MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc. 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


Threat unknown


Vendor detections: 12


Intelligence 12 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc
SHA3-384 hash: 2ce5f8e62b0a774499b37f129fa51f2a53170df770b58af0ff007d1dd12e225dc91eb11e948a30a3b6d43b2424b38342
SHA1 hash: c4638921bb140e7b6a722d7c4d88afa7ed4e55c8
MD5 hash: 152e3f07bbaf88fb8b097ba05a60df6e
humanhash: crazy-fillet-steak-cola
File name:Install.exe
Download: download sample
File size:166'400 bytes
First seen:2024-05-05 22:53:07 UTC
Last seen:2024-09-09 21:03:42 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash eb3adbfdfdb25911eaec8fef643f639b (1 x R77)
ssdeep 3072:KQpsO4jaqeCDcvpeCkZNQgAxjJ2hfOiFIYHwHzaQ09V098F/fUO5tTl:KQpsO4jajCIvpe/ZNQZuhfLguQ00KHTl
TLSH T11FF30241E7E52130F9BF0EB92CF785419936B4B97B12DA3F29B550DE09B1A418072FB2
TrID 37.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
20.0% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
12.7% (.EXE) Win64 Executable (generic) (10523/12/4)
7.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter JaffaCakes118
Tags:exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
485
Origin country :
GB GB
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
https://github.com/MasonGroup/NiptuneRAT/tree/main
Verdict:
Malicious activity
Analysis date:
2024-03-08 22:07:56 UTC
Tags:
asyncrat xworm
Link:
https://app.any.run/tasks/a37c940b-18a1-4763-81a0-d7a185ea0c76

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Rootkit.R77-10009366-0
Create hunting rule

Win.Packed.Lazy-10019085-0
Create hunting rule

Win.Packed.Lazy-10019086-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the Windows subdirectories
Launching a process
Searching for synchronization primitives
Creating a file in the system32 subdirectories
Setting browser functions hooks
Forced shutdown of a system process
Enabling autorun by creating a file
Using obfuscated Powershell scripts
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
crypto evasive packed
Link:
https://www.filescan.io/uploads/66380e0bb8652ad9949fc7e9/reports/3f3d9d2c-5474-4f8b-a921-2bda564e7f95/overview
Verdict:
Malicious
Labled as:
Rootkit.Agent
Link:
https://www.hybrid-analysis.com/sample/a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/e61f8a53-c830-4920-b79c-1f5386a3fd8f
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1436542
Signature
.NET source code contains process injector
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Contains functionality to compare user and computer (likely to detect sandboxes)
Contains functionality to inject code into remote processes
Creates a thread in another existing process (thread injection)
Found suspicious powershell code related to unpacking or dynamic code loading
Hooks files or directories query functions (used to hide files and directories)
Hooks processes query functions (used to hide processes)
Hooks registry keys query functions (used to hide registry keys)
Injects a PE file into a foreign processes
Injects code into the Windows Explorer (explorer.exe)
Installs new ROOT certificates
Machine Learning detection for sample
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Queries sensitive service information (via WMI, MSSMBios_RawSMBiosTables, often done to detect sandboxes)
Queries temperature or sensor information (via WMI often done to detect virtual machines)
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: Potential WinAPI Calls Via CommandLine
Suspicious powershell command line found
Very long command line found
Writes to foreign memory regions
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1436542 Sample: Install.exe Startdate: 06/05/2024 Architecture: WINDOWS Score: 100 37 Antivirus / Scanner detection for submitted sample 2->37 39 Multi AV Scanner detection for submitted file 2->39 41 .NET source code references suspicious native API functions 2->41 43 11 other signatures 2->43 7 powershell.exe 2 15 2->7         started        10 Install.exe 1 2->10         started        process3 signatures4 45 Writes to foreign memory regions 7->45 47 Modifies the context of a thread in another process (thread injection) 7->47 49 Found suspicious powershell code related to unpacking or dynamic code loading 7->49 51 Injects a PE file into a foreign processes 7->51 12 dllhost.exe 1 7->12         started        15 conhost.exe 7->15         started        process5 signatures6 53 Injects code into the Windows Explorer (explorer.exe) 12->53 55 Contains functionality to inject code into remote processes 12->55 57 Writes to foreign memory regions 12->57 59 3 other signatures 12->59 17 lsass.exe 12->17 injected 20 svchost.exe 12->20 injected 22 svchost.exe 12->22 injected 25 34 other processes 12->25 process7 dnsIp8 29 Installs new ROOT certificates 17->29 31 Writes to foreign memory regions 17->31 33 Queries sensitive service information (via WMI, MSSMBios_RawSMBiosTables, often done to detect sandboxes) 20->33 35 Queries temperature or sensor information (via WMI often done to detect virtual machines) 20->35 27 192.168.2.5 unknown unknown 22->27 signatures9
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc/
Threat name:
Win32.Trojan.R77RootKit
Create hunting rule
Status:
Malicious
First seen:
2023-12-02 06:08:15 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
29 of 38 (76.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=urrdwnhy2cpvg3tnryxqn5xn7m4xle4owdmze7tm2l7zyvjund6a._file
Verdict:
malicious
Result
Malware family:
n/a
Score:
  10/10
Tags:
bootkit evasion persistence
Link:
https://tria.ge/reports/240505-2vhwpsgf3w/
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Enumerates connected drives
Writes to the Master Boot Record (MBR)
Checks BIOS information in registry
Sets service image path in registry
Modifies security service
Suspicious use of NtCreateUserProcessOtherParentProcess
Unpacked files
SH256 hash:
4fe8bbdb5141c1be3c1e4960d1ba2aa49c0a3aa9b6e1316fccbe6f7bff7831ae
MD5 hash:
d9ea0a60267fdc954275906dadb48b80
SHA1 hash:
a4db8b34991d63cfcc4147cfe6538f840464091f
Link:
https://www.unpac.me/results/55527944-957e-42d6-a4c3-9f48c0f65816/
SH256 hash:
a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc
MD5 hash:
152e3f07bbaf88fb8b097ba05a60df6e
SHA1 hash:
c4638921bb140e7b6a722d7c4d88afa7ed4e55c8
Link:
https://www.unpac.me/results/55527944-957e-42d6-a4c3-9f48c0f65816/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a4623b34f8d0/report/overview.html
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/a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MALWARE_Win_R77
Create hunting rule
Author:ditekSHen
Description:Detects r77 rootkit
Rule name:meth_peb_parsing
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Rootkit_R77_be403e3c
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/elastic-security-labs-steps-through-the-r77-rootkit
Rule name:Windows_Rootkit_R77_d0367e28
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/elastic-security-labs-steps-through-the-r77-rootkit
Rule name:Windows_Rootkit_R77_ee853c9f
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/elastic-security-labs-steps-through-the-r77-rootkit

File information

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

Web download

Executable exe a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc

(this sample)

  
Delivery method
Distributed via web download

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
CHECK_TRUST_INFORequires Elevated Execution (level:requireAdministrator)high
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
ole32.dll::CoInitializeSecurity
WIN_CRYPT_APIUses Windows Crypt APIADVAPI32.dll::CryptAcquireContextW
ADVAPI32.dll::CryptGenRandom
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegSetValueExW

Comments