先总结一下,一个进程的名字有可能从以下部位获取(参考小伟同学的《伪造进程初探》一文):

一、EPROCESS中:

    1、EPROCESS-->ImageFileName(很常用,冰刃获取进程名的地方)

    2、EPROCESS-->SeAuditProcessCreationInfo->ImageFileName(任务管理器获取进程名的地方,NtQueryInformationProcess就是从这里获取进程名的)

    3、EPROCESS->SectionObject->Segment->ControlArea->FileObject->FileName(RKU获取进程名的方法)

    4、VAD(记录用户空间内存分配情况的数据结构,里面当然有进程的exe模块)

 

二、PEB中:

    1、PEB-->ProcessParameters-->ImagePathName

    2、PEB-->ProcessParameters-->CommandLine

    3、PEB-->ProcessParameters-->WindowTitle(这个地方比较奇怪,如果双击的是exe的快捷方式,则记录的是快捷方式的路径,还是一并改掉的好)

    4、PEB-->LDR-->InLoadOrderModuleList->第一个结构->FullDllName

    5、PEB-->LDR-->InLoadOrderModuleList->第一个结构->BaseDllName

    6、PEB-->LDR-->InMemoryOrderModuleList->第一个结构->FullDllName(此处的BaseDllName貌似为NULL,就不管它了)

    (PEB-->LDR-->InInitializationOrderModuleList这个表里貌似没有exe模块,也不管它了)

 

把这些地方都改掉即可彻底改掉进程名(如果不够彻底,谢谢补充!)。

示例代码如下(示例代码中以winmine.exe做测试,平台为XP SP3。代码中硬编码很多,通用性不强。囧):

//Fypher
//http://hi.baidu.com/nmn714
VOID ChangeName(ULONG pProcess){
    ULONG peb,ProcessParameters,ldr;
    ULONG InLoadOrderModuleList;
    ULONG InMemoryOrderModuleList;
    ULONG tmp;
    KAPC_STATE kapc;
    PUCHAR str;
    PWCHAR wstr;
 
    //get PEB
    peb=*(PULONG)(pProcess + 0x1b0);
 
    KeStackAttachProcess((PEPROCESS)pProcess,&kapc);
    __try{
        ProcessParameters = *(PULONG)(peb + 0x010);
        //ImagePathName
        FindAndChangeUni(ProcessParameters+0x038);
        //CommandLine
        FindAndChangeUni(ProcessParameters+0x040);
        //WindowTitle
        FindAndChangeUni(ProcessParameters+0x070);
        //Ldr
        ldr = *(PULONG)(peb + 0x00c);
        //InLoadOrderModuleList->FullDllName
        InLoadOrderModuleList = *(PULONG)(ldr+0x00c);
        FindAndChangeUni(InLoadOrderModuleList+0x024);
        //InLoadOrderModuleList->BaseDllName
        FindAndChangeUni(InLoadOrderModuleList+0x02c);
        //InMemoryOrderModuleList->FullDllName
        InMemoryOrderModuleList = *(PULONG)(ldr+0x014);
        FindAndChangeUni(InMemoryOrderModuleList+0x024);
    }__except(1){
        KdPrint(("exception occured!"));
    }
    KeUnstackDetachProcess (&kapc);
    //EPROCESS-->ImageFileName
    FindAndChangeA(pProcess+0x174,16);
    //EPROCESS-->SeAuditProcessCreationInfo->ImageFileName
    FindAndChangeUni(*(PULONG)(pProcess + 0x1F4));
    //EPROCESS->SectionObject->Segment->ControlArea->FileObject->FileName
    //should use MmIsAddressValid to verify
    tmp=*(PULONG)(pProcess+0x138);
    tmp=*(PULONG)(tmp+0x14);
    tmp=*(PULONG)tmp;
    tmp=*(PULONG)(tmp+0x024);
    FindAndChangeUni(tmp+0x030);
 
    //VAD
    //should use MmIsAddressValid to verify
    tmp=*(PULONG)(pProcess+0x11c);
    tmp=*(PULONG)(tmp+0x10);
    tmp=*(PULONG)(tmp+0x018);
    tmp=*(PULONG)(tmp+0x024);
    FindAndChangeUni(tmp+0x030);
}

 

其中,FindAndChangeUni和FindAndChangeA的作用是在一个字符串(UNICODE_STRING或CHAR)中定位“winmine.exe”并改成"winxxoo.exe"。代码如下:

//Fypher
//http://hi.baidu.com/nmn714
VOID FindAndChangeUni(ULONG strAddr){
    PUNICODE_STRING uniStr = (PUNICODE_STRING)strAddr;
    ULONG len = uniStr->Length / 2;
    ULONG maxLen = uniStr->MaximumLength / 2;
    PWCHAR str = uniStr->Buffer;
    ULONG i=0;
    if(!str || len<11|| maxLen<11 )
        return;
    for(i=0;i<= len - 11;++i){
        if(!_wcsnicmp(str+i,L"winmine.exe",11))
            break;
    }
    if(i>len - 11)
        return;
 
    _asm{
        cli
            mov eax, cr0
            and eax, not 0x10000
            mov cr0, eax
    }
    //str可能是PEB中的,故try之
    __try{
        str[i+3]=L'x';
        str[i+4]=L'x';
        str[i+5]=L'o';
        str[i+6]=L'o';
    }__except(1){
    }   
    _asm{
        mov eax, cr0
            or eax,0x10000
            mov cr0,eax
            sti
    }
}
VOID FindAndChangeA(ULONG strAddr,ULONG len){
    PUCHAR str = (PUCHAR)strAddr;
    ULONG i=0;
    if(!str || len<11 )
        return;
    for(i=0;i<= len - 11;++i){
        if(!_strnicmp(str+i,"winmine.exe",11))
            break;
    }
    if(i>len - 11)
        return;
 
    _asm{
        cli
            mov eax, cr0
            and eax, not 0x10000
            mov cr0, eax
    }
    //str可能是PEB中的,故try之
    __try{
        str[i+3]='x';
        str[i+4]='x';
        str[i+5]='o';
        str[i+6]='o';
    }__except(1){
    }   
 
    _asm{
        mov eax, cr0
            or eax,0x10000
            mov cr0,eax
            sti
    }
}