MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11. 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: 16

Intelligence 16 IOCs YARA 16 File information Comments

SHA256 hash:	aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11
SHA3-384 hash:	11888300a931f65669d7b8ff4df2e458c1bfc945005854c226f3e62e3cb0d128fbf8edf76311290fbe260b970900bc32
SHA1 hash:	84995cbfec91c10df85c97d0f7acec531dba455c
MD5 hash:	749404f8b6bd72307f017d1fd8f3081e
humanhash:	apart-pluto-lima-william
File name:	QUOTATION_MARQTRA031244úPDF.scr
Download:	download sample
Signature	Formbook Create hunting rule
File size:	2'534'912 bytes
First seen:	2024-03-28 12:58:30 UTC
Last seen:	2024-03-28 14:19:57 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'743 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep	49152:i5L4P8xfttrOoXDhNkxtOTBcziRLhT2vWkYd9n:OymFtrOGhNkxY9RcOkY
Threatray	4'484 similar samples on MalwareBazaar
TLSH	T184C512743FCB8A66E69D03BCE052513943F5C017E5CAC74EDD94E0E92C8BB56960A0AF
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 :

352

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11.exe

Verdict:

Malicious activity

Analysis date:

2024-03-28 13:01:52 UTC

Tags:

evasion agenttesla stealer

Link:

https://app.any.run/tasks/20204c34-0c85-4522-af4b-08e5377f09b7

Note:

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

Result

Verdict:

Suspicious

Maliciousness:

Behaviour

Launching a process

Moving a file to the Program Files subdirectory

Replacing files

Creating a process with a hidden window

Verdict:

Malicious

Labled as:

IL:Trojan.MSILZilla

Link:

https://www.hybrid-analysis.com/sample/aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11

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.

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/e52ca5af-ebe1-4c03-8c2f-c0c8dd6bb532

Result

Threat name:

AgentTesla, PureLog Stealer

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1417017

Signature

.NET source code contains potential unpacker

Allocates memory in foreign processes

Check if machine is in data center or colocation facility

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

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)

Queries sensitive video device information (via WMI, Win32_VideoController, 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)

Writes to foreign memory regions

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:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11/

Threat name:

ByteCode-MSIL.Spyware.Negasteal

Status:

Malicious

First seen:

2024-03-28 10:51:54 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

21 of 24 (87.50%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=vjpjavrq7xgtipvayg64ihdh5q5wbk6kwuhs5v547outdz6tb4iq._file

Verdict:

malicious

Label(s):

agenttesla_v4

agenttesla

Formbook

a725162020873c30288047a60ac4fbe92f96e4393ec7b6cf36a38fd0eeb0e25f

Formbook

dcef69c94d8166b5bd96de0c8b5cc686bc3ec021c7754b43900a50a7913e0a9b

Formbook

ed02a2ae00a8ecc81f06f53547274e174259f4fecd1abacd502b6ae4a5408598

Formbook

fc1bc12b9fd30ac827862bbdcb650af53170b938ad575092afe6f85929d6dae0

Formbook

+ 4'474 additional samples on MalwareBazaar

Result

Malware family:

zgrat

Score:

10/10

Tags:

family:agenttesla family:purelogstealer family:zgrat keylogger rat spyware stealer trojan

Link:

https://tria.ge/reports/240328-p73enaeg2w/

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

AgentTesla

Detect ZGRat V1

PureLog Stealer

PureLog Stealer payload

ZGRat

Unpacked files

SH256 hash:

f974f299f12d98e9673cfdf81e154694a2eb1379acb592dc4e61d8c4a4e37a6e

MD5 hash:

dddbe7d2902cf8821a52e597dc9b5586

SHA1 hash:

7668380b9a734ba73ffa327124aba86b7ff6ca81

Link:

https://www.unpac.me/results/151d7471-676f-4d72-a013-7053338e00db/

SH256 hash:

75c3bf320652965b759f797aa661c9c8535df7e4c38e0d4d4ad9511a6923c7fe

MD5 hash:

ed76fac938d76492c00b190dfaed34f7

SHA1 hash:

51719169957d22d59b2cb363bbc83074b1a538a4

Detections:

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_SUSPICIOUS_EXE_References_Confidential_Data_Store

Link:

https://www.unpac.me/results/151d7471-676f-4d72-a013-7053338e00db/

SH256 hash:

c088ea4aa7702db8493b39d9cb2fe94d660cbb0de4ab87249cea305df4dbf6ab

MD5 hash:

37405dfa2ea48f3c455436818668ab85

SHA1 hash:

0c26eab9f41904e6e81fa850a4bfe9d410805ef8

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/151d7471-676f-4d72-a013-7053338e00db/

Parent samples :

fc1bc12b9fd30ac827862bbdcb650af53170b938ad575092afe6f85929d6dae0
c088ea4aa7702db8493b39d9cb2fe94d660cbb0de4ab87249cea305df4dbf6ab
5f77d00c25d59a2768f177de6643bc4c655cd621617529691e5339754e1ca118
199854b9d6151b9a4840baee02f0fe5f32e64d1504ecc3c6213fbef4e4e5037a
407fc451a24a5a7d08b067fc8a1361f57e0f46331c19c4e069ae2d967cd33084
aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11

SH256 hash:

b0b05ce655837e212e23e0fca287405309fde1c697ff4e410d9fdd201512e1f0

MD5 hash:

3bc672ab7164fb060b173b87b6d56d00

SHA1 hash:

f712b27a03879e20542c1b67c255df0e87002321

Link:

https://www.unpac.me/results/151d7471-676f-4d72-a013-7053338e00db/

SH256 hash:

8a3ec30957670c5472450de709ba8ec00a36cf2e3a2f7a70051df374d924229d

MD5 hash:

0291141c5c7f4c3bc0c8dd54aab468f5

SHA1 hash:

818950d1fa6e14cd1a55337bd6e42714e500a9d5

Link:

https://www.unpac.me/results/151d7471-676f-4d72-a013-7053338e00db/

SH256 hash:

aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11

MD5 hash:

749404f8b6bd72307f017d1fd8f3081e

SHA1 hash:

84995cbfec91c10df85c97d0f7acec531dba455c

Link:

https://www.unpac.me/results/151d7471-676f-4d72-a013-7053338e00db/

Malware family:

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/aa5e905630fd/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/aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11

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_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:	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 aa5e905630fdcd343ea0c1bdc41c67ec3b60abcab50f2ed7bcfba931e7d30f11

(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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