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OANAN 3.exe Trojan Downloader Analysis

Updated 2 months ago
Checked by Malware Check
OANAN 3.exe

Technical Analysis

File Name OANAN 3.exe
File Type
PE32 executable (GUI) Intel 80386, for MS Windows
Scanner Version 1.0.228.174
Database Version 2025-10-26 12:00:16 UTC
⚠

Trojan.Win32.Downloader.oa!s1

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
76,927,117
File Size (bytes)
2025-10-26
Analysis Date

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File Identification

Hash Type Value Action
MD5
18140731f64f12147b414be0a840c557
SHA1
d516c2686201739f7975d50ae42d33637bbca1dd
SHA256
5d94b22f295a6e93d6e3a57b5525a830a419b520c8f3744a3a52c9e7d504f2ed
SHA512
55046cceccbdbe240eb5e1051c118a2593c08821c05f67ca8ea224f0cb1c569b41ee747378a71e9f19c00169329a288b10d0e1d05d7ba972f92feb69253a74d5
ImpHash
f67c2d48a0d9fae633478c7ae08a5655

PE Analysis

Basic Information

▼
Icon
Hash: 8302ce167b5743c121b94ccfb89a1aa1
Fuzzy: d22bd7a10a9db3bfcb133208c8496754
dHash: 3062643462321824
Image Base 0x00400000
Entry Point 0x00463713
Compilation Time 2023-01-04 17:47:34
Checksum 0x00000000 (Actual: 0x04963994)
OS Version 5.1
PEiD Signatures PE32 executable (GUI) Intel 80386, for MS Windows
Digital Signature No valid SignedData structure was found.
Imports 7 libraries
COMCTL32, WINMM, KERNEL32, USER32, GDI32, COMDLG32, SHELL32
Exports 2 functions
Resources 12 Resources
Sections 5 Sections

Version Information

▼
CompanyName
FileDescription
FileVersion
LegalCopyright
Translation 0x0400 0x04b0

PE Sections

▼
Name Virtual Address Virtual Size Raw Size Entropy Characteristics MD5
.text 0x00001000 541,171 bytes 541,184 bytes 6.60 (Compressed) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ E467D5BEEEC0315B0B116DEA2582DC9F
.rdata 0x00086000 108,482 bytes 108,544 bytes 6.05 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ AF4D66136E48C2B66EE70DE429FC9DF1
.data 0x000a1000 10,236 bytes 6,656 bytes 3.99 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE 6EF922EF7ADF7184DF84F428D85464DB
.rsrc 0x000a4000 296,172 bytes 296,448 bytes 1.91 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ 1F1954366C651C8CBA7CF4981FAB6C7E
.reloc 0x000ed000 26,000 bytes 26,112 bytes 6.72 (Compressed) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ BD27598504291E4BC9856A2B04F2F91E
Entropy Analysis Alert

2 section(s) with elevated entropy (≥6.5) - possible compression

Resource Analysis

▼
Total Resources: 12 (295,435 bytes)
Resource Type Count Total Size Percentage
RT_ICON 7 292,760 bytes
99.1%
RT_STRING 1 860 bytes
0.3%
RT_RCDATA 1 20 bytes
0%
RT_GROUP_ICON 1 104 bytes
0%
RT_VERSION 1 360 bytes
0.1%
RT_MANIFEST 1 1,331 bytes
0.5%

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.oa!s1 Removal

Gridinsoft has the capability to identify and eliminate Trojan.Win32.Downloader.oa!s1 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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