MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 522735989689a96d0e10e926aae941e58a695062254573c5796bb129e4c7703e. 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


GuLoader


Vendor detections: 10


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

SHA256 hash: 522735989689a96d0e10e926aae941e58a695062254573c5796bb129e4c7703e
SHA3-384 hash: 9f5b3b9b10ede2c9cab49e678d20cbea1e00a581708fceba158501d278566b2828120a676284e477e8bc2711871b5ed7
SHA1 hash: a4e7f33de72ec1753bee291b2ef100ac50509d9c
MD5 hash: 88a45befbe18e459c1d8c6f34901386b
humanhash: alaska-early-april-uniform
File name:88a45befbe18e459c1d8c6f34901386b.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:106'496 bytes
First seen:2021-02-18 15:45:49 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 28cfb83efbb0b6bd426b66f31651da5c (16 x GuLoader, 1 x RemcosRAT)
ssdeep 1536:AgYMxGHRT3PWC78iQ8o8O+61kvJWi/X+v3S1NA:AcGROCgiQ8oBH2vJC
Threatray 218 similar samples on MalwareBazaar
TLSH 12A3F731B955DDF6D040C4358926F7AC4927BF324808AA1FB9CDBA1E1E3BAC29494D1F
Reporter abuse_ch
Tags:exe GuLoader


Avatar
abuse_ch
GuLoader payload URL:
http://mtspsmjeli.sch.id/cl/VK_Remcos%20v2_AxaGIU151.bin

