MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 defaa7299868b133e17be2d9e306ffe90b6fee35f5efdc6b234593f5321d9ee5. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: defaa7299868b133e17be2d9e306ffe90b6fee35f5efdc6b234593f5321d9ee5
SHA3-384 hash: 1a36448e393861d718fc15a33538a30238dc2236bf565d62d01cfc0fc1a9fba067c2c8acfc09cc20060234e41856a34b
SHA1 hash: d210967af8b70a6bd65497d01be792504b8b399c
MD5 hash: e82d84a9b47dad83382f58975cdd983c
humanhash: table-gee-batman-glucose
File name:Certificado FNMT.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:770'268 bytes
First seen:2023-10-10 12:49:13 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 671f2a1f8aee14d336bab98fea93d734 (198 x GuLoader, 4 x Formbook, 4 x RemcosRAT)
ssdeep 12288:M0f2JEhxe+fYm6bkAxfRE+K/8eY3uWe5M055BQeweXtTYVNPvwfj9HBrRYzzpTe:M0foEhxe+f/gkMLK/5KhqM05IE9T2PoL
Threatray 299 similar samples on MalwareBazaar
TLSH T107F42302B6A4EC27D42D02738DBBE5EC6FB8BD5A5DE1024B37A4772E2C77641B90D205
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)
Reporter malwarelabnet
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
285
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
f3f99cff-bc6e-1d09-287b-c4b400e267e5.eml
Verdict:
Malicious activity
Analysis date:
2023-10-10 11:39:56 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/4880bd0f-5115-463f-b03d-f559074392ef

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.Malware-gen.23809.11223.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Creating a file
Delayed reading of the file
Searching for the window
Creating a file in the %temp% subdirectories
Searching for the Windows task manager window
Launching a process
Creating a process with a hidden window
Sending a custom TCP request
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin overlay packed remcos shell32 threat virus
Link:
https://www.filescan.io/uploads/6525487b1e07d7e1e9bd0452/reports/bfef938d-9463-44e9-811a-4e01f5d6b8ff/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/defaa7299868b133e17be2d9e306ffe90b6fee35f5efdc6b234593f5321d9ee5
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.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/c9b10df1-ac42-40b5-8163-b00ba47aa45f
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
84 / 100
Link:
https://www.joesandbox.com/analysis/1322913
Signature
Maps a DLL or memory area into another process
Mass process execution to delay analysis
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1322913 Sample: Certificado_FNMT.exe Startdate: 10/10/2023 Architecture: WINDOWS Score: 84 43 googlehosted.l.googleusercontent.com 2->43 45 drive.google.com 2->45 47 3 other IPs or domains 2->47 55 Multi AV Scanner detection for submitted file 2->55 57 Yara detected GuLoader 2->57 9 Certificado_FNMT.exe 1 43 2->9         started        signatures3 process4 file5 39 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 9->39 dropped 41 C:\Users\user\AppData\Local\...\System.dll, PE32 9->41 dropped 59 Writes to foreign memory regions 9->59 61 Mass process execution to delay analysis 9->61 63 Maps a DLL or memory area into another process 9->63 13 CasPol.exe 9->13         started        17 powershell.exe 9->17         started        19 powershell.exe 9->19         started        21 78 other processes 9->21 signatures6 process7 dnsIp8 49 api4.ipify.org 104.237.62.212, 443, 49762 WEBNXUS United States 13->49 51 googlehosted.l.googleusercontent.com 142.250.72.161, 443, 49761 GOOGLEUS United States 13->51 53 drive.google.com 142.251.40.46, 443, 49760 GOOGLEUS United States 13->53 65 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 13->65 67 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 13->67 69 Tries to steal Mail credentials (via file / registry access) 13->69 71 Tries to harvest and steal browser information (history, passwords, etc) 13->71 23 conhost.exe 17->23         started        25 conhost.exe 19->25         started        27 conhost.exe 21->27         started        29 conhost.exe 21->29         started        31 conhost.exe 21->31         started        33 75 other processes 21->33 signatures9 process10 process11 35 MpCmdRun.exe 23->35         started        37 conhost.exe 25->37         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/defaa7299868b133e17be2d9e306ffe90b6fee35f5efdc6b234593f5321d9ee5/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-10-10 00:23:27 UTC
File Type:
PE (Exe)
Extracted files:
9
AV detection:
16 of 22 (72.73%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=335kokmyncythyl34lm6gbx75efw73rv6xx5y2zdiwj7kmq5t3sq._file
Verdict:
malicious
Similar samples:
030ca745bb45c5cba7e0dc933c2f36aa7c27a3716929027e1b9aa64c6ed60f81
GuLoader
08617ac03620863f2105bbb16f26c851a360b2c277c77b80bba81356ad5b9900
GuLoader
09d071d33e9aedd10788a8fb405416f40be21301f741e1c2690007cfad11a219
GuLoader
2123ed455056e9b004781b40a5210e0b9d10bac6fbc49ce063b2b9209eeb508b
GuLoader
6eeeb05646dc1c6db8f8fb818a3148548100334ec73108506e5434e5f18b8888
GuLoader
6f76a9a4473f09b8496ad65ca63ffec2c1a567417e94ca082eb3f5de82137248
GuLoader
87a8c6294c7bfeece375857edf3b1a16a2a7c1d42fc9f2463e31f45b36135ef1
GuLoader
96438d0b3067337c39266737d24db93641628d21e661e517568cdd31020703d5
GuLoader
a71c9e5f6f83bccde192cff4982c7483ceaa6c3f9e6b309f0c36cedfccf3e837
GuLoader
f597a169eff0fcb60de34630635da598c0b90ff4c96764844d0aebca18fa3988
GuLoader
+ 289 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/231010-p2xbfsde6x/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Loads dropped DLL
Unpacked files
SH256 hash:
bcb93204bd1854d0c34fa30883bab51f6813ab32abf7fb7d4aeed21d71f6af87
MD5 hash:
6c881f00ba860b17821d8813aa34dbc6
SHA1 hash:
0e5a1e09b1ce1bc758d6977b913a8d9ccbe52a13
Link:
https://www.unpac.me/results/e9663c69-76cb-4d33-aa4a-38828b8cd3a7/
SH256 hash:
832da3cff792135ecb98f44c387bea3a8e2e9bd096b917303ca8b9dc71d60365
MD5 hash:
50a9396a761bf245ed4df1b08782d6f2
SHA1 hash:
e01a99100e91801abe074341b0c77cca6220f0bd
Link:
https://www.unpac.me/results/e9663c69-76cb-4d33-aa4a-38828b8cd3a7/
SH256 hash:
dcfd594bee64b7779fde26879a47cc5c5bfabeb3ed7752013c0ef4d045e601de
MD5 hash:
0b395e1ca2caa72c1a44517c0cd832fc
SHA1 hash:
d51d44e4e0dc1f78acd9001f219a5770ce5d4ece
Link:
https://www.unpac.me/results/e9663c69-76cb-4d33-aa4a-38828b8cd3a7/
SH256 hash:
defaa7299868b133e17be2d9e306ffe90b6fee35f5efdc6b234593f5321d9ee5
MD5 hash:
e82d84a9b47dad83382f58975cdd983c
SHA1 hash:
d210967af8b70a6bd65497d01be792504b8b399c
Link:
https://www.unpac.me/results/e9663c69-76cb-4d33-aa4a-38828b8cd3a7/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/defaa7299868b133e17be2d9e306ffe90b6fee35f5efdc6b234593f5321d9ee5

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:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns

File information

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

Comments