MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c75eff07a3519dee7ab981166c1b6ff851d1e826e3ef5f0e36250b5983e3095c. 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 4 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c75eff07a3519dee7ab981166c1b6ff851d1e826e3ef5f0e36250b5983e3095c
SHA3-384 hash: c2ff757f91d83fd881b873f663d1204548c97520fef6029c435b726a252cc7b38c815025461a06113047037c0f309f7c
SHA1 hash: 882e1ba33292285d86d7d99b3e9d9a59755ad9d1
MD5 hash: 4d19ccec518e703176a676ab920421fc
humanhash: timing-purple-beer-lactose
File name:4d19ccec518e703176a676ab920421fc
Download: download sample
Signature Formbook
Create hunting rule
File size:965'120 bytes
First seen:2021-08-12 13:53:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 39334fad6fc37ecf56243de5802e190c (1 x RemcosRAT, 1 x Formbook, 1 x OskiStealer)
ssdeep 12288:lq1zaytHkdB6KK/2v7YNZIeT76kASvukn/rML9zpteqDaGuI9:lqVayP/2TYNhaliD4eqDaGD
Threatray 6'800 similar samples on MalwareBazaar
TLSH T138259F36B6E17437C2571D3DBC4B97A9A826B9942F2C24466BFC1E0C9F3D2813939346
dhash icon 36f0390284e2da70 (12 x RemcosRAT, 7 x Formbook, 1 x OskiStealer)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
373
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Transfer_form_$157,890.xlsx
Verdict:
Malicious activity
Analysis date:
2021-08-12 12:35:06 UTC
Tags:
encrypted exploit CVE-2017-11882
Link:
https://app.any.run/tasks/ad93070d-64f7-4186-97ae-8be980de903b

