MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8ce8a49d849245023b3a5085b5309be738fb56797a31530ecf79d50aae8139f. 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


RemcosRAT


Vendor detections: 9


Intelligence 9 IOCs YARA 9 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b8ce8a49d849245023b3a5085b5309be738fb56797a31530ecf79d50aae8139f
SHA3-384 hash: e4373774226f26c551f10c11b89ec62967e39884783357fe5659ee9b8fe44419d0d04317858aae2b036de6d24e456f9b
SHA1 hash: b7fbf1e495288513d36b2db634c5abfe296a953c
MD5 hash: de725d136fe2f90514e4d4e6f7a041e9
humanhash: friend-mango-enemy-blue
File name:de725d13_by_Libranalysis
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'511'424 bytes
First seen:2021-05-19 11:02:21 UTC
Last seen:2021-05-20 06:16:06 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:X2Yg4fOYGMkFw9b6uhKsvVro+FgCNu3JfVFdgzbh6eTYlugSiUKTFJlw8SUazEu:XhPfOrFw7mImJdI/hCluPiUKTB1bazE
Threatray 221 similar samples on MalwareBazaar
TLSH 5E65F1ACF25062C8D1A63DBA9FD2DFB04B65DC7B2583C15E1EC33E8B74AC6929801D15
Reporter Libranalysis
Tags:RemcosRAT


