MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b434a92f906fcd81718268f7465ea9a5ea3c6fdc5662bd8347fc52dd7984b3f6. 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: 4
| SHA256 hash: | b434a92f906fcd81718268f7465ea9a5ea3c6fdc5662bd8347fc52dd7984b3f6 |
|---|---|
| SHA3-384 hash: | b362766784ca17be90068649808a2a496e5f36b9c61a9f073ef7e0a0a1d8d4c5e7100f9ff20872a2774201c1b76cf281 |
| SHA1 hash: | aa63e9a462c19efbb1f83b775e6fbc35bf997255 |
| MD5 hash: | 49da121e2690d66a85d5b2b4eb9a07d9 |
| humanhash: | quebec-leopard-kansas-mirror |
| File name: | PURCHASE ORDER1 & 2.xls |
| Download: | download sample |
| Signature | RemcosRAT |
| File size: | 382'464 bytes |
| First seen: | 2023-12-18 18:52:57 UTC |
| Last seen: | Never |
| File type: |  xls |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 6144:ASgun2Q4YlLSmmeHZMhD6wM3XALQuEdxp7qXHdCmoeLk4jFUBsCBsuN/xdkpre9X:AS52WQmmme6v3QLQuEdxRq9Vp/RUBseR |
| TLSH | T16F8401007248C89DE2975BF969B7B19E500CBC733BC691CB6A88F70F8435F6B461B452 |
| 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: 4 |
OLE dump
MalwareBazaar was able to identify 21 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 114 bytes | CompObj |
| 2 | 244 bytes | DocumentSummaryInformation |
| 3 | 200 bytes | SummaryInformation |
| 4 | 94 bytes | MBD00220A45/CompObj |
| 5 | 62 bytes | MBD00220A45/Ole |
| 6 | 20409 bytes | MBD00220A45/CONTENTS |
| 7 | 94 bytes | MBD00220A46/CompObj |
| 8 | 62 bytes | MBD00220A46/Ole |
| 9 | 141190 bytes | MBD00220A46/CONTENTS |
| 10 | 113 bytes | MBD00220A47/CompObj |
| 11 | 22256 bytes | MBD00220A47/Package |
| 12 | 872 bytes | MBD00220A48/Ole |
| 13 | 179575 bytes | Workbook |
| 14 | 527 bytes | _VBA_PROJECT_CUR/PROJECT |
| 15 | 104 bytes | _VBA_PROJECT_CUR/PROJECTwm |
| 16 | 977 bytes | _VBA_PROJECT_CUR/VBA/Sheet1 |
| 17 | 977 bytes | _VBA_PROJECT_CUR/VBA/Sheet2 |
| 18 | 977 bytes | _VBA_PROJECT_CUR/VBA/Sheet3 |
| 19 | 985 bytes | _VBA_PROJECT_CUR/VBA/ThisWorkbook |
| 20 | 2644 bytes | _VBA_PROJECT_CUR/VBA/_VBA_PROJECT |
| 21 | 553 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:
| Type | Keyword | Description |
|---|---|---|
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
Intelligence
File Origin
# of uploads :
1
# of downloads :
336
Origin country :
NLVendor Threat Intelligence
Verdict:
Legit
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
False
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Sending a custom TCP request
Creating a window
Searching for the window
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Sending an HTTP GET request
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Payload URLs
URL
File name
http://85.195.105.118/msj/Microsoftdecidedtodeleteentirehistorycachecookieeverythingfromthepc.Doc
Embedded Ole
Behaviour
SuspiciousRTF detected
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
embedequation exploit macros shellcode sload
Verdict:
Malicious
Labled as:
CVE-2017-0199
Label:
Benign
Suspicious Score:
4.1/10
Score Malicious:
42%
Score Benign:
58%
Result
Threat name:
Remcos
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to inject code into remote processes
Contains functionality to modify clipboard data
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
Contains functionalty to change the wallpaper
Delayed program exit found
Document embeds suspicious OLE2 link
Excel sheet contains many unusual embedded objects
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Microsoft Office drops suspicious files
Microsoft Office launches external ms-search protocol handler (WebDAV)
Multi AV Scanner detection for dropped file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Office viewer loads remote template
Searches for Windows Mail specific files
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Remcos
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Detection:
cve-2017-11882-shellcode
Threat name:
Win32.Trojan.Generic
Status:
Malicious
First seen:
2023-12-18 18:53:05 UTC
File Type:
Document
Extracted files:
66
AV detection:
4 of 37 (10.81%)
Threat level:
2/5
Detection(s):
Suspicious file
Result
Malware family:
remcos
Score:
10/10
Tags:
family:remcos botnet:chi'm collection persistence rat spyware stealer upx
Behaviour
Uses Volume Shadow Copy service COM API
Uses Volume Shadow Copy WMI provider
Uses Task Scheduler COM API
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: MapViewOfSection
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: AddClipboardFormatListener
Modifies registry class
Modifies Internet Explorer settings
Launches Equation Editor
Enumerates system info in registry
Checks processor information in registry
NSIS installer
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Accesses Microsoft Outlook accounts
UPX packed file
Reads user/profile data of web browsers
Loads dropped DLL
Executes dropped EXE
Abuses OpenXML format to download file from external location
Downloads MZ/PE file
Blocklisted process makes network request
Nirsoft
NirSoft WebBrowserPassView
NirSoft MailPassView
Remcos
Malware Config
C2 Extraction:
unllin.com:3211
Malware family:
Remcos
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
Comments
Login required
You need to login to in order to write a comment. Login with your abuse.ch account.