MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b76a4012988dbfb88640ddbe67bb6dc3ac26a142487f283af4933dd2a55f2cab. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b76a4012988dbfb88640ddbe67bb6dc3ac26a142487f283af4933dd2a55f2cab
SHA3-384 hash: f31c3770aa28894db7f76c6e2d82df0172d7677580d2d6a9a3eca23b7fbb484fb59baf3f0d50a48cc948957d95453007
SHA1 hash: 6dcc4d9a4996a6595eb6eef25833cf7390a3f75a
MD5 hash: a2e8b7b6b3b0d76612923de02e653b00
humanhash: nitrogen-sweet-four-william
File name:Purchase Order-#17001396.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:456'904 bytes
First seen:2022-11-07 23:52:44 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 6144:tBeDgqcMgWzh7Qz0h7+XV7ME7kb5xCOf9Gcm5xO0aEA1xrVSyUShkt8DyO:TqcMXh76k7+N7kbHCp95xO0cXEyUu/
Threatray 1'020 similar samples on MalwareBazaar
TLSH T123A422815E2F2167D60542B485B3DAF9F779FE208425160B17403FA6287E7A2EF293CD
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)
Reporter GovCERT_CH
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2021-11-30T16:54:54Z
Valid to:2024-11-29T16:54:54Z
Serial number: 11b6532fe06d4e51
Thumbprint Algorithm:SHA256
Thumbprint: b65af37a730cec7d8c5344437391fef653b7bee604e40b515ebd5b76bdce0a7f
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
159
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
Purchase Order-#17001396.exe
Verdict:
Malicious activity
Analysis date:
2022-11-07 23:53:34 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/3653b2ff-337e-4ed4-ae3d-555c2477b5d0

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/330288/
Detection(s):
SecuriteInfo.com.Mal.Generic-S.31020.16397.20236.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/49907/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/63699a5f8f7ad620b39c010d/reports/f0450a1d-eecc-43a3-bcc9-52bba595d1c0/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/b57fa9bb-bdd3-4b84-8815-c793d4b737b7
Result
Threat name:
Azorult, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.phis.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1107819
Signature
Executable has a suspicious name (potential lure to open the executable)
Found many strings related to Crypto-Wallets (likely being stolen)
Initial sample is a PE file and has a suspicious name
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Self deletion via cmd or bat file
Snort IDS alert for network traffic
Tries to detect Any.run
Tries to harvest and steal Bitcoin Wallet information
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 Crypto Currency Wallets
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Yara detected Azorult
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 740483 Sample: Purchase Order-#17001396.exe Startdate: 08/11/2022 Architecture: WINDOWS Score: 100 36 billnaire.shop 2->36 38 threadsoftimeembroidery.com 2->38 44 Snort IDS alert for network traffic 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 6 other signatures 2->50 9 Purchase Order-#17001396.exe 39 2->9         started        signatures3 process4 file5 24 C:\Users\user\AppData\...\lang-1036.dll, PE32 9->24 dropped 26 C:\Users\user\AppData\Local\...\System.dll, PE32 9->26 dropped 52 Tries to detect Any.run 9->52 13 Purchase Order-#17001396.exe 63 9->13         started        signatures6 process7 dnsIp8 40 billnaire.shop 188.114.97.3, 49830, 49832, 80 CLOUDFLARENETUS European Union 13->40 42 threadsoftimeembroidery.com 50.31.160.189, 49829, 80 SERVERCENTRALUS United States 13->42 28 C:\Users\user\AppData\...\vcruntime140.dll, PE32 13->28 dropped 30 C:\Users\user\AppData\Local\...\ucrtbase.dll, PE32 13->30 dropped 32 C:\Users\user\AppData\Local\...\softokn3.dll, PE32 13->32 dropped 34 45 other files (none is malicious) 13->34 dropped 54 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 13->54 56 Tries to steal Instant Messenger accounts or passwords 13->56 58 Tries to steal Mail credentials (via file / registry access) 13->58 60 6 other signatures 13->60 18 cmd.exe 1 13->18         started        file9 signatures10 process11 process12 20 conhost.exe 18->20         started        22 timeout.exe 1 18->22         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b76a4012988dbfb88640ddbe67bb6dc3ac26a142487f283af4933dd2a55f2cab/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2022-11-07 02:48:03 UTC
File Type:
PE (Exe)
Extracted files:
12
AV detection:
16 of 42 (38.10%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w5veaeuyrw73rbsa3w7gpo3nyowcnikcjb7sqoxusm65fjk7fsvq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
1aba3ebf5fc7d6221270fa7e13713216e06b678b197524a35d3a5cd9b1e0d857
GuLoader
5f2846d5daa6e5781427feb62144502ff1522b8250eadbfb7aa3602d04eac1fb
GuLoader
65dee75f5d4f0d7e0c1065a689ebe79f67c87a4d3d9654193164128e859a0ddd
GuLoader
9cc0cf19e63fbf43ed381c94967a1c52a606452657cc05c17b27a1a07e2c5607
GuLoader
ac80582931ac0fbe465b81a7f53894d9eebf867cae0c9e2865136078826bb49a
GuLoader
b643d5ee1be492fcbfbfb4c9b9bf3da8460b74ab2097b96e6545318c92f2ee26
GuLoader
c1268d5dc321b64579a0a68ba97c32f315ebd23d2f895a47c72b9ed54172eb69
GuLoader
ea07ac0be9b5d757b3d6eab704606fb022770451be04c729af03f3a0941d3fc8
GuLoader
f98183a2ad674f8aae6ad47e7da8b48c80175148ba333f0f57b3e6eca64bfaa6
GuLoader
+ 1'010 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/221107-3xahsafdf3/
Behaviour
Enumerates physical storage devices
Drops file in System32 directory
Loads dropped DLL
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/8277b736-fc27-4345-b872-a4af89b166e9
Unpacked files
SH256 hash:
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
MD5 hash:
3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 hash:
fe582246792774c2c9dd15639ffa0aca90d6fd0b
Link:
https://www.unpac.me/results/388f7ff5-8acc-4664-ad19-67a8ce958984/
SH256 hash:
b76a4012988dbfb88640ddbe67bb6dc3ac26a142487f283af4933dd2a55f2cab
MD5 hash:
a2e8b7b6b3b0d76612923de02e653b00
SHA1 hash:
6dcc4d9a4996a6595eb6eef25833cf7390a3f75a
Link:
https://www.unpac.me/results/388f7ff5-8acc-4664-ad19-67a8ce958984/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.03
Link:
https://yomi.yoroi.company/submissions/b76a4012988dbfb88640ddbe67bb6dc3ac26a142487f283af4933dd2a55f2cab

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

File information

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

Malspam

GuLoader

Executable exe b76a4012988dbfb88640ddbe67bb6dc3ac26a142487f283af4933dd2a55f2cab

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/330288/

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