Windows Analysis Report
knigger.bin

Overview

General Information

Sample Name: knigger.bin (renamed file extension from bin to dll)
Analysis ID: 564921
MD5: f2fdb0f416abda7c5fb8436578f1b6c8
SHA1: cb35382ae44bc43c1372a21b04fc214885a4d8f2
SHA256: 5e5242e1251bfb745e068b413dab59a74afe94850e1b8d02acb607c50ce63fd0
Infos:

Detection

Dridex
Score: 88
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Antivirus / Scanner detection for submitted sample
Found malware configuration
Yara detected Dridex unpacked file
Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Sigma detected: Suspicious Call by Ordinal
C2 URLs / IPs found in malware configuration
Uses 32bit PE files
AV process strings found (often used to terminate AV products)
Yara signature match
Sample file is different than original file name gathered from version info
One or more processes crash
Contains functionality to query locales information (e.g. system language)
Uses code obfuscation techniques (call, push, ret)
Checks if the current process is being debugged
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Creates a process in suspended mode (likely to inject code)
IP address seen in connection with other malware
Entry point lies outside standard sections

Classification

AV Detection
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Antivirus / Scanner detection for submitted sample
Source: knigger.dll Avira: detected
Found malware configuration
Source: 2.2.rundll32.exe.6f270000.2.unpack Malware Configuration Extractor: Dridex {"Version": 22201, "C2 list": ["144.91.122.100:443", "188.214.241.242:4664", "93.104.209.107:8116", "5.189.190.214:593"], "RC4 keys": ["S9OYlNFUvY5N1RDSpi8BgH6SgS8gPIcU", "rRgzULsP0KBJ7CcLRdZ7mhoBdNxJNQSrQLI3uRuRJVi7lqosB75laFDkwhMJ8LECg1b8sYjJZr"]}
Multi AV Scanner detection for submitted file
Source: knigger.dll ReversingLabs: Detection: 69%

Compliance
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Uses 32bit PE files
Source: knigger.dll Static PE information: 32BIT_MACHINE, EXECUTABLE_IMAGE, DLL
Source: knigger.dll Static PE information: DYNAMIC_BASE, NX_COMPAT
Source: Binary string: RFFGTEQ.pdb source: loaddll32.exe, 00000000.00000002.353161046.000000006F508000.00000002.00000001.01000000.00000003.sdmp, knigger.dll

Networking
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C2 URLs / IPs found in malware configuration
Source: Malware configuration extractor IPs: 144.91.122.100:443
Source: Malware configuration extractor IPs: 188.214.241.242:4664
Source: Malware configuration extractor IPs: 93.104.209.107:8116
Source: Malware configuration extractor IPs: 5.189.190.214:593
Internet Provider seen in connection with other malware
Source: Joe Sandbox View ASN Name: BORECOM-INNOVABorecom-InnovaES BORECOM-INNOVABorecom-InnovaES
Source: Joe Sandbox View ASN Name: MNET-ASGermanyDE MNET-ASGermanyDE
IP address seen in connection with other malware
Source: Joe Sandbox View IP Address: 188.214.241.242 188.214.241.242
Source: Joe Sandbox View IP Address: 93.104.209.107 93.104.209.107
Source: Amcache.hve.6.dr String found in binary or memory: http://upx.sf.net
Source: rundll32.exe, 00000002.00000000.358373179.000000006F28F000.00000002.00000001.01000000.00000003.sdmp String found in binary or memory: http://www.kazanfirst.ruDVarFileInfo$

E-Banking Fraud
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Yara detected Dridex unpacked file
Source: Yara match File source: 2.0.rundll32.exe.6f270000.5.unpack, type: UNPACKEDPE
Source: Yara match File source: 2.0.rundll32.exe.6f270000.2.unpack, type: UNPACKEDPE
Source: Yara match File source: 2.2.rundll32.exe.6f270000.2.unpack, type: UNPACKEDPE
Source: Yara match File source: 00000002.00000002.370546422.000000006F271000.00000020.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match File source: 00000002.00000000.358345713.000000006F271000.00000020.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match File source: 00000002.00000000.357555659.000000006F271000.00000020.00000001.01000000.00000003.sdmp, type: MEMORY

