MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 691b3081c37299b525225363c19e0bbd9610295740f6b8efefba801730613432. 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: 691b3081c37299b525225363c19e0bbd9610295740f6b8efefba801730613432
SHA3-384 hash: d970dde94544a8f07a75f5f0420d86e346456cd86e50b5ac8a934135f12daefa4b70400acc80ad91708435a6afa227ba
SHA1 hash: 3c99e2661241ad053b92a1f8cd436553b2307bb3
MD5 hash: 7cae8e986ff0270e4926f21688bcae1c
humanhash: hot-thirteen-bluebird-muppet
File name:r______________.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:813'400 bytes
First seen:2023-09-08 13:21:37 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash d4b94e8ee3f620a89d114b9da4b31873 (90 x GuLoader, 18 x njrat, 9 x RemcosRAT)
ssdeep 12288:95GdGIdeORq3eur25Kuj/RWKl+MwWlRJ6dwuaeLqHlpqwnNyBZb:49rg3v25RJWK+yX6+EOrngjb
TLSH T18E050142B6009492DC2CA770D967DEA71A73BF786D60CC5332B47F2DDE77682991320A
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 ece0d0f0c0d8f0f0 (2 x GuLoader, 1 x RemcosRAT)
Reporter FXOLabs
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-06-09T01:26:19Z
Valid to:2026-06-08T01:26:19Z
Serial number: 24a209424b02fd6817fa6fbe4c30c645216cfbee
Thumbprint Algorithm:SHA256
Thumbprint: ba48c9ec59e02356dfb4bff42a7f5636f95188831e67e822269c14b7a467c5f4
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
283
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
r______________.exe
Verdict:
Suspicious activity
Analysis date:
2023-09-08 13:23:19 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/e5b9e861-29dc-4a78-8055-686c168c9639

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/447433/
Detection(s):
SecuriteInfo.com.Win32.SuspectCrc.24846.3690.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Searching for the window
Delayed reading of the file
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/64fb1ffaefe2af27e9c6a3a9/reports/90c7a3c5-4d39-46da-b8f9-8fd01be2a346/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/691b3081c37299b525225363c19e0bbd9610295740f6b8efefba801730613432
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/21a5ce3e-b5d6-4271-ac5b-c59e87560144
Result
Threat name:
GuLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad.phis.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1306177
Signature
Antivirus detection for URL or domain
Contains functionality to modify clipboard data
Installs a global keyboard hook
Maps a DLL or memory area into another process
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 steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1306177 Sample: r______________.exe Startdate: 08/09/2023 Architecture: WINDOWS Score: 100 34 vahid.intendemo.ir 2->34 36 geoplugin.net 2->36 50 Snort IDS alert for network traffic 2->50 52 Antivirus detection for URL or domain 2->52 54 Yara detected GuLoader 2->54 56 4 other signatures 2->56 8 r______________.exe 1 32 2->8         started        signatures3 process4 file5 26 C:\Users\user\AppData\Local\...\System.dll, PE32 8->26 dropped 28 C:\Users\user\AppData\Local\...\LangDLL.dll, PE32 8->28 dropped 58 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 8->58 60 Writes to foreign memory regions 8->60 62 Tries to detect Any.run 8->62 64 Maps a DLL or memory area into another process 8->64 12 wab.exe 4 16 8->12         started        signatures6 process7 dnsIp8 38 vahid.intendemo.ir 37.228.136.178, 49739, 80 POLIR Iran (ISLAMIC Republic Of) 12->38 40 95.214.24.210, 2404, 49742, 49743 CMCSUS Germany 12->40 42 geoplugin.net 178.237.33.50, 49744, 80 ATOM86-ASATOM86NL Netherlands 12->42 30 C:\Users\user\AppData\Roaming\ourytgbh.dat, data 12->30 dropped 32 C:\Users\user\AppData\...\Sarcopoietic.exe, PE32 12->32 dropped 66 Tries to detect Any.run 12->66 68 Maps a DLL or memory area into another process 12->68 70 Installs a global keyboard hook 12->70 17 wab.exe 1 12->17         started        20 wab.exe 1 12->20         started        22 wab.exe 2 12->22         started        24 2 other processes 12->24 file9 signatures10 process11 signatures12 44 Tries to steal Instant Messenger accounts or passwords 17->44 46 Tries to harvest and steal browser information (history, passwords, etc) 17->46 48 Tries to steal Mail credentials (via file / registry access) 20->48
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/691b3081c37299b525225363c19e0bbd9610295740f6b8efefba801730613432/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-09-08 07:48:39 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
10 of 38 (26.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=nentbaodokm3kjjcknr4dhqlxwlbakkxid3lr37pxkabomdbgqza._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader persistence
Link:
https://tria.ge/reports/230908-ql79fsbh7t/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Checks QEMU agent file
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
MD5 hash:
ee260c45e97b62a5e42f17460d406068
SHA1 hash:
df35f6300a03c4d3d3bd69752574426296b78695
Link:
https://www.unpac.me/results/d5cd7cf0-2b8f-472c-b889-6695644924a5/
SH256 hash:
691b3081c37299b525225363c19e0bbd9610295740f6b8efefba801730613432
MD5 hash:
7cae8e986ff0270e4926f21688bcae1c
SHA1 hash:
3c99e2661241ad053b92a1f8cd436553b2307bb3
Link:
https://www.unpac.me/results/d5cd7cf0-2b8f-472c-b889-6695644924a5/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/691b3081c372/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/691b3081c37299b525225363c19e0bbd9610295740f6b8efefba801730613432

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
Rule name:PE_Potentially_Signed_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.

Malspam

GuLoader

Executable exe 691b3081c37299b525225363c19e0bbd9610295740f6b8efefba801730613432

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/447433/

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