MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51. 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: 10


Intelligence 10 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51
SHA3-384 hash: 9a9d8e609fc62402fef3a38adca4ac0c870b07ff68b580539f59e57762af1fd132c5616d19cb75bcaca8daac9350b0a1
SHA1 hash: ebf1183f3a47bfae97239e931ff856a139d4165d
MD5 hash: 20421df94d144740eab515221a45d26e
humanhash: bakerloo-five-moon-magazine
File name:Cobro Juridico_055613636_4874191282_01958044356528390_673332273_117258353370705_58841967892234_pdf.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:695'000 bytes
First seen:2020-10-19 07:28:53 UTC
Last seen:2020-10-19 09:08:16 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:0WTNX2Q93llTO38EHVdMYbeJqhx6pBH8EXIDI9hGoeVxeyignVH9:bTd2QFlO3HVdMYbQIx63GI9coLyjd
TLSH 0DE4D6FE15DA783AA9B1157A4801E64768F4A2732E99D33C9DF082CCD1031513B5BEEE
Reporter abuse_ch
Tags:exe Outlook RAT RemcosRAT

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:Oct 19 01:06:29 2020 GMT
Valid to:Oct 19 01:06:29 2021 GMT
Serial number: 1C9BB09C7499DAD22BD8B4F706A67C08
Thumbprint Algorithm:SHA256
Thumbprint: 5EDD0D4B5F5EE05157DE7E435259D255D51B5E2E64736413941E4A75B4E112E6
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: NAM04-SN1-obe.outbound.protection.outlook.com
Sending IP: 40.92.11.53
From: TRACTOCAMIONES NEIVA <ventas_tracto@hotmail.es>
Subject: COBRO JURIDICO SERFINANZA
Attachment: Cobro Juridico_055613636_4874191282_01958044356528390_673332273_117258353370705_58841967892234.tgz (contains "Cobro Juridico_055613636_4874191282_01958044356528390_673332273_117258353370705_58841967892234_pdf.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
98
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/72794/
Detection(s):
SecuriteInfo.com.FileRepMalware.3978.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Launching a process
Creating a process with a hidden window
Creating a window
Adding an access-denied ACE
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Creating a process from a recently created file
Launching the default Windows debugger (dwwin.exe)
Deleting a recently created file
Running batch commands
DNS request
Connection attempt
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process by context flags manipulation
Setting a global event handler for the keyboard
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/495030
Signature
.NET source code references suspicious native API functions
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
Country aware sample found (crashes after keyboard check)
Detected Remcos RAT
Hides threads from debuggers
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
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
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 299995 Sample: 2234_pdf.exe Startdate: 19/10/2020 Architecture: WINDOWS Score: 100 68 databasepropersonombrecomercialideasearchwords.services 2->68 80 Malicious sample detected (through community Yara rule) 2->80 82 Multi AV Scanner detection for submitted file 2->82 84 Detected Remcos RAT 2->84 86 6 other signatures 2->86 12 2234_pdf.exe 2 2->12         started        15 PxoServicesNet.exe.exe 2 2->15         started        17 PxoServicesNet.exe.exe 2->17         started        signatures3 process4 signatures5 88 Contains functionality to steal Chrome passwords or cookies 12->88 90 Contains functionality to capture and log keystrokes 12->90 92 Contains functionality to inject code into remote processes 12->92 94 Contains functionality to steal Firefox passwords or cookies 12->94 19 2234_pdf.exe 4 5 12->19         started        22 WerFault.exe 23 9 12->22         started        24 timeout.exe 1 12->24         started        96 Hides threads from debuggers 15->96 98 Injects a PE file into a foreign processes 15->98 26 timeout.exe 15->26         started        28 PxoServicesNet.exe.exe 15->28         started        30 WerFault.exe 15->30         started        32 timeout.exe 17->32         started        34 PxoServicesNet.exe.exe 17->34         started        36 WerFault.exe 17->36         started        process6 file7 62 C:\Users\user\...\PxoServicesNet.exe.exe, PE32 19->62 dropped 64 C:\...\PxoServicesNet.exe.exe:Zone.Identifier, ASCII 19->64 dropped 38 wscript.exe 1 19->38         started        66 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 22->66 dropped 40 conhost.exe 24->40         started        42 conhost.exe 26->42         started        44 conhost.exe 32->44         started        process8 process9 46 cmd.exe 1 38->46         started        process10 48 PxoServicesNet.exe.exe 2 46->48         started        51 conhost.exe 46->51         started        signatures11 72 Multi AV Scanner detection for dropped file 48->72 74 Machine Learning detection for dropped file 48->74 76 Contains functionality to steal Chrome passwords or cookies 48->76 78 4 other signatures 48->78 53 PxoServicesNet.exe.exe 48->53         started        56 timeout.exe 1 48->56         started        58 WerFault.exe 48->58         started        process12 dnsIp13 70 databasepropersonombrecomercialideasearchwords.services 186.169.63.66, 49744, 49745, 49749 COLOMBIATELECOMUNICACIONESSAESPCO Colombia 53->70 60 conhost.exe 56->60         started        process14
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-10-19 01:54:21 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
19 of 29 (65.52%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=zjrmlt4on4zgbw7bljdj5eazoyjk7ccd3cl7mxd73xuhkvhlvziq._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
persistence rat family:remcos
Link:
https://tria.ge/reports/201019-gjd88yjpwj/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
ServiceHost packer
Remcos
Malware Config
C2 Extraction:
databasepropersonombrecomercialideasearchwords.services:7580
Unpacked files
SH256 hash:
ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51
MD5 hash:
20421df94d144740eab515221a45d26e
SHA1 hash:
ebf1183f3a47bfae97239e931ff856a139d4165d
Link:
https://www.unpac.me/results/78bf49a4-6cf2-46c8-ab9e-63e6475c2aad/
SH256 hash:
06a11e446f638941c04ca40829e7690b9c592825a1f3d6fea135dd0312965423
MD5 hash:
40fbe161a0b1db162ac4361ee40d46da
SHA1 hash:
4b5c5707bc17f59cf2179a92807b5d46512c5fcf
Link:
https://www.unpac.me/results/78bf49a4-6cf2-46c8-ab9e-63e6475c2aad/
SH256 hash:
e588c10b000c4cbcd395b3e172aef1d2907b5521f62b3d19f6a2e333ed8f79bf
MD5 hash:
debd1e09b70f64de9a945fda95c9d971
SHA1 hash:
6bb2ee91532ed77fd23f086c0c74d25fb7855f83
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/78bf49a4-6cf2-46c8-ab9e-63e6475c2aad/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
Link:
https://yomi.yoroi.company/submissions/ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51

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: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: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

rar bfb1ce81ea67d3e4534a44873c68b3ac3579b563c1df1c491d768ae7fcde48f2

RemcosRAT

Executable exe ca62c5cf8e6f3260dbe15a469e90197612af8843d897f65c7fdde87554ebae51

(this sample)

  
Dropped by
MD5 67d63e2dd1029f70fd21ffc4cf65be45
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/72794/
  
Dropped by
SHA256 bfb1ce81ea67d3e4534a44873c68b3ac3579b563c1df1c491d768ae7fcde48f2

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