MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d5a8b6cb7b39d6f71ce67c6c8e17030079f2778087ee12c0ad45bd823f7bd53c. 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



AsyncRAT


Vendor detections: 13


Intelligence 13 IOCs YARA 6 File information Comments

SHA256 hash: d5a8b6cb7b39d6f71ce67c6c8e17030079f2778087ee12c0ad45bd823f7bd53c
SHA3-384 hash: 18b266e7af42270bbf1a78ea761db840f948534867288adc0b2c861bd14ee536f41eeaf66be6010cb94cab2006e86377
SHA1 hash: 1b33772f2acc9e6673a2922587b00db86f5fba01
MD5 hash: dbbb611daf3abd47972ae4faf5d54c95
humanhash: india-kentucky-sink-lion
File name:ms.bin
Download: download sample
Signature AsyncRAT
File size:1'068'032 bytes
First seen:2021-07-17 20:35:57 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 9222d372923baed7aa9dfa28449a94ea (4 x NanoCore, 4 x AsyncRAT, 2 x AgentTesla)
ssdeep 24576:jmclmMhCG3sDOdqnRrLVvjD9puJ7li2OLUC0Dc/rP0flxwy:jmzG3sJpRvjhU7I2OLZD/LUr
Threatray 1'036 similar samples on MalwareBazaar
TLSH T19F35221173D1C137C27A16B05DF176B2863BF6261721E7872B844A3FAE226D18F613DA
Reporter @BushidoToken
Tags:Astro Grep Async AsyncRAT exe RAT

Intelligence


File Origin
# of uploads :
1
# of downloads :
122
Origin country :
GB GB
Mail intelligence
No data
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
astro-grep-setup.exe.doc
Verdict:
Malicious activity
Analysis date:
2021-07-16 21:13:56 UTC
Tags:
macros macros-on-open

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
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.
Result
Threat name:
AsyncRAT
Detection:
malicious
Classification:
troj.evad
Score:
52 / 100
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Connects to a pastebin service (likely for C&C)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Sigma detected: Regsvr32 Anomaly
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 450276 Sample: ms.bin Startdate: 17/07/2021 Architecture: WINDOWS Score: 52 60 Antivirus / Scanner detection for submitted sample 2->60 62 Multi AV Scanner detection for submitted file 2->62 64 Yara detected AsyncRAT 2->64 66 5 other signatures 2->66 8 ms.exe 3 2->8         started        11 astro-grep.exe 15 2 2->11         started        process3 dnsIp4 36 C:\Users\user\AppData\...\ASTRO-GREP.EXE, PE32 8->36 dropped 38 C:\Users\user\...\ASTROGREP_SETUP_V4.4.7.EXE, PE32 8->38 dropped 15 ASTRO-GREP.EXE 7 8->15         started        19 ASTROGREP_SETUP_V4.4.7.EXE 12 46 8->19         started        50 185.195.232.251, 49728, 49729, 49735 ESAB-ASSE Sweden 11->50 52 pastebin.com 104.23.98.190, 443, 49727 CLOUDFLARENETUS United States 11->52 70 Antivirus detection for dropped file 11->70 72 Machine Learning detection for dropped file 11->72 file5 signatures6 process7 file8 40 C:\Users\user\AppData\...\astro-grep.exe, PE32 15->40 dropped 54 Antivirus detection for dropped file 15->54 56 Machine Learning detection for dropped file 15->56 58 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 15->58 21 cmd.exe 1 15->21         started        24 cmd.exe 1 15->24         started        42 C:\Users\user\AppData\Local\...\nsDialogs.dll, PE32 19->42 dropped 44 C:\Users\user\AppData\Local\...\System.dll, PE32 19->44 dropped 46 C:\Users\user\AppData\Local\...\StartMenu.dll, PE32 19->46 dropped 48 8 other files (none is malicious) 19->48 dropped signatures9 process10 signatures11 68 Uses schtasks.exe or at.exe to add and modify task schedules 21->68 26 conhost.exe 21->26         started        28 schtasks.exe 1 21->28         started        30 astro-grep.exe 2 24->30         started        32 conhost.exe 24->32         started        34 timeout.exe 1 24->34         started        process12
Threat name:
Win32.Hacktool.Binder
Status:
Malicious
First seen:
2021-07-17 20:36:05 UTC
AV detection:
41 of 46 (89.13%)
Threat level:
  1/5
Result
Malware family:
asyncrat
Score:
  10/10
Tags:
family:asyncrat rat
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
NSIS installer
Enumerates physical storage devices
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Executes dropped EXE
Async RAT payload
AsyncRat
Malware Config
C2 Extraction:
null:null
Unpacked files
SH256 hash:
d5a8b6cb7b39d6f71ce67c6c8e17030079f2778087ee12c0ad45bd823f7bd53c
MD5 hash:
dbbb611daf3abd47972ae4faf5d54c95
SHA1 hash:
1b33772f2acc9e6673a2922587b00db86f5fba01
Detections:
win_asyncrat_w0

YARA Signatures


MalareBazaar uses YARA rules from several public and non-public repositories, such as Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious proccess dumps they may create. Please note that only results from TLP:WHITE rules are being displayeyd.

Rule name:asyncrat
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research
Rule name:INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse
Author:ditekSHen
Description:Detects file containing reversed ASEP Autorun registry keys
Rule name:Ins_NSIS_Buer_Nov_2020_1
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:Malware_QA_update
Author:Florian Roth
Description:VT Research QA uploaded malware - file update.exe
Reference:VT Research QA
Rule name:win_asyncrat_j1
Author:Johannes Bader @viql
Description:detects AsyncRAT
Rule name:win_asyncrat_w0
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research

File information


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

Comments