MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a399cf91b76479c1dd9381dfffb1521b69822894d8862ef00273878546b2a9d7. 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


XpertRAT


Vendor detections: 11


Intelligence 11 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a399cf91b76479c1dd9381dfffb1521b69822894d8862ef00273878546b2a9d7
SHA3-384 hash: e6d6b4a39dc4c8b2969f071a08e24298e63e10837c7624d25ac4109561b2d1040c79cf61c94a4c996a00a72976d211c1
SHA1 hash: 6118f6e8a6fc209cce15c8019d5684902579e12d
MD5 hash: d14619b1c5ca20c8e78749949ce6855b
humanhash: avocado-blossom-sweet-wolfram
File name:RFQ#00439811.exe
Download: download sample
Signature XpertRAT
Create hunting rule
File size:507'392 bytes
First seen:2021-11-23 09:01:39 UTC
Last seen:2021-11-23 11:06:52 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:dr+StD00JbA1pQXQPeb6wDTjXG2qg6fEivWpyG:nC0JbUGQPeuIjXG2qg68RpyG
TLSH T1C7B4F1543B55EA52D8681733C8EA80840331AA456993C77FBCDD335E5D127E3BB02AEB
Reporter lowmal3
Tags:exe XpertRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
148
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ#00439811.exe
Verdict:
Malicious activity
Analysis date:
2021-11-23 09:48:39 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/40be74cc-be20-4443-88af-cd3e0ca4a7a5

