MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87. 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: 18

Intelligence 18 IOCs YARA 17 File information Comments

SHA256 hash:	48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87
SHA3-384 hash:	9c402911e4f75c4aa9aefc8991cce76d769fb60f35c5b858b631639ca4dd4ebdc02b83c5355d4d75b4882d6ef3371c9b
SHA1 hash:	e0ec8cb5b4d95ac9e2576a8d17b24a6a923d385f
MD5 hash:	0484380429dab2529d7aefd1341b27ee
humanhash:	south-papa-alanine-florida
File name:	Dekont.pdf.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	2'306'048 bytes
First seen:	2024-04-15 13:07:35 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	49152:/cftm1uw9GCzlZJ/o3IZ7bjH+oLDlbwswl5Xhj1eyh5/:/SmFBlPHJ/XL5ajB9h
Threatray	4'026 similar samples on MalwareBazaar
TLSH	T1B6B533596DC1476DD3D9C772BC4A2AFA0356EF2BA221D71F854C15224C04BE3723ABA3
TrID	67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.7% (.EXE) Win64 Executable (generic) (10523/12/4) 6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Reporter	lowmal3
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

304

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87.exe

Verdict:

Malicious activity

Analysis date:

2024-04-15 13:14:32 UTC

Tags:

evasion agenttesla stealer

Link:

https://app.any.run/tasks/be5925ed-d8f3-4aff-8baa-1e30dcc88c79

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a process with a hidden window

Creating a file

Using the Windows Management Instrumentation requests

Launching a process

Moving a file to the Program Files subdirectory

Replacing files

Сreating synchronization primitives

DNS request

Connection attempt

Sending an HTTP GET request

Reading critical registry keys

Forced system process termination

Sending a custom TCP request

Creating a window

Stealing user critical data

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

masquerade obfuscated packed packed smartassembly smart_assembly

Link:

https://www.filescan.io/uploads/661d26b5d0e2a012b423a502/reports/493b869e-0759-4978-857e-527dba89e6bd/overview

Verdict:

Malicious

Labled as:

MSIL.Mensa.Generic

Link:

https://www.hybrid-analysis.com/sample/48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Malware family:

Agent Tesla

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/365b4d8e-2801-40db-8bf8-230c25c1a29a

Result

Threat name:

AgentTesla, PureLog Stealer

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1426088

Signature

.NET source code contains potential unpacker

Antivirus / Scanner detection for submitted sample

Check if machine is in data center or colocation facility

Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)

Contains functionality to log keystrokes (.Net Source)

Found malware configuration

Initial sample is a PE file and has a suspicious name

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)

Sigma detected: Suspicious Double Extension File Execution

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Tries to harvest and steal browser information (history, passwords, etc)

Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)

Tries to steal Mail credentials (via file / registry access)

Uses an obfuscated file name to hide its real file extension (double extension)

Yara detected AgentTesla

Yara detected AntiVM3

Yara detected Costura Assembly Loader

Yara detected Generic Downloader

Yara detected PureLog Stealer

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87/

Threat name:

ByteCode-MSIL.Trojan.Mensa

Status:

Malicious

First seen:

2024-04-15 13:08:07 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

17 of 38 (44.74%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=jdrh4bo2e2lxkhcn42unluzptxrqyw7in7k4ejrwet3l4hrfvsdq._file

Verdict:

malicious

Label(s):

agenttesla_v4

agenttesla

Formbook

2f7ca180c50ce99d164b5601826e648f88d6db9b932b052dfea9d59a7e2b78ed

Formbook

48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87

Formbook

b9ed438f763584171822b73a28273427a0923cca26b8e40b008e3aefbcf48d79

Formbook

e38df18adfde3e7ad19894dad9579c0ada18bfbddcb56846a043c4cfb811ec40

Formbook

+ 4'016 additional samples on MalwareBazaar

Result

Malware family:

zgrat

Score:

10/10

Tags:

family:agenttesla family:zgrat keylogger rat spyware stealer trojan

Link:

https://tria.ge/reports/240415-qc774ahd41/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Looks up external IP address via web service

Reads user/profile data of web browsers

Reads WinSCP keys stored on the system

Reads data files stored by FTP clients

Reads user/profile data of local email clients

AgentTesla

Detect ZGRat V1

ZGRat

Unpacked files

SH256 hash:

70a3950fcc93a62ff3478bad74e7d902a6464bcfa753d345d446ad7f5afce017

MD5 hash:

fb841256fdbdc63979745f27beac7429

SHA1 hash:

f2ce899c378bf64ed6c1c043749b032ddd2547fd

Link:

https://www.unpac.me/results/05e0f040-dd11-467c-a177-e2fd95797d37/

SH256 hash:

736b145ed79153214b339f9ee3ce9a4dc8a4b861f52e9ffd71a2c393fbf0947d

MD5 hash:

a4da6bf592d5e831c3b491062f9af6ad

SHA1 hash:

b2bc477b3e0ed1b86b9df285194a9165017cf8d6

Link:

https://www.unpac.me/results/05e0f040-dd11-467c-a177-e2fd95797d37/

SH256 hash:

410c191dfc94b64df404070d4df9b162f71450378d7c5d24d9e7ce64ba127e88

MD5 hash:

98c528032fcb600b2d1a428a906ff51f

SHA1 hash:

a2d0aaa1d1563d7990ae0338e0ef66c601d38dcc

Link:

https://www.unpac.me/results/05e0f040-dd11-467c-a177-e2fd95797d37/

SH256 hash:

bb0dd008cb087f0823ffc3677ed4cab4de4e02140d9035f6430377dc8ece6393

MD5 hash:

2067c13fdfaea453dfceee96e601be66

SHA1 hash:

75af23a941a6c024dc0385852070400eb347394a

Detections:

AgentTesla

win_agent_tesla_g2

INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients

Agenttesla_type2

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID

INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients

INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

INDICATOR_EXE_Packed_GEN01

INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

Link:

https://www.unpac.me/results/05e0f040-dd11-467c-a177-e2fd95797d37/

Parent samples :

e38df18adfde3e7ad19894dad9579c0ada18bfbddcb56846a043c4cfb811ec40
0764ec132ebf90d1c59dfe6bc19d492b1e0034f3021f466c63231be4413bc1e6
2f7ca180c50ce99d164b5601826e648f88d6db9b932b052dfea9d59a7e2b78ed
48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87
12d4a1c97873ee94b9b371666debc07aea1fd56d8afda6d023d2426bc54f6e34
f80e5f58eaad73e902c8d612e166c360a309e4093bd7fa3451df4495638a73e4

SH256 hash:

965e4c8d7f79045aa9206d7ca32e5ec5afc4c093e80310a556defe889326a1f8

MD5 hash:

439e0e8178224f8fbc6011e6048f5ba3

SHA1 hash:

0ea7f19619c25810fd558cc32e755f22812a27ce

Link:

https://www.unpac.me/results/05e0f040-dd11-467c-a177-e2fd95797d37/

SH256 hash:

48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87

MD5 hash:

0484380429dab2529d7aefd1341b27ee

SHA1 hash:

e0ec8cb5b4d95ac9e2576a8d17b24a6a923d385f

Detections:

INDICATOR_EXE_Packed_SmartAssembly

Link:

https://www.unpac.me/results/05e0f040-dd11-467c-a177-e2fd95797d37/

Malware family:

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/48e27e05da26/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Formbook

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87

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:	AgentTeslaV3 Create hunting rule
Author:	ditekshen
Description:	AgentTeslaV3 infostealer payload

Rule name:	AgentTeslaV5 Create hunting rule
Author:	ClaudioWayne
Description:	AgentTeslaV5 infostealer payload

Rule name:	DebuggerCheck__RemoteAPI Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	INDICATOR_EXE_Packed_GEN01 Create hunting rule
Author:	ditekSHen
Description:	Detect packed .NET executables. Mostly AgentTeslaV4.

Rule name:	INDICATOR_EXE_Packed_SmartAssembly Create hunting rule
Author:	ditekSHen
Description:	Detects executables packed with SmartAssembly

Rule name:	INDICATOR_SUSPICIOUS_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many email and collaboration clients. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many file transfer clients. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL Create hunting rule
Author:	ditekSHen
Description:	Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

Rule name:	INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing Windows vault credential objects. Observed in infostealers

Rule name:	malware_Agenttesla_type2 Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Agenttesla in memory
Reference:	internal research

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:	Windows_Trojan_AgentTesla_ebf431a8 Create hunting rule
Author:	Elastic Security
Reference:	https://www.elastic.co/security-labs/attack-chain-leads-to-xworm-and-agenttesla

File information

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

Malspam

Formbook

exe 48e27e05da2697751c4de6a8d5d32f9de30c5be86fd5c2263624f6be1e25ac87

(this sample)

Delivery method

Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (GUARD_CF)	high

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