cRgkNmqw'
Source: 0.2.STRDY.exe.880000.0.unpack, projFUD/PA.cs High entropy of concatenated method names: 'Main', 'ReverseString', 'BinaryToString', 'LoadLibraryA', 'GetProcAddress', 'LoadApi', 'Execute', '.cctor', 'QUIDDOLkKVFGth5pU2', 'pDmIUDtbAb40ykJ8os'
Source: 0.0.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs High entropy of concatenated method names: '.cctor', 'sXrElhk7vmD8v', 'KoERPmWRW2', 'G3GRDa0qvt', 'gGSRSXbuCh', 'aP8RlNMxmU', 'TqPR9RrNBN', 'ajCRqNgqoA', 'HHqRZmDjky', 'i5cRgkNmqw'
Source: 0.0.STRDY.exe.880000.0.unpack, projFUD/PA.cs High entropy of concatenated method names: 'Main', 'ReverseString', 'BinaryToString', 'LoadLibraryA', 'GetProcAddress', 'LoadApi', 'Execute', '.cctor', 'QUIDDOLkKVFGth5pU2', 'pDmIUDtbAb40ykJ8os'
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion

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Source: C:\Users\user\Desktop\STRDY.exe TID: 6148 Thread sleep time: -922337203685477s >= -30000s Jump to behavior
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: C:\Users\user\Desktop\STRDY.exe Thread delayed: delay time: 922337203685477 Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Thread delayed: delay time: 922337203685477 Jump to behavior
Source: C:\Users\user\Desktop\STRDY.exe Memory allocated: page read and write | page guard Jump to behavior

HIPS / PFW / Operating System Protection Evasion

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Source: STRDY.exe, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs Reference to suspicious API methods: ('gFwRs55Bjr', 'GetProcAddress@kernel32'), ('z4TRG2i3UQ', 'LoadLibrary@kernel32')
Source: STRDY.exe, projFUD/PA.cs Reference to suspicious API methods: ('LoadLibraryA', 'LoadLibraryA@kernel32'), ('GetProcAddress', 'GetProcAddress@kernel32')
Source: 0.2.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs Reference to suspicious API methods: ('gFwRs55Bjr', 'GetProcAddress@kernel32'), ('z4TRG2i3UQ', 'LoadLibrary@kernel32')
Source: 0.2.STRDY.exe.880000.0.unpack, projFUD/PA.cs Reference to suspicious API methods: ('LoadLibraryA', 'LoadLibraryA@kernel32'), ('GetProcAddress', 'GetProcAddress@kernel32')
Source: 0.0.STRDY.exe.880000.0.unpack, hsnLdkMtt9W3LiVovy/dlLFmbU8fZgjw22Fes.cs Reference to suspicious API methods: ('gFwRs55Bjr', 'GetProcAddress@kernel32'), ('z4TRG2i3UQ', 'LoadLibrary@kernel32')
Source: 0.0.STRDY.exe.880000.0.unpack, projFUD/PA.cs Reference to suspicious API methods: ('LoadLibraryA', 'LoadLibraryA@kernel32'), ('GetProcAddress', 'GetProcAddress@kernel32')