MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a2b745b8a979a49f8f7361caff58117a45e9da4149042299b96f68e3ff3998b1. 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: 5


Intelligence 5 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a2b745b8a979a49f8f7361caff58117a45e9da4149042299b96f68e3ff3998b1
SHA3-384 hash: 1586f6c3152daa91c8a3945eb484c89c3117b70806adab25dbb0a85ded0f8ced928534a4aa58ed8ecc0f564210a80f48
SHA1 hash: 20fa57285028f7a34ea31bddd51e8a154754ecfb
MD5 hash: fed2e20f4d9c1416379107039be7d111
humanhash: alaska-nine-september-potato
File name:SO12145970.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:557'221 bytes
First seen:2020-10-28 08:08:49 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 7c2c71dfce9a27650634dc8b1ca03bf0 (160 x Loki, 58 x Formbook, 55 x Adware.Generic)
ssdeep 12288:aanQuFRZfTf5XO6xx18koXmuSny4fk57Pl96YllkvKXIA5M22h8tnielBWKSCw:yA9xKkoXm+4Sjl9Nnky5MvhsnZlfSh
TLSH 7FC423329960D0D7E4B207B10C7A7E194BD67C30A8A11E4E0BA4BDF52AF35E3964B54F
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: vps.charypublications.com
Sending IP: 67.211.216.5
From: Colleen Vaught <colleen.vaught@esinlt.com>
Subject: Proforma SO12145970 - Famsa
Attachment: SO12145970.IMG (contains "SO12145970.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
99
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
PUA.Win.Downloader.Soft32downloader-6691270-0
Create hunting rule

SecuriteInfo.com.Artemis162931E90DCF.4593.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Sending a UDP request
Creating a file in the %temp% directory
Launching a process
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/514712
Signature
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Detected Remcos RAT
Hijacks the control flow in another process
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
Sigma detected: Remcos
Uses dynamic DNS services
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 306466 Sample: SO12145970.exe Startdate: 28/10/2020 Architecture: WINDOWS Score: 100 32 Malicious sample detected (through community Yara rule) 2->32 34 Multi AV Scanner detection for dropped file 2->34 36 Multi AV Scanner detection for submitted file 2->36 38 5 other signatures 2->38 7 SO12145970.exe 24 2->7         started        process3 file4 22 C:\Users\user\...\TallboyPhotogravure.dll, PE32 7->22 dropped 24 C:\Users\user\...\vjswebmigrationui.dll, PE32 7->24 dropped 26 C:\Users\user\AppData\...\vdtflavuil.dll, PE32 7->26 dropped 28 3 other files (none is malicious) 7->28 dropped 10 rundll32.exe 7->10         started        process5 signatures6 40 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 10->40 42 Hijacks the control flow in another process 10->42 44 Maps a DLL or memory area into another process 10->44 13 cmd.exe 10->13         started        16 cmd.exe 2 5 10->16         started        process7 dnsIp8 46 Contains functionality to steal Chrome passwords or cookies 13->46 48 Contains functionality to capture and log keystrokes 13->48 50 Contains functionality to inject code into remote processes 13->50 52 Contains functionality to steal Firefox passwords or cookies 13->52 30 namonanwa.duckdns.org 79.134.225.8, 1199, 49747 FINK-TELECOM-SERVICESCH Switzerland 16->30 20 C:\Users\user\AppData\Roaming\...\logs.dat, ASCII 16->20 dropped 54 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 16->54 file9 signatures10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a2b745b8a979a49f8f7361caff58117a45e9da4149042299b96f68e3ff3998b1/
Threat name:
Win32.Backdoor.Rescoms
Create hunting rule
Status:
Malicious
First seen:
2020-10-28 02:26:02 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=uk3ulofjpgsj7d3tmhfp6warpjc6twsbjeccfgnzn5uoh7zztcyq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos rat
Link:
https://tria.ge/reports/201028-ae87m9pyqs/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
NSIS installer
Program crash
Loads dropped DLL
Drops startup file
Blacklisted process makes network request
Remcos
Malware Config
C2 Extraction:
namonanwa.duckdns.org:1199
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: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: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:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Malspam

RemcosRAT

img 787f1f7310802d1e1c8e4f394b260bd840ad6ea08eb3c711b01cb7cb3ad402d6

RemcosRAT

Executable exe a2b745b8a979a49f8f7361caff58117a45e9da4149042299b96f68e3ff3998b1

(this sample)

  
Dropped by
MD5 029fe0a658f63a775c5da9cd3148a0db
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 787f1f7310802d1e1c8e4f394b260bd840ad6ea08eb3c711b01cb7cb3ad402d6

Comments