MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4df3907640f596ab2f05793362a19de2cd01b05b20fd142f46cc47dd61c901c. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a4df3907640f596ab2f05793362a19de2cd01b05b20fd142f46cc47dd61c901c
SHA3-384 hash: bc3f660e6e27b985c45a183f43c11a5dee496bbbb1408cacc6d8c08e7889b405da650928590cfa255760b61d1f0505c9
SHA1 hash: cd7dc07960c6f1c3099dc34720492d90cd6702a3
MD5 hash: c8b3de31f6b091cb0cf300cbc208fb4b
humanhash: butter-high-social-island
File name:BL-070820.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:342'528 bytes
First seen:2020-08-08 08:04:43 UTC
Last seen:2020-08-08 08:54:40 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 3072:V/Fi7O397EyQMWxsIMT31v1x/okjXrLpRnKRgzAtFNMv:LJ7JQMQ7MT31/okjbLD/ctF
Threatray 775 similar samples on MalwareBazaar
TLSH D674D813A96C89B6DF38A33D10141CC5A1F41D4C2AC9B21A47B8BD7DE93D5225E1FE2E
Reporter abuse_ch
Tags:AsyncRAT exe nVpn RAT


Avatar
abuse_ch
Malspam distributing AsyncRAT:

From: Michela Luriani <michela.lurianl@bleuline.it >
Subject: Qouation Inquiry from Bleuline Limited
Attachment: BL-070820.iso (contains "BL-070820.exe")

AsyncRAT C2:
185.165.153.32:8824

Hosted on nVpn:

% Information related to '185.165.153.0 - 185.165.153.255'

% Abuse contact for '185.165.153.0 - 185.165.153.255' is 'abuse@privacyfirst.sh'

inetnum: 185.165.153.0 - 185.165.153.255
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-EU2
country: EU
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
org: ORG-TPP6-RIPE
status: ASSIGNED PA
mnt-by: PRIVACYFIRST-MNT
created: 2019-10-18T12:14:26Z
last-modified: 2020-07-28T20:37:37Z
source: RIPE

Intelligence

File Origin
# of uploads :
2
# of downloads :
69
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AsyncRat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/42054/
Detection(s):
SecuriteInfo.com.Variant.Bulz.33647.19300.7278.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %temp% directory
Running batch commands
Launching a process
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Result
Threat name:
AsyncRAT
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/415700
Signature
Allocates memory in foreign processes
Connects to a pastebin service (likely for C&C)
Creates an autostart registry key pointing to binary in C:\Windows
Injects a PE file into a foreign processes
Sigma detected: Add file from suspicious location to autostart registry
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AsyncRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 260099 Sample: BL-070820.exe Startdate: 08/08/2020 Architecture: WINDOWS Score: 80 39 Yara detected AsyncRAT 2->39 41 Sigma detected: Add file from suspicious location to autostart registry 2->41 43 Connects to a pastebin service (likely for C&C) 2->43 45 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->45 7 BL-070820.exe 7 2->7         started        10 pcalua.exe 1 2->10         started        12 pcalua.exe 1 1 2->12         started        process3 file4 29 C:\Users\user\AppData\Roaming\ppdf.exe, PE32 7->29 dropped 31 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 7->31 dropped 33 C:\Users\user\...\ppdf.exe:Zone.Identifier, ASCII 7->33 dropped 14 ppdf.exe 2 7->14         started        17 cmd.exe 1 7->17         started        19 ppdf.exe 3 10->19         started        process5 signatures6 49 Writes to foreign memory regions 14->49 51 Allocates memory in foreign processes 14->51 53 Injects a PE file into a foreign processes 14->53 21 AddInProcess32.exe 15 2 14->21         started        24 reg.exe 1 1 17->24         started        27 conhost.exe 17->27         started        process7 dnsIp8 35 185.165.153.32, 49742, 49743, 49744 DAVID_CRAIGGG Netherlands 21->35 37 pastebin.com 104.23.99.190, 443, 49741 CLOUDFLARENETUS United States 21->37 47 Creates an autostart registry key pointing to binary in C:\Windows 24->47 signatures9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a4df3907640f596ab2f05793362a19de2cd01b05b20fd142f46cc47dd61c901c/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-08 08:06:08 UTC
AV detection:
21 of 29 (72.41%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=utptsb3eb5mwvmxqk6jtmkqz3ywnagyfwih5cqxuntch3vq4saoa._file
Verdict:
suspicious
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AsyncRAT
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682be0853ccd6f60deb69d27941a628758c4e13e7d2e6ee95a95f415f3a9f0c6
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847b3580cba59e7f4b453488c263544f3c481027d2ddf4f9f3988d84afc35c85
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a4df5e9015f70b47dc4f2e6bae0fbeb9d108979e0cda7ef54aa123a0d33bdf8b
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c8cc7c1a1210a082960b929c3598521979e16c1c6f5626b8ad29b9618ab5e18c
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d0d47f1c08031d4297f713a98d6ca969009df8c0f637110622190d4ff9727106
AsyncRAT
+ 765 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
rat persistence family:asyncrat
Link:
https://tria.ge/reports/200808-gdqy5vz5sx/
Behaviour
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetThreadContext
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Executes dropped EXE
Async RAT payload
AsyncRat
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
0.70
Link:
https://yomi.yoroi.company/submissions/a4df3907640f596ab2f05793362a19de2cd01b05b20fd142f46cc47dd61c901c

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:win_asyncrat_j1
Create hunting rule
Author:Johannes Bader @viql
Description:detects AsyncRAT

File information

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

Malspam

AsyncRAT

iso 215d4b7554ac2687d1619c7cc32cbd269a186bc4b8e5a58dd48c52cf1d922ae6

AsyncRAT

Executable exe a4df3907640f596ab2f05793362a19de2cd01b05b20fd142f46cc47dd61c901c

(this sample)

  
Dropped by
MD5 1fd7faf6584ab17cd0cc8185c9bcee16
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/42054/
  
Dropped by
SHA256 215d4b7554ac2687d1619c7cc32cbd269a186bc4b8e5a58dd48c52cf1d922ae6

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