MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7. 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


AgentTesla


Vendor detections: 17


Intelligence 17 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7
SHA3-384 hash: f7c02031b89a45e77c5aa98f56a25bdead2f6f4840721df66ab44865992c47ff47178e4691cee5c4d9b2b33dcb5d68b7
SHA1 hash: 1e3c4876576b8c93854ec408abc8096c23d963ca
MD5 hash: 40c97d45e36cb3764c94341db6d5886b
humanhash: item-three-two-fillet
File name:Nrb.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:629'760 bytes
First seen:2023-09-11 15:05:36 UTC
Last seen:2023-09-11 16:08:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:m5r2iNZ1D8M4BoNDpachLqriqEyi/REovWM/eBzXgcPB7F1IpCgVQqgDA88/:mh1pD+2lpachWGZZEoOMWhggcpCg2xDE
Threatray 5'579 similar samples on MalwareBazaar
TLSH T12CD4238EF7EC413FC90D4DF97C1B53516772A80B62C1DF4FAC989825886779E8D20266
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter cocaman
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
4
# of downloads :
313
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
Nrb.exe
Verdict:
Malicious activity
Analysis date:
2023-09-11 15:06:36 UTC
Tags:
agenttesla stealer
Link:
https://app.any.run/tasks/5f52c029-26a6-4189-9896-e6c8f31cabd4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
AgentTesla
Create hunting rule
Link:
https://www.capesandbox.com/analysis/447988/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a process with a hidden window
Creating a file in the %temp% directory
Launching a process
Adding an exclusion to Microsoft Defender
Gathering data
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/af597770-02ea-4d29-8d85-3442c91537df
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1307406
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
May check the online IP address of the machine
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: Scheduled temp file as task from temp location
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 schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1307406 Sample: Nrb.exe Startdate: 11/09/2023 Architecture: WINDOWS Score: 100 45 Found malware configuration 2->45 47 Antivirus / Scanner detection for submitted sample 2->47 49 Sigma detected: Scheduled temp file as task from temp location 2->49 51 7 other signatures 2->51 7 Nrb.exe 7 2->7         started        11 IEQbbIeCRokNW.exe 5 2->11         started        process3 file4 31 C:\Users\user\AppData\...\IEQbbIeCRokNW.exe, PE32 7->31 dropped 33 C:\Users\user\AppData\Local\...\tmpE5CA.tmp, XML 7->33 dropped 53 Uses schtasks.exe or at.exe to add and modify task schedules 7->53 55 Writes to foreign memory regions 7->55 57 Adds a directory exclusion to Windows Defender 7->57 59 Injects a PE file into a foreign processes 7->59 13 RegSvcs.exe 15 2 7->13         started        17 powershell.exe 19 7->17         started        19 schtasks.exe 1 7->19         started        61 Antivirus detection for dropped file 11->61 63 Multi AV Scanner detection for dropped file 11->63 65 Machine Learning detection for dropped file 11->65 67 Allocates memory in foreign processes 11->67 21 RegSvcs.exe 2 11->21         started        23 schtasks.exe 1 11->23         started        signatures5 process6 dnsIp7 35 mail.sirisexpress.com 23.106.253.14, 49717, 49720, 587 LEASEWEB-APAC-SIN-11LeasewebAsiaPacificpteltdSG Singapore 13->35 37 api4.ipify.org 64.185.227.156, 443, 49714 WEBNXUS United States 13->37 39 api.ipify.org 13->39 69 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 13->69 71 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 13->71 73 May check the online IP address of the machine 13->73 25 conhost.exe 17->25         started        27 conhost.exe 19->27         started        41 173.231.16.77, 443, 49719 WEBNXUS United States 21->41 43 api.ipify.org 21->43 75 Tries to steal Mail credentials (via file / registry access) 21->75 77 Tries to harvest and steal browser information (history, passwords, etc) 21->77 29 conhost.exe 23->29         started        signatures8 process9
