MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5189b2a9e69b48ef464f8f59ab722717ab162eb33ab7f493791f13e28d59473e. 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: 12


Maldoc score: 5


Intelligence 12 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5189b2a9e69b48ef464f8f59ab722717ab162eb33ab7f493791f13e28d59473e
SHA3-384 hash: 4fa9cb6cb069e1d80b479b638b23b207b2bdae6c677031b62d35dd700c27109f7d154b60f648ccbb7da10c3b674d9b70
SHA1 hash: c9586e701a4bb90423f0e4ccf09290b2642c1d39
MD5 hash: e5f86454862a7288a5fceb215872cd6f
humanhash: bluebird-early-skylark-edward
File name:Shahini Ferramenta.doc
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:71'168 bytes
First seen:2022-03-30 05:32:40 UTC
Last seen:2022-03-30 06:42:28 UTC
File type:Word file doc
MIME type:application/msword
ssdeep 768:yhAnDF20o0G0y0i0g06U8VzPqxw+tfaiZniZ5iZ:cAnDF+U8Uxrtf
TLSH T1C263257079F2C647D65E0439A94A8A2B79B4EC965F9392873EB73F1976310E00721F2C
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

MalwareBazaar was able to identify 29 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2280 bytesDocumentSummaryInformation
3432 bytesSummaryInformation
412736 bytes1Table
56147 bytesData
6368 bytesMacros/PROJECT
741 bytesMacros/PROJECTwm
81748 bytesMacros/VBA/ThisDocument
92470 bytesMacros/VBA/_VBA_PROJECT
10520 bytesMacros/VBA/dir
1177 bytesObjectPool/_1710045727/CompObj
1220 bytesObjectPool/_1710045727/Ole
135 bytesObjectPool/_1710045727/Ole10ItemName
144516 bytesObjectPool/_1710045727/Ole10Native
156 bytesObjectPool/_1710045727/ObjInfo
164564 bytesObjectPool/_1710045727/PRINT
1777 bytesObjectPool/_1710045728/CompObj
1820 bytesObjectPool/_1710045728/Ole
195 bytesObjectPool/_1710045728/Ole10ItemName
204516 bytesObjectPool/_1710045728/Ole10Native
216 bytesObjectPool/_1710045728/ObjInfo
224564 bytesObjectPool/_1710045728/PRINT
2377 bytesObjectPool/_1710045729/CompObj
2420 bytesObjectPool/_1710045729/Ole
255 bytesObjectPool/_1710045729/Ole10ItemName
264516 bytesObjectPool/_1710045729/Ole10Native
276 bytesObjectPool/_1710045729/ObjInfo
284564 bytesObjectPool/_1710045729/PRINT
299774 bytesWordDocument
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
AutoExecDocument_OpenRuns when the Word or Publisher document is opened
IOCnew.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 :
233
Origin country :
n/a
Vendor Threat Intelligence
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
True
Detection(s):
TwinWave.EvilDoc.PKIllDownRodeo.20220302.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.PKIllDownRodeo.M2.20220302.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.HighwaytoTheDangerZone.20210325.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Creating a window
Сreating 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
Result
Verdict:
Malicious
File Type:
Legacy Word File with Macro
Link:
https://app.docguard.net/5189b2a9e69b48ef464f8f59ab722717ab162eb33ab7f493791f13e28d59473e/results/dashboard
Payload URLs
URL
File name
https://filebin.net/chd313qsab7e4ta9/new.msi
ThisDocument
Document image
Image:
Download PNG
Document image
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
advpack.dll cmd.exe control.exe expand.exe explorer.exe fingerprint macros macros-on-open rundll32.exe setupapi.dll shell32.dll
Link:
https://www.filescan.io/uploads/6243eb8f9253b276b7a400d7/reports/a392b3b1-1b3c-40eb-9530-0f0f34e72557/overview
Label:
Malicious
Suspicious Score:
5.8/10
Score Malicious:
58%
Score Benign:
42%
Link:
https://www.malware.ai/gui/files/?id=fd0cb731-b07f-46b3-93cd-f3036093e603
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/5189b2a9e69b48ef464f8f59ab722717ab162eb33ab7f493791f13e28d59473e
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 Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
expl.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/967331
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
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
Document contains OLE streams with names of living off the land binaries
