MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6ce798e776cf4fdcf419958817fc139391ae804e1f47b12998312fd8cea6621f. 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: 10


Intelligence 10 IOCs 1 YARA 9 File information Comments 1

SHA256 hash: 6ce798e776cf4fdcf419958817fc139391ae804e1f47b12998312fd8cea6621f
SHA3-384 hash: 741cfcf8931c9bf0d59732c77c2aa952cf77d600d5b50124a69469c1e586949dd3adf31081fbae11a8401845e2ddfe64
SHA1 hash: 3f8eeb7861f1ef29afdceb66df946c88eac59bb5
MD5 hash: daed4663a9ec90f38e12b3f6725f45be
humanhash: thirteen-nine-delaware-football
File name:PO ????-34002174,pdf.exe
Download: download sample
Signature RemcosRAT
File size:198'746 bytes
First seen:2021-05-20 12:10:45 UTC
Last seen:2021-05-20 13:20:22 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 099c0646ea7282d232219f8807883be0 (476 x Formbook, 210 x Loki, 107 x AgentTesla)
ssdeep 3072:MQIURTXJV0kuMzk5qf/8cjjw3Q61AwhF9rUMZ6BSWNOi9G59jTe0cE5Cs08M5twt:MsxjzkO0cUQ6eTNOi65ojwh04D
Threatray 1'787 similar samples on MalwareBazaar
TLSH 561402A536F448A7D01A567299B393B9A7B1AE0C1611028FB7FA3F5324720F3CA1375D
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
RemcosRAT C2:
23.105.131.141:1550

Indicators Of Compromise (IOCs)


Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
23.105.131.141:1550 https://threatfox.abuse.ch/ioc/49792/

Intelligence


File Origin
# of uploads :
2
# of downloads :
126
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
8cd4c4b9-e143-431a-9965-c56be7be78a1
Verdict:
Malicious activity
Analysis date:
2021-05-20 12:17:32 UTC
Tags:
installer rat remcos

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to capture and log keystrokes
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Detected Remcos RAT
Found malware configuration
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Dridex Process Pattern
Sigma detected: Suspicious Svchost Process
System process connects to network (likely due to code injection or exploit)
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 418555 Sample: PO ____-34002174,pdf.exe Startdate: 20/05/2021 Architecture: WINDOWS Score: 100 38 zion6.ddns.net 2->38 42 Found malware configuration 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 Icon mismatch, binary includes an icon from a different legit application in order to fool users 2->46 48 7 other signatures 2->48 8 PO ____-34002174,pdf.exe 1 23 2->8         started        11 thjtsvwhfbmd.exe 18 2->11         started        signatures3 process4 file5 30 C:\Users\user\AppData\...\thjtsvwhfbmd.exe, PE32 8->30 dropped 32 C:\Users\user\AppData\Local\...\System.dll, PE32 8->32 dropped 14 svchost.exe 8->14         started        17 PO ____-34002174,pdf.exe 19 8->17         started        34 C:\Users\user\AppData\Local\...\ounxtzhownse, DOS 11->34 dropped 36 C:\Users\user\AppData\Local\...\System.dll, PE32 11->36 dropped 52 Multi AV Scanner detection for dropped file 11->52 20 thjtsvwhfbmd.exe 9 11->20         started        22 svchost.exe 11->22         started        signatures6 process7 file8 54 System process connects to network (likely due to code injection or exploit) 14->54 56 Contains functionality to steal Chrome passwords or cookies 14->56 58 Contains functionality to capture and log keystrokes 14->58 64 2 other signatures 14->64 28 C:\Users\user\AppData\Local\...\System.dll, PE32 17->28 dropped 60 Writes to foreign memory regions 17->60 62 Maps a DLL or memory area into another process 17->62 24 svchost.exe 2 17->24         started        signatures9 process10 dnsIp11 40 zion6.ddns.net 23.105.131.141, 1550, 49742, 49746 LEASEWEB-USA-NYC-11US United States 24->40 50 System process connects to network (likely due to code injection or exploit) 24->50 signatures12
Threat name:
Win32.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-05-20 11:41:36 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
22 of 47 (46.81%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:remcos persistence rat
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Remcos
Malware Config
C2 Extraction:
zion6.ddns.net:1550
Please note that we are no longer able to provide a coverage score for Virus Total.

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:ach_RemcosRAT
Author:abuse.ch
Rule name:Chrome_stealer_bin_mem
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Keylog_bin_mem
Author:James_inthe_box
Description:Contains Keylog
Rule name:Parallax
Author:@bartblaze
Description:Identifies Parallax RAT.
Rule name:Remcos
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:remcos_rat
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Rule name:win_remcos_auto
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information


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

Comments



Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-05-20 13:29:51 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [C0032.001] Data Micro-objective::CRC32::Checksum
1) [C0026.002] Data Micro-objective::XOR::Encode Data
3) [C0045] File System Micro-objective::Copy File
4) [C0046] File System Micro-objective::Create Directory
5) [C0048] File System Micro-objective::Delete Directory
6) [C0047] File System Micro-objective::Delete File
7) [C0049] File System Micro-objective::Get File Attributes
8) [C0051] File System Micro-objective::Read File
9) [C0050] File System Micro-objective::Set File Attributes
10) [C0052] File System Micro-objective::Writes File
11) [E1510] Impact::Clipboard Modification
12) [C0036.004] Operating System Micro-objective::Create Registry Key::Registry
13) [C0036.002] Operating System Micro-objective::Delete Registry Key::Registry
14) [C0036.007] Operating System Micro-objective::Delete Registry Value::Registry
15) [C0036.003] Operating System Micro-objective::Open Registry Key::Registry
16) [C0036.005] Operating System Micro-objective::Query Registry Key::Registry
17) [C0036.006] Operating System Micro-objective::Query Registry Value::Registry
18) [C0036.001] Operating System Micro-objective::Set Registry Key::Registry
19) [C0017] Process Micro-objective::Create Process
20) [C0038] Process Micro-objective::Create Thread
21) [C0018] Process Micro-objective::Terminate Process