MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4. 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: 11


Intelligence 11 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4
SHA3-384 hash: 2aaeca3cf31b2afb93ee6fe7952354bfd632d6b3bf4b4e198167ef0bb6eccf3795234d439c81d198739f80c18755fa5c
SHA1 hash: aee977957dba42efb4808719ab3001101d95b1fb
MD5 hash: b8bc7a97eaa75f13cdfb5406d0e6e004
humanhash: football-purple-montana-delaware
File name:Appointment Letter.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:552'960 bytes
First seen:2021-08-11 12:00:24 UTC
Last seen:2021-08-11 12:54:32 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'754 x AgentTesla, 19'662 x Formbook, 12'252 x SnakeKeylogger)
ssdeep 12288:1EMn/s4p3C1fC6w8fBxtNUcp4sKqSj1iccor5S0/USkIV+a:1z/sW3C1fCD4DfUF
Threatray 1'937 similar samples on MalwareBazaar
TLSH T1ABC43AAC325075EFC857C976CAA81C64EA21787B430BD203A01725ADDE2DA9BDF151F3
dhash icon 74f0dcccccd4c0d4 (10 x AgentTesla, 6 x RemcosRAT, 5 x BitRAT)
Reporter GovCERT_CH
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
119
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Appointment Letter.exe
Verdict:
Malicious activity
Analysis date:
2021-08-11 12:01:33 UTC
Tags:
rat remcos
Link:
https://app.any.run/tasks/94d1c3af-24df-4aba-a855-5f8642a29ce3

