MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 42ef2a340b9b5ec88d5ab83584f07ecc76e7b3842640aecd328ad9d85ad745e8. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 42ef2a340b9b5ec88d5ab83584f07ecc76e7b3842640aecd328ad9d85ad745e8
SHA3-384 hash: dd3736bbaf1cf59abe104eb5ece200ac37d8d4d94529eb7e65f41667039c1ee9e9c45de4f70edaffaef4db7adece1817
SHA1 hash: 82a54961994ff2b1ef7bec9fd467a327df2b582c
MD5 hash: 1bf2f660917d980012006b0f8c152c31
humanhash: quebec-nineteen-oklahoma-network
File name:73a4f40d0affe5eea89174f8917bba73.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:932'352 bytes
First seen:2021-02-17 06:32:01 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 24576:joJZiJX4zzYYj4vj+2wcIzOaJrXbKymhetfnZDvno:AEeYA4vj5yX9uyWIw
Threatray 67 similar samples on MalwareBazaar
TLSH EB15E09C71707AEFC56BC2BADA686CA4EB3175BB930B8207921740B9591C9D7CF140B3
Reporter abuse_ch
Tags:exe RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: slot0.groveressentials.xyz
Sending IP: 203.159.80.67
From: Sales06 - PRO <order@groveressentials.xyz>
Subject: rfq/2021/FEB-017/QUOTATION 20210217 NEW ORDER (NEUE BESTELLUNG)
Attachment: 73a4f40d0affe5eea89174f8917bba73.gz (contains "73a4f40d0affe5eea89174f8917bba73.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
105
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/117474/
Detection(s):
SecuriteInfo.com.Trojan.Packed2.42845.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
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/609813
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
Delayed program exit found
Detected Remcos RAT
Drops PE files with benign system names
Found malware configuration
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)
Sigma detected: Remcos
Sigma detected: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
Uses dynamic DNS services
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 353929 Sample: 73a4f40d0affe5eea89174f8917... Startdate: 17/02/2021 Architecture: WINDOWS Score: 100 61 sandshoe.myfirewall.org 2->61 63 anti-vi.duckdns.org 2->63 73 Found malware configuration 2->73 75 Malicious sample detected (through community Yara rule) 2->75 77 Detected Remcos RAT 2->77 79 7 other signatures 2->79 12 73a4f40d0affe5eea89174f8917bba73.exe 3 2->12         started        16 svchost.exe 2 2->16         started        18 svchost.exe 2 2->18         started        20 4 other processes 2->20 signatures3 process4 file5 59 73a4f40d0affe5eea89174f8917bba73.exe.log, ASCII 12->59 dropped 85 Contains functionality to steal Chrome passwords or cookies 12->85 87 Contains functionality to capture and log keystrokes 12->87 89 Contains functionality to inject code into remote processes 12->89 93 3 other signatures 12->93 22 73a4f40d0affe5eea89174f8917bba73.exe 4 5 12->22         started        91 Injects a PE file into a foreign processes 16->91 25 svchost.exe 16->25         started        27 svchost.exe 16->27         started        29 svchost.exe 16->29         started        35 2 other processes 16->35 31 svchost.exe 18->31         started        33 svchost.exe 18->33         started        signatures6 process7 file8 55 C:\Users\user\AppData\Roaming\...\svchost.exe, PE32 22->55 dropped 57 C:\Users\user\...\svchost.exe:Zone.Identifier, ASCII 22->57 dropped 37 wscript.exe 1 22->37         started        process9 dnsIp10 65 192.168.2.1 unknown unknown 37->65 40 cmd.exe 1 37->40         started        process11 process12 42 svchost.exe 3 40->42         started        45 conhost.exe 40->45         started        signatures13 81 Machine Learning detection for dropped file 42->81 83 Injects a PE file into a foreign processes 42->83 47 svchost.exe 42->47         started        51 svchost.exe 42->51         started        process14 dnsIp15 67 anti-vi.duckdns.org 79.134.225.105, 2403, 2404, 49748 FINK-TELECOM-SERVICESCH Switzerland 47->67 69 sandshoe.myfirewall.org 47->69 71 System process connects to network (likely due to code injection or exploit) 47->71 53 svchost.exe 47->53         started        signatures16 process17
