MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b75f0520f391edee50a5de8c5d0e65c544b8ed2da8323b42776fd0df788247d4. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b75f0520f391edee50a5de8c5d0e65c544b8ed2da8323b42776fd0df788247d4
SHA3-384 hash: d6009ee875025f170e8b93184d47b1ec27d4832af13a3904e9750856c83dabb13bbd07784f8bc792d9da959e41487402
SHA1 hash: a84297ae50baf4a8669fc1981b7bac2a4e53c26d
MD5 hash: 17a9f98acb4c9ce1bd3b67f637c35ec6
humanhash: paris-glucose-three-low
File name:Confirmación de Cita solicitada.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:701'928 bytes
First seen:2022-07-21 08:32:11 UTC
Last seen:2022-07-21 09:42:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 5f0c714c36e6cc016b3a1f4bc86559e4 (199 x GuLoader, 14 x Formbook, 4 x AgentTesla)
ssdeep 6144:z1ssjoruNxdoWcofJfBwud/6D9PkzZgrihLqDtbaUS9UKqagyDWjLhZrcs4r23h:SsMQEAf3+9PmZgztbaUA+agQ4htcsb
TLSH T173E409655532B807C1C78A70F53092F29F606D9494F3885F26E1FB4AED7FBA10A27887
TrID 48.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
16.4% (.EXE) Win64 Executable (generic) (10523/12/4)
10.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.0% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 8866e6cca4b6b04c (5 x GuLoader)
Reporter malwarelabnet
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Affaldsmngdens Nonpacifist
Issuer:Affaldsmngdens Nonpacifist
Algorithm:sha256WithRSAEncryption
Valid from:2022-03-22T13:35:13Z
Valid to:2025-03-21T13:35:13Z
Serial number: -782809bfcc81a974
Thumbprint Algorithm:SHA256
Thumbprint: 222687fb4e44b22ad44c4c7560a9d65fe149de74d0214fbf64b1c812bace0025
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
261
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Confirmación de Cita solicitada.rar
Verdict:
Malicious activity
Analysis date:
2022-07-21 06:52:05 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/909241e5-0485-4b44-9a08-740f220c2eb8

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/293126/
Detection(s):
SecuriteInfo.com.VHO.Packed.NSIS.Krynis.gen.5747.5514.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Delayed reading of the file
Sending a custom TCP request
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/26917/overview
Behaviour
MalwareBazaar
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
buer overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/62d90fba00d6e9040b584026/reports/df043e68-00ed-4e61-8cda-e4f507641341/overview
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:
Malicious
Link:
https://analyze.intezer.com/analyses/6e327501-f10b-4974-84c3-04908b890b7f
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1038463
Signature
C2 URLs / IPs found in malware configuration
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
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 harvest and steal ftp login credentials
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 AgentTesla
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 670957 Sample: Confirmaci#U00f3n de Cita s... Startdate: 21/07/2022 Architecture: WINDOWS Score: 100 22 mail.hemegas.es 2->22 24 hemegas.es 2->24 26 3 other IPs or domains 2->26 34 Multi AV Scanner detection for submitted file 2->34 36 Yara detected GuLoader 2->36 38 Yara detected AgentTesla 2->38 40 2 other signatures 2->40 8 Confirmaci#U00f3n de Cita solicitada.exe 6 44 2->8         started        signatures3 process4 file5 20 C:\Users\user\AppData\Local\...\System.dll, PE32 8->20 dropped 42 Writes to foreign memory regions 8->42 44 Tries to detect Any.run 8->44 12 CasPol.exe 11 8->12         started        16 CasPol.exe 8->16         started        signatures6 process7 dnsIp8 28 hemegas.es 37.59.226.102, 49756, 587 OVHFR France 12->28 30 drive.google.com 142.250.185.142, 443, 49753 GOOGLEUS United States 12->30 32 googlehosted.l.googleusercontent.com 142.250.186.97, 443, 49754 GOOGLEUS United States 12->32 46 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->46 48 Tries to steal Mail credentials (via file / registry access) 12->48 50 Tries to harvest and steal ftp login credentials 12->50 56 2 other signatures 12->56 18 conhost.exe 12->18         started        52 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 16->52 54 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 16->54 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b75f0520f391edee50a5de8c5d0e65c544b8ed2da8323b42776fd0df788247d4/
Threat name:
Win32.Packed.Krynis
Create hunting rule
Status:
Malicious
First seen:
2022-07-21 02:20:07 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
7 of 26 (26.92%)
Threat level:
  1/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w5pqkihtshw64uff32gf2dtfyvclr3jnvazdwqtxn7in66eci7ka._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery
Link:
https://tria.ge/reports/220721-kfvhhsedhm/
Behaviour
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Checks installed software on the system
Loads dropped DLL
Unpacked files
SH256 hash:
c7a20bcaa0197aedddc8e4797bbb33fdf70d980f5e83c203d148121c2106d917
MD5 hash:
792b6f86e296d3904285b2bf67ccd7e0
SHA1 hash:
966b16f84697552747e0ddd19a4ba8ab5083af31
Link:
https://www.unpac.me/results/a0ed44b4-7c9b-4d03-9f12-c2017474c57b/
SH256 hash:
b75f0520f391edee50a5de8c5d0e65c544b8ed2da8323b42776fd0df788247d4
MD5 hash:
17a9f98acb4c9ce1bd3b67f637c35ec6
SHA1 hash:
a84297ae50baf4a8669fc1981b7bac2a4e53c26d
Link:
https://www.unpac.me/results/a0ed44b4-7c9b-4d03-9f12-c2017474c57b/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/b75f0520f391edee50a5de8c5d0e65c544b8ed2da8323b42776fd0df788247d4

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

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/293126/

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