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/178224/
Detection(s):
SecuriteInfo.com.Scr.Malcodegdn30.24391.21889.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Running batch commands
Enabling autorun by creating a file
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ee2a52b7-4c6f-4a4d-93ac-4fc15f5b5e25
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/831004
Signature
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 steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Detected Remcos RAT
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 463444 Sample: Appointment Letter.exe Startdate: 11/08/2021 Architecture: WINDOWS Score: 100 68 Malicious sample detected (through community Yara rule) 2->68 70 Multi AV Scanner detection for dropped file 2->70 72 Multi AV Scanner detection for submitted file 2->72 74 12 other signatures 2->74 10 Appointment Letter.exe 6 2->10         started        14 mstsc.exe 4 2->14         started        16 mstsc.exe 4 2->16         started        process3 file4 58 C:\Users\user\AppData\Roaming\AVehowTuz.exe, PE32 10->58 dropped 60 C:\Users\user\AppData\Local\...\tmp976A.tmp, XML 10->60 dropped 62 C:\Users\user\...\Appointment Letter.exe.log, ASCII 10->62 dropped 82 Injects a PE file into a foreign processes 10->82 18 Appointment Letter.exe 1 5 10->18         started        21 schtasks.exe 1 10->21         started        23 Appointment Letter.exe 10->23         started        25 schtasks.exe 14->25         started        27 mstsc.exe 14->27         started        29 schtasks.exe 16->29         started        signatures5 process6 file7 54 C:\Users\user\AppData\Roaming\...\mstsc.exe, PE32 18->54 dropped 56 C:\Users\user\...\mstsc.exe:Zone.Identifier, ASCII 18->56 dropped 31 cmd.exe 1 18->31         started        34 conhost.exe 21->34         started        36 conhost.exe 25->36         started        process8 signatures9 84 Uses ping.exe to sleep 31->84 86 Uses ping.exe to check the status of other devices and networks 31->86 38 mstsc.exe 5 31->38         started        41 PING.EXE 1 31->41         started        44 conhost.exe 31->44         started        process10 dnsIp11 76 Multi AV Scanner detection for dropped file 38->76 78 Machine Learning detection for dropped file 38->78 80 Injects a PE file into a foreign processes 38->80 46 mstsc.exe 38->46         started        50 schtasks.exe 38->50         started        64 127.0.0.1 unknown unknown 41->64 signatures12 process13 dnsIp14 66 194.5.98.81, 49738, 49739, 49740 DANILENKODE Netherlands 46->66 88 Installs a global keyboard hook 46->88 52 conhost.exe 50->52         started        signatures15 process16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-08-11 05:00:27 UTC
AV detection:
20 of 46 (43.48%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=mhyinu4pep7n2pwqcka4nxcdsaoq3wsuyohccyfoyzuebgj6clca._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
4c11b7fb217b3675e60d659ce0a2c3eee1bdbd3e3ddba1ad6d762878f62534d1
RemcosRAT
5b474ca6fc8158bd6f14d53bca8962f25db3392dfe324f49ddf376610bd785e4
RemcosRAT
5f4e4a43a01b235d781c6888198b18750529dda9fc4727727940115090e06a6d
RemcosRAT
885e34ff7befbdcdb027a017843cbacdba7eebb34d3df2e3113cceb9adafe8b5
RemcosRAT
ac7d008a3ac44bc8dfe3edbbc8542ed5b51bcf911b67eb8e9a715ebb5250ad27
RemcosRAT
ce4962d3126223b4bd68704159cbdc7479fb2df4263fb9f3d57492e770b74a94
RemcosRAT
d2a1375e9e0c3c8fbc3496cb6c1690e2c47d167a5cac476b528ad2c051f85a52
RemcosRAT
ed3a96630761ee25131c40b747f50fc55aa85d5e8f631f71bbfc901dd96bac13
RemcosRAT
eeddb4eb1252a45f5a8246d68dc6557f3e0c6f264a0a6f42e81d041c53864a48
RemcosRAT
ff91b720363ded7601beba0c3b9f73c4cd677c79e88f9b82113073d0691df7a9
RemcosRAT
+ 1'927 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:host persistence rat
Link:
https://tria.ge/reports/210811-9v4ypvc7hn/
Behaviour
Creates scheduled task(s)
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Executes dropped EXE
Remcos
Malware Config
C2 Extraction:
194.5.98.81:7123
Unpacked files
SH256 hash:
1d99246378ccf15778bd36cc3d85b09a6e53581c4cff5f441cc520dfb99896df
MD5 hash:
c8b3a05b20c5bdc2909cd4ec7e8509f3
SHA1 hash:
4797b824d0729d77b7d949e69819c36fa0bc0c15
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/3946c35e-b40d-4128-b673-390c92b3e11d/
Parent samples :
74615bedcd52ff089b0ed9dede11c46cd27de39b0b52c309ad71175e79e53868
cfb4e7b08343010cf746149e718c8737e4293390d02bc5bf30d46c5e73871651
61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4
SH256 hash:
a32a5d236c5ead9682d245b72134d2083c3c352aafbc572dbf83c4ee467f8f3c
MD5 hash:
0dd25479ac35ac06aec372691fda35be
SHA1 hash:
139f76afcd7d3bad40ef5fe3329e552b39c36043
Link:
https://www.unpac.me/results/3946c35e-b40d-4128-b673-390c92b3e11d/
SH256 hash:
962ac80ee2ce956e16904c611e706deacabfbe4e4f4495bbafefd6095269db0f
MD5 hash:
8259c9979d28dd89385e91b394afc8b2
SHA1 hash:
01a1317cd4122e57eaad54bcf53a4a2f4fabcd5a
Link:
https://www.unpac.me/results/3946c35e-b40d-4128-b673-390c92b3e11d/
SH256 hash:
61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4
MD5 hash:
b8bc7a97eaa75f13cdfb5406d0e6e004
SHA1 hash:
aee977957dba42efb4808719ab3001101d95b1fb
Link:
https://www.unpac.me/results/3946c35e-b40d-4128-b673-390c92b3e11d/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/61f086d38f23/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

RemcosRAT

Executable exe 61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4

(this sample)

  
Dropped by
RemcosRAT
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/178224/

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