Document contains OLE streams with PE executables
Found malware configuration
Installs a global keyboard hook
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Sigma detected: Remote Thread Creation in Suspicious Targets
Sigma detected: Suspicious Remote Thread Created
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 599823 Sample: Shahini Ferramenta.doc Startdate: 30/03/2022 Architecture: WINDOWS Score: 100 72 achimumuazi.hopto.org 2->72 96 Found malware configuration 2->96 98 Malicious sample detected (through community Yara rule) 2->98 100 Antivirus detection for URL or domain 2->100 102 8 other signatures 2->102 10 msiexec.exe 87 31 2->10         started        14 WINWORD.EXE 46 41 2->14         started        16 mspaint.exe 27 2 2->16         started        19 2 other processes 2->19 signatures3 process4 dnsIp5 74 filebin.net 185.47.40.36, 443, 49743, 49760 REDPILL-LINPRORedpillLinproNO Norway 10->74 76 situla.bitbit.net 87.238.33.8, 443, 49747, 49761 REDPILL-LINPRORedpillLinproNO Norway 10->76 62 C:\Windows\Installer\MSIC21C.tmp, PE32 10->62 dropped 64 C:\Windows\Installer\MSI9F1F.tmp, PE32 10->64 dropped 66 C:\Windows\Installer\MSI1FFB.tmp, PE32 10->66 dropped 21 msiexec.exe 5 10->21         started        68 C:\Users\user\...\Shahini Ferramenta.doc.LNK, MS 14->68 dropped 70 C:\Users\user\...\~DFAF981D31FA1CC519.TMP, Composite 14->70 dropped 23 splwow64.exe 14->23         started        25 splwow64.exe 14->25         started        84 Installs a global keyboard hook 16->84 file6 signatures7 process8 process9 27 new.EXE 1 3 21->27         started        29 mspaint.exe 21->29         started        32 expand.exe 8 21->32         started        35 3 other processes 21->35 file10 37 cmd.exe 1 27->37         started        104 Installs a global keyboard hook 29->104 56 C:\Users\user\AppData\...\new.EXE (copy), PE32+ 32->56 dropped 58 C:\...\6a0938561b3fc948aa9bf1b90310e954.tmp, PE32+ 32->58 dropped 39 conhost.exe 32->39         started        41 conhost.exe 35->41         started        43 conhost.exe 35->43         started        45 conhost.exe 35->45         started        signatures11 process12 process13 47 NEW-FILE.exe 2 3 37->47         started        51 powershell.exe 14 18 37->51         started        54 conhost.exe 37->54         started        dnsIp14 78 achimumuazi.hopto.org 79.134.225.76, 2311, 49765, 49771 FINK-TELECOM-SERVICESCH Switzerland 47->78 86 Antivirus detection for dropped file 47->86 88 Multi AV Scanner detection for dropped file 47->88 90 Machine Learning detection for dropped file 47->90 94 5 other signatures 47->94 80 filebin.net 51->80 82 situla.bitbit.net 51->82 60 C:\Users\user\AppData\Local\...60EW-FILE.exe, PE32 51->60 dropped 92 Powershell drops PE file 51->92 file15 signatures16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5189b2a9e69b48ef464f8f59ab722717ab162eb33ab7f493791f13e28d59473e/
Threat name:
Win32.Trojan.Mutisedow
Create hunting rule
Status:
Malicious
First seen:
2022-03-29 15:27:10 UTC
File Type:
Document
Extracted files:
47
AV detection:
10 of 41 (24.39%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kge3fkpgtneo6rspr5m2w4rhc6vrmlvthk37je3zd4j6fdkzi47a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:tuesday discovery macro macro_on_action persistence rat
Link:
https://tria.ge/reports/220330-f8vlrschcp/
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:
achimumuazi.hopto.org:2311
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/5189b2a9e69b/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/5189b2a9e69b48ef464f8f59ab722717ab162eb33ab7f493791f13e28d59473e

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:malware_shellcode_hash
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect shellcode api hash value
Rule name:SUSP_Doc_WindowsInstaller_Call_Feb22_1
Create hunting rule
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
Create hunting rule
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