System Summary
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Malicious sample detected (through community Yara rule)
Source: 2.0.rundll32.exe.32fc63b.4.raw.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.2.rundll32.exe.11a0000.0.raw.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.2.rundll32.exe.11a0000.0.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.0.rundll32.exe.32fc63b.1.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.0.rundll32.exe.11a0000.3.raw.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.0.rundll32.exe.32fc63b.1.raw.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.0.rundll32.exe.32fc63b.4.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.2.rundll32.exe.32fc63b.1.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.0.rundll32.exe.11a0000.0.raw.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.0.rundll32.exe.11a0000.0.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.0.rundll32.exe.11a0000.3.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 2.2.rundll32.exe.32fc63b.1.raw.unpack, type: UNPACKEDPE Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 00000002.00000002.370345630.00000000011A0000.00000040.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 00000002.00000000.358193713.00000000011A0000.00000040.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects unknown DLL Loader Author: ditekSHen
Source: 00000002.00000000.357246849.00000000011A0000.00000040.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects unknown DLL Loader Author: ditekSHen
Uses 32bit PE files
Source: knigger.dll Static PE information: 32BIT_MACHINE, EXECUTABLE_IMAGE, DLL
Yara signature match
Source: 2.0.rundll32.exe.32fc63b.4.raw.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.2.rundll32.exe.11a0000.0.raw.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.2.rundll32.exe.11a0000.0.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.0.rundll32.exe.32fc63b.1.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.0.rundll32.exe.11a0000.3.raw.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.0.rundll32.exe.32fc63b.1.raw.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.0.rundll32.exe.32fc63b.4.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.2.rundll32.exe.32fc63b.1.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.0.rundll32.exe.11a0000.0.raw.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.0.rundll32.exe.11a0000.0.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.0.rundll32.exe.11a0000.3.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 2.2.rundll32.exe.32fc63b.1.raw.unpack, type: UNPACKEDPE Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 00000002.00000002.370345630.00000000011A0000.00000040.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 00000002.00000000.358193713.00000000011A0000.00000040.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Source: 00000002.00000000.357246849.00000000011A0000.00000040.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_DLLLoader author = ditekSHen, description = Detects unknown DLL Loader
Sample file is different than original file name gathered from version info
Source: knigger.dll Binary or memory string: OriginalFilenameNrt.dllD vs knigger.dll
One or more processes crash
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\WerFault.exe -u -p 6324 -s 700
Detected potential crypto function
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F280730 2_2_6F280730
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F289370 2_2_6F289370
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F278428 2_2_6F278428
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F28143C 2_2_6F28143C
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F271494 2_2_6F271494
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F27A4E8 2_2_6F27A4E8
Source: knigger.dll ReversingLabs: Detection: 69%
Source: C:\Windows\System32\loaddll32.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\knigger.dll",#1
Source: unknown Process created: C:\Windows\System32\loaddll32.exe loaddll32.exe "C:\Users\user\Desktop\knigger.dll"
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\knigger.dll",#1
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\knigger.dll",#1
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\WerFault.exe -u -p 6324 -s 700
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\knigger.dll",#1 Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\knigger.dll",#1 Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess6324
Source: C:\Windows\SysWOW64\WerFault.exe File created: C:\ProgramData\Microsoft\Windows\WER\Temp\WERF4EC.tmp Jump to behavior
Source: classification engine Classification label: mal88.troj.winDLL@6/6@0/4
Source: C:\Windows\SysWOW64\WerFault.exe File read: C:\Windows\System32\drivers\etc\hosts Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe File read: C:\Windows\System32\drivers\etc\hosts Jump to behavior
Source: knigger.dll Static PE information: DYNAMIC_BASE, NX_COMPAT
Source: knigger.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: Binary string: RFFGTEQ.pdb source: loaddll32.exe, 00000000.00000002.353161046.000000006F508000.00000002.00000001.01000000.00000003.sdmp, knigger.dll

Data Obfuscation
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Uses code obfuscation techniques (call, push, ret)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F27F6A8 push esi; mov dword ptr [esp], 00000000h 2_2_6F27F6A9
Entry point lies outside standard sections
Source: initial sample Static PE information: section where entry point is pointing to: .rdata

