Threat Database Backdoors Backdoor.Agent.CSB

Backdoor.Agent.CSB

By CagedTech in Backdoors

Analysis Report

General information

Family Name: Backdoor.Agent.CSB
Signature status: No Signature

Known Samples

MD5: 0df22e0e1954517de3f89422862371e8
SHA1: 5f1daa9ca70e1b1259cec39155b654f2663e060e
SHA256: 6D8182D6FF3E726AA594375FD6FAF6DA862EC9A57244D9957797F78C0109731E
File Size: 262.15 KB, 262146 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • File doesn't have exports table
  • File doesn't have security information
  • File is 64-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
  • File is not packed
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
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  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

Windows PE Version Information

Name Value
Company Name Adobe Systems Incorporated
File Description Adobe Setup
File Version 7.0.0.0
Internal Name PostInstall
Legal Copyright © 1990-2024 Adobe Systems Inc
Original Filename setup.exe
Private Build September 14, 2024
Product Name Setup
Product Version 7.0.0.0

File Traits

  • 7-zip Installer
  • 7zSFX
  • Installer Manifest
  • Installer Version
  • x64

Block Information

Total Blocks: 638
Potentially Malicious Blocks: 364
Whitelisted Blocks: 274
Unknown Blocks: 0

Visual Map

x 0 x 0 x 0 0 x x x x 0 0 x x x x x 0 0 0 x x x x x x x x x x x x x 0 0 x x 0 x x x x x x x x x x x 0 x x x x x x x 0 x x x x x x x x x x x 0 x x x x x x x x 1 x x x x x x 0 x x x x x x x x x x x 0 x x x x 0 x x 0 x x x x x x x 0 x 1 0 0 x x x x x x x x 0 0 0 0 0 0 0 0 0 0 x x x x x x x x x 0 x 0 x x x x x x x x x x x x x x x x x x x x x x x x 0 0 x x x x x x x x x x x 0 x x x x x x x x 0 x x x x x x 0 x x x x x x x x x x x x x x x x 0 x x x x x x 0 0 0 x x x x x x x x x x x 0 x 0 x 0 x x x x x 0 x x x x x 0 x 0 0 x x 0 x 0 x 1 0 x x x x 0 1 x 1 x x 0 x 0 x 0 0 0 x x 0 x x 0 x x 0 0 x 0 x x x x x 0 0 x 0 0 x x 0 x 0 0 0 x x x 0 0 x x x x 0 0 0 x x 0 0 0 x 0 x 0 x x 0 0 0 x 0 x 0 0 0 x 0 x 0 0 x 0 0 0 x 1 x 0 0 0 x 0 0 0 0 0 0 0 0 0 x 0 x 0 0 0 x 0 x 0 0 0 x 0 0 0 x x x 0 x x 0 0 0 x 0 x 0 x x x 0 x 0 x x x 0 x x 0 x x x 0 0 0 x 0 0 x x x 0 x 0 0 x x 0 0 0 1 x x 0 x x 0 0 0 x 0 x 0 0 0 0 0 x 0 0 0 0 0 0 0 0 x 0 0 x x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x 0 x 0 x x 0 0 0 0 x x x 0 x 0 0 0 x 0 0 0 0 0 x 0 x 0 0 x 0 x x x x 1 0 0 x 0 x x x 0 x x 0 x 0 x 0 0 0 x x x x 0 x 0 x x x 0 0 x x 0 0 0 0 x 0 x x x 0 x x 0 0 0 0 0 x 0 x x x x x x 1 x x x x x x 0 x 0 x 0 x 0 x x x 0 x x 0 x 0 0 0 0 x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Similar Families

  • Agent.CSB
  • Agent.CSE

Files Modified

File Attributes
c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.1.regtrans-ms Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.2.regtrans-ms Generic Read,Write Data,Write Attributes,Write extended,Append data

Registry Modifications

Key::Value Data API Name
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 RegNtPreCreateKey

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAccessCheck
  • ntdll.dll!NtAddAtomEx
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAlpcAcceptConnectPort
  • ntdll.dll!NtAlpcConnectPortEx
  • ntdll.dll!NtAlpcCreatePort
  • ntdll.dll!NtAlpcOpenSenderProcess
  • ntdll.dll!NtAlpcQueryInformation
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
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  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtCreateThreadEx
  • ntdll.dll!NtDeleteValueKey
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtDuplicateObject
  • ntdll.dll!NtDuplicateToken
  • ntdll.dll!NtEnumerateKey
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFindAtom
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtNotifyChangeKey
  • ntdll.dll!NtOpenDirectoryObject
  • ntdll.dll!NtOpenEvent
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenMutant
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenProcessTokenEx
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtOpenSemaphore
  • ntdll.dll!NtOpenThreadToken
  • ntdll.dll!NtOpenThreadTokenEx
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • ntdll.dll!NtQueryInformationFile
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQueryInformationToken
  • ntdll.dll!NtQueryKey
  • ntdll.dll!NtQueryLicenseValue
  • ntdll.dll!NtQueryPerformanceCounter
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQuerySecurityObject
  • ntdll.dll!NtQuerySystemInformation
  • ntdll.dll!NtQuerySystemInformationEx
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtQueryWnfStateData
  • ntdll.dll!NtReadFile
  • ntdll.dll!NtReadRequestData
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseSemaphore
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtResumeThread
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationKey
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationThread
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSetTimer2
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTerminateProcess
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtTraceEvent
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtUnsubscribeWnfStateChange
  • ntdll.dll!NtUpdateWnfStateData
  • ntdll.dll!NtWaitForAlertByThreadId
  • ntdll.dll!NtWaitForMultipleObjects
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN

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