MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6. 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: 15


Intelligence 15 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6
SHA3-384 hash: 47dfa629c0ee6563bdc1e6eeb1f263d34f43c881b0893b25db7a400cff8bc2dee15defc22f4484f3cd8e244eb692f6dd
SHA1 hash: b310dc98ee5903eac07d6d003469a3f7caa36a13
MD5 hash: 5d00dde458c1a1334db921b6a19d305d
humanhash: carbon-virginia-yankee-four
File name:msedge_elf.dll
Download: download sample
Signature Formbook
Create hunting rule
File size:1'773'568 bytes
First seen:2025-12-21 05:05:53 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash d3774c8b4fb397ae74273ae43189678d (2 x Formbook)
ssdeep 49152:Qrh9c3z0vPp4Gf3hClz7L/vfAtc+Y5WWQYBjG:+c3zQpWn8/bYs
Threatray 2'502 similar samples on MalwareBazaar
TLSH T11A859D09E3D40978D56B9374CA6B9732D6B1F8414731C68F42A6DA4E2F33BD09A3B721
TrID 48.7% (.EXE) Win64 Executable (generic) (10522/11/4)
23.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
9.3% (.EXE) OS/2 Executable (generic) (2029/13)
9.2% (.EXE) Generic Win/DOS Executable (2002/3)
9.2% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
127
Origin country :
CH CH
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
msedge_elf.dll
Verdict:
No threats detected
Analysis date:
2025-12-21 05:07:42 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/12fb3be2-83a5-4839-aba9-bb5b1443ae43

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/45635/
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69478052a6c88bb4cc232861
Tags:
virus
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
adaptive-context anti-debug masquerade microsoft_visual_cc packed
Link:
https://www.filescan.io/uploads/6947804f3f8fdbf8e94d57b0/reports/94a39d6a-f7bc-4116-8f76-0931218df2b2/overview
Verdict:
Malicious
Labled as:
W64/Agent.LPL.gen
Link:
https://www.hybrid-analysis.com/sample/cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6
Verdict:
Malicious
File Type:
dll x64
First seen:
2025-12-21T01:29:00Z UTC
Last seen:
2025-12-23T03:17:00Z UTC
Hits:
~10000
Detections:
Trojan-Spy.Win32.Noon.bpah Trojan.Win32.Inject.sb PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C VHO:Trojan.Win32.Inject.gen VHO:Backdoor.Win32.Agent.gen Trojan-Spy.Win32.Noon.sb Trojan-Spy.Noon.HTTP.ServerRequest Trojan.Win32.Injector.sb
Link:
https://opentip.kaspersky.com/cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6/results?tab=lookup
Malware family:
Rhadamanthys
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/f901b858-e516-4c4a-aa1a-87bf31612917
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1836891
Signature
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
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1836891 Sample: msedge_elf.dll.exe Startdate: 21/12/2025 Architecture: WINDOWS Score: 88 55 www.kickersketch.com 2->55 57 kickersketch.com 2->57 59 www.taxattorneyreno.com 2->59 61 Suricata IDS alerts for network traffic 2->61 63 Multi AV Scanner detection for submitted file 2->63 65 Yara detected FormBook 2->65 67 Joe Sandbox ML detected suspicious sample 2->67 11 loaddll64.exe 1 2->11         started        signatures3 process4 process5 13 rundll32.exe 11->13         started        16 cmd.exe 1 11->16         started        18 rundll32.exe 11->18         started        20 19 other processes 11->20 signatures6 81 Writes to foreign memory regions 13->81 83 Allocates memory in foreign processes 13->83 85 Injects a PE file into a foreign processes 13->85 22 ngen.exe 13->22         started        25 rundll32.exe 16->25         started        27 ngen.exe 18->27         started        29 ngen.exe 20->29         started        31 ngen.exe 20->31         started        33 ngen.exe 20->33         started        35 2 other processes 20->35 process7 signatures8 69 Maps a DLL or memory area into another process 22->69 71 Unusual module load detection (module proxying) 22->71 37 wadAlsQQL4n3ij.exe 22->37 injected 73 Writes to foreign memory regions 25->73 75 Allocates memory in foreign processes 25->75 77 Injects a PE file into a foreign processes 25->77 39 ngen.exe 25->39         started        42 PIvYUnjUq.exe 27->42 injected 44 tgi7Mvl8TCN4.exe 29->44 injected process9 signatures10 46 msra.exe 37->46         started        79 Maps a DLL or memory area into another process 39->79 49 2Zvf05Y9QN.exe 39->49 injected 51 msra.exe 42->51         started        process11 signatures12 87 Unusual module load detection (module proxying) 46->87 53 msra.exe 49->53         started        process13
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/5d00dde458c1a1334db921b6a19d305d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6
Threat name:
Win64.Packed.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-12-21 05:06:23 UTC
File Type:
PE+ (Dll)
AV detection:
13 of 36 (36.11%)
Threat level:
  1/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zxwlc6dgvkk24fyxic5e7snxhmhxu5poqfyrt67eeoyhjqwd5cta._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0d2d887adcdf6309c4532e75ddb508db33402c7a488c3e2b8943c6721dab6708
Formbook
ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6
Formbook
c1e794bdbcff776a99aba24a19ebc1afcaa8425826472c2d0e3e49b59f820aaa
Formbook
cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6
Formbook
error
Formbook
f98c2c567f36a0d6f93d0727d1635ae56ff00987ed1090c9783104bc99b77654
Formbook
fec34000664e9453638769da3413cddb271e791cbc5f8fb9c7697aeec8133f33
Formbook
+ 2'492 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://tria.ge/reports/251223-n3deaswpdx/
Behaviour
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/75f6fe14-6a7d-4410-93ad-cc4c452b2a2b
Unpacked files
SH256 hash:
cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6
MD5 hash:
5d00dde458c1a1334db921b6a19d305d
SHA1 hash:
b310dc98ee5903eac07d6d003469a3f7caa36a13
Link:
https://www.unpac.me/results/b4019b2c-2877-4d18-a5a4-c4fdcc95d689/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/cdecb17866aa/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/cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6

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__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
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_detect_tls_callbacks
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:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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 cdecb17866aa95ae171740ba4fc9b73b0f7a75ee817119fbe423b074c2c3e8a6

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/45635/

Comments