MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fb42713cea74ad7a0d4579b86d6c213b25b1f8594019787da3f2152e436fd8fd. 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


Maldoc score: 7


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

SHA256 hash: fb42713cea74ad7a0d4579b86d6c213b25b1f8594019787da3f2152e436fd8fd
SHA3-384 hash: b95bf3045e895179b2863db392c136fd0520b04740be304f750216ed2ddd603db1ed26ff6fb86786c34dcc90e919ddbd
SHA1 hash: 43ad6336b9d7868373ec53202122a1e6c3bfe4c9
MD5 hash: cff12cf815ba1c9b5dcc65baafa52e38
humanhash: rugby-montana-jersey-india
File name:Remittance Advice.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:72'192 bytes
First seen:2021-02-20 08:09:57 UTC
Last seen:2021-02-20 10:03:23 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 1536:ZAk3hOdsylKlgxopeiBNhZFGzE+cL2kdAFx7vof2cDSI0Va7l86GZ47m:Wk3hOdsylKlgxopeiBNhZFGzE+cL2kde
TLSH 4C635A71F641C918E54A47758EE2DADA2326FC929EC78207336CB32E5DB0FD98D03616
Reporter abuse_ch
Tags:RAT RemcosRAT xls


Avatar
abuse_ch
RemcosRAT payload URL:
http://greenpayindia.com/king/file/ach/login/Attack.jpg
http://greenpayindia.com/king/file/ach/login/Protected Client.js

RemcosRAT C2:
isrealpicker.duckdns.org:672 (185.19.85.159)

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 7
Application name is Microsoft Excel
Office document is in OLE format
Office document contains VBA Macros
OLE dump

MalwareBazaar was able to identify 14 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
455094 bytesWorkbook
5410 bytes_VBA_PROJECT_CUR/PROJECT
662 bytes_VBA_PROJECT_CUR/PROJECTwm
7977 bytes_VBA_PROJECT_CUR/VBA/Sheet1
83722 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92846 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
101279 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
11132 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
12444 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
13247 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
14523 bytes_VBA_PROJECT_CUR/VBA/dir
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
AutoExecWorkbook_ActivateRuns when the Excel Workbook is opened
SuspiciousRunMay run an executable file or a system command
SuspiciousGetObjectMay get an OLE object with a running instance
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
2
# of downloads :
255
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/118077/
Detection(s):
TwinWave.GetObjectCaptainFantasy.20210204.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
DNS request
Sending an HTTP GET request
Creating a file in the %AppData% directory
Creating a process from a recently created file
Launching a process
Running batch commands
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/fb42713cea74ad7a0d4579b86d6c213b25b1f8594019787da3f2152e436fd8fd/results/dashboard
Document image
Image:
Download PNG
Document image
Result
Verdict:
MALICIOUS
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/613212
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Creates autostart registry keys with suspicious values (likely registry only malware)
Delayed program exit found
Detected Remcos RAT
Document contains an embedded VBA macro which may execute processes
Document exploit detected (process start blacklist hit)
Found malware configuration
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Remcos
System process connects to network (likely due to code injection or exploit)
Uses cmd line tools excessively to alter registry or file data
Uses dynamic DNS services
Very long command line found
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 355622 Sample: Remittance Advice.xls Startdate: 20/02/2021 Architecture: WINDOWS Score: 100 58 isrealpicker.duckdns.org 2->58 64 Found malware configuration 2->64 66 Malicious sample detected (through community Yara rule) 2->66 68 Detected Remcos RAT 2->68 70 8 other signatures 2->70 10 EXCEL.EXE 12 8 2->10         started        13 wscript.exe 1 2->13         started        15 wscript.exe 1 2->15         started        signatures3 process4 signatures5 84 Very long command line found 10->84 86 Document exploit detected (process start blacklist hit) 10->86 17 powershell.exe 12 7 10->17         started        88 Wscript starts Powershell (via cmd or directly) 13->88 21 powershell.exe 7 13->21         started        24 cmd.exe 13->24         started        26 cmd.exe 15->26         started        28 powershell.exe 7 15->28         started        process6 dnsIp7 56 greenpayindia.com 162.241.120.180, 49165, 49166, 49167 UNIFIEDLAYER-AS-1US United States 17->56 52 C:\Users\user\AppData\Roaming\notepad.js, ASCII 17->52 dropped 30 wscript.exe 1 17->30         started        72 Uses cmd line tools excessively to alter registry or file data 21->72 74 Writes to foreign memory regions 21->74 76 Injects a PE file into a foreign processes 21->76 33 notepad.exe 21->33         started        35 reg.exe 24->35         started        37 reg.exe 26->37         started        file8 signatures9 process10 signatures11 90 Wscript starts Powershell (via cmd or directly) 30->90 92 Very long command line found 30->92 39 powershell.exe 7 30->39         started        43 cmd.exe 30->43         started        process12 dnsIp13 60 greenpayindia.com 39->60 78 Writes to foreign memory regions 39->78 80 Injects a PE file into a foreign processes 39->80 45 notepad.exe 2 3 39->45         started        82 Uses cmd line tools excessively to alter registry or file data 43->82 50 reg.exe 1 43->50         started        signatures14 process15 dnsIp16 62 isrealpicker.duckdns.org 185.19.85.159, 49169, 49170, 49171 DATAWIRE-ASCH Switzerland 45->62 54 C:\Users\user\AppData\Roaming\...\logs.dat, ASCII 45->54 dropped 94 System process connects to network (likely due to code injection or exploit) 45->94 96 Contains functionality to steal Chrome passwords or cookies 45->96 98 Contains functionality to capture and log keystrokes 45->98 102 4 other signatures 45->102 100 Creates autostart registry keys with suspicious values (likely registry only malware) 50->100 file17 signatures18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fb42713cea74ad7a0d4579b86d6c213b25b1f8594019787da3f2152e436fd8fd/
Threat name:
Script-Macro.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2021-02-20 08:10:07 UTC
AV detection:
13 of 47 (27.66%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7nbhcphkoswxudkfpg4g23bbhms3d6cziamxq7nd6iks4q3p3d6q._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos macro macro_on_action persistence rat xlm
Link:
https://tria.ge/reports/210220-17cbr3ctds/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Blocklisted process makes network request
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
isrealpicker.duckdns.org:672
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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

Malspam

RemcosRAT

Excel file xls fb42713cea74ad7a0d4579b86d6c213b25b1f8594019787da3f2152e436fd8fd

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/host/greenpayindia.com/
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/118077/

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