Analysis Report t6ygT2aU8p.dll

Overview

General Information

Sample Name: t6ygT2aU8p.dll
Analysis ID: 407674
MD5: beed23c8b32850c8f45228c22c8b036d
SHA1: 1b002110ca216433834fac4ddcbf5ec32e86f59c
SHA256: 9e28e8d663048328cf77a9c78fb97b5037510d07b737ca0ee10065bb8bab1fd8
Tags: dllGozi
Infos:

Most interesting Screenshot:

Detection

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

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
Yara detected Ursnif
Machine Learning detection for sample
Contains functionality to read the PEB
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
PE file contains sections with non-standard names
Program does not show much activity (idle)
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)

Classification

AV Detection:

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Found malware configuration
Source: 0.2.loaddll32.exe.2210000.1.raw.unpack Malware Configuration Extractor: Ursnif {"RSA Public Key": "bUd4GFcFHo0e+ZYUbkHaTKXmZ1xEyxvy7Ha6j1WAZbQ7YvMdkqTfD1vHD2y2CmFTRrLK1w5iQroYI0mUpJ4xNknlY+BmJf4xpeJRxxK0RRNeRbW5unSB2vXqxvlTgz6vNZY+9zeztuP2jXKpIm0/s+YxWnsT7eWUtQtD38NlsAPtJdp+3rBxjzAWNKQj7wMA", "c2_domain": ["bing.com", "update4.microsoft.com", "under17.com", "urs-world.com"], "botnet": "5566", "server": "12", "serpent_key": "10301029JSJUYDWG", "sleep_time": "10", "SetWaitableTimer_value": "0", "DGA_count": "10"}
Multi AV Scanner detection for submitted file
Source: t6ygT2aU8p.dll Virustotal: Detection: 63% Perma Link
Source: t6ygT2aU8p.dll Metadefender: Detection: 61% Perma Link
Source: t6ygT2aU8p.dll ReversingLabs: Detection: 82%
Machine Learning detection for sample
Source: t6ygT2aU8p.dll Joe Sandbox ML: detected

Compliance:

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Uses 32bit PE files
Source: t6ygT2aU8p.dll Static PE information: 32BIT_MACHINE, EXECUTABLE_IMAGE, DLL

Key, Mouse, Clipboard, Microphone and Screen Capturing:

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Yara detected Ursnif
Source: Yara match File source: 00000000.00000002.530449797.0000000002210000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000002.00000002.272048426.0000000003370000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000003.00000002.264250429.0000000002A40000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 3.2.rundll32.exe.2a40000.2.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 0.2.loaddll32.exe.2210000.1.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 2.2.rundll32.exe.3370000.2.raw.unpack, type: UNPACKEDPE

E-Banking Fraud:

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Yara detected Ursnif
Source: Yara match File source: 00000000.00000002.530449797.0000000002210000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000002.00000002.272048426.0000000003370000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000003.00000002.264250429.0000000002A40000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 3.2.rundll32.exe.2a40000.2.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 0.2.loaddll32.exe.2210000.1.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 2.2.rundll32.exe.3370000.2.raw.unpack, type: UNPACKEDPE

System Summary:

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Detected potential crypto function
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 3_2_02A25F16
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A23FAB 3_2_02A23FAB
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A22FAF 3_2_02A22FAF
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A292B2 3_2_02A292B2
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A231B3 3_2_02A231B3
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A288BA 3_2_02A288BA
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A213C5 3_2_02A213C5
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A21CD0 3_2_02A21CD0
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A227D4 3_2_02A227D4
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A243D8 3_2_02A243D8
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25A25 3_2_02A25A25
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A2150C 3_2_02A2150C
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A23A14 3_2_02A23A14
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A21B1E 3_2_02A21B1E
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25262 3_2_02A25262
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A22566 3_2_02A22566
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A21967 3_2_02A21967
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A22A69 3_2_02A22A69
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25378 3_2_02A25378
Uses 32bit PE files
Source: t6ygT2aU8p.dll Static PE information: 32BIT_MACHINE, EXECUTABLE_IMAGE, DLL
Source: classification engine Classification label: mal68.troj.winDLL@7/0@0/0
Source: C:\Windows\System32\loaddll32.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\t6ygT2aU8p.dll,DllServer
Source: t6ygT2aU8p.dll Virustotal: Detection: 63%
Source: t6ygT2aU8p.dll Metadefender: Detection: 61%
Source: t6ygT2aU8p.dll ReversingLabs: Detection: 82%
Source: unknown Process created: C:\Windows\System32\loaddll32.exe loaddll32.exe 'C:\Users\user\Desktop\t6ygT2aU8p.dll'
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe 'C:\Users\user\Desktop\t6ygT2aU8p.dll',#1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\t6ygT2aU8p.dll,DllServer
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe 'C:\Users\user\Desktop\t6ygT2aU8p.dll',#1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe 'C:\Users\user\Desktop\t6ygT2aU8p.dll',#1 Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\t6ygT2aU8p.dll,DllServer Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe 'C:\Users\user\Desktop\t6ygT2aU8p.dll',#1 Jump to behavior

