MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6. 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: 20


Intelligence 20 IOCs YARA 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6
SHA3-384 hash: 301381466c5ea61bb88d4cbae86845300f8857b53bb0e4b696b7241543be808630b44788326c52062a1c58bc9fcdac97
SHA1 hash: 775c9c9f0f462f056a3c4883a03782bcec5c79c6
MD5 hash: 1565669fffcdb8792a2bd603637fbc03
humanhash: massachusetts-bluebird-social-cold
File name:VesselSpecificationDetailspdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'096'192 bytes
First seen:2026-01-17 06:04:17 UTC
Last seen:2026-02-05 15:17:09 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'817 x AgentTesla, 19'738 x Formbook, 12'284 x SnakeKeylogger)
ssdeep 24576:efs9Ce5nasrW3ei/ffS82VMTU+UtxCPrc7vts:2sQWasrWdx2VMwnDo
TLSH T12935F1582709D103CA6597B81EB1F2B8076C6EAAB510E3175FDDBEEBB876F064D40183
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
175
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/c3344f11-0fb1-454e-88b8-4dfdaecf78cd/
Malware family:
formbook
Create hunting rule
ID:
1
File name:
_99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6.exe
Verdict:
Malicious activity
Analysis date:
2026-01-17 06:05:48 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/f1161b49-9117-4ec9-ae2b-e4570466d27d

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/49139/
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=696b2671ef906a21abcde9e9
Tags:
malware
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
explorer krypt lolbin packed
Link:
https://www.filescan.io/uploads/696b266ffdafd7624aaf8438/reports/8980f02f-db25-45f0-8d77-5c9b3d915777/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-17T02:08:00Z UTC
Last seen:
2026-01-19T00:42:00Z UTC
Hits:
~1000
Detections:
Trojan.MSIL.Crypt.sb HEUR:Trojan-PSW.MSIL.Stealer.gen VHO:Trojan-Spy.Win32.Noon.gen Trojan-Spy.Noon.HTTP.ServerRequest PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C Trojan-Spy.Win32.Noon.sb Trojan.MSIL.Inject.sb
Link:
https://opentip.kaspersky.com/99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b0a427a5-afd2-4f0a-bb6f-12c90479d5e9
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1852438
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1852438 Sample: VesselSpecificationDetailspdf.exe Startdate: 17/01/2026 Architecture: WINDOWS Score: 100 38 www.yaliro.xyz 2->38 40 s3.ueyzqqnhdwf.top 2->40 42 8 other IPs or domains 2->42 50 Suricata IDS alerts for network traffic 2->50 52 Multi AV Scanner detection for submitted file 2->52 54 Yara detected FormBook 2->54 58 4 other signatures 2->58 11 VesselSpecificationDetailspdf.exe 4 2->11         started        signatures3 56 Performs DNS queries to domains with low reputation 38->56 process4 file5 34 C:\...\VesselSpecificationDetailspdf.exe.log, ASCII 11->34 dropped 36 C:\Users\user\Desktop\PWB.dll, PE32 11->36 dropped 68 Writes to foreign memory regions 11->68 70 Allocates memory in foreign processes 11->70 72 Injects a PE file into a foreign processes 11->72 15 vbc.exe 11->15         started        18 vbc.exe 11->18         started        signatures6 process7 signatures8 74 Maps a DLL or memory area into another process 15->74 20 n9wwye0JQ.exe 15->20 injected 76 Unusual module load detection (module proxying) 18->76 process9 process10 22 unlodctr.exe 13 20->22         started        signatures11 60 Tries to steal Mail credentials (via file / registry access) 22->60 62 Tries to harvest and steal browser information (history, passwords, etc) 22->62 64 Modifies the context of a thread in another process (thread injection) 22->64 66 4 other signatures 22->66 25 cjG454z9vpIL.exe 22->25 injected 28 chrome.exe 22->28         started        30 firefox.exe 22->30         started        process12 dnsIp13 44 all.365jia.cn.w.kunluncan.com 180.163.146.111, 49725, 49727, 49728 CHINANET-SH-APChinaTelecomGroupCN China 25->44 46 s3.ueyzqqnhdwf.top 43.226.78.180, 49738, 49739, 49740 CHINANET-LIAONING-DALIAN-MANCHINANETLiaoningprovinceDali China 25->46 48 5 other IPs or domains 25->48 32 WerFault.exe 4 28->32         started        process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2026-01-17 05:09:37 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=thtypekkmxusrqbda4gjuau46wgu4qc6jfjlxmiufmoi4u7n7tda._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/260117-gsvghae17e/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Uses the VBS compiler for execution
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/6ebaf673-767a-4340-85cb-9124f2c77096
Unpacked files
SH256 hash:
99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6
MD5 hash:
1565669fffcdb8792a2bd603637fbc03
SHA1 hash:
775c9c9f0f462f056a3c4883a03782bcec5c79c6
Link:
https://www.unpac.me/results/5570713f-195c-49eb-903a-203a175f8e76/
SH256 hash:
fbcde2ecb69607718a5050d907eec249e5ea5161e2923c48186877de894dd0b1
MD5 hash:
3f134cdabfdac8df20826252c69428e3
SHA1 hash:
03d5658a768924e05bee9f45eb18ea6fa54e0596
Link:
https://www.unpac.me/results/5570713f-195c-49eb-903a-203a175f8e76/
SH256 hash:
2094497b3f255e8a87c2b757c2d70211bf9d57409352ccb7bfd396d41d332a93
MD5 hash:
cf4b62421ea5b6cc3c2e98c43cab27b3
SHA1 hash:
a35e74869129abb17e42a8670d71d6f75e6258dc
Link:
https://www.unpac.me/results/5570713f-195c-49eb-903a-203a175f8e76/
SH256 hash:
272d3fc6ef90a172b49765a741e68d495f07d65c5e1507b939e18a6c0bc267ac
MD5 hash:
0cc781a28d6d183b9ab2f6aa4976ae12
SHA1 hash:
fef97522d8787448bdf701eb2ef47bbb54a193b8
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/5570713f-195c-49eb-903a-203a175f8e76/
SH256 hash:
8ba1a75e3a137bdae02c702b55adf4f82a40ae7c6733e8fb1db88fe19f349d44
MD5 hash:
173b8153dd835f3066cc9f70d9d99e2c
SHA1 hash:
62284f24871bc66bcb8335f7bbc3202c54480b8e
Link:
https://www.unpac.me/results/5570713f-195c-49eb-903a-203a175f8e76/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/99e787914a65/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/

File information

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

Malspam

Formbook

Executable exe 99e787914a65e928c023070c9a029cf58d4e405e4952bbb1142b1c8e53edfcc6

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/49139/

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