Client_windows_amd64.exe Trojan Agent Analysis

Updated 1 day ago

Checked by Malware Check

client_windows_amd64.exe

Technical Analysis

File Name	client_windows_amd64.exe
File Type	PE32+ executable (GUI) x86-64 (stripped to external PDB), for MS Windows
Scanner Version	1.0.250.174
Database Version	2026-07-29 10:00:37 UTC

⚠

Trojan.Win64.Agent.oa!s1

Malware family: Agent

Trojan Agent malware disguises itself as legitimate software while performing unauthorized activities including data theft and providing remote system access to threat actors.

N/A

Detection Rate

4,708,352

File Size (bytes)

2026-07-29

Analysis Date

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File Identification

Hash Type	Value	Action
MD5	2c853ef99777c0500fa999f3e6ca8b2b
SHA1	135b5719944fdc2ec73132289ac035bef0f4e54a
SHA256	0ae6d5f0aaa2510f460187135ff889723315bc8fb3f9c4abb2f657aef0795ac1
SHA512	09b3570beb9e1f866a9a09abb8c0e05084cadc098c81b3bc2a05b04b42b53c05859602a4d9215407807725eb5c57e872e356fe53fad01539b9388a6d84771dca
ImpHash	29c78be06b08f1034fb52a93199307ff

PE Analysis

Basic Information

▼

Image Base	`0x00400000`
Entry Point	`0x004014b0`
Compilation Time	1970-01-01 00:00:00
Checksum	0x00481c5c (Actual: 0x0048bd6d)
OS Version	6.1
PEiD Signatures	`PE32+ executable (GUI) x86-64 (stripped to external PDB), for MS Windows`
Digital Signature	No valid SignedData structure was found.
Imports	2 libraries KERNEL32, msvcrt
Exports	1 functions
Resources	0 Resources
Sections	11 Sections

PE Sections

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Name	Virtual Address	Virtual Size	Raw Size	Entropy	Characteristics	MD5
`.text`	`0x00001000`	677,504 bytes	677,888 bytes	6.23 (Normal)	`IMAGE_SCN_CNT_CODE\|IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_EXECUTE\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_ALIGN_32BYTES`	`77103581C95EDE81877802F4AD13314C`
`.data`	`0x000a7000`	3,294,240 bytes	3,294,720 bytes	7.97 (Packed/Encrypted)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_MEM_WRITE\|IMAGE_SCN_ALIGN_32BYTES`	`DD08EC3E6DCD0AE663EAD5B2D86620C9`
`.rdata`	`0x003cc000`	711,408 bytes	711,680 bytes	5.23 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_ALIGN_32BYTES`	`4BDD4D845EA5A6F1642BE618159BC285`
`.pdata`	`0x0047a000`	972 bytes	1,024 bytes	4.67 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_ALIGN_4BYTES`	`471337A74C2E07465D3ECD20748261D7`
`.xdata`	`0x0047b000`	780 bytes	1,024 bytes	3.34 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_ALIGN_4BYTES`	`7AC9E61EA801B941D0D0552F8E35C480`
`.bss`	`0x0047c000`	365,860 bytes	0 bytes	0.00 (Normal)	`IMAGE_SCN_CNT_UNINITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_MEM_WRITE\|IMAGE_SCN_ALIGN_32BYTES`	`D41D8CD98F00B204E9800998ECF8427E`
`.edata`	`0x004d6000`	78 bytes	512 bytes	0.84 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_ALIGN_4BYTES`	`6794BC0504F3D4BBCB0D1244DF518DED`
`.idata`	`0x004d7000`	3,868 bytes	4,096 bytes	4.29 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_MEM_WRITE\|IMAGE_SCN_ALIGN_4BYTES`	`AB6DFD728CECD3AB7019E0B59EC16E30`
`.CRT`	`0x004d8000`	104 bytes	512 bytes	0.28 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_MEM_WRITE\|IMAGE_SCN_ALIGN_8BYTES`	`24136F8BB49AC663A9876A1FFB39C353`
`.tls`	`0x004d9000`	16 bytes	512 bytes	0.00 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_MEM_WRITE\|IMAGE_SCN_ALIGN_8BYTES`	`BF619EAC0CDF3F68D496EA9344137E8B`
`.reloc`	`0x004da000`	15,028 bytes	15,360 bytes	5.40 (Normal)	`IMAGE_SCN_CNT_INITIALIZED_DATA\|IMAGE_SCN_MEM_DISCARDABLE\|IMAGE_SCN_MEM_READ\|IMAGE_SCN_ALIGN_4BYTES`	`770539BE1C0ECBCAFE06B59EE6A7006A`

Entropy Analysis Alert

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

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.Win64.Agent.oa!s1 Removal

Gridinsoft has the capability to identify and eliminate Trojan.Win64.Agent.oa!s1 without requiring further user intervention.

Download Anti-Malware

Removal Instructions

Follow these steps to completely remove the threat from your system

1
Get Gridinsoft Anti-Malware — it's a quick 2 MB download that won't slow down your PC.
2
Run the installer gsam-en-install.exe. The setup takes about 2 minutes and doesn't require a restart.
3
The app launches right after installation. You'll see the main dashboard with the scan button front and center.
4
Hit "Standard Scan" — this checks all the spots where malware typically hides: temp folders, browser data, startup programs, and system directories.
5
Once the scan finds this threat, click "Clean Now". The removal usually happens instantly, though some stubborn infections may need a reboot.
6
If you see a restart prompt, go ahead and reboot. This clears any malware that was running in memory and ensures your system starts fresh.

Important: Before You Start

Quick tip: unplug from the internet before scanning. Some malware phones home for instructions or downloads extra payloads when it senses trouble. If the infection is severe, boot into Safe Mode first — it limits what can run and makes cleanup easier.

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