MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba
SHA3-384 hash: c696f9d886fd0431a126dff3c3de1ac4dae14131b1e85aa932630f3af3bd6787c8efe7b1db99b1f3a1bd3b97a6f4fd80
SHA1 hash: ab3f0be7e371c6810b5733604e14e1975e2e3cd4
MD5 hash: 6f7b1158cf352466fc3f0207b0bc2959
humanhash: queen-spaghetti-apart-red
File name:ANALYSE NR.jt001-pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:307'176 bytes
First seen:2023-06-14 10:44:58 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 6144:2x4vyP05yb7EuugWVZ+oYZ4X8IvMTKdfdIj+rmdd6ArMYiJWPY0I/9cCe:g4dcTbsYoYZ4X8IvtdFtodrMYjf29cp
TLSH T14A6402127B60D933D26E0170C42B6EF24EA59D50E9506B572BE07E077E7A3C18A3E35B
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)
Reporter lowmal3
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-02-04T01:43:31Z
Valid to:2026-02-03T01:43:31Z
Serial number: 05bacb5d7a134b11f2a197d62d2d392bca9ff611
Thumbprint Algorithm:SHA256
Thumbprint: b9ffd0cd64843a3749e1dc51df907e8f442ca9c9ca7371114008bef52b5be21e
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
282
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ANALYSE NR.jt001-pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-06-14 10:48:03 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/1cf40428-f414-483e-9a8d-0ab4da2cef9b

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/398701/
Detection(s):
PUA.Win.Packer.Pequake-4
Create hunting rule

SecuriteInfo.com.BackDoor.HRDP.38.4359.6678.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file in the %temp% subdirectories
Searching for the window
Searching for the Windows task manager window
Running batch commands
Creating a process with a hidden window
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/90677/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer guloader lolbin overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/64899a30dafa59a52f42cd86/reports/2185ce26-4b53-4759-8dd0-2d82981ce0e2/overview
Verdict:
Malicious
Labled as:
Trojan.Guloader
Link:
https://www.hybrid-analysis.com/sample/6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba
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:
Unknown
Link:
https://analyze.intezer.com/analyses/eb20e9ab-387d-45f7-8b17-a7b74af07617
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1254379
Signature
Mass process execution to delay analysis
Multi AV Scanner detection for submitted file
Obfuscated command line found
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 887399 Sample: ANALYSE_NR.jt001-pdf.exe Startdate: 14/06/2023 Architecture: WINDOWS Score: 80 40 mehanotehna.hr 2->40 44 Multi AV Scanner detection for submitted file 2->44 46 Yara detected GuLoader 2->46 48 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->48 8 ANALYSE_NR.jt001-pdf.exe 6 50 2->8         started        signatures3 process4 file5 34 C:\Users\user\AppData\Roaming\...\KARAOKE.DLL, PE32 8->34 dropped 36 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 8->36 dropped 38 C:\Users\user\AppData\Local\...\System.dll, PE32 8->38 dropped 50 Obfuscated command line found 8->50 52 Mass process execution to delay analysis 8->52 54 Tries to detect Any.run 8->54 12 ANALYSE_NR.jt001-pdf.exe 6 8->12         started        16 cmd.exe 8->16         started        18 cmd.exe 8->18         started        20 62 other processes 8->20 signatures6 process7 dnsIp8 42 mehanotehna.hr 178.218.173.4, 49835, 80 SEDMIODJEL-ASHR Croatia (LOCAL Name: Hrvatska) 12->42 56 Tries to detect Any.run 12->56 22 Conhost.exe 16->22         started        24 Conhost.exe 18->24         started        26 Conhost.exe 20->26         started        28 Conhost.exe 20->28         started        30 Conhost.exe 20->30         started        32 59 other processes 20->32 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba/
Threat name:
Win32.Trojan.Nemesis
Create hunting rule
Status:
Malicious
First seen:
2023-06-14 10:45:06 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
9 of 37 (24.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ni3erwpphao3c73rw3qt5waan7isa2iyhyucjncvufyk7rspuc5a._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/230614-mtdg9sga85/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks QEMU agent file
Loads dropped DLL
Unpacked files
SH256 hash:
e7b145abc7c519e6bd91dc06b7b83d1e73735ac1ac37d30a7889840a6eed38fc
MD5 hash:
50ba20cad29399e2db9fa75a1324bd1d
SHA1 hash:
3850634bb15a112623222972ef554c8d1eca16f4
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/ad4fc9d9-b60e-4ddb-8965-c8be5fc13f53/
Parent samples :
44dc55275444f583d81f224be2172d1468ca7901032329ad2210a3b7abfaf80e
b3a1509f77da1f09f79e2d0d6b6c6938db01f8ec67fa6adcf992eeb5b6b8698a
6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba
7b7c066f031d5021b3ce30236a545cfea9736fded345e10d3380dd5c89447417
145c299180fb1556c843a944b33f57c933382c801906a9b7ce3f59f7028b0409
SH256 hash:
cba9d8b4cf1f56d9fbf78fed0a1a3d25ba50b625d75961fd9104ee718afb7bdd
MD5 hash:
9d3f6d7a20951040439d782f32ce3edf
SHA1 hash:
c9eb1a93165ee9ae6069c8a0e47eca0d9553b127
Link:
https://www.unpac.me/results/ad4fc9d9-b60e-4ddb-8965-c8be5fc13f53/
SH256 hash:
4bf14031eb0460e4e8234ef1157d8a254354504ced37f86fdbb1644ed45302c0
MD5 hash:
a4e21a6c9cde2319a1d2dc7335229e47
SHA1 hash:
141082e43fd1bbe6e5ac022dd4074b6c9e7a23d4
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/ad4fc9d9-b60e-4ddb-8965-c8be5fc13f53/
Parent samples :
44dc55275444f583d81f224be2172d1468ca7901032329ad2210a3b7abfaf80e
b3a1509f77da1f09f79e2d0d6b6c6938db01f8ec67fa6adcf992eeb5b6b8698a
6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba
7b7c066f031d5021b3ce30236a545cfea9736fded345e10d3380dd5c89447417
145c299180fb1556c843a944b33f57c933382c801906a9b7ce3f59f7028b0409
SH256 hash:
6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba
MD5 hash:
6f7b1158cf352466fc3f0207b0bc2959
SHA1 hash:
ab3f0be7e371c6810b5733604e14e1975e2e3cd4
Link:
https://www.unpac.me/results/ad4fc9d9-b60e-4ddb-8965-c8be5fc13f53/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/6a3648d9ef38/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba

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
Rule name:win_flawedammyy_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.flawedammyy.

File information

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

Malspam

GuLoader

Executable exe 6a3648d9ef381db17f71b6e13ed8006fd12069183e2824b455a170afc64fa0ba

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/398701/

Comments