MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bfbf686e69312f7fba239de406f221d8681c9bade43576cab3ae5346546d3e51. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bfbf686e69312f7fba239de406f221d8681c9bade43576cab3ae5346546d3e51
SHA3-384 hash: 976f114b9ad29411e0bb57068f55f680e3034df9ef589746616059746c706328c6b9fcb54a96b4376c4e2438e1c04533
SHA1 hash: 1b10a89fd84121d408d638f739cd19cb56a51bce
MD5 hash: 08d848ab644810a779ab7e8605ddd1b7
humanhash: autumn-victor-dakota-hot
File name:DOC_267467483_FEDEX_JPG.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:456'744 bytes
First seen:2022-08-24 15:51:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (310 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 12288:Z0eTMw3LBz4lkMoGXyJMMAOLOqzOvtEXNR:Z0sb3tMeMofN5OqzO2R
TLSH T1A1A41255B64CC905D1714E73E9E9DA9D9B3A6C179200EE0F2B2179BA7063393360B2CF
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 e3d8ae86c6eb7476 (1 x GuLoader)
Reporter abuse_ch
Tags:exe FedEx GuLoader signed

Code Signing Certificate

Organisation:Vinalia Indtgtsniveau
Issuer:Vinalia Indtgtsniveau
Algorithm:sha256WithRSAEncryption
Valid from:2022-07-06T23:52:11Z
Valid to:2025-07-05T23:52:11Z
Serial number: -53bbe797d55bd2c3
Thumbprint Algorithm:SHA256
Thumbprint: 416fe3de8dadd98416a2c3415a3d262595ec0cba1a6bbe6b6ef4c343e68835f9
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
326
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DOC_267467483_FEDEX_JPG.exe
Verdict:
Malicious activity
Analysis date:
2022-08-24 15:59:52 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a27e74d6-07ab-4dd2-91d8-059621462161

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/300911/
Detection(s):
SecuriteInfo.com.Trojan.DownLoad4.12041.10.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/29948/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/6306492e3cbb13868a7ad549/reports/da763fb3-47c4-4fa1-a8cd-c43213bcf358/overview
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/9944284f-3f62-467e-9075-a4207925c30c
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1057130
Signature
Initial sample is a PE file and has a suspicious name
Mass process execution to delay analysis
Obfuscated command line found
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Snort IDS alert for network traffic
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 ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 689652 Sample: DOC_267467483_FEDEX_JPG.exe Startdate: 24/08/2022 Architecture: WINDOWS Score: 100 44 ftp.instantprint.ro 2->44 46 csepelgumi.hu 2->46 52 Snort IDS alert for network traffic 2->52 54 Yara detected GuLoader 2->54 56 Yara detected AgentTesla 2->56 58 2 other signatures 2->58 8 DOC_267467483_FEDEX_JPG.exe 2 38 2->8         started        signatures3 process4 file5 36 C:\Users\user\AppData\Roaming\...\wabimp.dll, PE32+ 8->36 dropped 38 C:\Users\...\api-ms-win-core-synch-l1-2-0.dll, PE32 8->38 dropped 40 C:\Users\user\AppData\Roaming\...\i1d3SDK.dll, PE32+ 8->40 dropped 42 2 other files (none is malicious) 8->42 dropped 60 Obfuscated command line found 8->60 62 Writes to foreign memory regions 8->62 64 Mass process execution to delay analysis 8->64 66 Tries to detect Any.run 8->66 12 CasPol.exe 15 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 48 ftp.instantprint.ro 86.105.155.116, 21, 49792, 49793 CHROOTBucharestROMANIAEURO Romania 12->48 50 csepelgumi.hu 185.33.54.1, 443, 49786 SERVERGARDEN-ASServergardenKftHU Hungary 12->50 68 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->68 70 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->70 72 Tries to steal Mail credentials (via file / registry access) 12->72 74 4 other signatures 12->74 22 conhost.exe 12->22         started        24 Conhost.exe 16->24         started        26 Conhost.exe 18->26         started        28 Conhost.exe 20->28         started        30 Conhost.exe 20->30         started        32 Conhost.exe 20->32         started        34 59 other processes 20->34 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/bfbf686e69312f7fba239de406f221d8681c9bade43576cab3ae5346546d3e51/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2022-08-24 14:41:49 UTC
File Type:
PE (Exe)
Extracted files:
9
AV detection:
11 of 26 (42.31%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=x67wq3tjgexx7ordtxsan4rb3bubzg5n4q2xnsvtvzjumvdnhziq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/220824-ta3rdaffdj/
Behaviour
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
4c86b238e64ecfaabe322a70fd78db229a663ccc209920f3385596a6e3205f78
MD5 hash:
375e8a08471dc6f85f3828488b1147b3
SHA1 hash:
1941484ac710fc301a7d31d6f1345e32a21546af
Link:
https://www.unpac.me/results/bf445a2f-8a0a-430a-b448-f118fd6308cc/
SH256 hash:
6a782a1c605e0e44fec09985301ecb1b36612622c083b58d3af6778c6c73a677
MD5 hash:
964de88ec2f026e974821d1bc6aa5d81
SHA1 hash:
7e2b07e7c2475ca960bdfba22726eb0c74570126
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/bf445a2f-8a0a-430a-b448-f118fd6308cc/
Parent samples :
bfbf686e69312f7fba239de406f221d8681c9bade43576cab3ae5346546d3e51
034f1e9f489823381b6205ca77dd7277222b1a9813fc97834b78cca7aab6de4d
c62df0729acd9f8e1b3b922113242fc75a746b15d184cbbcf7a429fe4730bd98
86b6cfdcb0feccdea122debf61b51c1756e53def13a4468637539264ec35d208
ebe31ad40a9ce206268d9f355e42ca4979847bfd861b3d157c06ed1bd842219c
SH256 hash:
9ad444182cef4655b8d7db5771f0817d63851c3153c0ec3f9a0f7ef79889ed60
MD5 hash:
feb5cd3c6789f1ad1f68b8b0cd90a28a
SHA1 hash:
a590a0b7eba5258089953850e4f273d9e242314e
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/bf445a2f-8a0a-430a-b448-f118fd6308cc/
SH256 hash:
bfbf686e69312f7fba239de406f221d8681c9bade43576cab3ae5346546d3e51
MD5 hash:
08d848ab644810a779ab7e8605ddd1b7
SHA1 hash:
1b10a89fd84121d408d638f739cd19cb56a51bce
Link:
https://www.unpac.me/results/bf445a2f-8a0a-430a-b448-f118fd6308cc/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.02
Link:
https://yomi.yoroi.company/submissions/bfbf686e69312f7fba239de406f221d8681c9bade43576cab3ae5346546d3e51

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.

Malspam

GuLoader

Executable exe bfbf686e69312f7fba239de406f221d8681c9bade43576cab3ae5346546d3e51

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/300911/

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