MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f3b8bf70686bcddcd2e2a6c1abae4de80f03bfa98b8087763ef3bf5276d1cc90. 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: 9


Intelligence 9 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f3b8bf70686bcddcd2e2a6c1abae4de80f03bfa98b8087763ef3bf5276d1cc90
SHA3-384 hash: e0a5fb79857043985536bced7137208d8b27c433ff6f5e738b5e549c44f654f115f04280a0283990aed6459327d7d296
SHA1 hash: 573b2a179334951572b5f09f0fdc64929105b06c
MD5 hash: efbcd56b2a63bc53cc2ad355f414bcdf
humanhash: music-winter-timing-tennessee
File name:Invoice and PL xls.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:839'144 bytes
First seen:2023-05-16 10:22:33 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (300 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 12288:jX/c1QavcW/wo9EytmGPuzG0qGJvmbo8sTi+cduT:jPc1FvF4o9rtmTzHvELCcdG
Threatray 765 similar samples on MalwareBazaar
TLSH T17C059E62A94059C4F69909F590ADB87842DF7E0A98B4B11D3E447122FFF21E20C7ED9F
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
dhash icon 83e4ecebbbe66689 (3 x GuLoader)
Reporter lowmal3
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-05-16T05:08:49Z
Valid to:2025-05-15T05:08:49Z
Serial number: 5c671dddee4e9b5d8d75af5a5e48803a575881af
Thumbprint Algorithm:SHA256
Thumbprint: c3833da80a79be6cea8fb6f443a7c752badb5d02a81849dfb7e5f088fbe71e3c
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
246
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Invoice and PL xls.exe
Verdict:
Malicious activity
Analysis date:
2023-05-16 10:23:54 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d029895f-97c0-4de3-9bbe-396a63ebc161

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/390370/
Detection(s):
SecuriteInfo.com.BackDoor.Siggen2.2488.26461.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% subdirectories
Delayed reading of the file
Sending a custom TCP request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer comodo guloader overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6463598999100c283cd25185/reports/ca349626-15c6-462d-912c-60a3392b225f/overview
Verdict:
Malicious
Labled as:
TR/AD.NsisInject
Link:
https://www.hybrid-analysis.com/sample/f3b8bf70686bcddcd2e2a6c1abae4de80f03bfa98b8087763ef3bf5276d1cc90
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/8d2ba1ba-064b-430a-a2c3-6f55955275ce
Result
Threat name:
GuLoader, Snake Keylogger
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1234352
Signature
Found malware configuration
Initial sample is a PE file and has a suspicious name
May check the online IP address of the machine
Snort IDS alert for network traffic
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Snake Keylogger
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f3b8bf70686bcddcd2e2a6c1abae4de80f03bfa98b8087763ef3bf5276d1cc90/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-05-16 02:40:13 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
11 of 20 (55.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6o4l64dinpg5zuxcu3a2xlsn5ahqhp5jroaio5r66o7ve5wrzsia._file
Verdict:
unknown
Similar samples:
0e439b622658ab71228c7388ec456c7baf041046d7eff1a37bc9c02177c324ed
GuLoader
34344e93916303db50c77fa67b7c3f068a7b7537b14aaf2f1fdd81ba72f06035
GuLoader
629156764548d3bdbc062de11f6ad819bb0d7d166aac339b04674861df522206
GuLoader
6619a23606037c409d8a806d59156f73cc1493462da007f59002da7c1a9892e6
GuLoader
723ff97e6559f6558c288ca693898592a21aab28c003883ca13b81667d7e3aef
GuLoader
7d6e9247de0527fa4c0939c4f6e6726a35cb5f39492a7aeab5614ac1ab29b294
GuLoader
9eddf41c4a04d6f1a7510480bab531956b0d5efc55e43f2af52255bb8c2d09c9
GuLoader
b8ac779bad0064cb5e6371e1b1e745bbf9a7751f95d77729c2f461c5a2fc185e
GuLoader
bb6b9431e289c8cca7a359c5e685a81cba52cf86506cfb28bf7fe6c6df8cbc22
GuLoader
cba27621d4b7c92fd50bf37135e150b45097ca9306061ed7049f802047bbd1b9
GuLoader
+ 755 additional samples on MalwareBazaar
Result
Malware family:
snakekeylogger
Create hunting rule
Score:
  10/10
Tags:
family:snakekeylogger collection keylogger stealer
Link:
https://tria.ge/reports/230516-meszeahc4w/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
Program crash
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Looks up external IP address via web service
Checks QEMU agent file
Loads dropped DLL
Snake Keylogger
Snake Keylogger payload
Unpacked files
SH256 hash:
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
MD5 hash:
3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 hash:
fe582246792774c2c9dd15639ffa0aca90d6fd0b
Link:
https://www.unpac.me/results/674a272e-0a53-4231-829a-0a8a3b934d31/
SH256 hash:
f3b8bf70686bcddcd2e2a6c1abae4de80f03bfa98b8087763ef3bf5276d1cc90
MD5 hash:
efbcd56b2a63bc53cc2ad355f414bcdf
SHA1 hash:
573b2a179334951572b5f09f0fdc64929105b06c
Link:
https://www.unpac.me/results/674a272e-0a53-4231-829a-0a8a3b934d31/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/f3b8bf70686b/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/390370/

Comments