MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0639a34ed8b8a0702daec2d05da6afdd33c6c41dc2bb9cb2537c247825843adf. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0639a34ed8b8a0702daec2d05da6afdd33c6c41dc2bb9cb2537c247825843adf
SHA3-384 hash: 822fd5903317a19a7ec738a597d8f4aecf42ff86cba3ed5dd7f4c2bb4a03d75392a2a868e86b144f847c88e99e7faaa2
SHA1 hash: 2e74ebf894739e35b0ffd299b22591e47feb9f54
MD5 hash: 916e5acc3ae9ef32c065913b73dceb4f
humanhash: illinois-blue-lithium-earth
File name:pre alert documents.bat
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:731'136 bytes
First seen:2022-06-01 20:24:25 UTC
Last seen:2022-06-03 05:31:50 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 12288:Gp++/CzpLDQ93TQNRT6ccGBCS4dbe0x746k04icLd:Kqz5oDQN9JD4daU4lLicL
Threatray 2'074 similar samples on MalwareBazaar
TLSH T14BF4F106A68C4757D32A5BFA4851E8BDE3B92D0B7842FBDE5AD76EC738217001C1612F
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter GovCERT_CH
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
4
# of downloads :
381
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
pre alert documents.bat
Verdict:
Suspicious activity
Analysis date:
2022-06-01 20:29:24 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/88562cd0-b24a-4d8e-a7a2-adf096a56700

