MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a. 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 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a
SHA3-384 hash: a0b4ccb87a65dd48ffd7b5d01bd6a5265830c778e9e47947d3fcbc84863458abf7e130c8d690e9c564af8ef6e46ca48e
SHA1 hash: 7cc75bf7c2a2cc8a250760188a50e2f86d51e563
MD5 hash: e990d75ee17deb0ad3a5c6ac25d66ad5
humanhash: cold-blossom-massachusetts-ten
File name:e990d75ee17deb0ad3a5c6ac25d66ad5
Download: download sample
Signature GuLoader
Create hunting rule
File size:724'880 bytes
First seen:2024-03-22 04:51:31 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 4f67aeda01a0484282e8c59006b0b352 (51 x GuLoader, 9 x RemcosRAT, 9 x VIPKeylogger)
ssdeep 12288:0o5vFoWW3ZYb6F7W/UOAPMOMfMS6+DSZ7OwF3RFyjM:0ojqZkjlgWESpSZ7t3rYM
Threatray 85 similar samples on MalwareBazaar
TLSH T1EDF469FE6C60B999FE39C6F926148974971A2C15F0103776623C32DBC9B989283C794F
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 827169697979b1b1 (5 x GuLoader, 1 x Formbook)
Reporter zbetcheckin
Tags:32 exe GuLoader signed

Code Signing Certificate

Organisation:Pseudocotyledonary
Issuer:Pseudocotyledonary
Algorithm:sha256WithRSAEncryption
Valid from:2023-12-27T00:01:19Z
Valid to:2026-12-26T00:01:19Z
Serial number: 7da7c3dced2bf36ceabfda77ce774fee8b4cf01a
Thumbprint Algorithm:SHA256
Thumbprint: d4e5d2b4bfcfabe918450a9c27c1c4e6d37f16e112ec1c7cf5319ad57dd520e1
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
341
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a.exe
Verdict:
Malicious activity
Analysis date:
2024-03-22 04:55:15 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/195f996e-dff9-4799-a32a-56e28d79b7f7

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 file in the %temp% directory
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/65fd0e733f97ea2d1e3e44a8/reports/d79a8e48-0ca4-4014-b01c-b8ace548df78/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/425b2cf0-d449-4ab5-bc73-9c09c98142a5
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1413827
Signature
Found direct / indirect Syscall (likely to bypass EDR)
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)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Malicious
First seen:
2024-03-22 04:52:06 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
9 of 23 (39.13%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jkga3ugg3kb23gjurvb2rl6gwwqpiwix7r4ntqibejviyh4ocsna._file
Verdict:
unknown
Similar samples:
37950119cdd0165154841c1fa0803dacccb63012561ea77cb11a787e2c0fa588
GuLoader
7568630cd7cff7c99567be892986482a9f3fe5a41d03f504cf447b831e999046
GuLoader
9e6c23f4e7d05527dc0e8199eadb9c3dc3ed4299df9bc7591d967b02165e9130
GuLoader
c44904bfb8b44d8071f33359f824028597145f76bd1a6baf86d91679215e3c7d
GuLoader
c5663a58153d79aeb1ed3cfcc7f87bddaa1952dfe536507eb95c0920b484742e
GuLoader
cb348e8dbd6c518a9ad671a9fb235cea3eeba8b7036fc5498f6b118d4bc3060b
GuLoader
cfa3c71c41d7a69fdfa223a92ec677067613c69b2b2627d760cda587725bfbf0
GuLoader
d68a5d440931df383de62e3436f5f485ecd75b552e8b78065706a8c880828378
GuLoader
+ 75 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/240322-fhdwbsgh79/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
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
Guloader,Cloudeye
Unpacked files
SH256 hash:
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e
MD5 hash:
3f176d1ee13b0d7d6bd92e1c7a0b9bae
SHA1 hash:
fe582246792774c2c9dd15639ffa0aca90d6fd0b
Link:
https://www.unpac.me/results/4dda6800-6975-45ff-a9c1-17d103f69a2a/
SH256 hash:
4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a
MD5 hash:
e990d75ee17deb0ad3a5c6ac25d66ad5
SHA1 hash:
7cc75bf7c2a2cc8a250760188a50e2f86d51e563
Link:
https://www.unpac.me/results/4dda6800-6975-45ff-a9c1-17d103f69a2a/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
Link:
https://yomi.yoroi.company/submissions/4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a

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:Detect_SliverFox_String
Create hunting rule
Author:huoji
Description:Detect files is `SliverFox` malware
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

File information

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

Web download

GuLoader

Executable exe 4a8c0dd0c6da83ad99348d43a8afc6b5a0f45917fc78d9c101226a8c1f8e149a

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2789621/

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::ShellExecuteA
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

Comments


Avatar
zbet commented on 2024-03-22 04:51:32 UTC

url : hxxp://103.237.87.56/link/anki.exe