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7/
Threat name:
Win32.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2023-09-11 07:49:51 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
21 of 24 (87.50%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3c25j7setglwky55dvd4euwhbqha4sveet7vxcqifivku3gdt3lq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
2627e96c1ea96adf04b4709b5cdb2fe6b9cd9b82ff959cdde4e61a4acb9cbf4d
AgentTesla
7a3f9e8c7610b1b6bc6433234fcc92a41834657cbe2f0bf74442d772df664568
AgentTesla
9c715b1f528e3ac5d2a6c36d162880ac8ccc240e25022b363dc3726f2d7e2fff
AgentTesla
a3838f118bbfcd8759b3a449924c84893908e1333ae5a321fe6fec55c28af707
AgentTesla
a5bb69e8eb8f39ddf00bdfe2034d4bfcb7f17fe8de32c374c7183a22b38bf23f
AgentTesla
b3be1fe7098ff321491612d574fa9b51205e823f9883abe7f234aaa39f0a32bd
AgentTesla
b63ed1999685c3144cb61f9091b54f33fbcf657f3ea910b11e57e5cf8f1bf2c7
AgentTesla
b9c74c6cf3df328ddeee396c2602a7d93a6fa4f8fc3f1e67e41d91e290592e4e
AgentTesla
c8db380ca07d006181dfa5dfa774c52a97b03688af074b796f3e4da284e8a4bd
AgentTesla
+ 5'569 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla collection keylogger spyware stealer trojan
Link:
https://tria.ge/reports/230911-sgqvqagh66/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Looks up external IP address via web service
Checks computer location settings
AgentTesla
Unpacked files
SH256 hash:
57e857a9b7ea4fa594cc1c5620ef34073463c7b38676e8557113db37a5b62cf5
MD5 hash:
1cca58b40ad316aa6593870691b3e2f9
SHA1 hash:
89acd9a55cdfd8ab8a27031413543d3cfce1f6df
Link:
https://www.unpac.me/results/ef7dd2f3-36bd-41a6-8b2d-eb9c85f75b4e/
SH256 hash:
6aa715a5ab63ab573934ae972a9b5175a126eaea4fead5ce3d14d3d3648ae5c4
MD5 hash:
63f724ebf8ec959870d640210bf9dc40
SHA1 hash:
71716d5820754b0c504d81847d68aaa1a568dabf
Link:
https://www.unpac.me/results/ef7dd2f3-36bd-41a6-8b2d-eb9c85f75b4e/
SH256 hash:
a5bb69e8eb8f39ddf00bdfe2034d4bfcb7f17fe8de32c374c7183a22b38bf23f
MD5 hash:
efa98bccfb47f235c8bc8b941aae2645
SHA1 hash:
6094a073a76571fce2ceb33d95fe3aa1868387fe
Detections:
AgentTesla
Create hunting rule
Link:
https://www.unpac.me/results/ef7dd2f3-36bd-41a6-8b2d-eb9c85f75b4e/
Parent samples :
c01aa0e49d9443f5f4a9c46893397d054eea93f921734704e1294d77d44876af
b9c74c6cf3df328ddeee396c2602a7d93a6fa4f8fc3f1e67e41d91e290592e4e
a5bb69e8eb8f39ddf00bdfe2034d4bfcb7f17fe8de32c374c7183a22b38bf23f
e665c078835904e48daa2a64c901b5c9a22c3ba292f80d4e718e3fc88b26a2fe
d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7
9e59b864f851b2101f28ed67a8f5e52fbac208c1b4fda85b7b378dd28e182941
SH256 hash:
0630b864e828fff2d66f33ab7d00fad231df4c00fc0bbad313ee0d12ca503198
MD5 hash:
f559a9abbd849eb977d262d597d6e4fd
SHA1 hash:
0a8769b40b026852690c89b913c2812817ef43c8
Link:
https://www.unpac.me/results/ef7dd2f3-36bd-41a6-8b2d-eb9c85f75b4e/
Parent samples :
cef72412a1dd9486bae5f7e606d4330660fba98575ba1c939559ccc83536f41a
81ccf158093718305b3499d0f16d8a82bcad69f2740066daca8d5b5ca9979688
SH256 hash:
d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7
MD5 hash:
40c97d45e36cb3764c94341db6d5886b
SHA1 hash:
1e3c4876576b8c93854ec408abc8096c23d963ca
Link:
https://www.unpac.me/results/ef7dd2f3-36bd-41a6-8b2d-eb9c85f75b4e/
Malware family:
AgentTesla.v4
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d8b5d4fe4499/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/d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7

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: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

File information

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

Malspam

AgentTesla

rar d8f5077af987289051b2171cc862f5584adf7364f29c14d8c5ebde4e20be498c

AgentTesla

Executable exe d8b5d4fe4499976563bd1d47c252c70c0e0e4aa424ff5b8a082a2aaa6cc39ed7

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 d8f5077af987289051b2171cc862f5584adf7364f29c14d8c5ebde4e20be498c
Cape
Cape
https://www.capesandbox.com/analysis/447988/
  
Dropped by
MD5 774cfeaf6aed35dca1985f5b8d092c7b

Comments