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Keygen.exe Ransomware Gandcrab Analysis

Updated 1 month ago
Checked by Malaware Check
keygen.exe

Technical Analysis

File Name keygen.exe
File Type
PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
Scanner Version 1.0.215.174
Database Version 2025-04-28 08:00:23 UTC
⚠

Ransom.Win32.Gandcrab.oa!s2

Malware family: Gandcrab

GandCrab ransomware operated from 2018 to 2019, using advanced techniques and widespread distribution methods. It caused significant impact across multiple sectors before decryption tools became available in 2021, reducing its operational effectiveness.
N/A
Detection Rate
146,944
File Size (bytes)
2025-04-28
Analysis Date

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File Identification

Hash Type Value Action
MD5
71b84c58b7d74c77bb626022c5b2c5c3
SHA1
48fff719da6e31a9de80bfe2737a13aab5f02d24
SHA256
8ba73dd9b2205c82757fc93d8a2ed1d67012816902ceba5feb0c38c5d65715e9
SHA512
73fff3cf96e99d5e4ed89cd06fa8006c4981c7f7adf1c21a7c89f0cc8dcaf19d0ed57126a99533522a88c7b0bf983112dca99a37fc1fb4ed4d1b939f075b19a7
ImpHash
c2d81ea0819442238ab715133c41964a

PE Analysis

Basic Information

▼
Icon
Hash: d73b81870c01d82491f790d51a3ccd01
Fuzzy: 6b39aaaca98fb23e1d17e9ba910911ea
dHash: cecad2c8caeaa2ce
Image Base 0x00400000
Entry Point 0x0054c410
Compilation Time 2009-11-03 15:57:12
Checksum 0x00000000 (Actual: 0x00032ad5)
OS Version 4.0
PEiD Signatures PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
Digital Signature No valid SignedData structure was found.
Imports 6 libraries
KERNEL32, comctl32, gdi32, msimg32, user32, winmm
Exports 0 functions
Resources 8 Resources
Sections 3 Sections

PE Sections

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Name Virtual Address Virtual Size Raw Size Entropy Characteristics MD5
UPX0 0x00001000 1,220,608 bytes 0 bytes 0.00 (Normal) IMAGE_SCN_CNT_UNINITIALIZED_DATA|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE D41D8CD98F00B204E9800998ECF8427E
UPX1 0x0012b000 139,264 bytes 136,704 bytes 7.85 (Packed/Encrypted) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE 36D560BC1D4882CF3164EC5ED1EA35C2
.rsrc 0x0014d000 12,288 bytes 9,216 bytes 5.56 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE B484D4FB764871C76B469D8B23A52FCA
Entropy Analysis Alert

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

Resource Analysis

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Total Resources: 8 (202,141 bytes)
Resource Type Count Total Size Percentage
RT_BITMAP 1 180,034 bytes
89.1%
RT_ICON 3 7,352 bytes
3.6%
RT_DIALOG 1 882 bytes
0.4%
RT_RCDATA 1 13,182 bytes
6.5%
RT_GROUP_ICON 1 48 bytes
0%
RT_MANIFEST 1 643 bytes
0.3%

Certificate Chain Analysis

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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.

Ransom.Win32.Gandcrab.oa!s2 Removal

Gridinsoft has the capability to identify and eliminate Ransom.Win32.Gandcrab.oa!s2 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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