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Gathering data
Detection(s):
SecuriteInfo.com.IL.Trojan.MSILZilla.11065.4017.17798.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/619cae0ef36138de3f36b9ae/reports/ee69681c-9e17-4109-a8fe-ea505fcd3299/overview
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/eecb424c-9590-43ce-b1c0-6a056b56970f
Result
Threat name:
XpertRAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/894555
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Changes security center settings (notifications, updates, antivirus, firewall)
Creates an undocumented autostart registry key
Creates autostart registry keys with suspicious names
Detected unpacking (creates a PE file in dynamic memory)
Disables user account control notifications
Found malware configuration
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected AntiVM3
Yara detected Generic Dropper
Yara detected XpertRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 527040 Sample: RFQ#00439811.exe Startdate: 23/11/2021 Architecture: WINDOWS Score: 100 38 accessgran.ydns.eu 2->38 46 Multi AV Scanner detection for domain / URL 2->46 48 Found malware configuration 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 9 other signatures 2->52 8 RFQ#00439811.exe 3 2->8         started        12 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe 3 2->12         started        14 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe 2 2->14         started        16 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe 2 2->16         started        signatures3 process4 file5 34 C:\Users\user\...\RFQ#00439811.exe.log, ASCII 8->34 dropped 54 Detected unpacking (creates a PE file in dynamic memory) 8->54 56 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 8->56 18 RFQ#00439811.exe 1 1 8->18         started        58 Multi AV Scanner detection for dropped file 12->58 60 Machine Learning detection for dropped file 12->60 21 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe 1 12->21         started        23 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe 1 14->23         started        25 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe 14->25         started        27 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe 1 16->27         started        signatures6 process7 signatures8 42 Changes security center settings (notifications, updates, antivirus, firewall) 18->42 44 Disables user account control notifications 18->44 29 iexplore.exe 3 7 18->29         started        process9 dnsIp10 40 accessgran.ydns.eu 45.144.225.147, 6706 DEDIPATH-LLCUS Netherlands 29->40 36 R0W4O1A8-P5N3-X331-D1M0-A2W4Q6D8C2R6.exe, PE32 29->36 dropped 62 Creates an undocumented autostart registry key 29->62 64 Creates autostart registry keys with suspicious names 29->64 file11 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a399cf91b76479c1dd9381dfffb1521b69822894d8862ef00273878546b2a9d7/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-11-23 09:02:11 UTC
File Type:
PE (.Net Exe)
Extracted files:
11
AV detection:
25 of 45 (55.56%)
Threat level:
  5/5
Verdict:
malicious
Result
Malware family:
xpertrat
Create hunting rule
Score:
  10/10
Tags:
family:xpertrat evasion persistence rat trojan
Link:
https://tria.ge/reports/211123-kzge1acgd4/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System policy modification
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Maps connected drives based on registry
Checks BIOS information in registry
Windows security modification
Adds policy Run key to start application
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
UAC bypass
Windows security bypass
XpertRAT
Unpacked files
SH256 hash:
044076940d833e9b61b6ca8016f6d9270a55946cdd7aae3efa4739cd571d5873
MD5 hash:
b41f25f009eacdec7e4b9893e1bedbab
SHA1 hash:
1f7d2139d208f8d851531ceb1267c484775c1dbd
Detections:
win_xpertrat_a0
Create hunting rule
win_xpertrat_auto
Create hunting rule
Link:
https://www.unpac.me/results/01938879-f53a-4bc8-a6fd-b9d6b8abc75d/
Parent samples :
8ffc84f1b1316cbcf2e68048631900210632b86e14307c3835ad7a4286bf18d5
6bf55bc421fadfd6e0ffc426390796b1a9dc4afd1e53ec9b36395951f0f539eb
c5add9cb099cfea7574003d74a2f4ef075362ed2c70ade79aad6af0286115cb4
21553a3434749569bbb6dbf77da2d47a16828a09fdbbb93108b9cf314fb42add
a399cf91b76479c1dd9381dfffb1521b69822894d8862ef00273878546b2a9d7
SH256 hash:
08a2d4adf27ab56781163c381036212c822365b67c58e3bfdc92ed57738e886b
MD5 hash:
db682419f4f190e84beaf42951dd74a1
SHA1 hash:
cdeaf7d8d1284d18f2c36c5d7d11a29dbd344870
Link:
https://www.unpac.me/results/01938879-f53a-4bc8-a6fd-b9d6b8abc75d/
SH256 hash:
cb012888394e274b3f088c00b455516f9421cdfe4f7ba3bb6bdc5393e4cd4540
MD5 hash:
4a98e759fb60bb1154488dc6d678403b
SHA1 hash:
2838bd3a443140b1423049f2598254e85a05fe02
Link:
https://www.unpac.me/results/01938879-f53a-4bc8-a6fd-b9d6b8abc75d/
SH256 hash:
f30ca642597c059f9dbcc6cfea27687245fbcaf5456be0b7a4528d946f3a0a05
MD5 hash:
0f6349011cf5446131faf0cadbace87b
SHA1 hash:
0cd48b5cb5a0ca095043c333c9002ba5273e92e8
Link:
https://www.unpac.me/results/01938879-f53a-4bc8-a6fd-b9d6b8abc75d/
SH256 hash:
b088cb1b346e01c3a38775312c5548c4e27ed4788547dec83c727c16a2fbf634
MD5 hash:
26650972ded262b9e750b472e96c3eb7
SHA1 hash:
0db19a9ced8e8b368b28fcdded7273ad79e105cd
Detections:
win_xpertrat_a0
Create hunting rule
win_xpertrat_auto
Create hunting rule
Link:
https://www.unpac.me/results/01938879-f53a-4bc8-a6fd-b9d6b8abc75d/
SH256 hash:
a399cf91b76479c1dd9381dfffb1521b69822894d8862ef00273878546b2a9d7
MD5 hash:
d14619b1c5ca20c8e78749949ce6855b
SHA1 hash:
6118f6e8a6fc209cce15c8019d5684902579e12d
Link:
https://www.unpac.me/results/01938879-f53a-4bc8-a6fd-b9d6b8abc75d/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/a399cf91b764/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/a399cf91b76479c1dd9381dfffb1521b69822894d8862ef00273878546b2a9d7

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:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

XpertRAT

Executable exe a399cf91b76479c1dd9381dfffb1521b69822894d8862ef00273878546b2a9d7

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/208606/

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