MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553. 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 21 File information Comments

SHA256 hash:	1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553
SHA3-384 hash:	701761fda6831344227a061a948f769cf30e4075224832ad23ea8c0742f4babf69b2562d18bfe6f507693f4725dac0c4
SHA1 hash:	d338c52ed282073123a3b86d73bd80305b12881c
MD5 hash:	b109c492de97f6b371df3b89bec1f871
humanhash:	august-shade-solar-nuts
File name:	PO_202405014.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	766'472 bytes
First seen:	2024-05-14 06:02:18 UTC
Last seen:	2024-05-14 06:28:38 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'750 x AgentTesla, 19'653 x Formbook, 12'248 x SnakeKeylogger)
ssdeep	12288:IHYMjhvPie/rByY7777777777777k+Al8UFJQzFvWtZY1pMBtT9rlMa8Rma6oiJw:IHYMFniyyj+AJFeROJBtT9psma6oiJrU
TLSH	T123F4021032385953E37ED6F502A2A5335BF01EABA570EBC81CCE2CCA3AEE7D45114697
TrID	63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 11.2% (.SCR) Windows screen saver (13097/50/3) 9.0% (.EXE) Win64 Executable (generic) (10523/12/4) 5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 3.8% (.EXE) Win32 Executable (generic) (4504/4/1)
File icon (PE):
dhash icon	98186169696b338a (6 x AgentTesla, 5 x Formbook, 1 x RemcosRAT)
Reporter	lowmal3
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

333

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553.exe

Verdict:

Malicious activity

Analysis date:

2024-05-14 06:04:58 UTC

Tags:

evasion smtp exfiltration stealer agenttesla

Link:

https://app.any.run/tasks/1042e0c6-011f-412a-be8a-8db76b8c16d2

Note:

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

Detection(s):

SecuriteInfo.com.Win32.PWSX-gen.29096.10615.UNOFFICIAL

Gathering data

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Using the Windows Management Instrumentation requests

Сreating synchronization primitives

DNS request

Connection attempt

Sending a custom TCP request

Sending an HTTP GET request

Reading critical registry keys

Setting a keyboard event handler

Stealing user critical data

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

overlay packed

Link:

https://www.filescan.io/uploads/6642fe96f55673e065ae20b7/reports/c41278c9-a882-4ec0-bbe9-f8b9dc4e8134/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553

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/5acec8ec-54f9-4b04-8bfa-ee1794675a8a

Result

Threat name:

AgentTesla, PureLog Stealer

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1441013

Signature

.NET source code contains method to dynamically call methods (often used by packers)

.NET source code contains potential unpacker

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)

Contains functionality to register a low level keyboard hook

Found malware configuration

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

Installs a global keyboard hook

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

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

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 steal Mail credentials (via file / registry access)

Yara detected AgentTesla

Yara detected AntiVM3

Yara detected Generic Downloader

Yara detected PureLog Stealer

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553/

Threat name:

ByteCode-MSIL.Trojan.AgentTesla

Status:

Malicious

First seen:

2024-05-14 04:16:39 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

18 of 23 (78.26%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=ce43uzrvrch4wx56tigf6r7fjzlbzh22wsc75dxmawuhckznyvjq._file

Verdict:

malicious

Label(s):

agenttesla_v4

agenttesla

Result

Malware family:

agenttesla

Score:

10/10

Tags:

family:agenttesla keylogger spyware stealer trojan

Link:

https://tria.ge/reports/240514-gr1l5adb5s/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Looks up external IP address via web service

Reads user/profile data of local email clients

Reads user/profile data of web browsers

AgentTesla

Unpacked files

SH256 hash:

e65411551a4cb79fa51a0b50e77863a6e93ed13a5a3aa6f1e55fe1974d7352e4

MD5 hash:

a46bce0b4f08400434453474a2b2a1c2

SHA1 hash:

a59018fc07488c2c3d0e9f6ff2172486f664bdea

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/d12df980-feda-4356-adce-c5af529e64df/

Parent samples :
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SH256 hash:

fd3f1f3f0c984361bb23b2f6ba22a4bbd636095bf6e9d0c31d77b5ccfceed307

MD5 hash:

1e504d0d93436a776666cc8236d65844

SHA1 hash:

834490f9be03a0814c6460f5aae33af12e83b8f5

Link:

https://www.unpac.me/results/d12df980-feda-4356-adce-c5af529e64df/

SH256 hash:

615e86c97255c785a213ec6ce44bfadd13fde1386f8a896462b0baad04fb478b

MD5 hash:

20a0ca32c009690fc7df812d9e0b49dd

SHA1 hash:

438cb25e7a16faf48c53798a439d1a407b60e817

Link:

https://www.unpac.me/results/d12df980-feda-4356-adce-c5af529e64df/

SH256 hash:

3efb7fb53197e84ea3f27fde2896b0a6b562a48d5aa9718d73cec6a0048570ea

MD5 hash:

0d7bcedec3900018cfcaa66dbeabb2a8

SHA1 hash:

2a52f9f9c10ed457ae29e26e0c22dd017fa7dced

Link:

https://www.unpac.me/results/d12df980-feda-4356-adce-c5af529e64df/

SH256 hash:

d7d9061c604387a231802e8c76f823444531bc5c8c67215c583aa20dd1aa6fe5

MD5 hash:

eedfe4ea6f6d5645eb254493e38c9caf

SHA1 hash:

1647f9208a9a994cb1c20ea3cfa91f5472803a05

Link:

https://www.unpac.me/results/d12df980-feda-4356-adce-c5af529e64df/

SH256 hash:

1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553

MD5 hash:

b109c492de97f6b371df3b89bec1f871

SHA1 hash:

d338c52ed282073123a3b86d73bd80305b12881c

Detections:

INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438

Link:

https://www.unpac.me/results/d12df980-feda-4356-adce-c5af529e64df/

Malware family:

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/1139ba663588/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/1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553

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:	Agenttesla_type2 Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Agenttesla in memory
Reference:	internal research

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_KB_CERT_7c1118cbbadc95da3752c46e47a27438 Create hunting rule
Author:	ditekSHen
Description:	Detects executables signed with stolen, revoked or invalid certificates

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_Digital_Certificate Create hunting rule
Author:	albertzsigovits

Rule name:	pe_imphash Create hunting rule

Rule name:	PE_Potentially_Signed_Digital_Certificate Create hunting rule
Author:	albertzsigovits

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 1139ba6635888fcb5fbe9a0c5f47e54e561c9f5ab485fe8eec05a8712b2dc553

(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 (HIGH_ENTROPY_VA)	high

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