MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 43a98f8be897de5d3fd626871ae8d3a4add5461ddd09ec83db27c8ec5e6d793e. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 43a98f8be897de5d3fd626871ae8d3a4add5461ddd09ec83db27c8ec5e6d793e
SHA3-384 hash: bff6e9452e6d4cbe474b3d0dfe46d2e042bc239b8cfc212b23608e9e23c3c00b64e3adb7b56517f09a91cacabad9549d
SHA1 hash: 04cff1587def4668543115a515f90d90fdb19331
MD5 hash: c8a0fcff0f8f92d80e1a7d855c7d8b48
humanhash: batman-sodium-neptune-paris
File name:Potwierdzenie operacji iPKO biznes 2023.09.26.pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'283'752 bytes
First seen:2023-09-26 11:51:20 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 6e7f9a29f2c85394521a08b9f31f6275 (278 x GuLoader, 44 x RemcosRAT, 40 x VIPKeylogger)
ssdeep 24576:L3izvEECMDCEYRhIHHzzdPKM07dwCIg9ad15BLEQlD/I2:L3NEfzHzBPP076Ct9U15BAQlD/I2
Threatray 5'675 similar samples on MalwareBazaar
TLSH T14955338271008177FF776232583A6F3F26A32D261E50F66A5BA5BD4FD4321E08E6B447
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 fc9adca8a8b494de (2 x GuLoader, 1 x AgentTesla)
Reporter Anonymous
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-12-08T07:47:47Z
Valid to:2025-12-07T07:47:47Z
Serial number: 423043f49998b4dcdf3b850bb57234896ab09d05
Thumbprint Algorithm:SHA256
Thumbprint: 11e2384d4c4567effb39694f007c2d6edb5c8806dde63c70cba7b1244ecc925d
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
288
Origin country :
PL PL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Potwierdzenie operacji iPKO biznes 2023.09.26.pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-09-26 11:51:35 UTC
Tags:
stealer
Link:
https://app.any.run/tasks/d2ad912a-2d2a-474c-a2b4-13b61947c235

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/451257/
Detection(s):
SecuriteInfo.com.Win32.Malware-gen.1263.27348.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Searching for the window
Searching for the Windows task manager window
Creating a process from a recently created file
Sending a custom TCP request
Sending an HTTP GET request
Launching a process
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/6512c5e3f1b40cb0d622a775/reports/610bd104-0c7d-46d6-b050-b48cc2762acf/overview
Verdict:
Suspicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/43a98f8be897de5d3fd626871ae8d3a4add5461ddd09ec83db27c8ec5e6d793e
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/8fc45780-1f8f-44ed-8dba-44d1688d0471
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1314465
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
Maps a DLL or memory area into another process
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Suspicious powershell command line found
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)
Very long command line found
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1314465 Sample: Potwierdzenie_operacji_iPKO... Startdate: 26/09/2023 Architecture: WINDOWS Score: 100 35 Antivirus detection for URL or domain 2->35 37 Yara detected GuLoader 2->37 39 Initial sample is a PE file and has a suspicious name 2->39 8 Potwierdzenie_operacji_iPKO_biznes_2023.09.26.pdf.exe 1 47 2->8         started        process3 file4 23 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 8->23 dropped 25 C:\Users\user\AppData\Local\...\nsDialogs.dll, PE32 8->25 dropped 27 C:\Users\user\AppData\Local\...\BgImage.dll, PE32 8->27 dropped 11 powershell.exe 12 8->11         started        process5 signatures6 49 Suspicious powershell command line found 11->49 51 Very long command line found 11->51 53 Found suspicious powershell code related to unpacking or dynamic code loading 11->53 14 powershell.exe 13 11->14         started        17 conhost.exe 11->17         started        process7 signatures8 55 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 14->55 57 Writes to foreign memory regions 14->57 59 Tries to detect Any.run 14->59 61 Maps a DLL or memory area into another process 14->61 19 CasPol.exe 10 14->19         started        process9 dnsIp10 29 drive.google.com 142.250.189.142, 443, 49789 GOOGLEUS United States 19->29 31 googlehosted.l.googleusercontent.com 192.178.50.65, 443, 49790 GOOGLEUS United States 19->31 33 3 other IPs or domains 19->33 41 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->41 43 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 19->43 45 Tries to steal Mail credentials (via file / registry access) 19->45 47 2 other signatures 19->47 signatures11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/43a98f8be897de5d3fd626871ae8d3a4add5461ddd09ec83db27c8ec5e6d793e/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2023-09-26 11:52:06 UTC
File Type:
PE (Exe)
Extracted files:
18
AV detection:
11 of 23 (47.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=iouy7c7is7pf2p6we2drv2gtusw5krq53ue6za63e7eoyxtnpe7a._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
169b591d42ac6dac4d0c5b803e6c4edcab60608f0983a8334339857e4a7588ee
GuLoader
209521dc08b1186e9ac56e1d4fe3b30e20bd5f818b9391b779affd531258a100
GuLoader
2e819cc0b472a032d6554bbdd89d014ef7e294870d5ea6cfe8c3e5a31072e2ba
GuLoader
602c4a00381adeeeaccbf4d58fc095e8e9e5af92badd8c6c4b3a6c374e17c3f9
GuLoader
69d141096955a35ede46b91e97129df4d8faead0e19c9b0badf180b7b0c8600f
GuLoader
84e985ab847a98edb2a6be51a3f62f1743c12a088b0f2e89ef4798c24aa775e8
GuLoader
a9cb56006e0f08d147eb1aa68eab06ca2663ed3c7866bb110c5cae06fbf4768f
GuLoader
e0bf87c8ef8c048b6245ada3bf252c6de8ee83c8b2bcd293929eb83ea21073ba
GuLoader
+ 5'665 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/230926-n1qa3sad45/
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
Checks QEMU agent file
Loads dropped DLL
AgentTesla
Unpacked files
SH256 hash:
73abbc57661987e7a0aa7e43f6d7dcff63a74615d3b731d94891b05e0e19adcb
MD5 hash:
e2834a37c23a5c487b6e3a55eb95dd8a
SHA1 hash:
2ebc683fe079a8b0081283fd4adfff82f52dfa4d
Link:
https://www.unpac.me/results/0248b08a-ca56-4589-b8ed-ee68d7fb5bd0/
SH256 hash:
1ece965ac1a7410c56c47532a43dd7e5b4db0263a8dca53f0554f7ff16003a8c
MD5 hash:
df3e949ba7901c3520698d403c7f1f5c
SHA1 hash:
6cd0bcdcd433cea81f90ecc1bf4e92e9a0d8fde2
Link:
https://www.unpac.me/results/0248b08a-ca56-4589-b8ed-ee68d7fb5bd0/
SH256 hash:
43a98f8be897de5d3fd626871ae8d3a4add5461ddd09ec83db27c8ec5e6d793e
MD5 hash:
c8a0fcff0f8f92d80e1a7d855c7d8b48
SHA1 hash:
04cff1587def4668543115a515f90d90fdb19331
Link:
https://www.unpac.me/results/0248b08a-ca56-4589-b8ed-ee68d7fb5bd0/
Malware family:
AgentTesla.v4
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/43a98f8be897/report/overview.html
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/43a98f8be897de5d3fd626871ae8d3a4add5461ddd09ec83db27c8ec5e6d793e

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

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/451257/

Comments