MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9. 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: 15


Intelligence 15 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9
SHA3-384 hash: f1326fe9ada55350709774e2661fc4e3230c6baea14b70409d4c6f67f35e4fadd293fa6bb30c4175c5054b0f7e9ea97a
SHA1 hash: 74595e48a4fd969daa241fbb67450c06c1697a6c
MD5 hash: c5bf17f464e0a087a75b2aa79180b379
humanhash: wyoming-cardinal-maine-coffee
File name:Halkbank_Ekstre_87762122_97575533.pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:411'904 bytes
First seen:2024-03-02 17:28:30 UTC
Last seen:2024-03-02 19:22:26 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 57e98d9a5a72c8d7ad8fb7a6a58b3daf (60 x GuLoader, 20 x AZORult, 12 x RemcosRAT)
ssdeep 12288:Qy/1MfPsGV0nhZmeUO7zXZ/9kn8WdnHzZGlMZl5GahX:Qy/23pV0haOXXZ/9knBdHscX
TLSH T15F9412D65BA0F123CA67527095FB6BB6A3B5DF225A210A0307C43FD77D331C69C1A4A8
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 63f392ccc2e8a2c2 (1 x GuLoader, 1 x Formbook)
Reporter abuse_ch
Tags:exe geo GuLoader Halkbank signed TUR

Code Signing Certificate

Organisation:Naturndvendig
Issuer:Naturndvendig
Algorithm:sha256WithRSAEncryption
Valid from:2023-07-12T01:29:47Z
Valid to:2026-07-11T01:29:47Z
Serial number: 2c5991e4670968178f4c2eaadcd97006fc6be9be
Thumbprint Algorithm:SHA256
Thumbprint: 48906178b9a38daeb7df6710db93ccca092f4a211877e9c8e13cf765b5ff4212
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
315
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9.exe
Verdict:
Malicious activity
Analysis date:
2024-03-02 17:35:42 UTC
Tags:
evasion stealer agenttesla
Link:
https://app.any.run/tasks/4b99a684-23f0-431d-8afb-4d15fce1dcc7

