MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106. 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: 10


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106
SHA3-384 hash: 6b2205ff05bbc5f8017ab8c1f909d4ddb40cb970d1df63b18cee6a48fbf44dcf52c5f170b4dbbd393d72a7052959680e
SHA1 hash: 4f5d7f3e173baf367ff747a5a1863efc0285fcb4
MD5 hash: 3aa52ddc975866acde01bd413d8bed1a
humanhash: cup-wolfram-ten-kitten
File name:T-PO-1435 20240423 A398.com
Download: download sample
Signature GuLoader
Create hunting rule
File size:400'766 bytes
First seen:2024-04-28 09:13:57 UTC
Last seen:2024-04-28 09:32:00 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 66fcdd6338ffed276966867e7cf86116 (9 x GuLoader, 2 x AgentTesla, 2 x RemcosRAT)
ssdeep 6144:j0xJt5VEpswQWeRtOJE0yL1j+RehS0iTNxTUKxi7u2l0BbtBFuwSjndSd4wt:j0Z4pVQWeRtOk+YhSTxYKx5BxLuPnSpt
Threatray 91 similar samples on MalwareBazaar
TLSH T1C7841249DB6C40A7D96B1A31097F742B3EB07C9950768B0BEB593D733933A82C91B316
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 9ad8d8ccece5ce7c (2 x GuLoader)
Reporter abuse_ch
Tags:com exe GuLoader

Intelligence

File Origin
# of uploads :
2
# of downloads :
293
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106.exe
Verdict:
Malicious activity
Analysis date:
2024-04-28 09:32:35 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/03ee1975-1220-4c89-b001-fffdadd4629b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% subdirectories
Launching a process
Running batch commands
Using the Windows Management Instrumentation requests
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/662e135c5a92da3281415577/reports/fa500912-86fe-4bc8-87c7-9f807c7fb8a1/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106
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/8d3c839f-19d9-4add-8b2d-1b746c38d7d1
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1432831
Signature
Antivirus detection for URL or domain
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Obfuscated command line found
Powershell drops PE file
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1432831 Sample: T-PO-1435 20240423 A398.com.exe Startdate: 28/04/2024 Architecture: WINDOWS Score: 100 31 Antivirus detection for URL or domain 2->31 33 Multi AV Scanner detection for dropped file 2->33 35 Multi AV Scanner detection for submitted file 2->35 37 3 other signatures 2->37 7 T-PO-1435 20240423 A398.com.exe 1 27 2->7         started        10 svchost.exe 1 1 2->10         started        process3 dnsIp4 41 Suspicious powershell command line found 7->41 13 powershell.exe 20 7->13         started        29 127.0.0.1 unknown unknown 10->29 signatures5 process6 file7 25 C:\Users\...\T-PO-1435 20240423 A398.com.exe, PE32 13->25 dropped 43 Obfuscated command line found 13->43 45 Writes to foreign memory regions 13->45 47 Found suspicious powershell code related to unpacking or dynamic code loading 13->47 49 2 other signatures 13->49 17 wab.exe 12 13->17         started        21 conhost.exe 13->21         started        23 cmd.exe 1 13->23         started        signatures8 process9 dnsIp10 27 146.70.113.163, 49710, 80 TENET-1ZA United Kingdom 17->27 39 Hides threads from debuggers 17->39 signatures11
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2024-04-24 07:25:51 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vnefozq5bvwibdhansexrzmjmshw4e4ucky73ytb7ab52c6i6eda._file
Verdict:
malicious
Similar samples:
00e9a57fdb09a5e4a8da4ee7fc33e9654851c96fa02b2be3a9616253e1d64bb4
GuLoader
140cd16c7087789b1bff95f27ef03eef85e37e34362f6676a8eaff268b7c693a
GuLoader
2a6653ae72f38620dcd1d53caa82bd341b82be633ca1be99ecf372480d972f0a
GuLoader
57955215d434a2d644bb5d59ca0e4068d49b3903f756e4d0a505b090b3cf494a
GuLoader
5a9df97d04a1d76506fb8c787484ebd383a6210a11e2f10f01b8b0840bc7615b
GuLoader
76dbfa281b158a18c83d08a907f087b7330da28bdd2298eb9ee2f23c1df40491
GuLoader
+ 81 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
persistence
Link:
https://tria.ge/reports/240428-k7bvgscd75/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Unpacked files
SH256 hash:
ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106
MD5 hash:
3aa52ddc975866acde01bd413d8bed1a
SHA1 hash:
4f5d7f3e173baf367ff747a5a1863efc0285fcb4
Link:
https://www.unpac.me/results/db68b476-c222-498e-8059-5846ab5231cd/
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/ab4857661d0d6c808ce06c8978e589648f6e139412b1fde261f803dd0bc8f106

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
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
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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