MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8
SHA3-384 hash: 1532990df4e8e24b77fb48eb8c83904631e6af80cdf1f27c83d97a4debcbe70113f0c560adea25abf07bb1cd673faf78
SHA1 hash: 61050e2b978e671205defdf4585fb4047298693a
MD5 hash: 80c36affd3f0b21009a93fac33b981c3
humanhash: september-stream-blue-friend
File name:FV- 12.429 TUSOCAL.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:410'794 bytes
First seen:2024-04-30 14:53:30 UTC
Last seen:2024-05-02 05:54:52 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (398 x GuLoader, 59 x RemcosRAT, 45 x AgentTesla)
ssdeep 12288:2ZHkk1AyTuEI6fTk+35p608X/v5WgG/SsW:ykk1A8TtpR8XZWgKS
TLSH T12A941254ABA0D002DCF187B49C73EB7A87FAED3066241B4797947E3B2C176419E4F262
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) (4504/4/1)
File icon (PE):PE icon
dhash icon 687170717979f878 (9 x GuLoader)
Reporter malwarelabnet
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
4
# of downloads :
432
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8.exe
Verdict:
Malicious activity
Analysis date:
2024-04-30 14:54:12 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/9a6f5e74-7e2c-4e7f-a131-7ad7bf6fb0ec

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Ransomware.Purga-9373654-0
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a file in the %temp% subdirectories
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/3eb60913-acbb-40a3-97da-dfbc87f9fd17
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1434185
Signature
Antivirus / Scanner detection for submitted sample
Found direct / indirect Syscall (likely to bypass EDR)
Machine Learning detection for sample
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses runas.exe to run programs with evaluated privileges
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1434185 Sample: FV- 12.429#U00a0TUSOCAL.exe Startdate: 30/04/2024 Architecture: WINDOWS Score: 100 31 www.vicenc39-ns.store 2->31 33 www.vcayy.top 2->33 35 29 other IPs or domains 2->35 49 Snort IDS alert for network traffic 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Antivirus / Scanner detection for submitted sample 2->53 55 5 other signatures 2->55 10 FV- 12.429#U00a0TUSOCAL.exe 6 21 2->10         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\System.dll, PE32 10->29 dropped 13 FV- 12.429#U00a0TUSOCAL.exe 6 10->13         started        process6 dnsIp7 43 drive.usercontent.google.com 142.251.16.132, 443, 50167 GOOGLEUS United States 13->43 45 drive.google.com 172.253.62.100, 443, 50166 GOOGLEUS United States 13->45 67 Maps a DLL or memory area into another process 13->67 17 LxZGFkImbvfsPfEkYf.exe 13->17 injected signatures8 process9 signatures10 47 Found direct / indirect Syscall (likely to bypass EDR) 17->47 20 runas.exe 13 17->20         started        process11 signatures12 57 Tries to steal Mail credentials (via file / registry access) 20->57 59 Tries to harvest and steal browser information (history, passwords, etc) 20->59 61 Modifies the context of a thread in another process (thread injection) 20->61 63 2 other signatures 20->63 23 LxZGFkImbvfsPfEkYf.exe 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 37 www.shortfox.top 203.161.49.193, 50189, 50190, 50191 VNPT-AS-VNVNPTCorpVN Malaysia 23->37 39 www.beersekes.com 14.225.238.195, 50205, 50206, 50207 VNPT-AS-VNVIETNAMPOSTSANDTELECOMMUNICATIONSGROUPVN Viet Nam 23->39 41 9 other IPs or domains 23->41 65 Found direct / indirect Syscall (likely to bypass EDR) 23->65 signatures15
Score:
57%
Verdict:
Susipicious
File Type:
PE
Link:
https://malprob.io/report/79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2024-04-30 13:56:16 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
15 of 36 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=pgvf62nuqzux6oqlrok24bvh6v3cfvtb7p43yrmpm5dldatbitua._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
formbook
Create hunting rule
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/240430-r9vtpsbc27/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
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
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Unpacked files
SH256 hash:
9b93c61c9d63ef8ec80892cc0e4a0877966dca9b0c3eb85555cebd2ddf4d6eed
MD5 hash:
fc3772787eb239ef4d0399680dcc4343
SHA1 hash:
db2fa99ec967178cd8057a14a428a8439a961a73
Link:
https://www.unpac.me/results/126294c0-92d6-423a-b535-6b77e59f8c1f/
SH256 hash:
79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8
MD5 hash:
80c36affd3f0b21009a93fac33b981c3
SHA1 hash:
61050e2b978e671205defdf4585fb4047298693a
Link:
https://www.unpac.me/results/126294c0-92d6-423a-b535-6b77e59f8c1f/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/79aa5f69b486697f3a0b8b95ae06a7f57622d661fbf9bc458f6746b1826144e8

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:NSIS_April_2024
Create hunting rule
Author:NDA0N
Description:Detects NSIS installers

File information

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

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::SetFileSecurityW
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDiskFreeSpaceW
KERNEL32.dll::GetCommandLineW
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::MoveFileW
KERNEL32.dll::MoveFileExW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuW
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::OpenClipboard
USER32.dll::PeekMessageW
USER32.dll::CreateWindowExW

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