MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f840ca48e6381b385534156b8245c39dee4d1c95e18569c91b5537ff2f20aa7d. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f840ca48e6381b385534156b8245c39dee4d1c95e18569c91b5537ff2f20aa7d
SHA3-384 hash: fc583a3fbdc84abaea79e09f6df973e6c1c3b34ae217469d719cac5cbc8bd452b47c0005638ed42a7685e77a9c078dc2
SHA1 hash: 0d961900905b134eca222792806e63bd7a43cfa3
MD5 hash: 7f0a0bc19a6da99c8ab7f8f77a1a6a59
humanhash: sink-massachusetts-video-hot
File name:yutrre123.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:260'317 bytes
First seen:2021-10-08 13:26:22 UTC
Last seen:2021-10-08 16:43:07 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b76363e9cb88bf9390860da8e50999d2 (464 x Formbook, 184 x AgentTesla, 122 x SnakeKeylogger)
ssdeep 6144:F8LxBsRJ0tejXT7jiZLGWeCNPZb9Y5mjHZmYxb5zDp:/R5njiZjeCze5mj5mYzp
Threatray 10'103 similar samples on MalwareBazaar
TLSH T144441202DBD2D037D062973021A71FB4F7BF8A1C3263660B8BAC4EB7E9B55C305295A5
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
5
# of downloads :
311
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
yutrre123.exe
Verdict:
Malicious activity
Analysis date:
2021-10-08 13:27:14 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/62afbecf-2044-4832-ad7e-bacf6ba4fc69

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/196169/
Detection(s):
SecuriteInfo.com.Trojan.NSISX.Spy.Gen.4.24098.3032.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a file
Creating a window
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
60%
Link:
https://www.filescan.io/uploads/6160472a98a6280f39348a9a/reports/531fe8f3-4478-4e57-9b79-4466fd9f5bdb/overview
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/867113
Signature
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
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)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 499541 Sample: yutrre123.exe Startdate: 08/10/2021 Architecture: WINDOWS Score: 100 31 www.ohioleads.net 2->31 39 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->39 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 5 other signatures 2->45 11 yutrre123.exe 17 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\ypobihvdj.dll, PE32 11->29 dropped 57 Detected unpacking (changes PE section rights) 11->57 59 Tries to detect virtualization through RDTSC time measurements 11->59 61 Injects a PE file into a foreign processes 11->61 15 yutrre123.exe 11->15         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 15->63 65 Maps a DLL or memory area into another process 15->65 67 Sample uses process hollowing technique 15->67 69 Queues an APC in another process (thread injection) 15->69 18 explorer.exe 15->18 injected process9 dnsIp10 33 www.ip-15-235-90.net 213.186.33.5, 49822, 80 OVHFR France 18->33 35 www.schwa-bingcorp.com 18->35 37 schwa-bingcorp.com 34.102.136.180, 49787, 80 GOOGLEUS United States 18->37 47 System process connects to network (likely due to code injection or exploit) 18->47 22 raserver.exe 18->22         started        signatures11 process12 signatures13 49 Self deletion via cmd delete 22->49 51 Modifies the context of a thread in another process (thread injection) 22->51 53 Maps a DLL or memory area into another process 22->53 55 Tries to detect virtualization through RDTSC time measurements 22->55 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/f840ca48e6381b385534156b8245c39dee4d1c95e18569c91b5537ff2f20aa7d/
Threat name:
Win32.Trojan.Nsisx
Create hunting rule
Status:
Malicious
First seen:
2021-10-08 12:34:37 UTC
AV detection:
11 of 28 (39.29%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=7bamushghantqvjucvvyerodtxxe2hev4gcwtsi3ku376lzavj6q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
2361714a402b085426e5712ff07a8ada008ae9bf76e8ee248cc7ca651c7ac752
Formbook
638394ba0aa51689488ddd944d4b358f02fde988c65842110bdc089e04e9f138
Formbook
7249d67d49a862e577120d3125e33566c61241969b4f48d701de97a5fe0abc04
Formbook
90661f85c7864f95181eceebf32eafd0b4b166aebdfdf5529edfc3a3dd6c0715
Formbook
90e6f10a0caabd250a9d43d12982b5861ec160177d99ad07ce68bd18d103736c
Formbook
d16da4e6a63f26601dd3c961f31708db79be1aead7cf3834fafa47095b1a45a6
Formbook
fa0d4eeae6c743ddc44d9664b0e6d44238beff477d1f4e9a560e68026a4264d9
Formbook
fedeb19031bcc0941b0943dd3ed45ee6095b8c489c072c85e513b414abf8acf5
Formbook
+ 10'093 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:rv9n rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/211008-qp417sedhj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
Loads dropped DLL
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.cjspizza.net/rv9n/
Unpacked files
SH256 hash:
2179d3c7ad7d18eec20e5bc3683bab7b61dbfe411232a54e0c645f6a215d0375
MD5 hash:
9bc9a58dcd03a53026a89565279639d4
SHA1 hash:
c9682759aab10a14824fdbe08a0503246d39b579
Link:
https://www.unpac.me/results/f3cf57a9-11af-4c27-b2c9-c0ae5aa8b836/
SH256 hash:
f840ca48e6381b385534156b8245c39dee4d1c95e18569c91b5537ff2f20aa7d
MD5 hash:
7f0a0bc19a6da99c8ab7f8f77a1a6a59
SHA1 hash:
0d961900905b134eca222792806e63bd7a43cfa3
Link:
https://www.unpac.me/results/f3cf57a9-11af-4c27-b2c9-c0ae5aa8b836/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.47
Link:
https://yomi.yoroi.company/submissions/f840ca48e6381b385534156b8245c39dee4d1c95e18569c91b5537ff2f20aa7d

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time

File information

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

Malspam

Formbook

Executable exe f840ca48e6381b385534156b8245c39dee4d1c95e18569c91b5537ff2f20aa7d

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/196169/

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