MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4f18a18795f014313de0e26a1545c184da0223f0e40e481306b69e570471733. 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


Intelligence 13 IOCs YARA 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c4f18a18795f014313de0e26a1545c184da0223f0e40e481306b69e570471733
SHA3-384 hash: 8ca017f68ec6a07acc9cb9495cf8bd5229c4faff4f26ec7b64a33a2a823dfdab1f20aa2e78279766b1c04e88b7055cbf
SHA1 hash: 18047c188d1c9b036711d8daf8d19de3895d5f64
MD5 hash: 4bb6df24edd4eb1f37cfaa4160288b57
humanhash: seventeen-glucose-tennessee-shade
File name:5aa085f0fa8592460e391052db9c94cd.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:550'400 bytes
First seen:2021-02-04 09:39:43 UTC
Last seen:2021-02-04 11:43:57 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 12288:vRB+SZZi970NqvM8La6Z7LMLUVM/FOefPcDJKe6y+/:pnZ2La6Z0DfPcDJKe6
Threatray 1'519 similar samples on MalwareBazaar
TLSH 1BC4012C1EF84E15C2996FB95AB0E228E3BC81122D17D3198E613ED93E36FDC59809D5
Reporter abuse_ch
Tags:exe RAT RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
102
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
5aa085f0fa8592460e391052db9c94cd.exe
Verdict:
Malicious activity
Analysis date:
2021-02-04 09:43:56 UTC
Tags:
rat remcos keylogger
Link:
https://app.any.run/tasks/f6ac3e2b-c474-4125-9c2f-9c5b430199d7

