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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2. 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: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2
SHA3-384 hash: d7d73ecdd20f7cc5dface043d969dd8866c3617852424b0517993d4b2ba56b2e2543001d3f995356df772036a34bd54e
SHA1 hash: 4f49b045fe3b043d5f8541939ef66d611094b10d
MD5 hash: dbac614bdf786dd5741aaab9ea8006d7
humanhash: violet-nitrogen-magnesium-charlie
File name:documents 53 ACH 775-53 ABM 912.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'201'600 bytes
First seen:2024-02-12 16:37:45 UTC
Last seen:2024-02-12 18:36:07 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (419 x GuLoader, 63 x RemcosRAT, 52 x AgentTesla)
ssdeep 24576:KS5HuM8IqoMzMxDHEHsGhXwy54j3BjqgMQUWhypBR:f55XOHsG/54j3ZftUNBR
TLSH T16F451202BE2CC4CAD52D857D4C63CAA22EA23D36D684165631FCFB2F6C71517150FEAA
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) (4504/4/1)
File icon (PE):PE icon
dhash icon a40c71f8d0e1308f (2 x GuLoader)
Reporter lowmal3
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Aerobiosis
Issuer:Aerobiosis
Algorithm:sha256WithRSAEncryption
Valid from:2023-02-27T00:44:02Z
Valid to:2026-02-26T00:44:02Z
Serial number: 06c35625df699462e5c6a243e423c770f0577446
Thumbprint Algorithm:SHA256
Thumbprint: a9cd57036c470b2a87470632726c2813805c605f758d3bea9ec8ac1b5b963dad
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
323
Origin country :
DE DE
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/475869/
Detection(s):
SecuriteInfo.com.Win32.Malware-gen.13027.7965.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/65ca496b90a5367ac0c1c906/reports/f78a241f-5a85-4a45-b8bc-f0d773934f9a/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/504c517f-2566-45be-9ea5-93125744406a
Result
Threat name:
GuLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad.phis.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1390962
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Installs a global keyboard hook
Maps a DLL or memory area into another process
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Wab/Wabmig Unusual Parent Or Child Processes
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1390962 Sample: documents 53 ACH 775-53 ABM... Startdate: 12/02/2024 Architecture: WINDOWS Score: 100 32 learfo55ozj01.duckdns.org 2->32 34 geoplugin.net 2->34 36 2 other IPs or domains 2->36 50 Found malware configuration 2->50 52 Antivirus detection for dropped file 2->52 54 Antivirus / Scanner detection for submitted sample 2->54 58 9 other signatures 2->58 8 documents 53 ACH 775-53 ABM 912.exe 14 61 2->8         started        signatures3 56 Uses dynamic DNS services 32->56 process4 file5 26 C:\Users\user\AppData\Local\...\System.dll, PE32 8->26 dropped 60 Writes to foreign memory regions 8->60 12 wab.exe 4 17 8->12         started        signatures6 process7 dnsIp8 38 learfo55ozj01.duckdns.org 193.222.96.21, 29871, 50213, 50214 SWISSCOMSwisscomSwitzerlandLtdCH Germany 12->38 40 drive.usercontent.google.com 142.250.191.65, 443, 50212 GOOGLEUS United States 12->40 42 2 other IPs or domains 12->42 28 C:\Users\user\AppData\...\kronprinserne.exe, PE32 12->28 dropped 30 C:\Users\user\AppData\Roaming\mqerms.dat, data 12->30 dropped 62 Maps a DLL or memory area into another process 12->62 64 Installs a global keyboard hook 12->64 17 wab.exe 1 12->17         started        20 wab.exe 1 12->20         started        22 wab.exe 2 12->22         started        24 wab.exe 12->24         started        file9 signatures10 process11 signatures12 44 Tries to steal Instant Messenger accounts or passwords 17->44 46 Tries to harvest and steal browser information (history, passwords, etc) 17->46 48 Tries to steal Mail credentials (via file / registry access) 20->48
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Malicious
First seen:
2024-02-12 12:31:51 UTC
File Type:
PE (Exe)
Extracted files:
14
AV detection:
12 of 23 (52.17%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=g26uqhcpudebozvenvd5yr55kogcxp4revajf7tpls7kdu54wtja._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader persistence
Link:
https://tria.ge/reports/240212-t5c47sbh37/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
MD5 hash:
17ed1c86bd67e78ade4712be48a7d2bd
SHA1 hash:
1cc9fe86d6d6030b4dae45ecddce5907991c01a0
Link:
https://www.unpac.me/results/8ef49cdc-e5c7-42af-91d4-241eaf0e9c51/
SH256 hash:
36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2
MD5 hash:
dbac614bdf786dd5741aaab9ea8006d7
SHA1 hash:
4f49b045fe3b043d5f8541939ef66d611094b10d
Link:
https://www.unpac.me/results/8ef49cdc-e5c7-42af-91d4-241eaf0e9c51/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/36bd481c4fa0/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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
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.

Malspam

GuLoader

Executable exe 36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/475869/

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