MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b2253435b6541cf9dc011670f57efd225192942962a40893b53b71114f38899b. 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: 13


Intelligence 13 IOCs YARA 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b2253435b6541cf9dc011670f57efd225192942962a40893b53b71114f38899b
SHA3-384 hash: 2beac9a7426199eb4704e5580d08614367daf1bced945e180209f094bc5dad942c18d41c4817b85403703159e283d1a1
SHA1 hash: 7f5fdbe7f65190b2511eddd8289d77db2cef1cdb
MD5 hash: c3a8b1ba6b720f9534bff5fbc6fb791f
humanhash: monkey-violet-cat-minnesota
File name:c3a8b1ba6b720f9534bff5fbc6fb791f
Download: download sample
Signature Formbook
Create hunting rule
File size:1'211'392 bytes
First seen:2022-01-04 13:57:15 UTC
Last seen:2022-01-04 16:01:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:bvY52kHhdIppu28ZiIqTs+zfa9j6/ySxx4Gj3qtE8Di37/75i5D39DqPtvpbw7pe:bUiBbN/MDcbc6Cn97jKVk5H
TLSH T1A94523039CE41B67CBF743BB089BB1568F3B73915161A60E22743FECEA146492A475CB
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
206
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c3a8b1ba6b720f9534bff5fbc6fb791f
Verdict:
Malicious activity
Analysis date:
2022-01-04 14:01:23 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/5f9ce396-70a5-458f-ac1c-381bcd6258b8

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/217253/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1129.926.9465.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
75%
Tags:
obfuscated
Link:
https://www.filescan.io/uploads/61d4526dbfe53d318f25d4b3/reports/d89a0a27-4885-401b-a8e2-5149bd79c57b/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.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/8c642d49-5d85-49c8-b2e9-fb086802e762
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/915242
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus detection for URL or domain
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
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: 547720 Sample: gzB3K4ki1f Startdate: 04/01/2022 Architecture: WINDOWS Score: 100 28 www.shtfinc.net 2->28 30 www.lehtx.net 2->30 32 2 other IPs or domains 2->32 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for URL or domain 2->50 52 6 other signatures 2->52 9 gzB3K4ki1f.exe 2 2->9         started        signatures3 process4 file5 26 C:\Users\user\AppData\...\gzB3K4ki1f.exe.log, ASCII 9->26 dropped 54 Writes to foreign memory regions 9->54 56 Injects a PE file into a foreign processes 9->56 13 aspnet_regbrowsers.exe 9->13         started        16 conhost.exe 9->16         started        signatures6 process7 signatures8 58 Modifies the context of a thread in another process (thread injection) 13->58 60 Maps a DLL or memory area into another process 13->60 62 Sample uses process hollowing technique 13->62 64 2 other signatures 13->64 18 wlanext.exe 13->18         started        21 explorer.exe 13->21 injected process9 dnsIp10 38 Modifies the context of a thread in another process (thread injection) 18->38 40 Maps a DLL or memory area into another process 18->40 42 Tries to detect virtualization through RDTSC time measurements 18->42 34 www.y-promotion.com 21->34 36 www.fasteang.com 21->36 44 System process connects to network (likely due to code injection or exploit) 21->44 24 autoconv.exe 21->24         started        signatures11 process12
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b2253435b6541cf9dc011670f57efd225192942962a40893b53b71114f38899b/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-01-04 11:28:30 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
21 of 43 (48.84%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wistinnwkqoptxabczypk7x5ejizffbjmksare5vhnyrctzyrgnq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:c8te loader rat suricata
Link:
https://tria.ge/reports/220104-q9t2qsahep/
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 WriteProcessMemory
Suspicious use of SetThreadContext
Blocklisted process makes network request
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
57b3486a659f2b6e7d91e454a59116f2184468dda3c8b4f34213e6c98a0d2f80
MD5 hash:
dc2c61e522f0929d52da32c96ecc32a0
SHA1 hash:
c36603ae44d3cd06f20ceb18d29955cf70a78dc6
Link:
https://www.unpac.me/results/ef9f08dd-7c25-41a8-9054-09b100e6ca9e/
SH256 hash:
b8bab6150dacb77a10a74fe6d16b59ad725a26ade94937a5c2b5a7decf9fec21
MD5 hash:
f6e5afc08de41620b17402e6f9b9c3d0
SHA1 hash:
a395f6e5616ea1e5956766abffea7f4aa02961f8
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/ef9f08dd-7c25-41a8-9054-09b100e6ca9e/
Parent samples :
399d8e9277b5f66e82967946935e260029d9920532a649c8cca7e637ef34e2f4
b2253435b6541cf9dc011670f57efd225192942962a40893b53b71114f38899b
702d3030838e32a3a304f2765eea7f2a0dcf256890ee1614afd6508c3035d842
75e51d5e7662ad2c7ee23822ebf5246ce2d3257734ef87883f57bbcffe13c5d2
ff7bd7299367f7e43c9c44fcd0f47a2a7f5b0529046b74ff6dc9c23c4bc71e86
SH256 hash:
b2253435b6541cf9dc011670f57efd225192942962a40893b53b71114f38899b
MD5 hash:
c3a8b1ba6b720f9534bff5fbc6fb791f
SHA1 hash:
7f5fdbe7f65190b2511eddd8289d77db2cef1cdb
Link:
https://www.unpac.me/results/ef9f08dd-7c25-41a8-9054-09b100e6ca9e/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.51
Link:
https://yomi.yoroi.company/submissions/b2253435b6541cf9dc011670f57efd225192942962a40893b53b71114f38899b

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
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.

Web download

Formbook

Executable exe b2253435b6541cf9dc011670f57efd225192942962a40893b53b71114f38899b

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1948658/
Cape
Cape
https://www.capesandbox.com/analysis/217253/

Comments


Avatar
zbet commented on 2022-01-04 13:57:17 UTC

url : hxxp://103.133.109.181/ny9999777_3/vbc.exe