Intelligence

File Origin
# of uploads :
1
# of downloads :
169
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Guloader
Create hunting rule
Link:
https://www.capesandbox.com/analysis/117827/
Detection(s):
Win.Malware.Generic-9833026-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
DNS request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
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
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Sending an HTTP GET request to an infection source
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 GuLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/611784
Signature
Contains functionality to hide a thread from the debugger
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Detected Remcos RAT
Detected unpacking (changes PE section rights)
Hides threads from debuggers
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
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file access)
Tries to steal Mail credentials (via file registry)
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected VB6 Downloader Generic
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 354908 Sample: 3661RJTi5M.exe Startdate: 18/02/2021 Architecture: WINDOWS Score: 100 57 Malicious sample detected (through community Yara rule) 2->57 59 Multi AV Scanner detection for submitted file 2->59 61 Detected Remcos RAT 2->61 63 7 other signatures 2->63 11 3661RJTi5M.exe 1 2->11         started        14 win.exe 1 2->14         started        16 win.exe 1 2->16         started        process3 signatures4 81 Detected RDTSC dummy instruction sequence (likely for instruction hammering) 11->81 83 Tries to detect Any.run 11->83 85 Tries to detect virtualization through RDTSC time measurements 11->85 87 Contains functionality to hide a thread from the debugger 11->87 18 3661RJTi5M.exe 4 10 11->18         started        89 Hides threads from debuggers 14->89 23 win.exe 6 14->23         started        25 win.exe 6 16->25         started        process5 dnsIp6 51 mtspsmjeli.sch.id 103.150.60.242, 49752, 49755, 49758 PC24NET-AS-IDPTPC24TelekomunikasiIndonesiaID unknown 18->51 47 C:\Users\user\AppData\Roaming\win.exe, PE32 18->47 dropped 49 C:\Users\user\...\win.exe:Zone.Identifier, ASCII 18->49 dropped 65 Tries to detect Any.run 18->65 67 Hides threads from debuggers 18->67 27 wscript.exe 1 18->27         started        file7 signatures8 process9 process10 29 cmd.exe 1 27->29         started        process11 31 win.exe 1 29->31         started        34 conhost.exe 29->34         started        signatures12 91 Multi AV Scanner detection for dropped file 31->91 93 Detected unpacking (changes PE section rights) 31->93 95 Tries to steal Mail credentials (via file registry) 31->95 97 5 other signatures 31->97 36 win.exe 2 7 31->36         started        process13 dnsIp14 53 hsyuwbvxczbansmloiujdhsbnbcgywqauaghxvz.ydns.eu 192.253.246.136, 2009, 49756, 49757 LEASEWEB-USA-NYC-11US United States 36->53 55 mtspsmjeli.sch.id 36->55 69 Tries to detect Any.run 36->69 71 Hides threads from debuggers 36->71 73 Injects a PE file into a foreign processes 36->73 40 win.exe 36->40         started        43 win.exe 13 36->43         started        45 win.exe 36->45         started        signatures15 process16 signatures17 75 Tries to steal Instant Messenger accounts or passwords 40->75 77 Tries to steal Mail credentials (via file access) 40->77 79 Tries to harvest and steal browser information (history, passwords, etc) 43->79
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/522735989689a96d0e10e926aae941e58a695062254573c5796bb129e4c7703e/
Threat name:
Win32.Trojan.Wacatac
Create hunting rule
Status:
Malicious
First seen:
2021-02-18 15:46:07 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kittlgewrguw2dqq5etkv2kb4wfgsudcevcxhrlznoystzghoa7a._file
Verdict:
malicious
Label(s):
guloader
Create hunting rule
Similar samples:
3cbf0aeafec688023948cad7bf7475270ba9cb1acb0078cf1a9d6288f2751a20
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6147decc439b9d258f5b19f77dfa47ea441e681c49e0b699533eea18104f4092
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67bf85e54212cc6dd8e3f3bdfe292d7440ae7f7ad5f131f9c8b5ea51a86c1e96
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6f0f5ac2a08c4746186a79f3afe48a614b1ed180ce830058805354bfa8cb1e8e
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8241caa4d6c5a09290864492d19dee143f0f80074d370135c0f91bad01c16ee3
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a8fe6d7fa624e8e96f71d3ff6375a012b44b51f06179feb7cef8c33fd6d38570
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bbfe5eaa0138f51710292488a384e4f6dcb65a6cba2a4c63387c714cec753d6e
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c6e5156c311412210237810450648947699d1c4862536a4e86b778e899627292
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c848b9f81ec7dcc330cc57ede3482805ccad25143eac801f7f56fc5cc0ccace5
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d98fd8189273e4f4fcbb8b1d5b32459b5d7adcd6eaff9efef0c32ace0fdfab0e
GuLoader
+ 208 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos persistence rat spyware
Link:
https://tria.ge/reports/210218-h6eynpx1ve/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Reads user/profile data of web browsers
Executes dropped EXE
NirSoft MailPassView
Nirsoft
Remcos
Unpacked files
SH256 hash:
49b04162c412105ab0857de16713724cbf3234a0b6ba51f3a5286312633f20c3
MD5 hash:
1f1b425190b2fb0396ad2d538b1060ba
SHA1 hash:
413f98641d46fdcabfcaf64f29495667de6282ea
Link:
https://www.unpac.me/results/e381a0e3-aab1-40de-b21a-b7deb3587bb1/
SH256 hash:
522735989689a96d0e10e926aae941e58a695062254573c5796bb129e4c7703e
MD5 hash:
88a45befbe18e459c1d8c6f34901386b
SHA1 hash:
a4e7f33de72ec1753bee291b2ef100ac50509d9c
Link:
https://www.unpac.me/results/e381a0e3-aab1-40de-b21a-b7deb3587bb1/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.16
Link:
https://yomi.yoroi.company/submissions/522735989689a96d0e10e926aae941e58a695062254573c5796bb129e4c7703e

File information

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

Web download

GuLoader

Executable exe 522735989689a96d0e10e926aae941e58a695062254573c5796bb129e4c7703e

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1016376/
  
URLhaus
https://urlhaus.abuse.ch/url/995738/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1017116/
Cape
Cape
https://www.capesandbox.com/analysis/117827/

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