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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef. 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: 16


Intelligence 16 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef
SHA3-384 hash: f35b5a8f20f603e65b3f3080ef53cc83b0a17ef159d6cc55dbcc246f85f403d80dff1de69ab25492dc209e1f2e527be3
SHA1 hash: 362e8143c54745ab48184ebee94fd462deb423b1
MD5 hash: 3ddc6875fab1c8465e6c5e5481574720
humanhash: ceiling-rugby-sink-montana
File name:Overdue Invoices.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:490'664 bytes
First seen:2026-01-19 15:06:04 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash e9c0657252137ac61c1eeeba4c021000 (55 x GuLoader, 26 x RedLineStealer, 17 x AgentTesla)
ssdeep 6144:G6dQC6a5KqBFftrh6pIDy6JLqbYgEh3tGOw6GE035XZJ/uvc38OENSarpWJLgjO6:JNBFftF6CDyZREhd8EiXbuRpSar0J0
Threatray 2'397 similar samples on MalwareBazaar
TLSH T127A40173634AACE2D65108724CB2E7A023F4BFD5495116473596FE3A2C322C79A1BDCE
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
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) (4504/4/1)
Magika pebin
dhash icon 1100f8f8e8f8f4d8 (5 x RemcosRAT, 2 x GuLoader)
Reporter adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Settimo
Issuer:Settimo
Algorithm:sha256WithRSAEncryption
Valid from:2025-12-18T02:29:39Z
Valid to:2026-12-18T02:29:39Z
Serial number: 336b61d7c453608db7e7cbe0d314157ba5d504ba
Thumbprint Algorithm:SHA256
Thumbprint: 17cf7830ed37968948389d1947701e6ff9fc3aa48196d623d482bbc7823e5dad
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
144
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Link:
https://research.acce.ciphertechsolutions.com/results/7141f279-f18d-4d18-880f-8aca25501cdd/
Malware family:
formbook
Create hunting rule
ID:
1
File name:
_ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef.exe
Verdict:
Malicious activity
Analysis date:
2026-01-19 15:41:00 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/9ae05984-2bc0-4126-a76f-48eeb2320373

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/49406/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=696e49f7bcad3327ec0672cd
Tags:
injection obfusc virus nsis
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole guloader installer installer installer-heuristic masquerade microsoft_visual_cc nsis overlay signed
Link:
https://www.filescan.io/uploads/696e493555805a763fe8d845/reports/a8316146-2124-40fd-8d6f-0cbb2ea6f06f/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-14T03:52:00Z UTC
Last seen:
2026-01-21T05:44:00Z UTC
Hits:
~100
Detections:
VHO:Trojan.NSIS.Makoob.gen Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb Trojan.NSIS.Makoob.sbe Trojan.NSIS.Makoob.sbb Trojan.NSIS.Makoob.sba HEUR:Trojan.Win32.Makoob.gen
Link:
https://opentip.kaspersky.com/ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/1828750a-82c1-4950-8c4f-eba10f855adf
Score:
94%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Link:
https://app.malva.re/file/3ddc6875fab1c8465e6c5e5481574720
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2026-01-14 11:01:01 UTC
File Type:
PE (Exe)
Extracted files:
12
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zjlpvsu46zqie35ggfd5ao7sdmpkoiq45zgc7tlolpcjezqxn7xq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
551863be2e92aa2d319a92cda72bc2123233ee3a7e965ee691fd70d88c21d772
GuLoader
70739509527d295d9c35471acb163d7769b08a3b4933cda1f3c7ae599727b4df
GuLoader
73ebbbaee3d34dbd005e2af6745c18b905713065b463f2e1f8d06a36dad616c3
GuLoader
a79144ac2441047775ba349433a8b27aed0c8087aae033e68fa21692412abef9
GuLoader
b0e8491d0558fe31d0e2f591e7c09beb20321b5551b008dec47da8c1b14c28ca
GuLoader
dc84fb042aae918d231122d7240437b112046c01319c68c68b2c017d4911f6ad
GuLoader
dd6d8363c2761f77948a54be192dbbe563d2da9dd8f922102547631ccbd05ebb
GuLoader
error
GuLoader
f13c3193eeef6dd61da5d1e5e3bbff931aab466b3078912463ebfebae5b43aae
GuLoader
fcbdcccd83183504ce0bec648d0ba34dde6f2e5dcc70783f45ac8bde0c9fcc5c
GuLoader
fe74b8f72c806ce6409697ad6908d312501e693cd97593d53293784e19fc883a
GuLoader
+ 2'387 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:b25f discovery installer rat spyware stealer trojan
Link:
https://tria.ge/reports/260119-sj9evafs2f/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/f699d578-f72f-47ae-9fc8-caf18bc30c4a
Unpacked files
SH256 hash:
ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef
MD5 hash:
3ddc6875fab1c8465e6c5e5481574720
SHA1 hash:
362e8143c54745ab48184ebee94fd462deb423b1
Link:
https://www.unpac.me/results/bb6e9e79-9eb5-4c41-9898-423fc6a25ec9/
SH256 hash:
8d4b1c275fd1cd0782a265080b56d1aec8d1c93edca5ef3b050d1d20d7b61f33
MD5 hash:
6e64e5d5f9498058a300b26b8741d9d5
SHA1 hash:
837ce28e5e02788da63a7f1d8f20207d2b0bf523
Link:
https://www.unpac.me/results/bb6e9e79-9eb5-4c41-9898-423fc6a25ec9/
SH256 hash:
ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7
MD5 hash:
0063d48afe5a0cdc02833145667b6641
SHA1 hash:
e7eb614805d183ecb1127c62decb1a6be1b4f7a8
Link:
https://www.unpac.me/results/bb6e9e79-9eb5-4c41-9898-423fc6a25ec9/
Parent samples :
5312214b15330113f6eab71565e1e3c7d1ee3b59daa6703c271aaf3b192e6809
02fca6ef5d9d8b1eb29f7ac8ea0573b504ea7f06c215e091791653b40fe1329a
cc53accc69b32c2507210ea70d1d56aa84dbe354a7f79577df180179ea797427
045a7318a9e2e550208c0c7e9fc805068df19fa73823ac3acaa049a46c4045ee
f2a883a0e4b01c72b0f063df3be5a0102e5c8fbaedc39c8d35c632b200599283
dffefbde27442b9095388b1871ffdc101c430b9a814138be4f962328a5b73fde
e0fb60da371912c158861c9660632d58e45cfcff12351cc9e03f497f319eb5de
904f69a4bed3844273cce1676e8920794815af4c1527e560bbc1bc44b5b8457a
3ab6ed7b7cb21244b34addf64ac6f64b1c38ee98236985511c4af47e8cc93cd4
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ca56faca9cf6/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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
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_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

File information

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

Malspam

GuLoader

Executable exe ca56faca9cf660826fa63147d03bf21b1ea7221cee4c2fcd6e5bc49266176fef

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/49406/

Comments