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
}
}
截图效果: