MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef5551b32efae3527d147f40eaac18ab0213b7382d5d54bc67fd1c9911007480. 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: 13


Intelligence 13 IOCs YARA 6 File information Comments
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SHA256 hash: ef5551b32efae3527d147f40eaac18ab0213b7382d5d54bc67fd1c9911007480
SHA3-384 hash: 478c702cc91be0365bbc185a7c4a009d858b16e4cb97ffbc8ad726933543090f80fbb099f3ae1ca2a62dd50749f9ac77
SHA1 hash: 76a12baf54b1f66fbccc3728d3e1fc1ca663c6ee
MD5 hash: 1cb1b73c99d72a4d1dcc09858ad1cee5
humanhash: eleven-oklahoma-apart-wyoming
File name:STD 35 GA Plan_DOCX.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:697'856 bytes
First seen:2022-07-07 03:53:34 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'660 x AgentTesla, 19'470 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:ZEZqWjsZ5uEd2iNmG1ZHR6ycFXntDRTd5dDspL5xp9bW1/3VBDlt/:ZEZ/W5X1dwyMXntDVhijp9WRFF
TLSH T1C7E412013F5853A7DC3E37B4D8900D3243BE652A8822D7989E8763FB14677A2D953E4B
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 0801010c2c000100 (3 x Formbook, 1 x Loki)
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
257
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/285322/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/62c658f8c1b6cfcaa5ec68cd/reports/705b12ed-8dbe-42d1-b36c-d3939cfd74fa/overview
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/190d9c7d-b57d-46be-95fe-0c423498c2e4
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1026071
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Icon mismatch, binary includes an icon from a different legit application in order to fool users
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)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 658566 Sample: STD 35 GA Plan_DOCX.exe Startdate: 07/07/2022 Architecture: WINDOWS Score: 100 29 www.adityarrajput.com 2->29 31 adityarrajput.com 2->31 47 Multi AV Scanner detection for domain / URL 2->47 49 Malicious sample detected (through community Yara rule) 2->49 51 Antivirus detection for URL or domain 2->51 53 10 other signatures 2->53 10 STD 35 GA Plan_DOCX.exe 3 2->10         started        signatures3 process4 file5 27 C:\Users\user\...\STD 35 GA Plan_DOCX.exe.log, ASCII 10->27 dropped 55 Injects a PE file into a foreign processes 10->55 14 STD 35 GA Plan_DOCX.exe 10->14         started        signatures6 process7 signatures8 57 Modifies the context of a thread in another process (thread injection) 14->57 59 Maps a DLL or memory area into another process 14->59 61 Sample uses process hollowing technique 14->61 63 Queues an APC in another process (thread injection) 14->63 17 chkdsk.exe 14->17         started        20 explorer.exe 14->20 injected process9 dnsIp10 39 Modifies the context of a thread in another process (thread injection) 17->39 41 Maps a DLL or memory area into another process 17->41 43 Tries to detect virtualization through RDTSC time measurements 17->43 23 cmd.exe 1 17->23         started        33 madeinfrance.plus 185.221.182.223, 49840, 80 TOLVUTHJONUSTANIS Ukraine 20->33 35 www.slotsformula.com 104.21.22.60, 49814, 80 CLOUDFLARENETUS United States 20->35 37 3 other IPs or domains 20->37 45 System process connects to network (likely due to code injection or exploit) 20->45 signatures11 process12 process13 25 conhost.exe 23->25         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ef5551b32efae3527d147f40eaac18ab0213b7382d5d54bc67fd1c9911007480/
Threat name:
ByteCode-MSIL.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-07-07 03:54:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=55kvdmzo7lrve7iup5aovlayvmbbhnzyfvovjpdh7uojseiaosaa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:formbook family:xloader campaign:iewb loader persistence rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220707-ef76qaehc6/
Behaviour
Gathers network information
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Xloader Payload
Formbook
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
Unpacked files
SH256 hash:
526ef5df9d974a223af97e351e14e7a3010e287b7e6a1c3cdb132a6db4314326
MD5 hash:
0fb0636cafac3aa43f67017f1fe151ec
SHA1 hash:
8e29b890c4a4a22060bffde9a11631b7af6fb28e
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/df92566c-78d8-450b-b24e-df94f386fb97/
Parent samples :
0323d5159dd1425833a2b88830923e17810a4bbbc70dd686702ce4fad69d65e4
42e5467c1516b5291491f4acbac29889575738c9f0652655ce7b7eeffa2374d4
2c6f3126b960f02205390cf54a74de6e32d53cc1d6db64cc4744c9cca63ecca6
0c0567f75c861c3950dcdf2b5bdb1f9852fd8cd518587eea22d43a5273dcfa18
9696d3ec13f85ada39b140ae0096e765db0ff630f351ffa1e96484f6a4f2f030
ef5551b32efae3527d147f40eaac18ab0213b7382d5d54bc67fd1c9911007480
44079f7afc8f2b9900564b14b8e3e9e5b8de7ad0b4a1d514e5ff644def494d4e
SH256 hash:
6cd3f142833a25f55d23f7cdd74b34eeed915e08ce69cba7443595cc297b0972
MD5 hash:
f4d4ea998cffb7b65d9fc2f4236059e2
SHA1 hash:
e0ce3813b431cebda830326f0c056b26514d8d77
Link:
https://www.unpac.me/results/df92566c-78d8-450b-b24e-df94f386fb97/
SH256 hash:
e6ee3ebd07f9903ae0fba88a84119223975f35a3be2f7b58b00b582ebcaa433f
MD5 hash:
0a79286c8bbcdbf35b7ba06809b11f42
SHA1 hash:
a66a0213fbbc5dba5faaac46047ef2b5994c69a6
Link:
https://www.unpac.me/results/df92566c-78d8-450b-b24e-df94f386fb97/
SH256 hash:
3b59fe180dd50e3f3d4fdcbdd4e7a2d4e3e1c85ae43cb4f3716c4be41e9ec2ae
MD5 hash:
9ea556e333e216a65aa09c102f36004f
SHA1 hash:
814c07f1dc68bd61840384aac3aa8346d9f8148f
Link:
https://www.unpac.me/results/df92566c-78d8-450b-b24e-df94f386fb97/
SH256 hash:
8808b5906eb0861ce50ba9beeffe32a4203d8534bbe95aba4e9d1566ae916236
MD5 hash:
b5391f26162bd00dc2353d6b41a0b559
SHA1 hash:
5c54ace97c1ed855aea699d387bd83c9cce49b56
Link:
https://www.unpac.me/results/df92566c-78d8-450b-b24e-df94f386fb97/
SH256 hash:
ef5551b32efae3527d147f40eaac18ab0213b7382d5d54bc67fd1c9911007480
MD5 hash:
1cb1b73c99d72a4d1dcc09858ad1cee5
SHA1 hash:
76a12baf54b1f66fbccc3728d3e1fc1ca663c6ee
Link:
https://www.unpac.me/results/df92566c-78d8-450b-b24e-df94f386fb97/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ef5551b32efa/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/ef5551b32efae3527d147f40eaac18ab0213b7382d5d54bc67fd1c9911007480

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:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

Malspam

Formbook

Executable exe ef5551b32efae3527d147f40eaac18ab0213b7382d5d54bc67fd1c9911007480

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/285322/

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