MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20
SHA3-384 hash: 1e8260e3a4867fabeb89925dc8e5d0c8eceae35ffae6363c9b1fe195a8f8fdb3fab4668b5d8801746780d8b17fc303fa
SHA1 hash: 66cba1358e043e5a61816720e59c68d741579074
MD5 hash: 1718e57bc567efa169611f4dceab3a07
humanhash: princess-lion-lion-cold
File name:M.T.CELSIUS GREENLAND APPOINTMENT LETTER.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'040'896 bytes
First seen:2026-05-21 11:07:47 UTC
Last seen:2026-06-08 08:27:50 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'066 x AgentTesla, 20'011 x Formbook, 12'352 x SnakeKeylogger)
ssdeep 24576:2hwZt6yDG+hRfKQjYIi0rr85/b2bmdTR1f:Swqyi+vKQjf8tEmRR1
Threatray 2'807 similar samples on MalwareBazaar
TLSH T193251210631AD917D8A61FF44932D2F017F18EC8A925D307AFEA3EEFB4783255566283
TrID 73.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.6% (.EXE) Win64 Executable (generic) (6522/11/2)
4.5% (.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 :
154
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/f1a1636a-41c1-434e-88d6-fb135e283b08/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
No threats detected
Analysis date:
2026-05-21 11:09:27 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/210fd711-3dc1-4f05-8d89-c2dd0d7af16f

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/67162/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.3247.14068.32309.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a0ee7c04f2b29ce04029252
Tags:
micro spawn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Sending a custom TCP request
Creating a file
Сreating synchronization primitives
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
packed vbnet
Link:
https://www.filescan.io/uploads/6a0ee7b4efbd399b39c262d0/reports/2b7350f2-a88e-4a73-b4f1-fae899afeba4/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-05-21T07:42:00Z UTC
Last seen:
2026-05-23T09:03:00Z UTC
Hits:
~1000
Detections:
HEUR:Trojan-PSW.MSIL.Agensla.gen Trojan.MSIL.Inject.sb Trojan.MSIL.Crypt.sb Trojan-Spy.Win32.Noon.sb
Link:
https://opentip.kaspersky.com/a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20/results?tab=lookup
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e1fb52f4-0e9c-45cf-a2a4-88f479236bca
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1917049
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
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
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)
Yara detected AntiVM3
Yara detected FormBook
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1917049 Sample: M.T.CELSIUS GREENLAND APPOI... Startdate: 21/05/2026 Architecture: WINDOWS Score: 100 34 www.femmesalon.shop 2->34 36 www.deva-horeca.online 2->36 38 18 other IPs or domains 2->38 46 Suricata IDS alerts for network traffic 2->46 48 Antivirus detection for URL or domain 2->48 50 Multi AV Scanner detection for submitted file 2->50 52 6 other signatures 2->52 11 M.T.CELSIUS GREENLAND APPOINTMENT LETTER.exe 3 2->11         started        signatures3 process4 file5 32 M.T.CELSIUS GREENL...MENT LETTER.exe.log, ASCII 11->32 dropped 62 Injects a PE file into a foreign processes 11->62 15 M.T.CELSIUS GREENLAND APPOINTMENT LETTER.exe 11->15         started        signatures6 process7 signatures8 64 Maps a DLL or memory area into another process 15->64 18 bE71oM6BxKK7.exe 15->18 injected process9 process10 20 takeown.exe 13 18->20         started        signatures11 54 Tries to steal Mail credentials (via file / registry access) 20->54 56 Tries to harvest and steal browser information (history, passwords, etc) 20->56 58 Modifies the context of a thread in another process (thread injection) 20->58 60 4 other signatures 20->60 23 lfDLnQ1daoeR1.exe 20->23 injected 26 chrome.exe 20->26         started        28 firefox.exe 20->28         started        process12 dnsIp13 40 onstatic-pt.setupdns.net 81.88.57.70, 49741, 49742, 49743 REGISTER-ASIT Italy 23->40 42 www.femmesalon.shop 172.67.205.60, 49781, 80 CLOUDFLARENET-CloudflareIncUS Canada 23->42 44 12 other IPs or domains 23->44 30 WerFault.exe 4 26->30         started        process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20
Threat name:
Win32.Trojan.Xworm
Create hunting rule
Status:
Malicious
First seen:
2026-05-21 10:47:31 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=u3g5y5uhkzw45xpffllwt65vtd7s6qcons25pkxomwxlefkazmqa._file
Verdict:
malicious
Label(s):
zgrat
Create hunting rule
formbook
Create hunting rule
Similar samples:
0e9815093b48958e642ad4bf4806a0fbb84cd1350e7d67d9c60aaa0c145e6302
Formbook
18d7464b635f059c8792b3b2fb572ab348b9fca133ab0564fcde1a3d7beb1bba
Formbook
680c3a1fe5c2fe5a84ae9d575f1ef6f4a28dec59090a4018363e58635536e07a
Formbook
802fadcbeefc3795c90d0b0e0f5c38feba3a86334b6f33a8d024330ecae010e0
Formbook
be1f829c0a12b713df49c8a8cf8dd1bca669b975b7ba147a9991d4ecb8d5a8cb
Formbook
c61fd6a91353834b1b35bdef04242f89295b7f7ecffb2951ec3459b391d8ed97
Formbook
cb70357549841be383d38d9c155e6cb95b46c1711f7e67c8a2274d1166a3a538
Formbook
cdb4f964fdb6348bd4e59b47cbd43a15bb41acac2098e41dc397f055147713c8
Formbook
error
Formbook
+ 2'797 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/260521-m8v1vsdt4w/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20
MD5 hash:
1718e57bc567efa169611f4dceab3a07
SHA1 hash:
66cba1358e043e5a61816720e59c68d741579074
Link:
https://www.unpac.me/results/3025cf47-4c58-47b7-b1d0-5d2ee252be9a/
SH256 hash:
1b7bc097c92735446793117427eb63e581aa3ea6982a75ec872cd27fbe2e9b5e
MD5 hash:
d3149fbfe65d3da08baca186a70bbcc7
SHA1 hash:
63a1460c9356fbda25d63119693c43d69637796f
Link:
https://www.unpac.me/results/3025cf47-4c58-47b7-b1d0-5d2ee252be9a/
SH256 hash:
30b8da6a6c14adb7188e67f556e4e4abdc4e0a47db4008b7a2930c21dbdf59c2
MD5 hash:
c25420b73d0fe1dd63cf91b94c810225
SHA1 hash:
8d54643580d5d5952e74ec53ebf93b91e398e9de
Link:
https://www.unpac.me/results/3025cf47-4c58-47b7-b1d0-5d2ee252be9a/
SH256 hash:
ca4d640a4d231ef8bc252d39d71c5f2a0ccb88f23fe51a48cd2cca9fc9b1fa38
MD5 hash:
0325ff119d23d0f6db74216f49ce0a46
SHA1 hash:
f8f9dcaf1eb804e2813f4732222d51e37f04b984
Link:
https://www.unpac.me/results/3025cf47-4c58-47b7-b1d0-5d2ee252be9a/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a6cddc768756/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
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 a6cddc7687566dcedde52ad769fbb598ff2f404e6cb5d7aaee65aeb21540cb20

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/67162/

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