Data Obfuscation:

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PE file contains sections with non-standard names
Source: t6ygT2aU8p.dll Static PE information: section name: .code
Uses code obfuscation techniques (call, push, ret)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A2709D push edi; mov dword ptr [esp], FFFF0000h 3_2_02A2709E
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A2709D push 00000000h; mov dword ptr [esp], ebp 3_2_02A270F5
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A2709D push esp; mov dword ptr [esp], 00000040h 3_2_02A2711D
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A2709D push 00000000h; mov dword ptr [esp], ecx 3_2_02A2716C
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-0Ch]; mov dword ptr [esp], edx 3_2_02A25F7B
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-0Ch]; mov dword ptr [esp], eax 3_2_02A25F94
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-08h]; mov dword ptr [esp], eax 3_2_02A25FDD
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-10h]; mov dword ptr [esp], eax 3_2_02A2604B
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-08h]; mov dword ptr [esp], eax 3_2_02A26124
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], edi 3_2_02A2614F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], edx 3_2_02A2625E
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-10h]; mov dword ptr [esp], eax 3_2_02A262B5
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-10h]; mov dword ptr [esp], eax 3_2_02A26343
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-10h]; mov dword ptr [esp], eax 3_2_02A2635D
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], ebp 3_2_02A26368
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-0Ch]; mov dword ptr [esp], eax 3_2_02A26385
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], edx 3_2_02A263B4
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-08h]; mov dword ptr [esp], eax 3_2_02A26483
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-08h]; mov dword ptr [esp], eax 3_2_02A264F2
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-10h]; mov dword ptr [esp], eax 3_2_02A264FE
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-08h]; mov dword ptr [esp], eax 3_2_02A2650A
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], edi 3_2_02A26567
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], edi 3_2_02A265A9
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], eax 3_2_02A26610
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-0Ch]; mov dword ptr [esp], eax 3_2_02A26685
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-08h]; mov dword ptr [esp], ecx 3_2_02A266C2
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-0Ch]; mov dword ptr [esp], eax 3_2_02A266E8
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], edi 3_2_02A26781
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push 00000000h; mov dword ptr [esp], edx 3_2_02A267B6
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-0Ch]; mov dword ptr [esp], eax 3_2_02A2684C
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A25F16 push dword ptr [ebp-0Ch]; mov dword ptr [esp], eax 3_2_02A26858

Hooking and other Techniques for Hiding and Protection:

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Yara detected Ursnif
Source: Yara match File source: 00000000.00000002.530449797.0000000002210000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000002.00000002.272048426.0000000003370000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000003.00000002.264250429.0000000002A40000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 3.2.rundll32.exe.2a40000.2.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 0.2.loaddll32.exe.2210000.1.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 2.2.rundll32.exe.3370000.2.raw.unpack, type: UNPACKEDPE
Source: C:\Windows\System32\loaddll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion:

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Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: C:\Windows\System32\loaddll32.exe Thread delayed: delay time: 120000 Jump to behavior

Anti Debugging:

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Contains functionality to read the PEB
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_02A22A69 xor edi, dword ptr fs:[00000030h] 3_2_02A22A69
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

HIPS / PFW / Operating System Protection Evasion:

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Creates a process in suspended mode (likely to inject code)
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe 'C:\Users\user\Desktop\t6ygT2aU8p.dll',#1 Jump to behavior

Stealing of Sensitive Information:

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Yara detected Ursnif
Source: Yara match File source: 00000000.00000002.530449797.0000000002210000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000002.00000002.272048426.0000000003370000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000003.00000002.264250429.0000000002A40000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 3.2.rundll32.exe.2a40000.2.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 0.2.loaddll32.exe.2210000.1.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 2.2.rundll32.exe.3370000.2.raw.unpack, type: UNPACKEDPE

Remote Access Functionality:

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Yara detected Ursnif
Source: Yara match File source: 00000000.00000002.530449797.0000000002210000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000002.00000002.272048426.0000000003370000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000003.00000002.264250429.0000000002A40000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 3.2.rundll32.exe.2a40000.2.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 0.2.loaddll32.exe.2210000.1.raw.unpack, type: UNPACKEDPE
Source: Yara match File source: 2.2.rundll32.exe.3370000.2.raw.unpack, type: UNPACKEDPE
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Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 signatures2 2 Behavior Graph ID: 407674 Sample: t6ygT2aU8p.dll Startdate: 08/05/2021 Architecture: WINDOWS Score: 68 15 Found malware configuration 2->15 17 Multi AV Scanner detection for submitted file 2->17 19 Yara detected  Ursnif 2->19 21 Machine Learning detection for sample 2->21 7 loaddll32.exe 1 2->7         started        process3 process4 9 cmd.exe 1 7->9         started        11 rundll32.exe 7->11         started        process5 13 rundll32.exe 9->13         started       
No contacted IP infos