MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a. 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 YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a
SHA3-384 hash: 173be9ecddc4836daf22a92b67d2eb8bd735d80a179c28e5613cedc0b4a058c729e887f97df1b5a8a2a5153b3daa3f74
SHA1 hash: a16867563a1b9f3f6b8a5d598a30e3c652cf3c98
MD5 hash: b5f571c5ecea37ddfd3cf332fac330c3
humanhash: one-mexico-uncle-diet
File name:PO 20191003.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'050'624 bytes
First seen:2021-02-16 15:50:23 UTC
Last seen:2021-02-17 21:51:48 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:TwCiqa1+rzmTIpfJLuxX1L7zt3bYYk/IC:s2zuIpfJLGX1Lvt3MYe
Threatray 1'148 similar samples on MalwareBazaar
TLSH 8925014036689E42C23F9E754513A0009BB16E3A9229E7CF6ECA3DFF15BEBC85541B47
Reporter abuse_ch
Tags:exe RAT RemcosRAT


Avatar
abuse_ch
Malspam distributing RemcosRAT:

HELO: vps.helitactica.xyz
Sending IP: 203.159.80.22
From: office@kolsitegroups.com
Subject: Purchase Order 3401
Attachment: PO 20191003.zip (contains "PO 20191003.exe")

Intelligence

File Origin
# of uploads :
3
# of downloads :
128
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Remcos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/117371/
Detection(s):
SecuriteInfo.com.Trojan.Packed2.42845.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
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
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/609171
Signature
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Delayed program exit found
Detected Remcos RAT
Detected unpacking (creates a PE file in dynamic memory)
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
Uses dynamic DNS services
Writes to foreign memory regions
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 353609 Sample: PO 20191003.exe Startdate: 16/02/2021 Architecture: WINDOWS Score: 100 63 fgtrert.duckdns.orgqweerreww.duckdns.org 2->63 65 fgtrert.duckdns.org 2->65 73 Found malware configuration 2->73 75 Malicious sample detected (through community Yara rule) 2->75 77 Detected Remcos RAT 2->77 79 11 other signatures 2->79 14 PO 20191003.exe 3 2->14         started        17 remcos.exe 2 2->17         started        20 remcos.exe 2 2->20         started        signatures3 process4 file5 57 C:\Users\user\AppData\...\PO 20191003.exe.log, ASCII 14->57 dropped 22 PO 20191003.exe 4 5 14->22         started        71 Injects a PE file into a foreign processes 17->71 25 remcos.exe 17->25         started        27 remcos.exe 17->27         started        29 remcos.exe 20->29         started        signatures6 process7 file8 53 C:\Users\user\AppData\Roaming\...\remcos.exe, PE32 22->53 dropped 55 C:\Users\user\...\remcos.exe:Zone.Identifier, ASCII 22->55 dropped 31 wscript.exe 1 22->31         started        process9 process10 33 cmd.exe 1 31->33         started        process11 35 remcos.exe 3 33->35         started        38 conhost.exe 33->38         started        signatures12 81 Detected unpacking (creates a PE file in dynamic memory) 35->81 83 Machine Learning detection for dropped file 35->83 85 Injects a PE file into a foreign processes 35->85 40 remcos.exe 4 3 35->40         started        process13 dnsIp14 67 fgtrert.duckdns.org 124.122.132.220, 8494 TRUE-AS-APTrueInternetCoLtdTH Thailand 40->67 69 fgtrert.duckdns.orgqweerreww.duckdns.org 40->69 87 Writes to foreign memory regions 40->87 89 Allocates memory in foreign processes 40->89 91 Injects a PE file into a foreign processes 40->91 44 svchost.exe 40->44         started        signatures15 process16 process17 46 iexplore.exe 44->46         started        process18 48 iexplore.exe 46->48         started        51 iexplore.exe 46->51         started        dnsIp19 59 github.com 140.82.121.3, 443, 49718, 49719 GITHUBUS United States 48->59 61 avatars.githubusercontent.com 185.199.108.133, 443, 49722, 49723 FASTLYUS Netherlands 48->61