Avatar
Libranalysis
Uploaded as part of the sample sharing project

Intelligence

File Origin
# of uploads :
2
# of downloads :
120
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
de725d13_by_Libranalysis
Verdict:
No threats detected
Analysis date:
2021-05-19 11:15:24 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/04b3eea1-9d4c-4e5d-afbd-0c82ee41526b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/158551/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Adding an access-denied ACE
Launching a process
Creating a process with a hidden window
Creating a window
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:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/784836
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to detect sleep reduction / modifications
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Creates an undocumented autostart registry key
Creates HTML files with .exe extension (expired dropper behavior)
Delayed program exit found
Detected Remcos RAT
Drops PE files to the document folder of the user
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Injects files into Windows application
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Sigma detected: WScript or CScript Dropper
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 417232 Sample: de725d13_by_Libranalysis Startdate: 19/05/2021 Architecture: WINDOWS Score: 100 82 Found malware configuration 2->82 84 Malicious sample detected (through community Yara rule) 2->84 86 Antivirus detection for dropped file 2->86 88 11 other signatures 2->88 10 de725d13_by_Libranalysis.exe 1 4 2->10         started        14 Synaptics.exe 2->14         started        16 EXCEL.EXE 2->16         started        18 2 other processes 2->18 process3 file4 70 C:\Users\user\AppData\...\ttOL7mKyoMOC.exe, PE32 10->70 dropped 108 Creates an undocumented autostart registry key 10->108 110 Hides that the sample has been downloaded from the Internet (zone.identifier) 10->110 112 Injects a PE file into a foreign processes 10->112 114 Contains functionality to detect sleep reduction / modifications 10->114 20 de725d13_by_Libranalysis.exe 1 5 10->20         started        72 C:\Users\user\AppData\...\KXEd6bf8Q4Db.exe, PE32 14->72 dropped 23 Synaptics.exe 14->23         started        116 Injects files into Windows application 16->116 signatures5 process6 file7 56 C:\...\._cache_de725d13_by_Libranalysis.exe, PE32 20->56 dropped 58 C:\ProgramData\Synaptics\Synaptics.exe, PE32 20->58 dropped 60 C:\ProgramData\Synaptics\RCXDBA5.tmp, PE32 20->60 dropped 25 Synaptics.exe 3 20->25         started        29 ._cache_de725d13_by_Libranalysis.exe 4 4 20->29         started        62 C:\ProgramData\...\._cache_Synaptics.exe, PE32 23->62 dropped process8 file9 64 C:\Users\user\AppData\...\afoWNfcsllaM.exe, PE32 25->64 dropped 96 Antivirus detection for dropped file 25->96 98 Multi AV Scanner detection for dropped file 25->98 100 Drops PE files to the document folder of the user 25->100 106 4 other signatures 25->106 31 Synaptics.exe 25->31         started        66 C:\Users\user\AppData\Roaming\...\remcos.exe, PE32 29->66 dropped 68 C:\Users\user\AppData\Local\...\install.vbs, data 29->68 dropped 102 Machine Learning detection for dropped file 29->102 104 Contains functionality to inject code into remote processes 29->104 35 wscript.exe 1 29->35         started        signatures10 process11 dnsIp12 76 freedns.afraid.org 50.23.197.95, 49732, 80 SOFTLAYERUS United States 31->76 78 googlehosted.l.googleusercontent.com 172.217.20.1, 443, 49733, 49734 GOOGLEUS United States 31->78 80 13 other IPs or domains 31->80 48 C:\Users\user\Documents\BJZFPPWAPT\~$cache1, PE32 31->48 dropped 50 C:\Users\user\Desktop\._cache_Synaptics.exe, PE32 31->50 dropped 52 C:\Users\user\AppData\Local\...\jvmObinh.exe, PE32 31->52 dropped 54 2 other malicious files 31->54 dropped 37 ._cache_Synaptics.exe 31->37         started        40 cmd.exe 1 35->40         started        file13 process14 signatures15 90 Antivirus detection for dropped file 37->90 92 Multi AV Scanner detection for dropped file 37->92 94 Machine Learning detection for dropped file 37->94 42 remcos.exe 2 250 40->42         started        46 conhost.exe 40->46         started        process16 dnsIp17 74 64.44.139.178, 7200 NEXEONUS United States 42->74 118 Antivirus detection for dropped file 42->118 120 Multi AV Scanner detection for dropped file 42->120 122 Machine Learning detection for dropped file 42->122 124 4 other signatures 42->124 signatures18
Gathering data
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-05-19 11:03:14 UTC
File Type:
PE (.Net Exe)
Extracted files:
43
AV detection:
36 of 47 (76.60%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xdhiusoyjesfai5tuuefwuyjxzzy7nlhs6rrkmhm66ovbkxicopq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
01b1f2041aaba6815657a7a7409a0843868459fa3cabf0c377a83862ac88a27f
RemcosRAT
0b71fa3fa8549d6a826faaeb1be86b5f866242f35afdb0c0bc7a8ba6c35981e7
RemcosRAT
3c0df5607ab1e7bf906ce2be36ee0bb970c26baf19710f0c195ca9356a2d918f
RemcosRAT
5f06da67169389577ec237bfb0c3e0e9203833048f48081deed7b6201ad18c27
RemcosRAT
6a27b78dfc13a80e82d04620260cd32423d2ee7c6b9644d2de19fb9b660ecfd4
RemcosRAT
a465bb35f4e7bafb2fea17156c39daee286e49c3f10463ecb8d29766e2d0b200
RemcosRAT
a5ae2e0f9a8f1c50e21ea93f4a195097753cd16436ffa4e946add38da873c8cb
RemcosRAT
d2d9b66c9aad0e6cc20a786a89299a8b4a65a5a344db369dfd7bfbad3fb40b55
RemcosRAT
e0282af4b6dc2361d472e2c8bae5e3c54d4564400980ec27587300cf1b7464e0
RemcosRAT
f0896ba259cc40a67474db857cbca2cd43099f5b49be45c3e3a3a34a06765b7f
RemcosRAT
+ 211 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos macro persistence rat
Link:
https://tria.ge/reports/210519-qbqp1llgce/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Suspicious Office macro
Modifies WinLogon for persistence
Remcos
Malware Config
C2 Extraction:
64.44.139.178:7200
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/b8ce8a49d849245023b3a5085b5309be738fb56797a31530ecf79d50aae8139f

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:ach_RemcosRAT
Create hunting rule
Author:abuse.ch
Rule name:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:HKTL_NET_GUID_wsManager
Create hunting rule
Author:Arnim Rupp
Description:Detects c# red/black-team tools via typelibguid
Reference:https://github.com/guillaC/wsManager
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:pe_imphash
Create hunting rule
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_remcos_g0
Create hunting rule
Author:Daniel Plohmann <daniel.plohmann<at>fkie.fraunhofer.de>

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/158551/

Comments


Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-05-19 12:01:50 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0009] Anti-Behavioral Analysis::Virtual Machine Detection
1) [B0023] Execution::Install Additional Program