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/276177/
Detection(s):
SecuriteInfo.com.Heur.Conjar.1.6135.11217.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Adding an access-denied ACE
Creating a file in the %temp% subdirectories
Сreating synchronization primitives
Launching a process
Creating a process from a recently created file
Creating a process with a hidden window
Creating a file
Sending a custom TCP request
Launching a service
DNS request
Sending an HTTP GET request
Modifying a system file
Creating a file in the Windows subdirectories
Searching for synchronization primitives
Deleting a recently created file
Unauthorized injection to a recently created process
Unauthorized injection to a system process
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/1ea0cb19-1c48-4146-8847-706b54550e2d
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1005334
Signature
.NET source code contains very large array initializations
Allocates memory in foreign processes
Contains functionality to hide user accounts
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
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 637830 Sample: pre alert documents.bat Startdate: 01/06/2022 Architecture: WINDOWS Score: 100 78 Malicious sample detected (through community Yara rule) 2->78 80 Multi AV Scanner detection for submitted file 2->80 82 Yara detected UAC Bypass using CMSTP 2->82 84 7 other signatures 2->84 9 pre alert documents.exe 6 2->9         started        process3 file4 42 C:\Users\user\...\pre alert documents.exe.log, ASCII 9->42 dropped 44 eca0833a-0ab7-4e52-85da-8e1cb94f9958.exe, PE32 9->44 dropped 46 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 9->46 dropped 86 Writes to foreign memory regions 9->86 88 Allocates memory in foreign processes 9->88 90 Injects a PE file into a foreign processes 9->90 13 eca0833a-0ab7-4e52-85da-8e1cb94f9958.exe 44 2 9->13         started        15 edpnotify.exe 2 13 9->15         started        19 AdvancedRun.exe 1 9->19         started        signatures5 process6 dnsIp7 21 PkgMgr.exe 1 13->21         started        23 PkgMgr.exe 13->23         started        25 conhost.exe 13->25         started        64 172.111.153.127, 3033, 49770 M247GB United States 15->64 66 geoplugin.net 178.237.33.50, 49771, 80 ATOM86-ASATOM86NL Netherlands 15->66 70 Contains functionality to steal Chrome passwords or cookies 15->70 72 Contains functionality to inject code into remote processes 15->72 74 Contains functionality to steal Firefox passwords or cookies 15->74 76 Delayed program exit found 15->76 68 192.168.2.1 unknown unknown 19->68 27 AdvancedRun.exe 19->27         started        signatures8 process9 process10 29 Dism.exe 55 21->29         started        32 Dism.exe 23->32         started        file11 48 C:\Users\user\AppData\...\WimProvider.dll.mui, PE32 29->48 dropped 50 C:\Users\user\AppData\...\VhdProvider.dll.mui, PE32 29->50 dropped 52 C:\Users\user\...\UnattendProvider.dll.mui, PE32 29->52 dropped 60 49 other files (none is malicious) 29->60 dropped 34 DismHost.exe 29->34         started        36 conhost.exe 29->36         started        54 C:\Users\user\AppData\...\WimProvider.dll.mui, PE32 32->54 dropped 56 C:\Users\user\AppData\...\VhdProvider.dll.mui, PE32 32->56 dropped 58 C:\Users\user\...\UnattendProvider.dll.mui, PE32 32->58 dropped 62 49 other files (none is malicious) 32->62 dropped 38 conhost.exe 32->38         started        40 DismHost.exe 32->40         started        process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0639a34ed8b8a0702daec2d05da6afdd33c6c41dc2bb9cb2537c247825843adf/
Threat name:
ByteCode-MSIL.Downloader.Conjar
Create hunting rule
Status:
Malicious
First seen:
2022-06-01 18:37:05 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
18 of 26 (69.23%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ay42gtwyxcqhalnoylif3jvp3uz4nra5yk5zzmstpqshqjmehlpq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
01f5e461193a3adce502959e029cf52b8e9bf0a9cd1bf06c9088edddb4f643ab
RemcosRAT
0639a34ed8b8a0702daec2d05da6afdd33c6c41dc2bb9cb2537c247825843adf
RemcosRAT
26a2f8823cf62fe2f297178d880650845074c3de7a3615533e5daeb96cb06bb6
RemcosRAT
7a099c2a919928941a4357553300018cd8847760df7b17c2e7bde1daef328305
RemcosRAT
9ea26ea3cf4034580c0c02f1ce4627887fd5a68e069a2c4189c8f253b5919842
RemcosRAT
b69f04883131047159a3f3f13a7943ffdf43c742bc2a8994f7ef1f1a42c16eee
RemcosRAT
d4729baa39aa4e1052e0999c90450a4cdcd4c4e3831c9a791fb99b94036103b4
RemcosRAT
ee65625fd9417eea3e1f170b479f24807f2895bcc695ca63d4c9e573c60dacc2
RemcosRAT
+ 2'064 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost rat
Link:
https://tria.ge/reports/220601-y698jsbef4/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Checks computer location settings
Executes dropped EXE
Nirsoft
Remcos
Suspicious use of NtCreateUserProcessOtherParentProcess
Malware Config
C2 Extraction:
172.111.153.127:3033
Unpacked files
SH256 hash:
250a08505ba37ddf6bb9caccf5b6ec20c536057d31cff3cc8fa0c85fe0acfc5d
MD5 hash:
ef05f9436a1aa5e8d58ce5c75516e9df
SHA1 hash:
fbc579ba708f4ce54281c6cb83cbc2f9f900c9fe
Link:
https://www.unpac.me/results/97682498-3622-411e-9d82-02d0477723cd/
SH256 hash:
70b785e5cb5b2e61c0f5da4a71ab0bbd14d9a0849387f037e0d75cc1ffe0a082
MD5 hash:
5951b52c9b4d11ca7f4f33e5a3fb2c31
SHA1 hash:
0bc54fd699fff7b93e5c447a141c0d904924ab0d
Link:
https://www.unpac.me/results/97682498-3622-411e-9d82-02d0477723cd/
SH256 hash:
0639a34ed8b8a0702daec2d05da6afdd33c6c41dc2bb9cb2537c247825843adf
MD5 hash:
916e5acc3ae9ef32c065913b73dceb4f
SHA1 hash:
2e74ebf894739e35b0ffd299b22591e47feb9f54
Link:
https://www.unpac.me/results/97682498-3622-411e-9d82-02d0477723cd/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/0639a34ed8b8/report/overview.html
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/0639a34ed8b8a0702daec2d05da6afdd33c6c41dc2bb9cb2537c247825843adf

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: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

zip 270381aa74929cc3d5f011e2a58f9e864f439926367e7611a25a381ffd10490b

RemcosRAT

Executable exe 0639a34ed8b8a0702daec2d05da6afdd33c6c41dc2bb9cb2537c247825843adf

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/276177/
  
Dropped by
SHA256 270381aa74929cc3d5f011e2a58f9e864f439926367e7611a25a381ffd10490b
  
Dropped by
MD5 016847b156698dacba7cafff19e1fd61
  
Dropped by
SHA256 82957a37f32f9e2055c7bcdd39fe2415bbf02aa9898724a95e09cf8ac54cad26
  
Dropped by
MD5 9cf1e0801290969682299e71977bf961

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