MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8
SHA3-384 hash: 146fe14b62377b3be8112a639f5930dfab9a91009e3720914d935c7acbb25fff7c60910891f38008868cdaa020495608
SHA1 hash: c81ce0925450dfcc48859b6f09752c33aeee1069
MD5 hash: e10df2bf10d820d1354b9f4c7e487da6
humanhash: delta-georgia-december-green
File name:revisión de cuenta de pago_08.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:779'776 bytes
First seen:2025-09-15 09:08:00 UTC
Last seen:2025-10-10 06:33:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:6flxjZm3qXq6+uRPWvHJPs5KXHf5vmfrTYVTtCJcgdvc8WtqgtwVxoq0Oak3:2l4ynRUUI0fgGxc3tEVxj0b
TLSH T173F40242239ADD12D4FA2FF40870D3744779AE9A7821D3079EE57CEB7836B906954383
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 lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
118
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
revisión de cuenta de pago_08.exe
Verdict:
No threats detected
Analysis date:
2025-09-15 09:28:30 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/5aa0f367-46f0-4b7a-8672-6c319b3af0e6

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/27510/
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68c7d799e579c633a4b5585e
Tags:
virus micro msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process from a recently created file
Creating a file
Sending a custom TCP request
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm evasive fingerprint packed vbnet
Link:
https://www.filescan.io/uploads/68c7d86cc62f69962389b950/reports/a68ea2d3-5930-4af0-b196-770795b135da/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-15T03:21:00Z UTC
Last seen:
2025-09-15T03:21:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e0682b02-2363-4113-b974-54b0ce1be6a4
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1777635
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
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)
Sigma detected: Uncommon Userinit Child Process
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)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1777635 Sample: revisi#U00f3n de cuenta de ... Startdate: 15/09/2025 Architecture: WINDOWS Score: 100 28 www.sipsocks.xyz 2->28 30 www.savira.life 2->30 32 3 other IPs or domains 2->32 48 Suricata IDS alerts for network traffic 2->48 50 Multi AV Scanner detection for submitted file 2->50 52 Yara detected FormBook 2->52 56 5 other signatures 2->56 10 revisi#U00f3n de cuenta de pago_08.exe 3 2->10         started        signatures3 54 Performs DNS queries to domains with low reputation 28->54 process4 file5 26 revisi#U00f3n de c... de pago_08.exe.log, ASCII 10->26 dropped 13 revisi#U00f3n de cuenta de pago_08.exe 10->13         started        process6 signatures7 58 Maps a DLL or memory area into another process 13->58 16 jJNtH0dhYBvqUs.exe 13->16 injected process8 process9 18 userinit.exe 13 16->18         started        signatures10 40 Tries to steal Mail credentials (via file / registry access) 18->40 42 Tries to harvest and steal browser information (history, passwords, etc) 18->42 44 Modifies the context of a thread in another process (thread injection) 18->44 46 3 other signatures 18->46 21 cjnJ0ZnzUjg9q.exe 18->21 injected 24 firefox.exe 18->24         started        process11 dnsIp12 34 www.savira.life 203.161.41.106, 49696, 49697, 49698 VNPT-AS-VNVNPTCorpVN Malaysia 21->34 36 www.sipsocks.xyz 99.83.161.153, 49691, 80 AMAZON-02US United States 21->36 38 www.xalurem.click 34.76.205.124, 49692, 49693, 49694 GOOGLEUS United States 21->38
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8/
Threat name:
ByteCode-MSIL.Trojan.DarkCloud
Create hunting rule
Status:
Malicious
First seen:
2025-09-15 06:08:34 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5tbbgchpo75gk44e22wnjphekix3ldfspf6rzdhq4f47lsw7m24a._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
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/250915-k5y71agr31/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/a6f914dd-06e8-4e3c-9943-a001aaabbcc6
Unpacked files
SH256 hash:
ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8
MD5 hash:
e10df2bf10d820d1354b9f4c7e487da6
SHA1 hash:
c81ce0925450dfcc48859b6f09752c33aeee1069
Link:
https://www.unpac.me/results/38f4e215-d78a-4b53-ba3b-c43131546072/
SH256 hash:
1041b538ccbc7d66e59247ef7551cde9b6c282843541585e9190a8e2e3943b12
MD5 hash:
e870d1e8f3791ccc141f85f40fd2972b
SHA1 hash:
150919ee289cffa6feb40ab8261f620dd7e26aac
Link:
https://www.unpac.me/results/38f4e215-d78a-4b53-ba3b-c43131546072/
SH256 hash:
c9ce564a08ba6112427e9d7531ef5e581b06d4bc5988731cbbfc69693f4c7378
MD5 hash:
81f4298642fe75397514da7ebbb26112
SHA1 hash:
65406266981c9b94689e95fa2ed5fcdaf5453e4d
Link:
https://www.unpac.me/results/38f4e215-d78a-4b53-ba3b-c43131546072/
SH256 hash:
972f98f36c02af8b224a79ddd33001a3149580461166dff2050df2cabc374f4d
MD5 hash:
cfb674d632fd547fb69113f3a0a02554
SHA1 hash:
c6bcce98307801c75ab5470d29246301fd11c9d7
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/38f4e215-d78a-4b53-ba3b-c43131546072/
SH256 hash:
df3e019c2efab8cdc3883eb6188bdf07113afff4c156266e978a979d2a0db308
MD5 hash:
d3ad55187e5fceefc2afdb28ccdf8bf0
SHA1 hash:
325e8bf7ebbcc3da06661797335089e4a2cdb9cb
Link:
https://www.unpac.me/results/38f4e215-d78a-4b53-ba3b-c43131546072/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ecc21308ef77/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/ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8

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_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
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
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Malspam

Formbook

Executable exe ecc21308ef77fa657384d6acd4bce4522fb58cb2797d1c8cf0e179f5cadf66b8

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/27510/

Comments