MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a90c7b4223bca6a28296894c66845de8fb61e7028b9c45ab8e0ec7d27db0bf71. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a90c7b4223bca6a28296894c66845de8fb61e7028b9c45ab8e0ec7d27db0bf71
SHA3-384 hash: 92d60db2b34b30a1fee797597bda9014af5a497fc648069b72ad01dfbc3b998a96df5dbcd475d8ecbc92eb9eec4e57f6
SHA1 hash: efb918ee62ff5cca7bdc10d180c7f7837c8e2b6b
MD5 hash: 0e1262a4ce5ac71ad5b8df93030d61b5
humanhash: april-massachusetts-massachusetts-music
File name:z14Novospedidosdecompra_Profil_4903.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:533'858 bytes
First seen:2024-04-19 17:09:59 UTC
Last seen:2024-04-19 17:34:38 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (385 x GuLoader, 58 x RemcosRAT, 40 x AgentTesla)
ssdeep 12288:fzA/ggggjrBj93vPbk8tGtP7ocMzAGrP+jp:U/ggggj9jpvY84mAGrPu
Threatray 937 similar samples on MalwareBazaar
TLSH T15FB4E1ABEB908526D93807B4E973C1181B749C963E71DF4F07897460AFF738238A9617
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 82aeb2c2d0fcfcf4 (2 x GuLoader)
Reporter FXOLabs
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
22
# of downloads :
352
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Novos pedidos de compra_Profil_4903.7z
Verdict:
Malicious activity
Analysis date:
2024-04-18 17:08:45 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c707675b-3c59-4b2f-b42e-fbafc5986884

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

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Launching a process
Running batch commands
Using the Windows Management Instrumentation requests
Moving a file to the Program Files subdirectory
Replacing files
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/6622a56f3137a4e0f3bbafcc/reports/d7212acd-3fc9-43f1-82a1-0a3a3c866e6b/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/a90c7b4223bca6a28296894c66845de8fb61e7028b9c45ab8e0ec7d27db0bf71
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/0f9acf48-4c14-4491-b9a4-8d60416c1a6f
Result
Threat name:
GuLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1428880
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Obfuscated command line found
Powershell drops PE file
Sigma detected: Wab/Wabmig Unusual Parent Or Child Processes
Snort IDS alert for network traffic
Suspicious powershell command line found
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)
Uses dynamic DNS services
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: 1428880 Sample: z14Novospedidosdecompra_Pro... Startdate: 19/04/2024 Architecture: WINDOWS Score: 100 46 learfo55ozj01.duckdns.org 2->46 48 ricohltd.top 2->48 50 geoplugin.net 2->50 58 Snort IDS alert for network traffic 2->58 60 Found malware configuration 2->60 62 Antivirus detection for URL or domain 2->62 66 11 other signatures 2->66 10 z14Novospedidosdecompra_Profil_4903.exe 2 29 2->10         started        signatures3 64 Uses dynamic DNS services 46->64 process4 file5 42 C:\Users\user\AppData\...\Kursusplans.Fje, ASCII 10->42 dropped 74 Suspicious powershell command line found 10->74 14 powershell.exe 20 10->14         started        signatures6 process7 file8 44 z14Novospedidosdecompra_Profil_4903.exe, PE32 14->44 dropped 82 Obfuscated command line found 14->82 84 Writes to foreign memory regions 14->84 86 Found suspicious powershell code related to unpacking or dynamic code loading 14->86 88 2 other signatures 14->88 18 wab.exe 5 15 14->18         started        23 conhost.exe 14->23         started        25 cmd.exe 1 14->25         started        signatures9 process10 dnsIp11 52 learfo55ozj01.duckdns.org 193.222.96.21, 29871, 49738, 49739 SWISSCOMSwisscomSwitzerlandLtdCH Germany 18->52 54 ricohltd.top 104.21.60.38, 443, 49737 CLOUDFLARENETUS United States 18->54 56 geoplugin.net 178.237.33.50, 49740, 80 ATOM86-ASATOM86NL Netherlands 18->56 40 C:\Users\user\AppData\Roaming\mqerms.dat, data 18->40 dropped 68 Maps a DLL or memory area into another process 18->68 70 Hides threads from debuggers 18->70 72 Installs a global keyboard hook 18->72 27 wab.exe 1 18->27         started        30 wab.exe 1 18->30         started        32 wab.exe 14 18->32         started        34 2 other processes 18->34 file12 signatures13 process14 signatures15 76 Tries to steal Instant Messenger accounts or passwords 27->76 78 Tries to harvest and steal browser information (history, passwords, etc) 27->78 80 Tries to steal Mail credentials (via file / registry access) 30->80 36 conhost.exe 34->36         started        38 reg.exe 1 1 34->38         started        process16
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a90c7b4223bca6a28296894c66845de8fb61e7028b9c45ab8e0ec7d27db0bf71
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a90c7b4223bca6a28296894c66845de8fb61e7028b9c45ab8e0ec7d27db0bf71/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2024-04-18 16:39:27 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=veghwqrdxstkfauwrfggnbc55d5wdzycrooelk4ob3d5e7nqx5yq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
3137663df90055b5c2dd92ff91ed1a0edc6965dbd50f83578643c727b36b060b
GuLoader
39904c5d67aebdeb68b5bc799559dda7fe7bd9db166fd8dc72e7e4c0ce5d6491
GuLoader
66c25b056feae73374a9cb4db0469c94d0a1d2d91cfe09cad1e890e72d5bfb70
GuLoader
71a0db97867945fa69250aa55e3d997aaf11f5e401db8e59c87e7937e36343f0
GuLoader
73e2064d3989b863781bff3c15319c8baa58aa68997eb28417ffc7354d1a77e6
GuLoader
8081e0bda5a4d7cf536969b1a62ec3d550d1f806e189ee4a6eb14524b4eb9c64
GuLoader
84176781043f8f95306328477f7b28fa721f44b1767fe740cbd207233c2a47c6
GuLoader
a731a3484aa2cde6c16d273b0838b664de71e45c498d6412dca328b457873248
GuLoader
e3c50af5dfca67fd9af9530c801ef172bde856241cf6b2c8596421b9a7ae8882
GuLoader
ea38b6131bffa783cde57e659bf5aad8d7af08359e4d4a8be016f7f296bb3499
GuLoader
+ 927 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader persistence
Link:
https://tria.ge/reports/240419-vppczaab86/
Behaviour
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Guloader,Cloudeye
Unpacked files
SH256 hash:
a90c7b4223bca6a28296894c66845de8fb61e7028b9c45ab8e0ec7d27db0bf71
MD5 hash:
0e1262a4ce5ac71ad5b8df93030d61b5
SHA1 hash:
efb918ee62ff5cca7bdc10d180c7f7837c8e2b6b
Link:
https://www.unpac.me/results/b3ee045d-9ea2-4e7e-a045-cfd0fbf1c84f/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a90c7b4223bc/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

File information

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

Malspam

GuLoader

Executable exe a90c7b4223bca6a28296894c66845de8fb61e7028b9c45ab8e0ec7d27db0bf71

(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_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

Comments