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Add rule get-process-filename.yml #936

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Sep 26, 2024
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Add rule get-process-filename.yml #936

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28 changes: 28 additions & 0 deletions host-interaction/process/get-process-filename.yml
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Original file line number Diff line number Diff line change
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rule:
meta:
name: get process filename
namespace: host-interaction/process
authors:
- [email protected]
description: Retrieves the current process' filename. In the example sample, this was part of a sandbox evasion technique that computed and verified the checksum of the sample's filename.
scopes:
static: basic block
dynamic: unsupported # requires offset features
att&ck:
- Discovery::Process Discovery [T1057]
references:
- https://learn.microsoft.com/en-us/windows/win32/api/winternl/ns-winternl-peb_ldr_data
examples:
- cb948b13a5046a692ec3ed8cc16a9566:0x140013ee2
features:
- and:
# example:
# mov rax, gs:60h ; TEB.ProcessEnvironmentBlock
# mov rcx, [rax+18h] ; PEB64.Ldr
# mov rax, [rcx+20h] ; PEB_LDR_DATA.InMemoryOrderModuleList.Flink
# mov rcx, [rax+50h] ; LDR_DATA_TABLE_ENTRY.FullDllName.Buffer
- arch: amd64
- characteristic: peb access
- offset: 0x18 = PEB->Ldr
- offset: 0x20 = PEB->Ldr->InMemoryOrderModuleList->Flink
- offset: 0x50 = PEB->Ldr->InMemoryOrderModuleList->Flink->FullDllName
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