MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da
SHA3-384 hash: cd6954dc659a8cdfc21b6a405d1329a9f33f39c11bbd5ad844557fc8b56c3630089c1fa9bd5bb2de090e65caa3cda3a4
SHA1 hash: 2cc8eceb51970397f12eddb43a0882c401f5a933
MD5 hash: 1f8130399cdad49a0a7e1ac0ba43ad9e
humanhash: skylark-aspen-venus-leopard
File name:e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da
Download: download sample
Signature Formbook
Create hunting rule
File size:758'272 bytes
First seen:2025-12-08 14:53:54 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:ZpcdkLC2R2IS31V+sf95FAnOAoSJHhCEAQP3IoWEbWLE9QvN45pLf/1P1s:Zpcd8ZRK31sOdAnusHsE7MWQvW7LTs
Threatray 2'224 similar samples on MalwareBazaar
TLSH T17BF40100676EDF06E0FA1FF46A71D1B007B5BE99A825C70A8FD22EDB74B5B001A51753
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 adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
65
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
FormBook RoboSki
Details
FormBook
a decrypted component and its RC4 key
RoboSki
a Base64 + XOR/Sub-decrypted component, its associated key, a mutex, a filename, and ReZer0 configuration parameters including: a load type, a download URL and filename (if configured), an interval (if configured), and varying flags
RoboSki
an extracted ReZer0 payload
Link:
https://research.acce.ciphertechsolutions.com/results/d669f932-37ca-4b55-a4f8-4304a76d8be3/
Malware family:
n/a
ID:
1
File name:
e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da
Verdict:
No threats detected
Analysis date:
2025-12-08 18:50:10 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/7c1683de-cd29-46e4-91b1-1ee9971f9f40

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/43228/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6936e6ad881313558a2b88b3
Tags:
virus shell msil
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-13T03:38:00Z UTC
Last seen:
2025-12-10T11:46:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/fffbfaf0-1a9f-44c0-81ef-d9cbef995903
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.37 Win 32 Exe x86
Link:
https://app.malva.re/file/1f8130399cdad49a0a7e1ac0ba43ad9e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-11-13 09:11:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
11
AV detection:
24 of 36 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=4kf5gbxxbd5hhczzbcyjxxhxwyd6usisdtr3yhq4pmoldmcyqdna._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
Similar samples:
220508aa28bcd902b7513ee7187ffc10487ecae6e77d9446f17216473fc5fb61
Formbook
2fb4fd8f482e50ae5fb82247c94247c33ff6d60224d293ac98a568b819959965
Formbook
301700358a42c5d078221f9d13d483ad9d1498eaa3dc547ff3aec4c41237f97e
Formbook
71913c4e7f11b3edef83eda30581ef8a81a8a324efc733498dc886210658ba60
Formbook
79735be3c8426addcde6d4ed23d66cf6afd56f5aee015d806342fbf47259b55e
Formbook
7be16d08f76a1f88d6ff634df15d045d532e8a7b67827e21f4c7d71f37f3718b
Formbook
8dfa6515ab3df482f4c286932feec38420e606c8bb42e2055f4361db4fc638b9
Formbook
8ec0ad44c95b1b7190a2fcae723d0189bc0c814e08244b974c0e9fe51b19bd03
Formbook
bce46d675d57b09b2bf85f109ab3cdd12c7894519b8ba37426601dd18eb03671
Formbook
e33cb23b65d7b1b744b2e12f438cf192f2c58431a4e7f42c7c99899dbaf06dad
Formbook
error
Formbook
+ 2'214 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/251208-r943dadl4w/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c5595540-8f74-4fb1-932d-5a26fd2d746a
Unpacked files
SH256 hash:
4755144f82a4a3fa80f43be3df88153647eb21497ca3dc4f025a1153053decc2
MD5 hash:
39274f692cae5cf33932f90258e4ad98
SHA1 hash:
054a3ecaf8abe838fe52a229bbba1a2755456653
Link:
https://www.unpac.me/results/09f905b0-1f53-4eb6-9be9-544200efc7af/
SH256 hash:
b23b1cbc9307d22f064b6b82a258e316863b6a6793528705ba9e9789ca534e39
MD5 hash:
8277b03f43a2d15e5e1621556acdabcc
SHA1 hash:
73ea129498ee684797d56d727a714d4a6a9b31f2
Link:
https://www.unpac.me/results/09f905b0-1f53-4eb6-9be9-544200efc7af/
SH256 hash:
aafd8e776a1eea0fc546035f663dd29e5393b33b6c32db18f7bdb5f42163da5f
MD5 hash:
6ee2698283dd56a5892adde71f4b5c2f
SHA1 hash:
b729979f4a4b2c6e25b25d96fb5457d5108db231
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/09f905b0-1f53-4eb6-9be9-544200efc7af/
SH256 hash:
ae9e767716c6895a278ae4f10074ad13b37b8555becc47473593912b5e74e418
MD5 hash:
9790dff7c764731d58298f832f4ee7a6
SHA1 hash:
37be16b575ab689dc0e60daa967e52396a2e563a
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/09f905b0-1f53-4eb6-9be9-544200efc7af/
Parent samples :
e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da
a8232f613ab4733a622ce014534cddab4845db7bb66ddc38c4ef9632ddc2cf85
301700358a42c5d078221f9d13d483ad9d1498eaa3dc547ff3aec4c41237f97e
e642d44bf84bea123ad9ba74f959e7ed372e0a7fa90f73ff123893b6ce1253c6
fc500e76a991eda568ba5ea924902b8d9eb35648200ce41bce7a01f4a3c817e7
2f8315de575da924de5e72a06c9cf1957b00db3c471316ce5e4bc159cd91c0e7
017e7ffa9bf29a7e34f49af01e5773c80956c08d92b9a05e2f8511ba3c7e19a6
6cb3e715d3c9fd5e25932ce3d9c62fb2cd71ca4228a06db75943032a329120d0
d2610184549c14fb37bc2be6a3df16208dc72800a20ae1508beccc4b895bf4e1
c6f69daf510c0bf05f45c8ef6e8ad79bb533fed15e4a1d5deef8b2dfea3708c9
a14eaa9515d8c813ed19729380e8153e776cacf742549290afacdc4bfcf83306
a7db6df5960231b52632b929d91f56f275347d1af9b18326d1ebbf575eb5f2ba
SH256 hash:
e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da
MD5 hash:
1f8130399cdad49a0a7e1ac0ba43ad9e
SHA1 hash:
2cc8eceb51970397f12eddb43a0882c401f5a933
Link:
https://www.unpac.me/results/09f905b0-1f53-4eb6-9be9-544200efc7af/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/e28bd306f708/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/e28bd306f708fa738b3908b09bdcf7b607ea49121ce3bc1e1c7b1cb1b05880da

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: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.

Cape
Cape
https://www.capesandbox.com/analysis/43228/

Comments