MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dc44140377b017e013ca665c49ebacd386d4a4ca19329e77d9dfbb86010e66a5. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: dc44140377b017e013ca665c49ebacd386d4a4ca19329e77d9dfbb86010e66a5
SHA3-384 hash: 1c2a520b33f4822420090d8d63daef9369b822af471a047a91884e7be719fa91243239d0f86abe130c54196641cbeb4a
SHA1 hash: e7403b9147256065525e8c9316fac18b3e3451df
MD5 hash: 59037c9fbbca6e6309aff2773c244719
humanhash: salami-emma-zebra-winter
File name:sky7765463554.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:275'718 bytes
First seen:2022-04-18 12:38:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 56a78d55f3f7af51443e58e0ce2fb5f6 (719 x GuLoader, 451 x Formbook, 295 x Loki)
ssdeep 6144:HNeZmnBQ+eU+6FEL6FVAShNs3VWneBs086P12G72jroolx:HNlnreU+6FEGTASoF/sgP12G7Yko
TLSH T134441218B1F1C816ECD285B1587B47A5FB598D372DB586072710AFCE3E23291A70EB1B
TrID 48.8% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
16.4% (.EXE) Win64 Executable (generic) (10523/12/4)
10.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.0% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
275
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/264333/
Detection(s):
SecuriteInfo.com.Trojan.NSISX.Spy.Gen.2.6896.UNOFFICIAL
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
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
control.exe overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/625d5bfeffe27d5119ff29cd/reports/12ba1076-29b8-428d-b655-d4512aee96c8/overview
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/05b556ee-7bc1-41f5-acd1-fc14fc9d000b
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/978193
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
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 virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 610680 Sample: sky7765463554.exe Startdate: 18/04/2022 Architecture: WINDOWS Score: 100 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Antivirus detection for URL or domain 2->53 55 5 other signatures 2->55 11 sky7765463554.exe 18 2->11         started        process3 file4 33 C:\Users\user\AppData\...\xlybzxwipp.exe, PE32 11->33 dropped 14 xlybzxwipp.exe 1 11->14         started        process5 signatures6 67 Multi AV Scanner detection for dropped file 14->67 69 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 14->69 71 Tries to detect virtualization through RDTSC time measurements 14->71 73 Injects a PE file into a foreign processes 14->73 17 xlybzxwipp.exe 14->17         started        20 conhost.exe 14->20         started        process7 signatures8 41 Modifies the context of a thread in another process (thread injection) 17->41 43 Maps a DLL or memory area into another process 17->43 45 Sample uses process hollowing technique 17->45 47 Queues an APC in another process (thread injection) 17->47 22 explorer.exe 17->22 injected process9 dnsIp10 35 www.tzjisheng.com 154.85.152.171, 49780, 80 DXTL-HKDXTLTseungKwanOServiceHK Seychelles 22->35 37 www.thegioigaubong97.site 22->37 39 2 other IPs or domains 22->39 57 System process connects to network (likely due to code injection or exploit) 22->57 59 Uses netstat to query active network connections and open ports 22->59 26 NETSTAT.EXE 22->26         started        signatures11 process12 signatures13 61 Modifies the context of a thread in another process (thread injection) 26->61 63 Maps a DLL or memory area into another process 26->63 65 Tries to detect virtualization through RDTSC time measurements 26->65 29 cmd.exe 1 26->29         started        process14 process15 31 conhost.exe 29->31         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/dc44140377b017e013ca665c49ebacd386d4a4ca19329e77d9dfbb86010e66a5/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-04-15 12:02:15 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
30 of 42 (71.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=3rcbia3xwal6ae6kmzoet25m2odnjjgkdezj456z365ymaiom2sq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:sn31 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220418-pvl7xafffq/
Behaviour
Gathers network information
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
Suspicious use of SetThreadContext
Loads dropped DLL
Blocklisted process makes network request
Executes dropped EXE
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
b02dc5b7e58275ad45eb4df02325f5fca9204fa17b52d33bdbc50ffdc6d46e3c
MD5 hash:
6172516b2cf7a0ce0ee0e31f64161e13
SHA1 hash:
877e795a74b2bc6ceffcd6b141e0acc97beb21d7
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/d79cfaab-8185-403f-988e-861457de7be6/
Parent samples :
dc44140377b017e013ca665c49ebacd386d4a4ca19329e77d9dfbb86010e66a5
2537720d5a68fae9bd2bd01925102deb25af75b86fbdc295f166efc97e636cfe
77c54b077789c0f6523b29fec23823227ffeca21d82c627e63f92d95b59e1905
35edcaa0f180ef140f70ee241a648c6335cf3055dcf2d6074d5ef7966b55925d
47796a46d5c191e29988d2d657332b3d7f9f5278b3951049e98f80a2b0c11d5e
SH256 hash:
9fc6d81883c2271a059daf8be9d7df24e2872acf6a9dc2914610dcc15104e95d
MD5 hash:
402cb8aec214a62f2a30d15e1cdced96
SHA1 hash:
50689a9eddf715f06a989599a3a2565ba9697141
Link:
https://www.unpac.me/results/d79cfaab-8185-403f-988e-861457de7be6/
SH256 hash:
dc44140377b017e013ca665c49ebacd386d4a4ca19329e77d9dfbb86010e66a5
MD5 hash:
59037c9fbbca6e6309aff2773c244719
SHA1 hash:
e7403b9147256065525e8c9316fac18b3e3451df
Link:
https://www.unpac.me/results/d79cfaab-8185-403f-988e-861457de7be6/
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/dc44140377b017e013ca665c49ebacd386d4a4ca19329e77d9dfbb86010e66a5

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: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 dc44140377b017e013ca665c49ebacd386d4a4ca19329e77d9dfbb86010e66a5

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/264333/

Comments