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Gen.Variant.Nemesis.254.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file
Searching for the window
Searching for the Windows task manager window
Launching a process
Creating a process with a hidden window
Running batch commands
Using the Windows Management Instrumentation requests
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
installer lolbin masquerade overlay packed redcap shell32
Link:
https://www.filescan.io/uploads/65e361e1ff0555ea5e017e28/reports/78f3b3b6-6f46-46b3-b91a-d34899daedc7/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9
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/3f9b9499-3f5c-4399-9aac-376b3952ea31
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1401930
Signature
Antivirus detection for URL or domain
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Installs a global keyboard hook
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Obfuscated command line found
Powershell creates an autostart link
Powershell drops PE file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Suspicious Double Extension File Execution
Submitted sample is a known malware sample
Suspicious powershell command line found
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 harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses an obfuscated file name to hide its real file extension (double extension)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1401930 Sample: Halkbank_Ekstre_87762122_97... Startdate: 02/03/2024 Architecture: WINDOWS Score: 100 38 mail.taxandcommerce.com 2->38 40 ip-api.com 2->40 42 2 other IPs or domains 2->42 52 Multi AV Scanner detection for domain / URL 2->52 54 Found malware configuration 2->54 56 Antivirus detection for URL or domain 2->56 58 6 other signatures 2->58 8 Halkbank_Ekstre_87762122_97575533.pdf.exe 1 39 2->8         started        signatures3 process4 file5 24 C:\Users\user\AppData\Local\...\BgImage.dll, PE32 8->24 dropped 26 C:\Users\user\AppData\Roaming\...\Lullian.Aut, ASCII 8->26 dropped 28 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 8->28 dropped 60 Submitted sample is a known malware sample 8->60 62 Suspicious powershell command line found 8->62 12 powershell.exe 20 8->12         started        signatures6 process7 file8 30 C:\Users\user\AppData\...\Residentens.exe, PE32 12->30 dropped 64 Obfuscated command line found 12->64 66 Writes to foreign memory regions 12->66 68 Powershell creates an autostart link 12->68 70 Powershell drops PE file 12->70 16 Residentens.exe 15 8 12->16         started        20 conhost.exe 12->20         started        22 cmd.exe 1 12->22         started        signatures9 process10 dnsIp11 32 mail.taxandcommerce.com 65.99.252.33, 49715, 49716, 49717 AS-TIERP-36024US United States 16->32 34 ip-api.com 208.95.112.1, 49714, 80 TUT-ASUS United States 16->34 36 2 other IPs or domains 16->36 44 Multi AV Scanner detection for dropped file 16->44 46 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 16->46 48 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 16->48 50 6 other signatures 16->50 signatures12
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2024-03-02 17:29:05 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=4hbwomnnvvjnyvr3pmlsw2scel2ujhyti4d6sflrjn53cm4sv7mq._file
Verdict:
unknown
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader persistence
Link:
https://tria.ge/reports/240302-v2jy1sfd61/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
NSIS installer
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
c2c88e4a32c734b0cb4ae507c1a9a1b417a2375079111fb1b35fab23aedd41d9
MD5 hash:
b38561661a7164e3bbb04edc3718fe89
SHA1 hash:
f13c873c8db121ba21244b1e9a457204360d543f
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/6929659f-8ef0-4fb2-b80c-8035bc957a79/
Parent samples :
99aa0a112de10ceb2072e32e189befed18db5ce294787bf9b2dbe0ef643ba62c
b9fdbe8b2868d78c2fbe632a82d102bf5b334b256d21565e3173ba8ebe169ba5
b07907ce3ee14b8128039ecb8e635976fc216c77035d5bf38f42ed900197c879
87ad183c319765afb8556ac2ed508d2687c85b43b0848d251b87edbf0279fb97
27d75cacb0ec5845bd163635926ca0ecef4ea1bb92032df9e81e64b6e406e5a2
f95a2ee16ee39b92e9e3a5c87605021ff09d35ecf7eae9acaf6ea58c38ded834
e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9
e9934abfdede625607cf46cbf7afe5dcab892e94117ab3bf827dafcf6be5eef1
dda95c5fac8c1882520a76aeb8dc397346e3f38bc6cb11aee7d96feea0d3a086
0ffb9d8b5cc25cd280763fe84065f5f149b17eb5d9e19dd59ba6c324d292572b
907d76317c31e9ca799beeef08144d12f5005fcb4acf17848f9f467e098648d9
98598c90bd75b930aba968467f4b540a5784aa28612b8010d8a9cf31992843c6
SH256 hash:
d0607e535ff5573638ee1d70612e2239d5cb3c87307f48cfd57aa1c5cc0d9524
MD5 hash:
24db082241ace4aca15bdf1e8460c92b
SHA1 hash:
d317ef130af6ea6a72a958eee20a58568d38f23d
Link:
https://www.unpac.me/results/6929659f-8ef0-4fb2-b80c-8035bc957a79/
SH256 hash:
bf0cf3990c6c23dd91ec21071c31537f36355b6d6900358e1536b9a377427619
MD5 hash:
26fc881f84b7f9081cf6b58ab8f9ec08
SHA1 hash:
c4424b9a716392228d55f7d067592d77e9d1b5d2
Detections:
win_flawedammyy_auto
Create hunting rule
Link:
https://www.unpac.me/results/6929659f-8ef0-4fb2-b80c-8035bc957a79/
Parent samples :
99aa0a112de10ceb2072e32e189befed18db5ce294787bf9b2dbe0ef643ba62c
b9fdbe8b2868d78c2fbe632a82d102bf5b334b256d21565e3173ba8ebe169ba5
b07907ce3ee14b8128039ecb8e635976fc216c77035d5bf38f42ed900197c879
87ad183c319765afb8556ac2ed508d2687c85b43b0848d251b87edbf0279fb97
27d75cacb0ec5845bd163635926ca0ecef4ea1bb92032df9e81e64b6e406e5a2
f95a2ee16ee39b92e9e3a5c87605021ff09d35ecf7eae9acaf6ea58c38ded834
e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9
e9934abfdede625607cf46cbf7afe5dcab892e94117ab3bf827dafcf6be5eef1
dfae751806a1becfa849574b7b2a243f902550f1f72458bed5bc03779fea2f0b
d8d23e874918f7f77e8ac832e69adef1bda5244e403364a6ad5cb18e8ecbcb5e
dda95c5fac8c1882520a76aeb8dc397346e3f38bc6cb11aee7d96feea0d3a086
0ffb9d8b5cc25cd280763fe84065f5f149b17eb5d9e19dd59ba6c324d292572b
SH256 hash:
e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9
MD5 hash:
c5bf17f464e0a087a75b2aa79180b379
SHA1 hash:
74595e48a4fd969daa241fbb67450c06c1697a6c
Link:
https://www.unpac.me/results/6929659f-8ef0-4fb2-b80c-8035bc957a79/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/e1c36731adad/report/overview.html
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/e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9

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

File information

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

Malspam

GuLoader

Executable exe e1c36731adad52dc563b7b172b6a4222f5449f134707e915714b7bb13392afd9

(this sample)

  
Delivery method
Distributed via e-mail attachment

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_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::SetFileSecurityA
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExA
SHELL32.dll::SHFileOperationA
SHELL32.dll::SHGetFileInfoA
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessA
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExA
KERNEL32.dll::GetDiskFreeSpaceA
KERNEL32.dll::GetCommandLineA
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileA
KERNEL32.dll::CreateDirectoryA
KERNEL32.dll::CreateFileA
KERNEL32.dll::DeleteFileA
KERNEL32.dll::MoveFileExA
KERNEL32.dll::MoveFileA
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueA
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExA
ADVAPI32.dll::RegDeleteKeyA
ADVAPI32.dll::RegOpenKeyExA
ADVAPI32.dll::RegQueryValueExA
ADVAPI32.dll::RegSetValueExA
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuA
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExA
USER32.dll::OpenClipboard
USER32.dll::PeekMessageA
USER32.dll::CreateWindowExA

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