Hooking and other Techniques for Hiding and Protection
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Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Source: C:\Windows\SysWOW64\WerFault.exe Registry key monitored for changes: HKEY_CURRENT_USER_Classes Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: FAILCRITICALERRORS | NOGPFAULTERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\WerFault.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: Amcache.hve.6.dr Binary or memory string: VMware
Source: Amcache.hve.6.dr Binary or memory string: scsi/disk&ven_vmware&prod_virtual_disk/5&1ec51bf7&0&000000
Source: Amcache.hve.6.dr Binary or memory string: VMware-42 35 34 13 2a 07 0a 9c-ee 7f dd c3 60 c7 b9 af
Source: Amcache.hve.6.dr Binary or memory string: @scsi/cdrom&ven_necvmwar&prod_vmware_sata_cd00/5&280b647&0&000000
Source: Amcache.hve.6.dr Binary or memory string: VMware Virtual USB Mouse
Source: Amcache.hve.6.dr Binary or memory string: VMware, Inc.
Source: Amcache.hve.6.dr Binary or memory string: VMware Virtual disk SCSI Disk Devicehbin
Source: Amcache.hve.6.dr Binary or memory string: Microsoft Hyper-V Generation Counter
Source: Amcache.hve.6.dr Binary or memory string: VMware7,1
Source: Amcache.hve.6.dr Binary or memory string: NECVMWar VMware SATA CD00
Source: Amcache.hve.6.dr Binary or memory string: VMware Virtual disk SCSI Disk Device
Source: Amcache.hve.6.dr Binary or memory string: scsi\cdromnecvmwarvmware_sata_cd001.00,scsi\cdromnecvmwarvmware_sata_cd00,scsi\cdromnecvmwar,scsi\necvmwarvmware_sata_cd001,necvmwarvmware_sata_cd001,gencdrom
Source: Amcache.hve.6.dr Binary or memory string: scsi\diskvmware__virtual_disk____2.0_,scsi\diskvmware__virtual_disk____,scsi\diskvmware__,scsi\vmware__virtual_disk____2,vmware__virtual_disk____2,gendisk
Source: Amcache.hve.6.dr Binary or memory string: BiosVendor:VMware, Inc.,BiosVersion:VMW71.00V.13989454.B64.1906190538,BiosReleaseDate:06/19/2019,BiosMajorRelease:0xff,BiosMinorRelease:0xff,SystemManufacturer:VMware, Inc.,SystemProduct:VMware7,1,SystemFamily:,SystemSKUNumber:,BaseboardManufacturer:,BaseboardProduct:,BaseboardVersion:,EnclosureType:0x1x
Source: Amcache.hve.6.dr Binary or memory string: VMware, Inc.me
Source: Amcache.hve.6.dr Binary or memory string: scsi/cdrom&ven_necvmwar&prod_vmware_sata_cd00/5&280b647&0&000000
Source: Amcache.hve.6.dr Binary or memory string: :scsi/disk&ven_vmware&prod_virtual_disk/5&1ec51bf7&0&000000

Anti Debugging
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Checks if the current process is being debugged
Source: C:\Windows\System32\loaddll32.exe Process queried: DebugPort Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process queried: DebugPort Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process queried: DebugPort Jump to behavior
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F276D0C GetUserNameW,MessageBoxW,GetLastError,CreateFileA,DebugBreak,FlushFileBuffers,FreeEnvironmentStringsA,GetConsoleOutputCP,GetEnvironmentStrings,GetLocaleInfoA,GetStartupInfoA,GetStringTypeA,HeapValidate,IsBadReadPtr,LCMapStringA,LoadLibraryA,OutputDebugStringA, 2_2_6F276D0C

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\knigger.dll",#1 Jump to behavior

Language, Device and Operating System Detection
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Contains functionality to query locales information (e.g. system language)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetUserNameW,MessageBoxW,GetLastError,CreateFileA,DebugBreak,FlushFileBuffers,FreeEnvironmentStringsA,GetConsoleOutputCP,GetEnvironmentStrings,GetLocaleInfoA,GetStartupInfoA,GetStringTypeA,HeapValidate,IsBadReadPtr,LCMapStringA,LoadLibraryA,OutputDebugStringA, 2_2_6F276D0C
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6F276D0C GetUserNameW,MessageBoxW,GetLastError,CreateFileA,DebugBreak,FlushFileBuffers,FreeEnvironmentStringsA,GetConsoleOutputCP,GetEnvironmentStrings,GetLocaleInfoA,GetStartupInfoA,GetStringTypeA,HeapValidate,IsBadReadPtr,LCMapStringA,LoadLibraryA,OutputDebugStringA, 2_2_6F276D0C

Lowering of HIPS / PFW / Operating System Security Settings
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AV process strings found (often used to terminate AV products)
Source: Amcache.hve.6.dr Binary or memory string: c:\program files\windows defender\msmpeng.exe
windows-stand
Hide Legend

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 dnsIp2 2 Behavior Graph ID: 564921 Sample: knigger.bin Startdate: 02/02/2022 Architecture: WINDOWS Score: 88 17 93.104.209.107 MNET-ASGermanyDE Germany 2->17 19 144.91.122.100 CONTABODE Germany 2->19 21 2 other IPs or domains 2->21 23 Found malware configuration 2->23 25 Malicious sample detected (through community Yara rule) 2->25 27 Antivirus / Scanner detection for submitted sample 2->27 29 4 other signatures 2->29 9 loaddll32.exe 1 2->9         started        signatures3 process4 process5 11 cmd.exe 1 9->11         started        process6 13 rundll32.exe 11->13         started        process7 15 WerFault.exe 23 9 13->15         started       
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
188.214.241.242
 unknown Spain
62412 BORECOM-INNOVABorecom-InnovaES true
93.104.209.107
 unknown Germany
8767 MNET-ASGermanyDE true
144.91.122.100
 unknown Germany
51167 CONTABODE true
5.189.190.214
 unknown Germany
51167 CONTABODE true