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/42ef2a340b9b5ec88d5ab83584f07ecc76e7b3842640aecd328ad9d85ad745e8/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-02-17 06:32:13 UTC
AV detection:
16 of 46 (34.78%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ilxsunaltnpmrdk2xa2yj4d6zr3opm4eezak5tjsrlm5qwwxixua._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
08c85e93e63fba43e25a3e7bf4e3d9b47783a8acf74a75be9eceffdc68d46cf4
RemcosRAT
46131c5f93779a7547011c983be113cbf561fee1f4cba59ce8dd8f0bfb4a48f7
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68c7c81b15818419222a9c58550c72c78d30856ccde7a6fe4fc1a096fcd6f064
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80893e190d49fdc68aec0754db2ffe46c60dccecff6d6d42591858ddba315fa6
RemcosRAT
848aee75718b5e635f13a64dcb64dd0c0d4d44228952d2941a9c4c1c14fd7ea1
RemcosRAT
8c0e5872f00565c21bdf5f5f930ebbfdb116913962150eb35fd3a603e058a045
RemcosRAT
8d087e56deb745a40c704cd0a508f9f07b697b3ff44ae660ee581f7f42e4e160
RemcosRAT
b4ac6ef619dad164d5807395559ed299ce39cd5ec375aa86229d6617973a81fe
RemcosRAT
c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a
RemcosRAT
c3d5cfa19bb7af77abe161135bd85506171d67dca3f86fa6a68340d05e203f64
RemcosRAT
+ 57 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/210217-h965pnx4le/
Behaviour
Modifies registry class
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
Unpacked files
SH256 hash:
f2028b875cdee2abe8f04549fc7bcadf3938338b997a781e7bbd62970aaa4cf7
MD5 hash:
a610e6e482a8c14e111d827d2c104fd5
SHA1 hash:
7ff65452262366d9f6f33b2e6b6ce0aefa148e21
Detections:
win_remcos_g0
Create hunting rule
Link:
https://www.unpac.me/results/23dfa8a3-baf2-429a-b572-3344f51b39cc/
SH256 hash:
bb4b1bb69609104d64fbf035f2340cb1aab3ecd4ee090bee924e2621cf536257
MD5 hash:
73144f7c2754b12f5c26570530afda7a
SHA1 hash:
2ff6c142d2f71367c3f8aab60ef090333425eff4
Link:
https://www.unpac.me/results/23dfa8a3-baf2-429a-b572-3344f51b39cc/
SH256 hash:
2ec41720b412f91f91daaefea38007449491b2c016238aa8f23b6866c89bc788
MD5 hash:
987ce346069cf47535e5ac57265c7228
SHA1 hash:
d0085325ed78fcac6d1f605753237abd1c40db22
Link:
https://www.unpac.me/results/23dfa8a3-baf2-429a-b572-3344f51b39cc/
SH256 hash:
42ef2a340b9b5ec88d5ab83584f07ecc76e7b3842640aecd328ad9d85ad745e8
MD5 hash:
1bf2f660917d980012006b0f8c152c31
SHA1 hash:
82a54961994ff2b1ef7bec9fd467a327df2b582c
Link:
https://www.unpac.me/results/23dfa8a3-baf2-429a-b572-3344f51b39cc/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.38
Link:
https://yomi.yoroi.company/submissions/42ef2a340b9b5ec88d5ab83584f07ecc76e7b3842640aecd328ad9d85ad745e8

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_rat
Create hunting rule
Author:jeFF0Falltrades
Rule name:REMCOS_RAT_variants
Create hunting rule

File information

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

Malspam

RemcosRAT

tar 9e31830230743fbd8374a2894cbbd4f10d2d91a4d08dde374d79aad92ceb247b

RemcosRAT

Executable exe 42ef2a340b9b5ec88d5ab83584f07ecc76e7b3842640aecd328ad9d85ad745e8

(this sample)

  
Dropped by
MD5 b08e045217a374f32b7b6de7866d1171
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/117474/
  
Dropped by
SHA256 9e31830230743fbd8374a2894cbbd4f10d2d91a4d08dde374d79aad92ceb247b

Comments