MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1c809aae258aaa9f029a80ed7b754eead202037eaa84b95c1ee9df2e49faf927. 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: 13


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1c809aae258aaa9f029a80ed7b754eead202037eaa84b95c1ee9df2e49faf927
SHA3-384 hash: dafcafc39948af1a9e1f5db1d08c5e55e1733c4d6f8eab5ce59bc60b8e263ff63d7ca7a0e91a82b75bff6098d963da41
SHA1 hash: 897506d9bba4c7d01defe2adc0a3b814eee88c64
MD5 hash: 6d83dfee0c83b2deaacb5ad5e761e49f
humanhash: delta-hotel-iowa-johnny
File name:IAENMAIL-A4-230704-0830-0003275.pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:338'344 bytes
First seen:2023-07-04 12:46:05 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 3abe302b6d9a1256e6a915429af4ffd2 (271 x GuLoader, 38 x Formbook, 25 x Loki)
ssdeep 6144:hjqbpfwsPyzqIIOeIpCzH1S4V+6eZ56RerE2XLFOZ3l//Q9SZ2xBttDEXpQvpTMr:eJyzq5ONpQ8Kw56RwzG1Y982RhQihTMr
Threatray 999 similar samples on MalwareBazaar
TLSH T1967412221783C4B2C79D0AB1C9E54AA986359D1C965261FB63917F2DFC333B1DD1E20E
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)
File icon (PE):PE icon
dhash icon 20660090a2a5d48e (1 x GuLoader)
Reporter malwarelabnet
Tags:AgentTesla exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-03-27T01:19:28Z
Valid to:2026-03-26T01:19:28Z
Serial number: 3fce59265c5924c27107499b31cc777bd7c54d68
Thumbprint Algorithm:SHA256
Thumbprint: c9e27c5a89174aafd0ffc8e33549b641979e7fe292179c37e34692f1072e2046
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
287
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
IAENMAIL-A4-230704-0830-0003275.pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-07-04 12:48:43 UTC
Tags:
agenttesla
Link:
https://app.any.run/tasks/dfb70c77-49aa-4b57-89d8-e619fead9ae5

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/406606/
Detection(s):
SecuriteInfo.com.Win32.SuspectCrc.17715.27324.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %AppData% subdirectories
Сreating synchronization primitives
Creating a process from a recently created file
Creating a process with a hidden window
Launching a process
Sending a custom TCP request
Modifying a system file
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/95513/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer control lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/64a414c72299d2688264a7e5/reports/aa8b6421-cdf9-4c5f-b3a5-597cc89c1cd7/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/1c809aae258aaa9f029a80ed7b754eead202037eaa84b95c1ee9df2e49faf927
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/1f0b2970-ab88-4fca-a499-3d435357a864
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
evad.troj.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1266594
Signature
Antivirus detection for URL or domain
Found suspicious powershell code related to unpacking or dynamic code loading
Initial sample is a PE file and has a suspicious name
May check the online IP address of the machine
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
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 Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses an obfuscated file name to hide its real file extension (double extension)
Very long command line found
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1266594 Sample: IAENMAIL-A4-230704-0830-000... Startdate: 04/07/2023 Architecture: WINDOWS Score: 100 25 googlehosted.l.googleusercontent.com 2->25 27 drive.google.com 2->27 29 3 other IPs or domains 2->29 41 Multi AV Scanner detection for domain / URL 2->41 43 Antivirus detection for URL or domain 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 5 other signatures 2->47 9 IAENMAIL-A4-230704-0830-0003275.pdf.exe 2 23 2->9         started        11 ByteCodeGenerator.exe 2->11         started        signatures3 process4 process5 13 powershell.exe 12 9->13         started        signatures6 57 Very long command line found 13->57 59 Found suspicious powershell code related to unpacking or dynamic code loading 13->59 16 powershell.exe 13 13->16         started        19 conhost.exe 13->19         started        process7 signatures8 37 Writes to foreign memory regions 16->37 39 Tries to detect Any.run 16->39 21 CasPol.exe 15 11 16->21         started        process9 dnsIp10 31 api4.ipify.org 64.185.227.156, 443, 50062 WEBNXUS United States 21->31 33 googlehosted.l.googleusercontent.com 142.250.181.225, 443, 50060 GOOGLEUS United States 21->33 35 drive.google.com 142.250.185.142, 443, 50058 GOOGLEUS United States 21->35 49 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 21->49 51 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 21->51 53 Tries to steal Mail credentials (via file / registry access) 21->53 55 2 other signatures 21->55 signatures11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1c809aae258aaa9f029a80ed7b754eead202037eaa84b95c1ee9df2e49faf927/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-07-04 12:47:06 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=dsajvlrfrkvj6au2qdwxw5ko5ljaea36vkclsxa65hps4sp27etq._file
Verdict:
unknown
Similar samples:
051101f45d03dac4583297cce0d708af562dedfa085b3d9dcfea40be2083e7ab
GuLoader
1769a8993a876094f9a4a9a7ca17ac3d669279178e32c097a3346825f982a2b1
GuLoader
30efd997c49aae97766539c72d72529b06f1e8522ea84e71758cde4ed1846921
GuLoader
529041b4abb84d9d85f97eb0a6fa6e26a5bf8c9f900316430134df6ce7a5a6ff
GuLoader
7d6e9247de0527fa4c0939c4f6e6726a35cb5f39492a7aeab5614ac1ab29b294
GuLoader
9b77dffb83a26f126a334f4dd9de9c8a21802a1b05de3067584ebfa25826f9fa
GuLoader
a2b5ddc4640236c4a5e09ae3418a1243d2ab37fc787999f8a3f8a3ec1f7deece
GuLoader
a88caf11b01cea311aca13b6e757a8974d5033e1acb8749b9d1951ed0d93d44c
GuLoader
ae7a2eab74a6dbeaa780094a1885f588405f0f8eda83910f14e22759d1f1b7aa
GuLoader
ec27e95180289cd7ca8ebfafc4a1ec973448dcda09892716324966ac95ce4a87
GuLoader
+ 989 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla collection keylogger spyware stealer trojan
Link:
https://tria.ge/reports/230704-pz7dmsef2s/
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
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Checks QEMU agent file
Checks computer location settings
AgentTesla
Malware Config
C2 Extraction:
https://api.telegram.org/bot2122434962:AAFqluKwJfwmfN8BZ9xq0IjlIijJbDmwbKs/
Unpacked files
SH256 hash:
1c809aae258aaa9f029a80ed7b754eead202037eaa84b95c1ee9df2e49faf927
MD5 hash:
6d83dfee0c83b2deaacb5ad5e761e49f
SHA1 hash:
897506d9bba4c7d01defe2adc0a3b814eee88c64
Link:
https://www.unpac.me/results/a6aca685-79ed-45de-9818-04b141bde79d/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/1c809aae258a/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

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/406606/

Comments