MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b4efdb81c426d5bfcd3ec8f3c34e573a97bf9644bd6524b0e87baa0931775f8. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4b4efdb81c426d5bfcd3ec8f3c34e573a97bf9644bd6524b0e87baa0931775f8
SHA3-384 hash: 72935e3e8a56b0931c3cdcf8ae5ac9c96afd55380d45a853485594734b562e4817f5d3997cd2744180fb826e7728954f
SHA1 hash: b1d93a7926a981ae44af3a53133545a903f4f364
MD5 hash: 5b38031e274923f2d477a9612edec8f2
humanhash: cola-spring-snake-nevada
File name:invscan052021.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:855'552 bytes
First seen:2021-05-11 13:47:04 UTC
Last seen:2021-05-11 14:04:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'603 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:Z+oreiGbaMHhv8AMWRLDKqu/kVcY7DOL0:Z+oreiG2+58A9RLDK9/kVTe
Threatray 5'258 similar samples on MalwareBazaar
TLSH 0C0523AB23D05A18D0BD87B1B461155003F4B9A6E227EB0D6FC686EC05B77D4CB62BD3
Reporter lowmal3
Tags:FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
176
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/155121/
Detection(s):
SecuriteInfo.com.Scr.Malcodegdn30.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Connection attempt
Sending a custom TCP request
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.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/778693
Signature
C2 URLs / IPs found in malware configuration
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)
Multi AV Scanner detection for submitted file
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 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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 411102 Sample: invscan052021.exe Startdate: 11/05/2021 Architecture: WINDOWS Score: 100 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 6 other signatures 2->45 10 invscan052021.exe 15 3 2->10         started        process3 dnsIp4 37 127.0.0.1 unknown unknown 10->37 29 C:\Users\user\...\invscan052021.exe.log, ASCII 10->29 dropped 55 Tries to detect virtualization through RDTSC time measurements 10->55 57 Injects a PE file into a foreign processes 10->57 15 invscan052021.exe 10->15         started        file5 signatures6 process7 signatures8 59 Modifies the context of a thread in another process (thread injection) 15->59 61 Maps a DLL or memory area into another process 15->61 63 Sample uses process hollowing technique 15->63 65 Queues an APC in another process (thread injection) 15->65 18 explorer.exe 15->18 injected process9 dnsIp10 31 metropolisgrowlers.com 199.34.228.176, 49765, 80 WEEBLYUS United States 18->31 33 terrasroraima.com 192.185.221.204, 49768, 80 UNIFIEDLAYER-AS-1US United States 18->33 35 15 other IPs or domains 18->35 47 System process connects to network (likely due to code injection or exploit) 18->47 22 msdt.exe 18->22         started        signatures11 process12 signatures13 49 Modifies the context of a thread in another process (thread injection) 22->49 51 Maps a DLL or memory area into another process 22->51 53 Tries to detect virtualization through RDTSC time measurements 22->53 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4b4efdb81c426d5bfcd3ec8f3c34e573a97bf9644bd6524b0e87baa0931775f8/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-05-11 13:47:13 UTC
AV detection:
17 of 29 (58.62%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jnhp3oa4ijwvx7gt5shtynhfoouxx6lejplfesyoq65kbeyxox4a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0cbd5a01e0352396f6e6f7a6162d901dedb50d1e7c80bb0ae88c411b6b0c1365
Formbook
2dc07e970dd5581d1bd22d69e454dceda70d8f87cc84757f86c094b2fdb7f985
Formbook
37a8922f49037f65771bc1e4ab9d7fbb4b1c27ce2bc79fe618705f4d90ad7615
Formbook
719604b516f11740266b2c7a8a61129f779caf4c1f9e16bac35d39f5792a009b
Formbook
94b77677478f890b5f9e0561aebc0f66b1b2fc4494d016e9b5a70ed0ba20980b
Formbook
b2697b1c939e346a4adcf8ed2cb4a0e493f2390a54a0457c95fea5485c2fa19b
Formbook
bf07178f2c85eed5d1e0feafc5c312fce344c6ad7666b5be2abf736e6af94169
Formbook
cf993c713cfe3b22bd4978530f420e2dc54c38d106ad5fc5a9aacb1e377b81e2
Formbook
d8de6668573d3ceb90b6794ad11ce332f7d7ece1d4cc1c40b2279ebcdc71b5dd
Formbook
f3c279e61de77236f3390c91dee09f02aa01974e14e429426fa174e0ff8a7512
Formbook
+ 5'248 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader loader rat
Link:
https://tria.ge/reports/210511-rjfymdq8ex/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.jqjdgw.com/ued5/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4b4efdb81c426d5bfcd3ec8f3c34e573a97bf9644bd6524b0e87baa0931775f8

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

Executable exe 4b4efdb81c426d5bfcd3ec8f3c34e573a97bf9644bd6524b0e87baa0931775f8

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/155121/

Comments