MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef71186ea05937d58ac94a1b6223a11dc8331467028e3409180a88d9f612e63b. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ef71186ea05937d58ac94a1b6223a11dc8331467028e3409180a88d9f612e63b
SHA3-384 hash: 54582670edbb4cdee33a266b5d812a31d1c0b7caec02e0566c8f467073dfd10c4809973de1e5142bf428468fded47d45
SHA1 hash: 8cd41fa07dfffcf08be9fc63a63e3a30eaa86c87
MD5 hash: 22981836541e8808ff073f77133fffed
humanhash: whiskey-violet-echo-lion
File name:SecuriteInfo.com.Gen.Variant.Nemesis.10849.26151.24007
Download: download sample
Signature GuLoader
Create hunting rule
File size:167'472 bytes
First seen:2022-09-16 17:14:57 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (295 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 3072:Rtb/CLp6B5PdcTpbtFibg4u6x8BKzuG8+Ji6pX9JevqlCL3wA7N6ZX9/4krSOjS3:RtPgtFv4l+0ad+JzneQLAxEa346N
TLSH T10FF3F15393E2D423D8D6453211ABEF3DDA736F680520466B135C3AE3AE713874A3B94B
TrID 48.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
16.4% (.EXE) Win64 Executable (generic) (10523/12/4)
10.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.0% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 74eecededededee4 (1 x GuLoader)
Reporter SecuriteInfoCom
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Savourilies Hovedfags Bouillonterningerne
Issuer:Savourilies Hovedfags Bouillonterningerne
Algorithm:sha256WithRSAEncryption
Valid from:2021-12-29T07:46:56Z
Valid to:2024-12-28T07:46:56Z
Serial number: 49e4063ff42fb53b
Thumbprint Algorithm:SHA256
Thumbprint: 812d2a87656311bdc0f89ed4e86b03ff1fa1ddbcf96023024bfead3e3c82b256
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
420
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Gen.Variant.Nemesis.10849.26151.24007
Verdict:
Malicious activity
Analysis date:
2022-09-16 17:17:58 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/ed6ffd24-c690-4ef2-87e2-ce7bba0fc80d

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/310641/
Detection(s):
SecuriteInfo.com.Gen.Variant.Nemesis.10849.26151.24007.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Searching for the window
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 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/37933/overview
Behaviour
MalwareBazaar
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
buer overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6324af3eb564f001cc8eb140/reports/64019db6-b8e2-4915-a313-efff20639757/overview
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/cdea17d6-a415-4c7a-af5c-68641403f909
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1071801
Signature
Detected Remcos RAT
Mass process execution to delay analysis
Multi AV Scanner detection for domain / URL
Obfuscated command line found
Performs DNS queries to domains with low reputation
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 704343 Sample: SecuriteInfo.com.Gen.Varian... Startdate: 16/09/2022 Architecture: WINDOWS Score: 100 38 colpatvalidacionnuevo.xyz 2->38 44 Multi AV Scanner detection for domain / URL 2->44 46 Detected Remcos RAT 2->46 48 Yara detected GuLoader 2->48 50 3 other signatures 2->50 8 SecuriteInfo.com.Gen.Variant.Nemesis.10849.26151.24007.exe 6 35 2->8         started        signatures3 process4 file5 34 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 8->34 dropped 36 C:\Users\user\AppData\Local\...\System.dll, PE32 8->36 dropped 52 Obfuscated command line found 8->52 54 Mass process execution to delay analysis 8->54 56 Tries to detect Any.run 8->56 12 SecuriteInfo.com.Gen.Variant.Nemesis.10849.26151.24007.exe 3 11 8->12         started        16 cmd.exe 8->16         started        18 cmd.exe 8->18         started        20 62 other processes 8->20 signatures6 process7 dnsIp8 40 colpatvalidacionnuevo.xyz 142.44.252.26, 64171 OVHFR Canada 12->40 42 185.216.71.95, 49775, 80 CLOUDCOMPUTINGDE Germany 12->42 58 Tries to detect Any.run 12->58 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/ef71186ea05937d58ac94a1b6223a11dc8331467028e3409180a88d9f612e63b/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2022-09-16 17:15:09 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
8 of 39 (20.51%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=55yrq3vale35lcwjjinwei5bdxedgfdhakhdiciybkent5qs4y5q._file
Verdict:
malicious
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/220916-vsj8escadl/
Behaviour
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Loads dropped DLL
Gathering data
Unpacked files
SH256 hash:
3e3d516d4f28948a474704d5dc9907dbe39e3b3f98e7299f536337278c59c5c9
MD5 hash:
b648c78981c02c434d6a04d4422a6198
SHA1 hash:
74d99eed1eae76c7f43454c01cdb7030e5772fc2
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/3dc4b312-c6c9-469c-9782-3cb11fd0ce85/
Parent samples :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 hash:
3cc016ed481b12b540fb50841ce73e9527b0b882c79483fa4b1e67d1b04bd016
MD5 hash:
cab48852af6a007a4cbd4a77c9699799
SHA1 hash:
1fd07927f6dc06c86e5fce476a1e108c10a1b217
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/3dc4b312-c6c9-469c-9782-3cb11fd0ce85/
SH256 hash:
ef71186ea05937d58ac94a1b6223a11dc8331467028e3409180a88d9f612e63b
MD5 hash:
22981836541e8808ff073f77133fffed
SHA1 hash:
8cd41fa07dfffcf08be9fc63a63e3a30eaa86c87
Link:
https://www.unpac.me/results/3dc4b312-c6c9-469c-9782-3cb11fd0ce85/
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/ef71186ea05937d58ac94a1b6223a11dc8331467028e3409180a88d9f612e63b

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: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.

Cape
Cape
https://www.capesandbox.com/analysis/310641/

Comments