MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f8abb401812eafff1ca24fbafc67d5cdb34ba384da284b55d5350a5300fb7757. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


GuLoader


Vendor detections: 8


Intelligence 8 IOCs YARA File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f8abb401812eafff1ca24fbafc67d5cdb34ba384da284b55d5350a5300fb7757
SHA3-384 hash: a00334ffc599f9f8127a389429ef0b06807b4fb6712ec52bcaae7f00c681b040940453bec3f78458dec7dae478cdf971
SHA1 hash: eeaba79a2d490544ccf4c75f93e6456ab474f800
MD5 hash: c82d1d8b8fc5cbbf8ee05bee229a3a76
humanhash: bluebird-six-diet-illinois
File name:c82d1d8b8fc5cbbf8ee05bee229a3a76.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:449'522 bytes
First seen:2021-04-19 17:23:04 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 98f67c550a7da65513e63ffd998f6b2e (60 x Worm.Mofksys, 21 x SnakeKeylogger, 13 x MassLogger)
ssdeep 12288:zENN+T5xYrllrU7QY6AIA8pEifG4yeZAXJPAi6KoD0FsjOY/lmYgt8cJKoONZIfQ:Z5xolYQY6AopEifG4yeZAXJPAi6KoD0Y
TLSH 31A46227FA45312AD18A6CF07416B5AB73152F2956405A7F62C0EFE8F070993B9E870F
Reporter abuse_ch
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
207
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c82d1d8b8fc5cbbf8ee05bee229a3a76.exe
Verdict:
Suspicious activity
Analysis date:
2021-04-19 17:48:04 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/8a7eb44a-3c71-46b7-bedc-8177a92bea14

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Create hunting rule
Link:
https://www.capesandbox.com/analysis/138672/
Detection(s):
PUA.Win.Packer.ProtectSharewar-2
Create hunting rule

PUA.Win.Packer.ProtectSharewar-3
Create hunting rule

Win.Trojan.VBGeneric-6735885-0
Create hunting rule

Win.Virus.Sality-6747602-0
Create hunting rule

Win.Malware.Swisyn-6803865-0
Create hunting rule

Win.Malware.Swisyn-7610494-0
Create hunting rule

Win.Virus.Sality-6335700-2
Create hunting rule

Win.Trojan.Kazy-304
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Creating a file in the Windows subdirectories
Enabling the 'hidden' option for recently created files
Setting a keyboard event handler
Setting a global event handler
Creating a file in the %AppData% directory
Sending a UDP request
Setting a single autorun event
Launching the process to create tasks for the scheduler
Enabling autorun
Enabling a "Do not show hidden files" option
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
rans.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/687445
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Creates an undocumented autostart registry key
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files with benign system names
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Potential malicious icon found
System process connects to network (likely due to code injection or exploit)
Uses schtasks.exe or at.exe to add and modify task schedules
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 392670 Sample: kKXNnqwfr5.exe Startdate: 19/04/2021 Architecture: WINDOWS Score: 100 82 Potential malicious icon found 2->82 84 Malicious sample detected (through community Yara rule) 2->84 86 Antivirus detection for dropped file 2->86 88 4 other signatures 2->88 11 kKXNnqwfr5.exe 1 4 2->11         started        15 svchost.exe 2->15         started        process3 dnsIp4 66 C:\Users\user\AppData\Local\icsys.icn.exe, PE32 11->66 dropped 68 C:\Users\user\Desktop\kkxnnqwfr5.exe, PE32 11->68 dropped 116 Installs a global keyboard hook 11->116 18 icsys.icn.exe 3 11->18         started        22 kkxnnqwfr5.exe 11->22         started        80 127.0.0.1 unknown unknown 15->80 70 C:\ProgramData\Microsoft70etwork\...\qmgr.jfm, DOS 15->70 dropped file5 signatures6 process7 file8 60 C:\Windows\System\explorer.exe, PE32 18->60 dropped 98 Antivirus detection for dropped file 18->98 100 Machine Learning detection for dropped file 18->100 102 Drops executables to the windows directory (C:\Windows) and starts them 18->102 104 2 other signatures 18->104 24 explorer.exe 3 17 18->24         started        signatures9 process10 dnsIp11 74 vccmd03.googlecode.com 24->74 76 vccmd02.googlecode.com 24->76 78 5 other IPs or domains 24->78 62 C:\Windows\System\spoolsv.exe, PE32 24->62 dropped 64 C:\Users\user\AppData\Roaming\mrsys.exe, PE32 24->64 dropped 108 Antivirus detection for dropped file 24->108 110 System process connects to network (likely due to code injection or exploit) 24->110 112 Creates an undocumented autostart registry key 24->112 114 3 other signatures 24->114 29 spoolsv.exe 2 24->29         started        file12 signatures13 process14 file15 72 C:\Windows\System\svchost.exe, PE32 29->72 dropped 118 Antivirus detection for dropped file 29->118 120 Machine Learning detection for dropped file 29->120 122 Drops executables to the windows directory (C:\Windows) and starts them 29->122 124 2 other signatures 29->124 33 svchost.exe 3 3 29->33         started        signatures16 process17 file18 58 C:\Users\user\AppData\Local\stsys.exe, PE32 33->58 dropped 90 Antivirus detection for dropped file 33->90 92 Machine Learning detection for dropped file 33->92 94 Drops executables to the windows directory (C:\Windows) and starts them 33->94 96 2 other signatures 33->96 37 spoolsv.exe 1 33->37         started        40 at.exe 1 33->40         started        42 at.exe 1 33->42         started        44 13 other processes 33->44 signatures19 process20 signatures21 106 Installs a global keyboard hook 37->106 46 conhost.exe 40->46         started        48 conhost.exe 42->48         started        50 conhost.exe 44->50         started        52 conhost.exe 44->52         started        54 conhost.exe 44->54         started        56 9 other processes 44->56 process22
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f8abb401812eafff1ca24fbafc67d5cdb34ba384da284b55d5350a5300fb7757/
Gathering data
Verdict:
malicious
Label(s):
avemaria
Create hunting rule
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader evasion guloader persistence
Link:
https://tria.ge/reports/210419-a7xg11zm96/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Adds Run key to start application
Executes dropped EXE
Modifies Installed Components in the registry
Guloader Payload
Guloader,Cloudeye
Modifies WinLogon for persistence
Modifies visiblity of hidden/system files in Explorer
Please note that we are no longer able to provide a coverage score for Virus Total.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

GuLoader

Executable exe f8abb401812eafff1ca24fbafc67d5cdb34ba384da284b55d5350a5300fb7757

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1107970/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/138672/

Comments


Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-04-19 18:19:27 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0001.025] Anti-Behavioral Analysis::Software Breakpoints
1) [C0002.014] Communication Micro-objective::Read Header::HTTP Communication
2) [C0019] Data Micro-objective::Check String
3) [B0023] Execution::Install Additional Program