MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2
SHA3-384 hash: e6b7f671c247887cdff87430a3dfc5eda44b55962adec30b30486277868856176345a1c379e5346882747bb24245e74b
SHA1 hash: 30900cae87e860d480ed98d9142a9b0e7cafc888
MD5 hash: 2c2f9d34317a7fc98e6e9678037fc8d8
humanhash: rugby-july-timing-triple
File name:conhost.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:588'896 bytes
First seen:2024-01-19 05:35:55 UTC
Last seen:2024-01-19 07:28:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 671f2a1f8aee14d336bab98fea93d734 (182 x GuLoader, 4 x Formbook, 4 x RemcosRAT)
ssdeep 12288:v3O9md/6jkzNzUU/OYbr+sU3THAfnapj7LVFvcrURZMlj34aPR2Y/uHbn:fOcYk5YU/NFU3jSapj75WrUslpJ26u7n
TLSH T178C402157799DA9DC05209F9B26DE839C5F6FC1600B3CA63E337BBB9E878A812707111
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 adm1n_usa32
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Romboeder
Issuer:Romboeder
Algorithm:sha256WithRSAEncryption
Valid from:2023-04-27T03:50:35Z
Valid to:2026-04-26T03:50:35Z
Serial number: 53f76094a296520da920ab4817901574c8e02f63
Thumbprint Algorithm:SHA256
Thumbprint: e89562ab0c845b1bda2a9303fdd7240d6d1f348dbcc53e33fd66494c6f944713
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
336
Origin country :
RO RO
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/471615/
Detection(s):
SecuriteInfo.com.Win32.Evo-gen.32390.14401.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the Windows subdirectories
Creating a process from a recently created file
Sending a custom TCP request
Launching a process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/65aa0a4299da41ccd7d7a030/reports/9ab9780c-fa43-43e0-9a00-5995411b06b3/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2
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:
Malicious
Link:
https://analyze.intezer.com/analyses/c9ceb843-d1ef-4696-bb94-27f9c9afaf07
Result
Threat name:
FormBook, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1377225
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected FormBook malware
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Obfuscated command line found
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Searches for Windows Mail specific files
Sigma detected: Steal Google chrome login data
Snort IDS alert for network traffic
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Very long command line found
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1377225 Sample: conhost.exe Startdate: 19/01/2024 Architecture: WINDOWS Score: 100 61 www.y6732cn.cfd 2->61 63 www.ultradronexi.com 2->63 65 10 other IPs or domains 2->65 79 Snort IDS alert for network traffic 2->79 81 Multi AV Scanner detection for domain / URL 2->81 83 Found malware configuration 2->83 85 9 other signatures 2->85 13 conhost.exe 1 46 2->13         started        17 rundll32.exe 2->17         started        signatures3 process4 file5 57 C:\Users\user\AppData\...\Heathery.Sex, ASCII 13->57 dropped 113 Suspicious powershell command line found 13->113 19 powershell.exe 12 13->19         started        signatures6 process7 signatures8 87 Suspicious powershell command line found 19->87 89 Obfuscated command line found 19->89 91 Very long command line found 19->91 93 Found suspicious powershell code related to unpacking or dynamic code loading 19->93 22 powershell.exe 15 19->22         started        25 conhost.exe 19->25         started        process9 signatures10 103 Writes to foreign memory regions 22->103 27 wab.exe 6 22->27         started        process11 dnsIp12 67 inhanoi.net.vn 45.252.248.26, 443, 49713, 49714 AZDIGI-AS-VNAZDIGICorporationVN Viet Nam 27->67 105 Modifies the context of a thread in another process (thread injection) 27->105 107 Maps a DLL or memory area into another process 27->107 109 Sample uses process hollowing technique 27->109 111 Queues an APC in another process (thread injection) 27->111 31 explorer.exe 59 9 27->31 injected signatures13 process14 dnsIp15 69 techusd.com 154.41.252.48, 49721, 49722, 80 COGENT-174US United States 31->69 71 www.y6732cn.cfd 38.238.109.21, 49717, 49718, 80 COGENT-174US United States 31->71 73 5 other IPs or domains 31->73 75 System process connects to network (likely due to code injection or exploit) 31->75 77 Searches for Windows Mail specific files 31->77 35 rundll32.exe 1 18 31->35         started        39 wab.exe 1 31->39         started        41 autofmt.exe 31->41         started        43 wab.exe 31->43         started        signatures16 process17 file18 53 C:\Users\user\AppData\...\J0Plogrv.ini, data 35->53 dropped 55 C:\Users\user\AppData\...\J0Plogri.ini, data 35->55 dropped 95 Detected FormBook malware 35->95 97 Tries to steal Mail credentials (via file / registry access) 35->97 99 Tries to harvest and steal browser information (history, passwords, etc) 35->99 101 5 other signatures 35->101 45 cmd.exe 2 35->45         started        49 firefox.exe 35->49         started        signatures19 process20 file21 59 C:\Users\user\AppData\Local\Temp\DB1, SQLite 45->59 dropped 115 Tries to harvest and steal browser information (history, passwords, etc) 45->115 51 conhost.exe 45->51         started        signatures22 process23
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2/
Threat name:
Win32.Trojan.Makoob
Create hunting rule
Status:
Malicious
First seen:
2024-01-17 14:39:30 UTC
File Type:
PE (Exe)
Extracted files:
9
AV detection:
14 of 23 (60.87%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wojsucroykm4riuhu726ztbjcpc35blmp65cbfztgmee6cj6opra._file
Verdict:
unknown
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:cg86 persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/240119-gakjksfgbj/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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
Reads user/profile data of web browsers
Adds policy Run key to start application
Formbook payload
Formbook
Unpacked files
SH256 hash:
b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2
MD5 hash:
2c2f9d34317a7fc98e6e9678037fc8d8
SHA1 hash:
30900cae87e860d480ed98d9142a9b0e7cafc888
Link:
https://www.unpac.me/results/f098640c-2538-4ccf-b095-d106d9f1d05e/
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/b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2

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:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns

File information

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

Web download

GuLoader

Executable exe b3932a0a2ec299c8a287a7f5eccc2913c5be856c7fba20973333084f093e73e2

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2749171/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/471615/

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