MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 49a63eb1c6fd5d4b22396bb8a8397c3bf124c3f94d104bc2a7a304f4457b4526. 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


Formbook


Vendor detections: 9


Intelligence 9 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 49a63eb1c6fd5d4b22396bb8a8397c3bf124c3f94d104bc2a7a304f4457b4526
SHA3-384 hash: d376abb02927a70d3b1a9893cf5f072fdb6f353b06f2752229f61549227fdfe8fc2ac967632f234ccaa7d6d00d68ddc5
SHA1 hash: f0939317801500dd2b149175d7ded6359c4184c2
MD5 hash: 6c8ebc5e25f15b14246723d0a2f86597
humanhash: fourteen-california-eight-oven
File name:refsvrg.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:537'600 bytes
First seen:2020-07-23 11:47:08 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 6144:iC6A9jUTkzJG2GhNFEJC3m64DFU2r707ozIdf9sLkie6jnjx/:i1AiYNG2iNyJ+mpU2H077df9U
Threatray 5'069 similar samples on MalwareBazaar
TLSH 26B4AE3ABE028834C63F01F964AA1ED1A5395B273610CE6E63E7223CDE1355BB75611F
Reporter JAMESWT_WT
Tags:FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
94
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/31745/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Win.Malware.Formbook-7399661-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/396280
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 250472 Sample: refsvrg.exe Startdate: 23/07/2020 Architecture: WINDOWS Score: 100 48 www.eventiedesideri.com 2->48 52 Malicious sample detected (through community Yara rule) 2->52 54 Antivirus / Scanner detection for submitted sample 2->54 56 Multi AV Scanner detection for submitted file 2->56 58 5 other signatures 2->58 11 refsvrg.exe 4 2->11         started        signatures3 process4 file5 44 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 11->44 dropped 46 C:\Users\user\AppData\...\refsvrg.exe.log, ASCII 11->46 dropped 72 Writes to foreign memory regions 11->72 74 Allocates memory in foreign processes 11->74 76 Injects a PE file into a foreign processes 11->76 15 AddInProcess32.exe 11->15         started        signatures6 process7 signatures8 78 Modifies the context of a thread in another process (thread injection) 15->78 80 Maps a DLL or memory area into another process 15->80 82 Sample uses process hollowing technique 15->82 84 2 other signatures 15->84 18 explorer.exe 15->18 injected process9 dnsIp10 50 www.negotiateking.com 91.195.240.94, 49743, 80 SEDO-ASDE Germany 18->50 60 System process connects to network (likely due to code injection or exploit) 18->60 22 colorcpl.exe 1 19 18->22         started        signatures11 process12 file13 36 C:\Users\user\AppData\...\7MNlogrv.ini, data 22->36 dropped 38 C:\Users\user\AppData\...\7MNlogri.ini, data 22->38 dropped 40 C:\Users\user\AppData\...\7MNlogrf.ini, data 22->40 dropped 62 Detected FormBook malware 22->62 64 Tries to steal Mail credentials (via file access) 22->64 66 Tries to harvest and steal browser information (history, passwords, etc) 22->66 68 3 other signatures 22->68 26 cmd.exe 2 22->26         started        30 cmd.exe 1 22->30         started        signatures14 process15 file16 42 C:\Users\user\AppData\Local\Temp\DB1, SQLite 26->42 dropped 70 Tries to harvest and steal browser information (history, passwords, etc) 26->70 32 conhost.exe 26->32         started        34 conhost.exe 30->34         started        signatures17 process18
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/49a63eb1c6fd5d4b22396bb8a8397c3bf124c3f94d104bc2a7a304f4457b4526/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-07-22 23:12:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jgtd5mog7vouwirzno4kqol4hpysjq7zjuiexqvhumcpirl3iuta._file
Verdict:
malicious
Label(s):
netwirerc
Create hunting rule
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Formbook
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a76588c6088ba6b56904fa50df8547ff3b93a67b520769d73e92b04bb8d718d6
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bfb2fd4412e9cd136a794f61436d597d7d58fb4fd842509dabe7a70344e4fd97
Formbook
+ 5'059 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/200723-rlkwp2vly6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Program crash
Suspicious use of SetThreadContext
Checks whether UAC is enabled
Loads dropped DLL
Executes dropped EXE
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/49a63eb1c6fd5d4b22396bb8a8397c3bf124c3f94d104bc2a7a304f4457b4526

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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:win_formbook_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.

Web download

Formbook

Executable exe 49a63eb1c6fd5d4b22396bb8a8397c3bf124c3f94d104bc2a7a304f4457b4526

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/418321/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/31745/

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