MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 983fe597e0687a206126a3a25d356b3f30431883e692fb1744c7d655b9b6ee59. 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: 17


Intelligence 17 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 983fe597e0687a206126a3a25d356b3f30431883e692fb1744c7d655b9b6ee59
SHA3-384 hash: 0cf492abf8af26b505f30058f9b6a7001edb3b557f1b01d12fab4870028f54d2adff552e2c94c6bb912079bfc4aef394
SHA1 hash: 701d1f39fd047f93543d63fa93b7cdf6ef29d1ee
MD5 hash: 0f558015aea4fab0704f0a81241c95de
humanhash: april-lion-kentucky-red
File name:jetss4321.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:218'868 bytes
First seen:2022-11-02 22:17:43 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 29b61e5a552b3a9bc00953de1c93be41 (174 x Formbook, 82 x AgentTesla, 81 x Loki)
ssdeep 6144:qweEpTH0JdteiykaUKT3CR+AVTCkTgp3c2n7Zp:bD0JWkICEk2ki3c41p
TLSH T18D24122774C1C8BBE2139A30AEB7E7B9F1EC99151850699B13351FF638365C3E212297
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 lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
301
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
jetss4321.exe
Verdict:
Malicious activity
Analysis date:
2022-11-02 22:19:45 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/83c4c84e-f63b-4b60-97fe-8a7443f2213c

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/327386/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a process from a recently created file
Sending a custom TCP request
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Forced system process termination
Setting browser functions hooks
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Unauthorized injection to a browser process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/47582/overview
Behaviour
MalwareBazaar
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6362ec9babf583afa4164690/reports/0152d77a-6d87-4157-b1d5-7dbe98fdfce5/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/274e6768-3c2e-4f82-9533-b48fee75c45b
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1103788
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)
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
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 736449 Sample: jetss4321.exe Startdate: 02/11/2022 Architecture: WINDOWS Score: 100 43 Snort IDS alert for network traffic 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 Antivirus detection for URL or domain 2->47 49 5 other signatures 2->49 9 jetss4321.exe 18 2->9         started        process3 file4 29 C:\Users\user\AppData\Local\...\dddlirbk.exe, PE32 9->29 dropped 12 dddlirbk.exe 9->12         started        15 cmd.exe 1 9->15         started        process5 signatures6 59 Multi AV Scanner detection for dropped file 12->59 61 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 12->61 63 Maps a DLL or memory area into another process 12->63 65 Tries to detect virtualization through RDTSC time measurements 12->65 17 dddlirbk.exe 12->17         started        20 conhost.exe 15->20         started        process7 signatures8 35 Modifies the context of a thread in another process (thread injection) 17->35 37 Maps a DLL or memory area into another process 17->37 39 Sample uses process hollowing technique 17->39 41 Queues an APC in another process (thread injection) 17->41 22 explorer.exe 17->22 injected process9 dnsIp10 31 www.mattress-37684.com 185.53.179.92, 49698, 80 TEAMINTERNET-ASDE Germany 22->31 33 www.xmmdsy.com 38.6.44.32, 49697, 80 COGENT-174US United States 22->33 51 System process connects to network (likely due to code injection or exploit) 22->51 26 WWAHost.exe 22->26         started        signatures11 process12 signatures13 53 Modifies the context of a thread in another process (thread injection) 26->53 55 Maps a DLL or memory area into another process 26->55 57 Tries to detect virtualization through RDTSC time measurements 26->57
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/983fe597e0687a206126a3a25d356b3f30431883e692fb1744c7d655b9b6ee59/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-10-31 12:23:24 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
21 of 25 (84.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ta76lf7anb5cayjguorf2nllh4yegged42jpwf2ey7lflonw5zmq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:je14 rat spyware stealer trojan
Link:
https://tria.ge/reports/221102-17xd7accc8/
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
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Formbook payload
Formbook
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/b4a97396-eed5-4ee1-b000-31a2551a933b
Unpacked files
SH256 hash:
823a68456ee4d5d2f1b0f1aa09f1315f93258abf6f7afcc061759e29597e9fd9
MD5 hash:
a39a8df87966e6758325be25896e9041
SHA1 hash:
78c9b0cb38956c0543b3347cbd049c745e99aeb7
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/6cb7345f-3118-4f71-b493-4e1ccd77f1c2/
Parent samples :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 hash:
aaf6375b6c62ddf0698870f5554368f5a86eb0036be61a67a5c95df7a2be8857
MD5 hash:
ee6a6829a82263265e68b67849eff425
SHA1 hash:
857f679759862943f3a7b71359485d81ccb82465
Link:
https://www.unpac.me/results/6cb7345f-3118-4f71-b493-4e1ccd77f1c2/
SH256 hash:
055af4047ee6bf7232364218e737e324707e76591094bc24da5f036cf3a6ef4b
MD5 hash:
1c39cb1dad7873c6e12ba1fd7b11464d
SHA1 hash:
83d9c2e5811c062ff88e0fe11315f0e89fc9d6cc
Link:
https://www.unpac.me/results/6cb7345f-3118-4f71-b493-4e1ccd77f1c2/
SH256 hash:
983fe597e0687a206126a3a25d356b3f30431883e692fb1744c7d655b9b6ee59
MD5 hash:
0f558015aea4fab0704f0a81241c95de
SHA1 hash:
701d1f39fd047f93543d63fa93b7cdf6ef29d1ee
Link:
https://www.unpac.me/results/6cb7345f-3118-4f71-b493-4e1ccd77f1c2/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/983fe597e068/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.18
Link:
https://yomi.yoroi.company/submissions/983fe597e0687a206126a3a25d356b3f30431883e692fb1744c7d655b9b6ee59

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:meth_get_eip
Create hunting rule
Author:Willi Ballenthin

File information

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

Malspam

Formbook

Executable exe 983fe597e0687a206126a3a25d356b3f30431883e692fb1744c7d655b9b6ee59

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/327386/

Comments