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/115533/
Detection(s):
SecuriteInfo.com.Trojan.Packed2.42827.6260.26824.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a process with a hidden window
Deleting a recently created file
Running batch commands
Launching a process
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
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:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/599003
Signature
Allocates memory in foreign processes
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
Detected unpacking (creates a PE file in dynamic memory)
Injects a PE file into a foreign processes
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
Sigma detected: Remcos
Sigma detected: Suspicious Svchost Process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AntiVM_3
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 348536 Sample: 5aa085f0fa8592460e391052db9... Startdate: 04/02/2021 Architecture: WINDOWS Score: 100 53 sandshoe.myfirewall.org 2->53 65 Malicious sample detected (through community Yara rule) 2->65 67 Multi AV Scanner detection for submitted file 2->67 69 Detected Remcos RAT 2->69 71 6 other signatures 2->71 14 5aa085f0fa8592460e391052db9c94cd.exe 3 2->14         started        18 svchosts.exe 2 2->18         started        signatures3 process4 file5 51 5aa085f0fa8592460e391052db9c94cd.exe.log, ASCII 14->51 dropped 85 Contains functionality to steal Chrome passwords or cookies 14->85 87 Contains functionality to capture and log keystrokes 14->87 89 Contains functionality to inject code into remote processes 14->89 91 Contains functionality to steal Firefox passwords or cookies 14->91 20 5aa085f0fa8592460e391052db9c94cd.exe 4 5 14->20         started        23 svchosts.exe 18->23         started        signatures6 process7 file8 47 C:\Users\user\AppData\...\svchosts.exe, PE32 20->47 dropped 49 C:\Users\...\svchosts.exe:Zone.Identifier, ASCII 20->49 dropped 25 wscript.exe 1 20->25         started        process9 process10 27 cmd.exe 1 25->27         started        process11 29 svchosts.exe 3 27->29         started        32 conhost.exe 27->32         started        signatures12 79 Multi AV Scanner detection for dropped file 29->79 81 Detected unpacking (creates a PE file in dynamic memory) 29->81 83 Machine Learning detection for dropped file 29->83 34 svchosts.exe 4 3 29->34         started        38 svchosts.exe 29->38         started        process13 dnsIp14 55 sandshoe.myfirewall.org 79.134.225.96, 2404, 49744, 49747 FINK-TELECOM-SERVICESCH Switzerland 34->55 57 192.168.2.1 unknown unknown 34->57 73 Writes to foreign memory regions 34->73 75 Allocates memory in foreign processes 34->75 77 Injects a PE file into a foreign processes 34->77 40 svchost.exe 2 12 34->40         started        signatures15 process16 process17 42 iexplore.exe 40->42         started        process18 44 iexplore.exe 42->44         started        dnsIp19 59 avatars.githubusercontent.com 44->59 61 github.com 140.82.121.4, 443, 49759, 49760 GITHUBUS United States 44->61 63 2 other IPs or domains 44->63
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c4f18a18795f014313de0e26a1545c184da0223f0e40e481306b69e570471733/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-02-03 21:59:49 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ytyyugdzl4auge66bytkcvc4dbg2air7bzaojajqnnu6k4chc4zq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
21691425c52cf7a77c0e3a65cc1c0c59cb026d5b76e78160ebb8a553f9bbe50c
RemcosRAT
3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda
RemcosRAT
4791861118e0be776fd14153e2feca7d25f5a91a6c32a997385f5ae272e3d7c8
RemcosRAT
4b8335250b1cfcb5fac9790261dd43f5efcbc187c68961ee5afd34662d0599ed
RemcosRAT
5b10f4a23880b51923a0df3e9e3c37f40eb0d3cc93de7b463da62f936a501385
RemcosRAT
61d9f4cbc76b7889d7d17d262b63c0fd2ee40642653063b1eb6ab84397f8c57b
RemcosRAT
82027bdaf86e2d0da1c45ede5efd820a1cbaace1b1b8f7675b8115d82db75f26
RemcosRAT
d34e588c8bef9cef39708c52f7f372bcd4b5fc39e4eaf0b9193aa586a10d7cc2
RemcosRAT
dfd3c33bf7be405cea03a045f3df2d9ff35f04c7da918eb916b6f224a58eea1f
RemcosRAT
e26c95b32b64e3f7b5d72d52be2fd7cb52c7a2c1df25f5337a783a1735f806ad
RemcosRAT
+ 1'509 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence ransomware rat
Link:
https://tria.ge/reports/210204-2ap5f2jfms/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
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:
sandshoe.myfirewall.org:2404
Unpacked files
SH256 hash:
b212f0dfc69f00068a581f076e1f81315ed932cddaa6fd0c67c64cf722c46723
MD5 hash:
137275f8cfdad6f05e8f1a7b2edc5033
SHA1 hash:
6becfb294a315cec2976081ba3773996b8010871
Detections:
win_remcos_g0
Create hunting rule
win_remcos_auto
Create hunting rule
Link:
https://www.unpac.me/results/c773ea68-89b3-4557-8f07-7df0ffcb2207/
Parent samples :
2ac63fd303f0da81cfc80c17bf1cb6e9ef3d11abf648449271e980a91646ca25
abd5600b6b5f6228c095e5703429fbcecc647611fadd3e49090fbb70a8cfb728
c4f18a18795f014313de0e26a1545c184da0223f0e40e481306b69e570471733
48e8ff87262aacbe6b64962d5703ddf042e51bd5cd099bc787923ab33f172ccb
e16fca2ddc966a1a20b47df8c007cc64cda7f3a9f74f6f04a38d93f13324a379
ac03de9eb86c038c61523da3b2e8e8d6748f6f45762e44564547f96df37acbe4
SH256 hash:
a877efa738cbb2b4efdb377ef33ce3cc45f666c7ede7fdb1ee8ed892d8829ccb
MD5 hash:
af4d6869fcbde118f6f73a1f53504515
SHA1 hash:
d70bf0a78b65825d5765805914d37c42066186bc
Link:
https://www.unpac.me/results/c773ea68-89b3-4557-8f07-7df0ffcb2207/
SH256 hash:
a2a0bbbe8c9ee88441356010f63455c50dfcafe663db757bbc453c815c51d720
MD5 hash:
11e80c54bfeff7f0c120dae46df0a8be
SHA1 hash:
d597b9b0dcac06f0aa00a931bb90de8eba564651
Link:
https://www.unpac.me/results/c773ea68-89b3-4557-8f07-7df0ffcb2207/
SH256 hash:
c4f18a18795f014313de0e26a1545c184da0223f0e40e481306b69e570471733
MD5 hash:
4bb6df24edd4eb1f37cfaa4160288b57
SHA1 hash:
18047c188d1c9b036711d8daf8d19de3895d5f64
Link:
https://www.unpac.me/results/c773ea68-89b3-4557-8f07-7df0ffcb2207/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c4f18a18795f014313de0e26a1545c184da0223f0e40e481306b69e570471733

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
Create hunting rule
Author:abuse.ch
Rule name:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
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:Parallax
Create hunting rule
Author:@bartblaze
Description:Identifies Parallax RAT.
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:SUSP_Modified_SystemExeFileName_in_File
Create hunting rule
Author:Florian Roth
Description:Detecst a variant of a system file name often used by attackers to cloak their activity
Reference:https://www.symantec.com/blogs/threat-intelligence/seedworm-espionage-group
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

File information

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

Malspam

RemcosRAT

Executable exe c4f18a18795f014313de0e26a1545c184da0223f0e40e481306b69e570471733

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/115533/

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