MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a81dc80c4e292405023f9c59504e55045ca754901cd06185d041642ce91a33b2. 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: 9


Intelligence 9 IOCs YARA 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a81dc80c4e292405023f9c59504e55045ca754901cd06185d041642ce91a33b2
SHA3-384 hash: 2edaff595351b9346c0c2473be12f8f6caf88d2dfc61d9795eefb78cc501c91b18d82963fc9bcc2b05670b4cd4fbc395
SHA1 hash: e8910f1987f3c2b39b37885790aea305c8e09fec
MD5 hash: 0b3fd095b95a6e7ff50a33e9bd83af8d
humanhash: earth-quiet-blossom-papa
File name:HESAP BILGISI.PDF.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:370'176 bytes
First seen:2021-01-15 15:50:31 UTC
Last seen:2021-01-15 17:50:56 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 375074facb4538d8601767b5ab845277 (2 x AgentTesla, 2 x RemcosRAT, 2 x Formbook)
ssdeep 1536:Yf0VehvW0bcjcRsorTPuzg2/lwLA8dLYfkJH6zC/PisGFTpszN+VPJby:sqpolCzg2/lw7FYMvqFdDly
Threatray 1'615 similar samples on MalwareBazaar
TLSH E974F2D1F15088DAED6B49F1BD2BA5302497BE9C94A4410C569EBB1B76F3342309FE0E
Reporter abuse_ch
Tags:exe geo RemcosRAT TUR


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: hosted-by.rootlayer.net
Sending IP: 185.222.58.152
From: ekstre@eekstre.qnbfinansbank.com
Subject: CardFinans KOBİ Visa Ocak ayı ekstreniz.
Attachment: HESAP BILGISI.PDF.z (contains "HESAP BILGISI.PDF.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
191
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
HESAP BILGISI.PDF.exe
Verdict:
Malicious activity
Analysis date:
2021-01-15 16:17:44 UTC
Tags:
trojan rat remcos
Link:
https://app.any.run/tasks/06b3b661-1f16-49a0-8563-188c75ef23d6

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/112241/
Detection(s):
SecuriteInfo.com.Artemis.2194.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Running batch commands
Creating a file in the %temp% subdirectories
Creating a file
Creating a process with a hidden window
Unauthorized injection to a recently created process
Setting a keyboard event handler
Sending a custom TCP request
Creating a window
Launching a process
Creating a file in the %AppData% subdirectories
Sending a UDP request
Enabling autorun by creating a file
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/582613
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to capture and log keystrokes
Contains functionality to detect virtual machines (IN, VMware)
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
Detected Remcos RAT
Initial sample is a PE file and has a suspicious name
Installs a global keyboard hook
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: Remcos
Sigma detected: Suspicious Double Extension
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 340345 Sample: HESAP BILGISI.PDF.exe Startdate: 15/01/2021 Architecture: WINDOWS Score: 100 30 Malicious sample detected (through community Yara rule) 2->30 32 Antivirus detection for dropped file 2->32 34 Antivirus / Scanner detection for submitted sample 2->34 36 15 other signatures 2->36 7 HESAP BILGISI.PDF.exe 3 2->7         started        process3 file4 24 C:\Users\user\AppData\Local\Temp\...\file.exe, PE32 7->24 dropped 38 Maps a DLL or memory area into another process 7->38 11 HESAP BILGISI.PDF.exe 1 3 7->11         started        16 conhost.exe 7->16         started        18 cmd.exe 1 7->18         started        20 cmd.exe 1 7->20         started        signatures5 process6 dnsIp7 28 72.11.157.241, 4445, 49720 ASN-QUADRANET-GLOBALUS United States 11->28 26 C:\Users\user\AppData\Roaming\...\logs.dat, ASCII 11->26 dropped 40 Installs a global keyboard hook 11->40 22 conhost.exe 11->22         started        file8 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a81dc80c4e292405023f9c59504e55045ca754901cd06185d041642ce91a33b2/
Threat name:
Win32.Trojan.Pwsx
Create hunting rule
Status:
Malicious
First seen:
2021-01-15 11:38:11 UTC
AV detection:
13 of 46 (28.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vao4qdcofesakar7trmvatsvarokoveqdtigdboqifscz2i2goza._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
04e18fc32464a616b096a50a3ed43b646ece444e693b238a29d6f6de6ee45833
RemcosRAT
1619a67b0219aac78f1e5e8ac86ec2cf68641ba65a19653fc176916275b6f6ad
RemcosRAT
210560d23e3c023c90bd24ed0d76c68732dc267277fc6adcc3c991cb611bb06a
RemcosRAT
292fdda313c6d03852ecd9487653eb15bdf8cf6412e814365c2f176a1104cbc3
RemcosRAT
4903333c4aca1501316d62fadbee470fba700b11a23fbcdbc1435ff1b73f7aaf
RemcosRAT
5df5e69f38e5fc641a089f213a2791aa1a9d9df801093a6dbd3bfb680c38884c
RemcosRAT
7a5dd5409a4a4928ac82b3c019c717d4d6a920a4309e0dcd9fec58f3711187f0
RemcosRAT
abd4e6ee8152822c0545bd27a4f4c5114728873873e227044dfb48ecf1ecb37f
RemcosRAT
b55bd6825fe91af7f39a6db95cc72d531fae8edf94266dfcbf82d44fcf1e67c7
RemcosRAT
c85e13a5030bcd0c8173ef7ff6939690fe9638fa25d3c89cbf1e1e95a89db997
RemcosRAT
+ 1'605 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos rat
Link:
https://tria.ge/reports/210115-e232les5la/
Behaviour
Creates scheduled task(s)
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetThreadContext
Remcos
Malware Config
C2 Extraction:
72.11.157.241:4445
Unpacked files
SH256 hash:
a81dc80c4e292405023f9c59504e55045ca754901cd06185d041642ce91a33b2
MD5 hash:
0b3fd095b95a6e7ff50a33e9bd83af8d
SHA1 hash:
e8910f1987f3c2b39b37885790aea305c8e09fec
Link:
https://www.unpac.me/results/cfa70415-a320-4916-a01d-11c6a9dbd6f2/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/a81dc80c4e292405023f9c59504e55045ca754901cd06185d041642ce91a33b2

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:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:INDICATOR_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
Rule name:Remcos
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Remcos in memory
Rule name:remcos_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:suspicious_packer_section
Create hunting rule
Author:@j0sm1
Description:The packer/protector section names/keywords
Reference:http://www.hexacorn.com/blog/2012/10/14/random-stats-from-1-2m-samples-pe-section-names/
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator
Rule name:win_remcos_g0
Create hunting rule
Author:Daniel Plohmann <daniel.plohmann<at>fkie.fraunhofer.de>

File information

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

Malspam

RemcosRAT

zip dc9dc464155e04131a1411b6061acdee46325087dd0f5267d4f3c9a55f0b7925

RemcosRAT

Executable exe a81dc80c4e292405023f9c59504e55045ca754901cd06185d041642ce91a33b2

(this sample)

  
Dropped by
MD5 ca2748f26c3c1b21e761ba8354048298
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/112241/
  
Dropped by
SHA256 dc9dc464155e04131a1411b6061acdee46325087dd0f5267d4f3c9a55f0b7925

Comments