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Steam_api.dll Trojan Downloader Analysis

Updated 2 months ago
Checked by Malaware Check
steam_api.dll

Technical Analysis

File Name steam_api.dll
File Type
PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
Scanner Version 1.0.210.174
Database Version 2025-03-14 08:00:56 UTC
⚠

Trojan.Win32.Downloader.ns

Malware family: Downloader

Downloader Trojans specialize in retrieving and installing additional malware payloads. Unlike comprehensive malware, they focus specifically on payload delivery rather than direct system damage.
N/A
Detection Rate
876,544
File Size (bytes)
2025-03-14
Analysis Date

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File Identification

Hash Type Value Action
MD5
526c4af305f4438ee3ae6ff894d76597
SHA1
66c219421cc5b9e22311c57f1e70c2ab28f244eb
SHA256
b74cc5a17329986d8de5f8a6485d15b3f143cd900fb71b004862777ca39b33bd
SHA512
0158c1755a904aae9dc760792c89c534f83e4ee22b4c5b1b2434088ec33bab9d5403b255cf2c30346182afc4ec0650b0b45fed1d59fc9dad5c4d4b755243092a
ImpHash
0fa5f603594be57c7a33042959196729

PE Analysis

Basic Information

▼
Image Base 0x10000000
Entry Point 0x10c7ad5d
Compilation Time 2021-04-15 01:13:44
Checksum 0x000db8e3 (Actual: 0x000db8e3)
OS Version 5.1
PEiD Signatures PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
Digital Signature No valid SignedData structure was found.
Imports 10 libraries
KERNEL32, USER32, ADVAPI32, SHELL32, ole32, WS2_32, WINHTTP, SHLWAPI, PSAPI, bcrypt
Exports 1422 functions
Resources 2 Resources
Sections 7 Sections

Version Information

▼
Comments Valve SpecialBuild
CompanyName Valve Corporation
FileDescription Steam Client API
FileVersion 06.28.18.86
InternalName Steam Client API (buildbot_steam-relclient-win32-builder_steam_rel_client_win32@steam-relclient-win32-builder)
LegalCopyright Copyright (C) 2007
OriginalFilename steam_api.dll
ProductName Steam Client API
ProductVersion 01.00.00.01
Source Control ID 6281886
Translation 0x0804 0x04b0

PE Sections

▼
Name Virtual Address Virtual Size Raw Size Entropy Characteristics MD5
.text 0x00001000 402,968 bytes 0 bytes 0.00 (Normal) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ D41D8CD98F00B204E9800998ECF8427E
.rdata 0x00064000 177,675 bytes 0 bytes 0.00 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ D41D8CD98F00B204E9800998ECF8427E
.data 0x00090000 11,367,300 bytes 0 bytes 0.00 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE D41D8CD98F00B204E9800998ECF8427E
.UPX0 0x00b68000 706,344 bytes 0 bytes 0.00 (Normal) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ D41D8CD98F00B204E9800998ECF8427E
.UPX1 0x00c15000 872,624 bytes 872,960 bytes 7.96 (Packed/Encrypted) IMAGE_SCN_CNT_CODE|IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE DC3E20235C8A343BEC43FA7EAB41C6A6
.reloc 0x00ceb000 180 bytes 512 bytes 2.35 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ 90087CEB4B3F355F266F8D96A696F8C0
.rsrc 0x00cec000 1,578 bytes 2,048 bytes 3.37 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ C4E3BC2D535D153DC9238CE2846B74EB
Entropy Analysis Alert

1 section(s) with high entropy (≥7.5) detected - possible packing/encryption

Resource Analysis

▼
Total Resources: 2 (1,418 bytes)
Resource Type Count Total Size Percentage
RT_VERSION 1 1,072 bytes
75.6%
RT_MANIFEST 1 346 bytes
24.4%

Certificate Chain Analysis

▼
No Digital Signatures

This file is not digitally signed.

Security Implications:
  • Cannot verify the publisher's identity
  • Increased security risk when running this file
  • May trigger security warnings on some systems

⚠ This file either lacks a digital signature or the certificate chain could not be verified
Exercise caution when executing unsigned files from unknown sources

Certificate Verification Status

No valid SignedData structure was found.

Recommendation: Verify the file source and ensure it comes from a trusted publisher.

Trojan.Win32.Downloader.ns Removal

Gridinsoft has the capability to identify and eliminate Trojan.Win32.Downloader.ns without requiring further user intervention.

Download Anti-Malware

Removal Instructions

Follow these steps to completely remove the threat from your system

  1. Start by downloading Gridinsoft Anti-Malware to your computer.
  2. Double-click on the gsam-en-install.exe file and follow the on-screen instructions to install the program.
  3. Once the installation of Gridinsoft Anti-Malware is complete, the program will open on the Scan screen.
  4. Click on the "Standard Scan" button to begin scanning your computer for threats.
  5. After the scanning process is finished, click on "Clean Now" to remove any detected threats.
  6. If prompted, restart your system to complete the removal process and ensure all threats are eliminated.
Important: Before You Start
Disconnect from the internet to prevent the malware from spreading or downloading additional threats. Run the scan in Safe Mode for better detection and removal of persistent threats.

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