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/178762/
Detection(s):
SecuriteInfo.com.W32.AIDetect.malware2.22844.10586.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
DNS request
Connection attempt
Sending a custom TCP request
Creating a file
Deleting a recently created file
Running batch commands
Creating a process with a hidden window
Launching a process
Launching cmd.exe command interpreter
Sending an HTTP GET request
Forced shutdown of a system process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a system process
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/3bd2ef9b-4a36-4bb0-9857-6e6563b71b43
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/831809
Signature
Allocates memory in foreign processes
Antivirus detection for URL or domain
Creates a thread in another existing process (thread injection)
Injects a PE file into a foreign processes
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Execution from Suspicious Folder
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
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 464238 Sample: A08j024qJB Startdate: 12/08/2021 Architecture: WINDOWS Score: 100 58 www.cannamalism.com 2->58 60 www.blueline-productions.co.uk 2->60 62 2 other IPs or domains 2->62 96 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->96 98 Malicious sample detected (through community Yara rule) 2->98 100 Antivirus detection for URL or domain 2->100 102 3 other signatures 2->102 11 A08j024qJB.exe 1 24 2->11         started        signatures3 process4 dnsIp5 82 sn-files.fe.1drv.com 11->82 84 onedrive.live.com 11->84 86 dkzoxq.sn.files.1drv.com 11->86 56 C:\Users\Public\Libraries\...\Xmfxitv.exe, PE32 11->56 dropped 122 Writes to foreign memory regions 11->122 124 Allocates memory in foreign processes 11->124 126 Creates a thread in another existing process (thread injection) 11->126 128 Injects a PE file into a foreign processes 11->128 16 logagent.exe 11->16         started        19 cmd.exe 1 11->19         started        21 cmd.exe 1 11->21         started        file6 signatures7 process8 signatures9 88 Modifies the context of a thread in another process (thread injection) 16->88 90 Maps a DLL or memory area into another process 16->90 92 Sample uses process hollowing technique 16->92 94 2 other signatures 16->94 23 explorer.exe 4 4 16->23 injected 27 reg.exe 1 19->27         started        29 conhost.exe 19->29         started        31 cmd.exe 1 21->31         started        33 conhost.exe 21->33         started        process10 dnsIp11 76 www.delhibudokankarate.com 154.215.87.120, 49749, 80 POWERLINE-AS-APPOWERLINEDATACENTERHK Seychelles 23->76 78 www.mobiessence.com 52.58.78.16, 49750, 80 AMAZON-02US United States 23->78 80 www.candlewooddmc.com 23->80 120 System process connects to network (likely due to code injection or exploit) 23->120 35 Xmfxitv.exe 16 23->35         started        39 Xmfxitv.exe 16 23->39         started        41 wscript.exe 23->41         started        43 conhost.exe 27->43         started        45 conhost.exe 31->45         started        signatures12 process13 dnsIp14 64 sn-files.fe.1drv.com 35->64 66 onedrive.live.com 35->66 68 dkzoxq.sn.files.1drv.com 35->68 104 Multi AV Scanner detection for dropped file 35->104 106 Writes to foreign memory regions 35->106 108 Allocates memory in foreign processes 35->108 47 DpiScaling.exe 35->47         started        70 sn-files.fe.1drv.com 39->70 72 onedrive.live.com 39->72 74 dkzoxq.sn.files.1drv.com 39->74 110 Creates a thread in another existing process (thread injection) 39->110 112 Injects a PE file into a foreign processes 39->112 50 mobsync.exe 39->50         started        114 Modifies the context of a thread in another process (thread injection) 41->114 116 Maps a DLL or memory area into another process 41->116 118 Tries to detect virtualization through RDTSC time measurements 41->118 52 cmd.exe 1 41->52         started        signatures15 process16 signatures17 130 Tries to detect virtualization through RDTSC time measurements 47->130 54 conhost.exe 52->54         started        process18
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c75eff07a3519dee7ab981166c1b6ff851d1e826e3ef5f0e36250b5983e3095c/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2021-08-12 11:53:49 UTC
File Type:
PE (Exe)
Extracted files:
10
AV detection:
15 of 28 (53.57%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=y5pp6b5dkgo646vzqelgyg3p7bi5d2bg4pxv6drweufvta7dbfoa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
22bd5ba035c9dcdda222f812537d8b49241b50c55042fd3b902ca8b36d17a398
Formbook
6b1c4ecf03e71ee2c00deb9b82e805b16adaf5e01691f7d3fd1a972087c7481a
Formbook
760b2466db1fdc2d2c1651a730cfd6c14bfbcbd8f69eeb56ec8426d46784f4b3
Formbook
7f7af3d03481bb68e11a68e958ce6d8e96701a053eaa458e7010a4a85643cad3
Formbook
be6c146acab77dfb4116c0805a1244c79a5da7393ce8ee582f59ae8c1773e406
Formbook
d30f6c3814efbb4b2e5d9ae0f5d09a4a7ba04cc8a3456590d64cf9bfed279901
Formbook
e6bd5f8475731bcca5f6b74327a68ee4b7fa5b0662521feff1d92424da149151
Formbook
+ 6'790 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:6mam loader persistence rat suricata
Link:
https://tria.ge/reports/210812-l6lbwaksds/
Behaviour
Modifies registry key
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
Suspicious use of SetThreadContext
Adds Run key to start application
Blocklisted process makes network request
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.mobiessence.com/6mam/
Unpacked files
SH256 hash:
795b2b5d6668147d7924ac96f90741ddc2a2b5003f455fb842b613a286fbf8fc
MD5 hash:
53011b69a7231aea23d66805a681144b
SHA1 hash:
e3d0d157e763c865e79ccc5bedc2fd5fd90413f7
Link:
https://www.unpac.me/results/f0c8793b-060d-41b8-a44c-066b892aebce/
SH256 hash:
c75eff07a3519dee7ab981166c1b6ff851d1e826e3ef5f0e36250b5983e3095c
MD5 hash:
4d19ccec518e703176a676ab920421fc
SHA1 hash:
882e1ba33292285d86d7d99b3e9d9a59755ad9d1
Link:
https://www.unpac.me/results/f0c8793b-060d-41b8-a44c-066b892aebce/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/c75eff07a351/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c75eff07a3519dee7ab981166c1b6ff851d1e826e3ef5f0e36250b5983e3095c

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:INDICATOR_SUSPICIOUS_EXE_UACBypass_EnvVarScheduledTasks
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC (ab)using Environment Variables in Scheduled Tasks
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
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.

Web download

Formbook

Executable exe c75eff07a3519dee7ab981166c1b6ff851d1e826e3ef5f0e36250b5983e3095c

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1527827/
Cape
Cape
https://www.capesandbox.com/analysis/178762/

Comments


Avatar
zbet commented on 2021-08-12 13:53:57 UTC

url : hxxp://75.127.1.239/win/vbc.exe