MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee
SHA3-384 hash: 5aae10e91e96c393ae61514d460a2dec0e89fe8cf9d9790345a675afe8992bba801e1d3d96f4935261319857053c4627
SHA1 hash: 43a733cb58aaefffefec0720f1b93dae766a09e1
MD5 hash: 90b7fc34be5837101ff125bdbe99806a
humanhash: one-bluebird-chicken-arkansas
File name:90b7fc34be5837101ff125bdbe99806a
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:880'640 bytes
First seen:2022-07-28 16:42:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'648 x AgentTesla, 19'452 x Formbook, 12'201 x SnakeKeylogger)
ssdeep 24576:gqWVEvLZ2lYqN1C3RoT0J+MI0XeLhExp/UHA8y:gLm2OqsRkmAhErsHA
TLSH T1B7152310336D56ACFFAE43745C8183682F3DD34270B3C24A6AD619BA1DB37B15A4279B
TrID 63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.3% (.SCR) Windows screen saver (13101/52/3)
9.0% (.EXE) Win64 Executable (generic) (10523/12/4)
5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter zbetcheckin
Tags:32 exe RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
390
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
http://45.85.190.156/260/vbc.exe
Verdict:
Malicious activity
Analysis date:
2022-07-28 16:45:59 UTC
Tags:
opendir loader rat remcos keylogger trojan formbook stealer
Link:
https://app.any.run/tasks/7ef28180-1a05-4bd0-9931-f0bee83ea0a1

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/294958/
Detection(s):
SecuriteInfo.com.Trojan.Inject4.38260.2664.4459.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Сreating synchronization primitives
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a process with a hidden window
Running batch commands
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
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.
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/f520b639-ed2f-42d6-99ce-667ccbf2fa30
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1042654
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Delayed program exit found
Injects a PE file into a foreign processes
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Yara detected AntiVM3
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 675147 Sample: fzrae38wlP Startdate: 28/07/2022 Architecture: WINDOWS Score: 100 56 Multi AV Scanner detection for domain / URL 2->56 58 Malicious sample detected (through community Yara rule) 2->58 60 Antivirus detection for dropped file 2->60 62 8 other signatures 2->62 10 fzrae38wlP.exe 3 2->10         started        14 oos.exe 3 2->14         started        16 oos.exe 2 2->16         started        18 oos.exe 2 2->18         started        process3 file4 48 C:\Users\user\AppData\...\fzrae38wlP.exe.log, ASCII 10->48 dropped 68 Contains functionality to steal Chrome passwords or cookies 10->68 70 Contains functionality to inject code into remote processes 10->70 72 Contains functionality to steal Firefox passwords or cookies 10->72 74 Delayed program exit found 10->74 20 fzrae38wlP.exe 5 4 10->20         started        76 Multi AV Scanner detection for dropped file 14->76 78 Machine Learning detection for dropped file 14->78 80 Injects a PE file into a foreign processes 14->80 23 oos.exe 2 15 14->23         started        27 oos.exe 16->27         started        29 oos.exe 18->29         started        signatures5 process6 dnsIp7 42 C:\Users\user\AppData\Roaming\oos.exe, PE32 20->42 dropped 44 C:\Users\user\...\oos.exe:Zone.Identifier, ASCII 20->44 dropped 46 C:\Users\user\AppData\Local\...\install.vbs, data 20->46 dropped 31 wscript.exe 1 20->31         started        50 xpremcuz300622.ddns.net 171.22.30.253, 3542, 49762 CMCSUS Germany 23->50 52 geoplugin.net 178.237.33.50, 49763, 80 ATOM86-ASATOM86NL Netherlands 23->52 54 192.168.2.1 unknown unknown 23->54 66 Installs a global keyboard hook 23->66 file8 signatures9 process10 process11 33 cmd.exe 1 31->33         started        process12 35 oos.exe 2 33->35         started        38 conhost.exe 33->38         started        signatures13 64 Injects a PE file into a foreign processes 35->64 40 oos.exe 35->40         started        process14
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2022-07-28 09:36:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
14
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=oa5u2uc42bocfdqm62a2kqrgfxeyeeopfzhleyicfa5vw7x2fhxa._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:xp persistence rat
Link:
https://tria.ge/reports/220728-t78nwshdb8/
Behaviour
Modifies registry class
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
Remcos
Malware Config
C2 Extraction:
xpremcuz300622.ddns.net:3542
Unpacked files
SH256 hash:
e5db62eb9602eb4e7b1d2eda848b5f65f1ac35bc90e9127f4777b09493f1fcec
MD5 hash:
9705fef6bfdfbb7e9546fb9a9d1e4afc
SHA1 hash:
e74765ab9298b57cbad7927d693261c78075169d
Detections:
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/50bff276-e5b8-4090-90cd-55d36b6254c5/
Parent samples :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 hash:
4f21b76a0b944651e8d02767eb93268c0930d472a8564229e0b2bc7a914708aa
MD5 hash:
cf9539af3dd26c2b805297315ae91031
SHA1 hash:
d6d09871a515cdf26ee89424ed49775f73966218
Link:
https://www.unpac.me/results/50bff276-e5b8-4090-90cd-55d36b6254c5/
SH256 hash:
899b2b75071cb55cad243e5118be7cafafed9a43a5c8942109a80e1427b52f9a
MD5 hash:
d167b13ab50adb48da1ef0b489107c80
SHA1 hash:
5c98f17818efa100c30a918c0a65cbaa349f1839
Link:
https://www.unpac.me/results/50bff276-e5b8-4090-90cd-55d36b6254c5/
SH256 hash:
44743dda09e3d58941f2330a4e3d11641a9cd1cb41306f30dd2575a17ccaec19
MD5 hash:
4e48d643ecc61d79cbff0d725c81ad88
SHA1 hash:
9c53f29dcfb790898ec9d90b8a77547064786e4e
Link:
https://www.unpac.me/results/50bff276-e5b8-4090-90cd-55d36b6254c5/
SH256 hash:
703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee
MD5 hash:
90b7fc34be5837101ff125bdbe99806a
SHA1 hash:
43a733cb58aaefffefec0720f1b93dae766a09e1
Link:
https://www.unpac.me/results/50bff276-e5b8-4090-90cd-55d36b6254c5/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/703b4d505cd0/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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.

Web download

RemcosRAT

Executable exe 703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2262271/
Cape
Cape
https://www.capesandbox.com/analysis/294958/

Comments


Avatar
zbet commented on 2022-07-28 16:42:14 UTC

url : hxxp://45.85.190.156/260/vbc.exe