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a/
Threat name:
ByteCode-MSIL.Packed.Generic
Create hunting rule
Status:
Suspicious
First seen:
2021-02-16 15:51:10 UTC
AV detection:
13 of 28 (46.43%)
Threat level:
  1/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ymowju2iqybadgrhzwzvly5hlk7udrcx23jkujxw3cgcutj7ymfa._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
08c85e93e63fba43e25a3e7bf4e3d9b47783a8acf74a75be9eceffdc68d46cf4
RemcosRAT
0aae2bace47fd4233b42b2ee714d5f46a05fc2970928131c28573d9fbd876552
RemcosRAT
2a914a931b749d964e9087d25ec502a25c22118c24e0239e7b9a73af3d4a6779
RemcosRAT
68c7c81b15818419222a9c58550c72c78d30856ccde7a6fe4fc1a096fcd6f064
RemcosRAT
6cf485e9d0c0f8ffbe0c4d8776adfd121f4de33fd73262d642739cc3491cac13
RemcosRAT
719bb30fb8ff3d79fd0216bdbc9f9d1b377c1456a20c8d9a26f1a19e283352ba
RemcosRAT
80893e190d49fdc68aec0754db2ffe46c60dccecff6d6d42591858ddba315fa6
RemcosRAT
848aee75718b5e635f13a64dcb64dd0c0d4d44228952d2941a9c4c1c14fd7ea1
RemcosRAT
8d087e56deb745a40c704cd0a508f9f07b697b3ff44ae660ee581f7f42e4e160
RemcosRAT
b4ac6ef619dad164d5807395559ed299ce39cd5ec375aa86229d6617973a81fe
RemcosRAT
+ 1'138 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat
Link:
https://tria.ge/reports/210216-14vyfwl176/
Behaviour
Modifies registry class
Suspicious behavior: GetForegroundWindowSpam
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:
2ec41720b412f91f91daaefea38007449491b2c016238aa8f23b6866c89bc788
MD5 hash:
987ce346069cf47535e5ac57265c7228
SHA1 hash:
d0085325ed78fcac6d1f605753237abd1c40db22
Link:
https://www.unpac.me/results/8b0474e4-f713-48d7-9051-20d33acb5dbb/
SH256 hash:
f96bdc98e77b514b6660c7068ee4ca5ec18b89f31d0703b131ab533d8e560f2e
MD5 hash:
6efe7a75f243f0c0b2f2291e83770670
SHA1 hash:
7cd29b2523ffbc9fadf4ae9637e0c0b32d7cc132
Link:
https://www.unpac.me/results/8b0474e4-f713-48d7-9051-20d33acb5dbb/
SH256 hash:
ce6c454e873fbfbcb1687855c40baafbc93be0a5c1b94ba2c112ad6696139fd8
MD5 hash:
51ec5074914e246b625e4804ddad7c53
SHA1 hash:
203ac95b3fac1586f6bd0476ed7f8558ca27a293
Detections:
win_remcos_g0
Create hunting rule
Link:
https://www.unpac.me/results/8b0474e4-f713-48d7-9051-20d33acb5dbb/
Parent samples :
b4ac6ef619dad164d5807395559ed299ce39cd5ec375aa86229d6617973a81fe
848aee75718b5e635f13a64dcb64dd0c0d4d44228952d2941a9c4c1c14fd7ea1
8c0e5872f00565c21bdf5f5f930ebbfdb116913962150eb35fd3a603e058a045
c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a
SH256 hash:
c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a
MD5 hash:
b5f571c5ecea37ddfd3cf332fac330c3
SHA1 hash:
a16867563a1b9f3f6b8a5d598a30e3c652cf3c98
Link:
https://www.unpac.me/results/8b0474e4-f713-48d7-9051-20d33acb5dbb/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a

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

zip 9c1662657a6f4bb2a539332df862f46ec64888c0cc2da0e2e744c1a30bcef017

RemcosRAT

Executable exe c31d64d3488602019a27cdb355e3a75abf41c457d6d2aa26f6d88c2a4d3fc30a

(this sample)

  
Dropped by
MD5 0d203755ea1368b227b7d1af9ed8738e
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/117371/
  
Dropped by
SHA256 9c1662657a6f4bb2a539332df862f46ec64888c0cc2da0e2e744c1a30bcef017

Comments