MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3bd5892cdc82dc4576eaf2735edb57182ae8b91c8067be305d4e801197d390cc. 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


Maldoc score: 5


Intelligence 14 IOCs YARA 5 File information Comments

SHA256 hash: 3bd5892cdc82dc4576eaf2735edb57182ae8b91c8067be305d4e801197d390cc
SHA3-384 hash: 3893a289e7feea963a26ff1a98964daca6e5d8cc9a8bdd110441e90fa2f17cb3d88a72ad09419b7484cbefc23a925a32
SHA1 hash: 6346e143368edbb5a23c8eea9698be2c266311b3
MD5 hash: 090e1dfdcbf2185788ea14cd113cc39f
humanhash: mirror-sweet-autumn-nevada
File name:12543_0008858249_FWDOUTSTANDING_20200604.doc
Download: download sample
Signature RemcosRAT
File size:61'952 bytes
First seen:2022-04-20 06:44:36 UTC
Last seen:2022-04-20 07:44:44 UTC
File type:Word file doc
MIME type:application/msword
ssdeep 768:cAuIiy1a9Tq1aBs8jCjuHF7Y89AOEUYqyxrINSrCqxw+tCc27I/:cAFMm1aidiFk89ABrbr1xrt/2
TLSH T165535CDDF2C2C4BBE12942B5E983C7A6B3BC3E292D1293172574371F3C75924C661269
Reporter @abuse_ch
Tags:doc RemcosRAT

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: 5
OLE dump
Sections: 11

The following OLE sections have been found using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
24096 bytesDocumentSummaryInformation
34096 bytesSummaryInformation
47133 bytes1Table
532978 bytesData
6367 bytesMacros/PROJECT
741 bytesMacros/PROJECTwm
81773 bytesMacros/VBA/ThisDocument
92435 bytesMacros/VBA/_VBA_PROJECT
10513 bytesMacros/VBA/dir
114096 bytesWordDocument
OLE vba
TypeKeywordDescription
AutoExecAutoOpenRuns when the Word document is opened
IOCTRY.msiExecutable file name
SuspiciousCreateObjectMay create an OLE object
SuspiciouswindowsMay enumerate application windows (if combined with Shell.Application object)

Intelligence


File Origin
# of uploads :
2
# of downloads :
223
Origin country :
FR FR
Mail intelligence
No data
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3bd5892cdc82dc4576eaf2735edb57182ae8b91c8067be305d4e801197d390cc.doc
Verdict:
Suspicious activity
Analysis date:
2022-04-20 16:12:19 UTC
Tags:
macros macros-on-open generated-doc

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
True
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Creating a window
–°reating synchronization primitives
DNS request
Creating a file in the Windows subdirectories
Creating a file in the %temp% subdirectories
Launching a process
Creating a process with a hidden window
Moving a file to the %temp% subdirectory
Creating a process from a recently created file
Running batch commands
Using the Windows Management Instrumentation requests
Result
Verdict:
Malicious
File Type:
Legacy Word File with Macro
Alert level:
85%
Payload URLs
URL
File name
https://filebin.net/rf43v6qzghbj7h7b/TRY.msi
ThisDocument
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
advpack.dll cmd.exe control.exe expand.exe explorer.exe fingerprint macros macros-on-open rundll32.exe setupapi.dll shell32.dll
Label:
Malicious
Suspicious Score:
  9.9/10
Score Malicious:
1%
Score Benign:
%
Result
Verdict:
MALICIOUS
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Document With Few Pages
Document contains between one and three pages of content. Most malicious documents are sparse in page count.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Result
Threat name:
Detection:
malicious
Classification:
expl.troj
Score:
100 / 100
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Document contains OLE streams with names of living off the land binaries
Document contains OLE streams with PE executables
Found malware configuration
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 submitted file
Powershell drops PE file
Yara detected Remcos RAT
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 611840 Sample: 12543_0008858249_FWDOUTSTAN... Startdate: 20/04/2022 Architecture: WINDOWS Score: 100 73 Multi AV Scanner detection for domain / URL 2->73 75 Found malware configuration 2->75 77 Malicious sample detected (through community Yara rule) 2->77 79 9 other signatures 2->79 9 msiexec.exe 87 31 2->9         started        13 WINWORD.EXE 46 41 2->13         started        15 rundll32.exe 2->15         started        process3 dnsIp4 67 filebin.net 185.47.40.36, 443, 49742, 49775 REDPILL-LINPRORedpillLinproNO Norway 9->67 69 situla.bitbit.net 87.238.33.8, 443, 49744 REDPILL-LINPRORedpillLinproNO Norway 9->69 53 C:\Windows\Installer\MSIFECD.tmp, PE32 9->53 dropped 55 C:\Windows\Installer\MSI847A.tmp, PE32 9->55 dropped 57 C:\Windows\Installer\MSI1064.tmp, PE32 9->57 dropped 17 msiexec.exe 5 9->17         started        71 192.168.2.1 unknown unknown 13->71 59 C:\Users\user\...\~DF3D7E64A57D9B524A.TMP, Composite 13->59 dropped file5 process6 process7 19 TRY.exe 1 3 17->19         started        21 expand.exe 8 17->21         started        24 icacls.exe 1 17->24         started        26 2 other processes 17->26 file8 28 cmd.exe 1 19->28         started        47 C:\...\bb2cb0e0b15f2f48a7107e59f4aa2fc6.tmp, PE32+ 21->47 dropped 49 C:\Users\user\AppData\...\TRY.exe (copy), PE32+ 21->49 dropped 30 conhost.exe 21->30         started        32 conhost.exe 24->32         started        34 conhost.exe 26->34         started        36 conhost.exe 26->36         started        process9 process10 38 powershell.exe 14 17 28->38         started        42 powershell.exe 23 28->42         started        45 conhost.exe 28->45         started        dnsIp11 61 filebin.net 38->61 63 87.238.33.7, 443, 49776 REDPILL-LINPRORedpillLinproNO Norway 38->63 65 situla.bitbit.net 38->65 51 C:\Users\user\AppData\Local\Temp\...\TRY.exe, PE32 38->51 dropped 81 Powershell drops PE file 42->81 file12 signatures13
Threat name:
Win32.Trojan.Valyria
Status:
Malicious
First seen:
2022-04-20 03:17:27 UTC
File Type:
Document
Extracted files:
17
AV detection:
12 of 25 (48.00%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:remcos botnet:try discovery macro macro_on_action persistence rat
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies data under HKEY_USERS
Modifies registry class
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
Drops file in Windows directory
Adds Run key to start application
Enumerates connected drives
Loads dropped DLL
Modifies file permissions
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
bambam.hopto.org:2311

YARA Signatures


MalareBazaar uses YARA rules from several public and non-public repositories, such as Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious proccess dumps they may create. Please note that only results from TLP:WHITE rules are being displayeyd.

Rule name:BitcoinAddress
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:malware_shellcode_hash
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:Office_AutoOpen_Macro
Author:Florian Roth
Description:Detects an Microsoft Office file that contains the AutoOpen Macro function
Rule name:SUSP_Doc_WindowsInstaller_Call_Feb22_1
Author:Nils Kuhnert
Description:Triggers on docfiles executing windows installer. Used for deploying ThinBasic scripts.
Reference:https://inquest.net/blog/2022/02/24/dangerously-thinbasic
Rule name:susp_lure_xls_WindowsInstaller_Feb2021_1
Author:Nils Kuhnert
Description:Triggers on docfiles executing windows installer. Used for deploying ThinBasic scripts.
Reference:https://twitter.com/threatinsight/status/1497355737844133895

File information


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

Comments