MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 59ba6d5636e63e9dbdec9b92014e934537b2f64b5d40864a500dc53ee42714f8. 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: 8


Intelligence 12 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 59ba6d5636e63e9dbdec9b92014e934537b2f64b5d40864a500dc53ee42714f8
SHA3-384 hash: 4a34b6f5ad1067e5b243e858587f331db353eae3c645ea21291cd7bbabfedd07f7ae113408f60b4e1b173f4bc41b53d2
SHA1 hash: 89d518ebf57acc07a7cbd9a948335c481e954168
MD5 hash: fd26640516af160bc89aff8d0e461e36
humanhash: papa-september-utah-michigan
File name:PNC activepay ACH.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:36'864 bytes
First seen:2022-04-20 06:44:53 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:Amk3hOdsylKlgxopeiBNhZFGzE+cL2kdAJL2D/7ZYVH44XNvmcCR:Fk3hOdsylKlgxopeiBNhZFGzE+cL2kdP
TLSH T1C4F240A2B292D84AD995073A4CE7C7E63336FC516F53834B3289F71E1F71AC08A02657
TrID 46.5% (.XLS) Microsoft Excel sheet (alternate) (56500/1/4)
26.7% (.XLS) Microsoft Excel sheet (32500/1/3)
20.1% (.XLS) Microsoft Excel sheet (alternate) (24500/1/2)
6.5% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter abuse_ch
Tags:RemcosRAT xls

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: 8
OLE dump

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

Section IDSection sizeSection name
1108 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
418674 bytesWorkbook
5410 bytes_VBA_PROJECT_CUR/PROJECT
662 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
83819 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
92634 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
101841 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
11182 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
121277 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
13576 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
14519 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
SuspiciousGetObjectMay get an OLE object with a running instance
SuspiciousExecMay run an executable file or a system
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
238
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/264811/
Detection(s):
TwinWave.EvilDoc.RemcosBite.20220408.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RemcosBite.M2.20220408.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Heur.21945.10875.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.OdysseyAndBattle.20210707.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.TakeMeHomeTonight.20210923.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.OutRunThis.20220121.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a process from a recently created file
Launching a process
Searching for the window
Sending a custom TCP request
Creating a window
DNS request
Sending an HTTP GET request
Creating a file in the %temp% directory
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/59ba6d5636e63e9dbdec9b92014e934537b2f64b5d40864a500dc53ee42714f8/results/dashboard
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
macros
Link:
https://www.filescan.io/uploads/625fabf3eab80a7a6c484b6f/reports/7693609e-dd26-4a65-8f8b-a46fe117a535/overview
Label:
Malicious
Suspicious Score:
8.9/10
Score Malicious:
89%
Score Benign:
11%
Link:
https://www.malware.ai/gui/files/?id=02b477a6-edd1-454b-b7f1-25339f308ddb
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/59ba6d5636e63e9dbdec9b92014e934537b2f64b5d40864a500dc53ee42714f8
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
expl.evad
Score:
92 / 100
Link:
https://www.joesandbox.com/analysis/979347
Signature
Document contains an embedded VBA macro which may execute processes
Document exploit detected (process start blacklist hit)
Drops VBS files to the startup folder
Malicious sample detected (through community Yara rule)
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Suspicious PowerShell Cmdline
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suspicious powershell command line found
Very long command line found
Wscript starts Powershell (via cmd or directly)
Yara detected Costura Assembly Loader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 611835 Sample: PNC activepay ACH.xls Startdate: 20/04/2022 Architecture: WINDOWS Score: 92 45 google.com 2->45 51 Malicious sample detected (through community Yara rule) 2->51 53 Suspicious powershell command line found 2->53 55 Document contains an embedded VBA macro which may execute processes 2->55 57 6 other signatures 2->57 10 EXCEL.EXE 53 13 2->10         started        14 iexplore.exe 1 33 2->14         started        16 wscript.exe 2->16         started        signatures3 process4 file5 43 C:\Users\user\Desktop\PNC activepay ACH.xls, Composite 10->43 dropped 63 Suspicious powershell command line found 10->63 18 powershell.exe 12 7 10->18         started        22 iexplore.exe 14 14->22         started        signatures6 process7 dnsIp8 47 mckinneytighe.com 72.48.234.249, 49173, 49174, 49175 GRANDECOM-AS1US United States 18->47 41 C:\Users\user\AppData\Local\...\notepads.vbs, ASCII 18->41 dropped 24 wscript.exe 1 18->24         started        file9 process10 signatures11 59 Wscript starts Powershell (via cmd or directly) 24->59 61 Very long command line found 24->61 27 powershell.exe 7 24->27         started        30 powershell.exe 7 24->30         started        process12 dnsIp13 65 Drops VBS files to the startup folder 27->65 49 mckinneytighe.com 30->49 33 MSBuild.exe 30->33         started        35 MSBuild.exe 30->35         started        37 MSBuild.exe 30->37         started        39 2 other processes 30->39 signatures14 process15
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/59ba6d5636e63e9dbdec9b92014e934537b2f64b5d40864a500dc53ee42714f8/
Threat name:
Document-Office.Dropper.SDrop
Create hunting rule
Status:
Malicious
First seen:
2022-04-19 17:20:22 UTC
File Type:
Document
Extracted files:
17
AV detection:
8 of 41 (19.51%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lg5g2vrw4y7j3ppmtojactutiu33f5sllvaimssqbxct5zbhct4a._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:new money rat
Link:
https://tria.ge/reports/220420-hh2y9shgaq/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
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
Checks computer location settings
Blocklisted process makes network request
Process spawned unexpected child process
Remcos
Malware Config
C2 Extraction:
hawmans.cc.dvrlists.com:162
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.80
Link:
https://yomi.yoroi.company/submissions/59ba6d5636e63e9dbdec9b92014e934537b2f64b5d40864a500dc53ee42714f8

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:TA505_Maldoc_21Nov_2
Create hunting rule
Author:Arkbird_SOLG
Description:invitation (1).xls
Reference:https://twitter.com/58_158_177_102/status/1197432303057637377

File information

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

Malspam

RemcosRAT

Excel file xls 59ba6d5636e63e9dbdec9b92014e934537b2f64b5d40864a500dc53ee42714f8

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/264811/

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