MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4af930a3b1a84b931016014a9a391da8b08857f7bdb26f12461b6dbc057ed88. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c4af930a3b1a84b931016014a9a391da8b08857f7bdb26f12461b6dbc057ed88
SHA3-384 hash: 79e4025b49f60b9b58ef4da70ac9815c398165837018be7a3274dd1d938928f7e128447d2e7ca0c2278f583711d68f48
SHA1 hash: 3770261000e94b62869c51517b0c18d85478081d
MD5 hash: e87e7e4641237313b26775920f786d88
humanhash: video-angel-autumn-ten
File name:zzBNd8MDMBRxemb.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:759'808 bytes
First seen:2022-08-01 10:55:44 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:WH2iNSg6SKlpxSqa9jQpHNKKPt/m/K+prp87vSCx2HQSYYM:K1SLlpxTiWlPtOi+plcLx2FM
TLSH T123F4F192F26D5E9BC4360BF9AC259054177AB39E407CD6086DFAB8EB90323C39152F07
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
286
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/295544/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Launching the process to change network settings
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/62e7b17f6336465f2a00d54f/reports/5033b43f-aa2e-4645-b243-6ababbf3142a/overview
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/bb3a6e6e-1eb7-49ce-b446-c9c8fe62abf5
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1044106
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in 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 domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
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: 676600 Sample: zzBNd8MDMBRxemb.exe Startdate: 01/08/2022 Architecture: WINDOWS Score: 100 32 Multi AV Scanner detection for domain / URL 2->32 34 Malicious sample detected (through community Yara rule) 2->34 36 Antivirus detection for URL or domain 2->36 38 7 other signatures 2->38 10 zzBNd8MDMBRxemb.exe 3 2->10         started        process3 file4 30 C:\Users\user\...\zzBNd8MDMBRxemb.exe.log, ASCII 10->30 dropped 46 Tries to detect virtualization through RDTSC time measurements 10->46 48 Injects a PE file into a foreign processes 10->48 14 zzBNd8MDMBRxemb.exe 10->14         started        signatures5 process6 signatures7 50 Modifies the context of a thread in another process (thread injection) 14->50 52 Maps a DLL or memory area into another process 14->52 54 Sample uses process hollowing technique 14->54 56 Queues an APC in another process (thread injection) 14->56 17 explorer.exe 14->17 injected process8 process9 19 cscript.exe 17->19         started        22 autochk.exe 17->22         started        signatures10 40 Modifies the context of a thread in another process (thread injection) 19->40 42 Maps a DLL or memory area into another process 19->42 44 Tries to detect virtualization through RDTSC time measurements 19->44 24 cmd.exe 1 19->24         started        26 explorer.exe 153 19->26         started        process11 process12 28 conhost.exe 24->28         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c4af930a3b1a84b931016014a9a391da8b08857f7bdb26f12461b6dbc057ed88/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-08-01 10:52:54 UTC
File Type:
PE (.Net Exe)
Extracted files:
14
AV detection:
