MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 42f8e33a2ee49ddb75c5e436fb1c9279afb9f19b93103fb0a55304447a64eb4d. 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: 12


Intelligence 12 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 42f8e33a2ee49ddb75c5e436fb1c9279afb9f19b93103fb0a55304447a64eb4d
SHA3-384 hash: 67d03cd64a5c3a2ef52848396717069098de2ab4fc551488108e89aa46465506a37475081b51ce126e1df79ad794924b
SHA1 hash: d983f1cc314ea88708e4def5c1ecd8f03c9c02bb
MD5 hash: 63421bf36d396288842256d3d08bc755
humanhash: violet-jupiter-kentucky-autumn
File name:rock55012.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:539'614 bytes
First seen:2021-08-19 14:52:06 UTC
Last seen:2021-08-23 07:01:44 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 4f489b335db6d5ec89d1f80710469941 (2 x Formbook, 2 x Loki, 1 x AZORult)
ssdeep 12288:IWkuQz+OdxvB2tIIbTEiD1kZkdQKC8dGJ2KRXLRY3ikljU1rwRgMM97lVwnxo7m0:IWkuQzgEiD14kdQ4dGJ2KRXLRY3icIo6
TLSH T1A6B4D010BA808032C673383186B4D6F14E6EBC312D259E9F97D83A355F74691DA35B6F
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
152
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
rock55012.exe
Verdict:
Malicious activity
Analysis date:
2021-08-19 14:54:38 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/41957c5a-bfe0-4e5d-9f06-1f7212b03a45

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/180724/
Detection(s):
SecuriteInfo.com.Trojan.Win32.Save.a.19252.28629.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Unauthorized injection to a recently created process
Launching a process
Launching cmd.exe command interpreter
Sending a UDP request
DNS request
Connection attempt
Sending an HTTP GET request
Setting browser functions hooks
Forced shutdown of a system process
Unauthorized injection to a system process
Unauthorized injection to a browser 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.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/686e0c6c-1a62-489e-a977-ab1e3ff48bf4
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/835881
Signature
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Found malware configuration
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
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 signatures2 2 Behavior Graph ID: 468312 Sample: rock55012.exe Startdate: 19/08/2021 Architecture: WINDOWS Score: 100 33 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->33 35 Found malware configuration 2->35 37 Malicious sample detected (through community Yara rule) 2->37 39 4 other signatures 2->39 10 rock55012.exe 2->10         started        process3 signatures4 47 Detected unpacking (changes PE section rights) 10->47 49 Maps a DLL or memory area into another process 10->49 51 Tries to detect virtualization through RDTSC time measurements 10->51 13 rock55012.exe 10->13         started        process5 signatures6 53 Modifies the context of a thread in another process (thread injection) 13->53 55 Maps a DLL or memory area into another process 13->55 57 Sample uses process hollowing technique 13->57 59 Queues an APC in another process (thread injection) 13->59 16 explorer.exe 13->16 injected process7 dnsIp8 27 www.richmondpistolpermit.com 208.92.209.208, 49736, 80 ENTERHOST-ASUS United States 16->27 29 www.infomediosdigital.com 208.91.197.13, 49739, 80 CONFLUENCE-NETWORK-INCVG Virgin Islands (BRITISH) 16->29 31 System process connects to network (likely due to code injection or exploit) 16->31 20 control.exe 16->20         started        signatures9 process10 signatures11 41 Modifies the context of a thread in another process (thread injection) 20->41 43 Maps a DLL or memory area into another process 20->43 45 Tries to detect virtualization through RDTSC time measurements 20->45 23 cmd.exe 1 20->23         started        process12 process13 25 conhost.exe 23->25         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/42f8e33a2ee49ddb75c5e436fb1c9279afb9f19b93103fb0a55304447a64eb4d/
Threat name:
Win32.Spyware.OutBreak
Create hunting rule
Status:
Malicious
First seen:
2021-08-19 14:09:38 UTC
AV detection:
19 of 27 (70.37%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=il4ogoro4so5w5of4q3pwhespgx3t4m3smid7mffkmcei6te5ngq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:k1rc rat spyware stealer trojan
Link:
https://tria.ge/reports/210819-9wk7gy8d1s/
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
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.fbrblog.com/k1rc/
Unpacked files
SH256 hash:
af4866e6995a9fee2a6c7e5c6e1bcda196c1174740a8b13b74adcf28de1ad0df
MD5 hash:
1631da1a076efcd8bd8fd111724b99ce
SHA1 hash:
01f1909cbe6f944862657ed8aa5d3db84a4a6ae3
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/b248e041-50fc-48ff-ba7b-ada5ccc8119b/
Parent samples :
0fd4759551d1a32568250aac71951d0eec9d673e205644a45e9cbf2192de2c40
d12401aff6e577ad268923a0310d09931870ad0f5c557245376ca0487e4be96d
497d83f4debdbc49d2cfb27433de383cd4aac3061bde01e4799d0274a3ef5615
9f8faf1ca8d3262940620bcb00487188e8657336cc3cb498ba4ad90ae96a59af
42f8e33a2ee49ddb75c5e436fb1c9279afb9f19b93103fb0a55304447a64eb4d
c2bde78efbaeb33b33e000a332b10191adf6c2b1e5d30d8cb3a9042419e97922
SH256 hash:
42f8e33a2ee49ddb75c5e436fb1c9279afb9f19b93103fb0a55304447a64eb4d
MD5 hash:
63421bf36d396288842256d3d08bc755
SHA1 hash:
d983f1cc314ea88708e4def5c1ecd8f03c9c02bb
Link:
https://www.unpac.me/results/b248e041-50fc-48ff-ba7b-ada5ccc8119b/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/42f8e33a2ee49ddb75c5e436fb1c9279afb9f19b93103fb0a55304447a64eb4d

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 42f8e33a2ee49ddb75c5e436fb1c9279afb9f19b93103fb0a55304447a64eb4d

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/180724/

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