MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c52d747cc20d321a0185798c328468b564f9c5a213270ad07861fa7cc147fdda. 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: 13


Maldoc score: 8


Intelligence 13 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c52d747cc20d321a0185798c328468b564f9c5a213270ad07861fa7cc147fdda
SHA3-384 hash: aa911eaa72a3a3587d49039e1e2c2fd5d43c3ece318ff41d23b98d2f810a25460f18512f4bbeafd7652a764348017369
SHA1 hash: d80196b1fb3002a531b8279575a02e4f3d6d42c6
MD5 hash: 30875285b66ef1ca21e1bc6ec361dbd0
humanhash: april-bravo-berlin-emma
File name:ACH Payment Notification.xls
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:33'792 bytes
First seen:2022-04-28 06:10:58 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:Xrgk3hOdsylKlgxopeiBNhZFGzE+cL2kdAJcLEMo6Rl1PumZ7C:XEk3hOdsylKlgxopeiBNhZFGzE+cL2kY
TLSH T1E8E25EA2B786D90AC95907764CE7C6EA3327FC515FA3834B3389F71E1F71A808902657
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 15 sections in this file using oledump:

Section IDSection sizeSection name
1108 bytesCompObj
2244 bytesDocumentSummaryInformation
3220 bytesSummaryInformation
417199 bytesWorkbook
5455 bytes_VBA_PROJECT_CUR/PROJECT
680 bytes_VBA_PROJECT_CUR/PROJECTwm
7991 bytes_VBA_PROJECT_CUR/VBA/Sheet1
81615 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
91711 bytes_VBA_PROJECT_CUR/VBA/UYouW
102743 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
111584 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
12151 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
13214 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
14220 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
15561 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
SuspiciousChrMay attempt to obfuscate specific strings (use option --deobf to deobfuscate)
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)

Intelligence

File Origin
# of uploads :
1
# of downloads :
195
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/267379/
Detection(s):
SecuriteInfo.com.Macro.Exec-2.UNOFFICIAL
Create hunting rule

TwinWave.GetObjectStringManipulationDontMessAroundWithJim.20200804.UNOFFICIAL
Create hunting rule

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

Sanesecurity.Badmacro.Doc.htrev.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
Searching for the window
Creating a window
Сreating synchronization primitives
Launching a process
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/c52d747cc20d321a0185798c328468b564f9c5a213270ad07861fa7cc147fdda/results/dashboard
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
macros
Link:
https://www.filescan.io/uploads/626a300a801e66012b12c99b/reports/95aec391-25bd-4d7e-ba10-048e040691d2/overview
Label:
Benign
Suspicious Score:
4.9/10
Score Malicious:
49%
Score Benign:
51%
Link:
https://www.malware.ai/gui/files/?id=55f11db8-c828-420a-9739-f9a0e009886d
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/c52d747cc20d321a0185798c328468b564f9c5a213270ad07861fa7cc147fdda
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/984536
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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
Delayed program exit found
Document contains an embedded VBA macro which may execute processes
Document exploit detected (process start blacklist hit)
Drops VBS files to the startup folder
Found malware configuration
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Notepad Making Network Connection
Sigma detected: Suspicious PowerShell Cmdline
Sigma detected: Suspicious PowerShell Sub Processes
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Very long command line found
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected Costura Assembly Loader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 617032 Sample: ACH Payment Notification.xls Startdate: 28/04/2022 Architecture: WINDOWS Score: 100 43 google.com 2->43 57 Multi AV Scanner detection for domain / URL 2->57 59 Found malware configuration 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 13 other signatures 2->63 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 39 C:\Users\...\ACH Payment Notification.xls, Composite 10->39 dropped 69 Suspicious powershell command line found 10->69 18 powershell.exe 12 7 10->18         started        22 iexplore.exe 14 14->22         started        signatures6 process7 dnsIp8 45 gotovacoil.com 72.48.234.249, 49171, 49172, 49173 GRANDECOM-AS1US United States 18->45 37 C:\Users\user\AppData\Local\...\notapad.vbs, ASCII 18->37 dropped 24 wscript.exe 1 18->24         started        file9 process10 signatures11 65 Wscript starts Powershell (via cmd or directly) 24->65 67 Very long command line found 24->67 27 powershell.exe 7 24->27         started        31 powershell.exe 7 24->31         started        process12 dnsIp13 47 gotovacoil.com 27->47 71 Writes to foreign memory regions 27->71 73 Injects a PE file into a foreign processes 27->73 33 notepad.exe 2 27->33         started        75 Drops VBS files to the startup folder 31->75 signatures14 process15 dnsIp16 41 freshdirect.dvrlists.com 185.19.85.174, 119, 49175 DATAWIRE-ASCH Switzerland 33->41 49 System process connects to network (likely due to code injection or exploit) 33->49 51 Contains functionality to steal Chrome passwords or cookies 33->51 53 Contains functionality to inject code into remote processes 33->53 55 3 other signatures 33->55 signatures17
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c52d747cc20d321a0185798c328468b564f9c5a213270ad07861fa7cc147fdda/
Threat name:
Win32.Downloader.Powdow
Create hunting rule
Status:
Malicious
First seen:
2022-04-27 18:23:42 UTC
File Type:
Document
Extracted files:
19
AV detection:
4 of 41 (9.76%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yuwxi7gcbuzbuamfpggdfbdiwvsptrnccmtqvudymh5hzqkh7xna._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost rat
Link:
https://tria.ge/reports/220428-gxk4mabbd4/
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:
freshdirect.dvrlists.com:119
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c52d747cc20d/report/overview.html
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/c52d747cc20d321a0185798c328468b564f9c5a213270ad07861fa7cc147fdda

File information

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

Malspam

RemcosRAT

Excel file xls c52d747cc20d321a0185798c328468b564f9c5a213270ad07861fa7cc147fdda

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/267379/

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