22 of 25 (88.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ysxzgcr3dkclsmibmakkti4r3kfqrbl7ppnsn4jemg3nxqcx5wea._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:xloader campaign:roz2 loader persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/220801-m1nxksgfgk/
Behaviour
Modifies Internet Explorer settings
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
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Xloader payload
Formbook
Xloader
Unpacked files
SH256 hash:
57ef5c5f01b189bc4ece4ceaeb51e9c8cf0d843726acbea7f780a9a2899ca674
MD5 hash:
4bb2b8d62a55271762abe3f5ffe52894
SHA1 hash:
6ce0a94d2a7974df5198bfa3fc1d799ee35d77b3
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/719edbd3-b4de-4fdf-842b-078a5d0421d6/
Parent samples :
742c0f69fa522736496e540ebe4d36f5bffa7b994485c7a06bb1a557ea06c15d
e210e11f8bed1a04ec9b472f5835081979e144b96d93e5f96c84aadf6012a2b6
a9aa59bed8eb3e4839b215c072549c359c3867b238e65c4bf98a5f274d2808bb
46ffe35598b3c2489b6b2830ac9afe19385161fd055b59863460ea073e562ad3
3ae816aae6ee27d43528398f0dabe972e188c6b005e29a6288ef15c74678ef5c
f1a0d475c350215a9012f33149a8918ce8432f70af12904de606f4a18921bf49
ece69e9d47fc20aee5fb15bed011ddc07042da79d8947c8aa964e72a31c0a463
c4af930a3b1a84b931016014a9a391da8b08857f7bdb26f12461b6dbc057ed88
26c9fd6c55b7c5ed6e8b43a4be26bb74f1b8d043a22aee090f022c65ac3ba858
477ca79c48c0ae888a5da641e5fbabc7d7c8ba7100e77a9b09cc66719360b086
b2f634be000cf32e481c6f66928d8a428a3481f17c7a045a39150bdf9ae6dbe7
19f67f8e8d53e712c27eb18cb84cbdb6e4536a410508360c6d7b0a0571ba48ee
0dc57802ed3d6837fabadc852dd1203a593b166ea46e02e16b5e28dd1a2d91c5
SH256 hash:
d341d76a480667565bed4a7c58f3bb98e8ec8bb0bc5e85a64be6348441382944
MD5 hash:
7d6014c0f890639742004bf21c260056
SHA1 hash:
e7785c9aacc9b283ca2fc11b87f69fd9f8c23233
Link:
https://www.unpac.me/results/719edbd3-b4de-4fdf-842b-078a5d0421d6/
SH256 hash:
39c2d879c57f07305ce60412dc8a88f02e51f1a14a06cc605768d1d7f5313807
MD5 hash:
db51fe170a9e5d6ec5429a2fbd9d0353
SHA1 hash:
e30a58125fc41322db6cf2ccb6a6d414ed379016
Link:
https://www.unpac.me/results/719edbd3-b4de-4fdf-842b-078a5d0421d6/
SH256 hash:
8a64a9cd0c842b6a8dc5e60b9378ff3aa99955473007527ee26de56750d3c3fb
MD5 hash:
fa91a404c082a7e7c0dbc9c1128e76a0
SHA1 hash:
6f7b828b0483378f67e7cfd4ebb0a22b1fbf2a56
Link:
https://www.unpac.me/results/719edbd3-b4de-4fdf-842b-078a5d0421d6/
SH256 hash:
a9c5b2c628a47247402ff05d399855caf6f6a22146d44cd0fd9d7fc05a65ba66
MD5 hash:
228ff1006be83039e4de2b5e0475a5b0
SHA1 hash:
3adef5cc343067fa6b9d5e712114dc619c867a72
Link:
https://www.unpac.me/results/719edbd3-b4de-4fdf-842b-078a5d0421d6/
SH256 hash:
4ee6606be7180c3546ebd087f1033e23d7cc13b83176460c74f54d3a9897c600
MD5 hash:
e5fdeda3f5bb98bd75154c0f4d91c71b
SHA1 hash:
ca6f2f431b79b11d12d7668c89b9e25d176ec61a
Link:
https://www.unpac.me/results/719edbd3-b4de-4fdf-842b-078a5d0421d6/
SH256 hash:
c4af930a3b1a84b931016014a9a391da8b08857f7bdb26f12461b6dbc057ed88
MD5 hash:
e87e7e4641237313b26775920f786d88
SHA1 hash:
3770261000e94b62869c51517b0c18d85478081d
Link:
https://www.unpac.me/results/719edbd3-b4de-4fdf-842b-078a5d0421d6/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c4af930a3b1a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/c4af930a3b1a84b931016014a9a391da8b08857f7bdb26f12461b6dbc057ed88

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 c4af930a3b1a84b931016014a9a391da8b08857f7bdb26f12461b6dbc057ed88

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/295544/

Comments