Windows Analysis Report
Quarantined Messages (12).zip

Overview

General Information

Sample name: Quarantined Messages (12).zip
Analysis ID: 1438430
MD5: fb66102da29885913218383755e3b9ae
SHA1: 4adc29db7c64da24806bf26fb6914594c97c5d17
SHA256: a5b66402a0ce61012b3bac28124606224f33aa313e790bd46792e3bf2c0c4995
Infos:

Detection

Score: 2
Range: 0 - 100
Whitelisted: false
Confidence: 60%

Signatures

Allocates memory with a write watch (potentially for evading sandboxes)
Creates a process in suspended mode (likely to inject code)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)

Classification

Source: C:\Windows\SysWOW64\unarchiver.exe File opened: C:\Windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9672_none_d08f9da24428a513\MSVCR80.dll Jump to behavior
Source: classification engine Classification label: clean2.winZIP@4/1@0/0
Source: C:\Windows\SysWOW64\unarchiver.exe Mutant created: NULL
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:2744:120:WilError_03
Source: C:\Windows\SysWOW64\unarchiver.exe File created: C:\Users\user\AppData\Local\Temp\unarchiver.log Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: unknown Process created: C:\Windows\SysWOW64\unarchiver.exe "C:\Windows\SysWOW64\unarchiver.exe" "C:\Users\user\Desktop\Quarantined Messages (12).zip"
Source: C:\Windows\SysWOW64\unarchiver.exe Process created: C:\Windows\SysWOW64\7za.exe "C:\Windows\System32\7za.exe" x -pinfected -y -o"C:\Users\user\AppData\Local\Temp\mlkax1j3.a2v" "C:\Users\user\Desktop\Quarantined Messages (12).zip"
Source: C:\Windows\SysWOW64\7za.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\unarchiver.exe Process created: C:\Windows\SysWOW64\7za.exe "C:\Windows\System32\7za.exe" x -pinfected -y -o"C:\Users\user\AppData\Local\Temp\mlkax1j3.a2v" "C:\Users\user\Desktop\Quarantined Messages (12).zip" Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: mscoree.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: apphelp.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: kernel.appcore.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: version.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: windows.storage.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: wldp.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: profapi.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: cryptsp.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: rsaenh.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Section loaded: cryptbase.dll Jump to behavior
Source: C:\Windows\SysWOW64\7za.exe Section loaded: 7z.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe File opened: C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorrc.dll Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe File opened: C:\Windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9672_none_d08f9da24428a513\MSVCR80.dll Jump to behavior
Uses code obfuscation techniques (call, push, ret)
Source: C:\Windows\SysWOW64\unarchiver.exe Code function: 0_2_00C225C1 push eax; iretd 0_2_00C225C2
Source: C:\Windows\SysWOW64\unarchiver.exe Code function: 0_2_00C22D7D push edx; iretd 0_2_00C22D7E
Source: C:\Windows\SysWOW64\unarchiver.exe Code function: 0_2_010D0C9F push ds; ret 0_2_010D0CA2
Source: C:\Windows\SysWOW64\unarchiver.exe Code function: 0_2_010D0C99 push ds; ret 0_2_010D0C9A
Source: C:\Windows\SysWOW64\unarchiver.exe Code function: 0_2_010D0C9B push ds; ret 0_2_010D0C9E
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Allocates memory with a write watch (potentially for evading sandboxes)
Source: C:\Windows\SysWOW64\unarchiver.exe Memory allocated: E80000 memory reserve | memory write watch Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Memory allocated: 2D40000 memory reserve | memory write watch Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Memory allocated: 1020000 memory commit | memory reserve | memory write watch Jump to behavior
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Source: C:\Windows\SysWOW64\unarchiver.exe Window / User API: threadDelayed 553 Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Window / User API: threadDelayed 9413 Jump to behavior
May sleep (evasive loops) to hinder dynamic analysis
Source: C:\Windows\SysWOW64\unarchiver.exe TID: 3260 Thread sleep count: 553 > 30 Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe TID: 3260 Thread sleep time: -276500s >= -30000s Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe TID: 3260 Thread sleep count: 9413 > 30 Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe TID: 3260 Thread sleep time: -4706500s >= -30000s Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Code function: 0_2_00C2B1D6 GetSystemInfo, 0_2_00C2B1D6
Source: C:\Windows\SysWOW64\unarchiver.exe Memory allocated: page read and write | page guard Jump to behavior
Creates a process in suspended mode (likely to inject code)
Source: C:\Windows\SysWOW64\unarchiver.exe Process created: C:\Windows\SysWOW64\7za.exe "C:\Windows\System32\7za.exe" x -pinfected -y -o"C:\Users\user\AppData\Local\Temp\mlkax1j3.a2v" "C:\Users\user\Desktop\Quarantined Messages (12).zip" Jump to behavior
Source: C:\Windows\SysWOW64\unarchiver.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography MachineGuid Jump to behavior
windows-stand
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Legend:

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  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 process2 2 Behavior Graph ID: 1438430 Sample: Quarantined Messages (12).zip Startdate: 08/05/2024 Architecture: WINDOWS Score: 2 6 unarchiver.exe 4 2->6         started        process3 8 7za.exe 3 6->8         started        process4 10 conhost.exe 8->10         started       
⊘No contacted IP infos