MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0758171eb92e029d38cef3237e2cdd899827cdeeb3386761933254981b707809. 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


NanoCore


Vendor detections: 13


Intelligence 13 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0758171eb92e029d38cef3237e2cdd899827cdeeb3386761933254981b707809
SHA3-384 hash: 0b6361fc4a56583b1feb662c8617cd2380bd472be85a38b8e117378d820d616e21b74c1ed8d11a113c591ca0ef354fc0
SHA1 hash: 75d8e0a5042ab6182ba15e5bfabed68e861e09de
MD5 hash: 92662b5394933391a7994e4ced21bbf8
humanhash: hot-cardinal-bakerloo-lemon
File name:unpackedasync.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:48'640 bytes
First seen:2022-02-10 03:56:39 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 768:qu/6ZTgoiziWUUM9rmo2qru+cRdc9gGVEFPIrm/0b9EXaSDrxc4Rw20L0CT42RlX:qu/6ZTgle2NXXc9gGVECrmcbCXaIFc4k
Threatray 5'350 similar samples on MalwareBazaar
TLSH T112232B003BE98127F3BE4F74A9F32245867BF2777602D64E1CC4419B5613FC29A526EA
Reporter ankit_anubhav
Tags:exe mansengco778-ddns-net NanoCore NGStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
199
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
unpackedasync.exe
Verdict:
Malicious activity
Analysis date:
2022-02-10 04:00:33 UTC
Tags:
trojan rat asyncrat nanocore stealer avemaria
Link:
https://app.any.run/tasks/1c134bc1-09b5-4036-a139-61959a3f2bdc

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.Samas-7998113-0
Create hunting rule

Win.Packed.Razy-9625918-0
Create hunting rule

Win.Packed.AsyncRAT-9861056-1
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Using the Windows Management Instrumentation requests
DNS request
Creating a file in the %temp% directory
Running batch commands
Creating a process with a hidden window
Sending a custom TCP request
Creating a process from a recently created file
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Launching a process
Searching for synchronization primitives
Query of malicious DNS domain
Sending a TCP request to an infection source
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm asyncrat greyware njrat obfuscated packed rat replace.exe schtasks.exe
Link:
https://www.filescan.io/uploads/62048d12942573cad44e2b01/reports/b6123fad-5c00-44a8-a857-a8688674a81c/overview
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:
AsyncRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/159540d2-b416-4367-b5cf-97d519e17b29
Result
Threat name:
Nanocore AsyncRAT AveMaria UACMe
Create hunting rule
Detection:
malicious
Classification:
phis.troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/937535
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
Connects to many ports of the same IP (likely port scanning)
Contains functionality to hide user accounts
Detected Nanocore Rat
Drops PE files with a suspicious file extension
Hides that the sample has been downloaded from the Internet (zone.identifier)
Increases the number of concurrent connection per server for Internet Explorer
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Protects its processes via BreakOnTermination flag
Sigma detected: NanoCore
Sigma detected: Suspicious Script Execution From Temp Folder
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected AsyncRAT
Yara detected AveMaria stealer
Yara detected Nanocore RAT
Yara detected UACMe UAC Bypass tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 570013 Sample: unpackedasync.exe Startdate: 10/02/2022 Architecture: WINDOWS Score: 100 104 newcracker.duckdns.org 2->104 106 mansengco778.ddns.net 2->106 130 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->130 132 Malicious sample detected (through community Yara rule) 2->132 134 Antivirus detection for URL or domain 2->134 136 20 other signatures 2->136 12 unpackedasync.exe 1 7 2->12         started        17 rmdlmu.exe 3 2->17         started        19 dhcpmon.exe 3 2->19         started        21 dhcpmon.exe 2->21         started        signatures3 process4 dnsIp5 108 mansengco778.ddns.net 194.5.98.120, 19864, 49714, 49718 DANILENKODE Netherlands 12->108 110 windowsupdate.s.llnwi.net 12->110 88 C:\Users\user\AppData\Local\Temp\sfflzb.exe, PE32 12->88 dropped 90 C:\Users\user\AppData\Local\Temp\rmdlmu.exe, PE32 12->90 dropped 92 C:\Users\user\AppData\Local\Temp\lbusbs.exe, PE32 12->92 dropped 94 C:\Users\user\AppData\Local\Temp\fyzfvm.scr, PE32 12->94 dropped 142 Drops PE files with a suspicious file extension 12->142 23 cmd.exe 1 12->23         started        26 cmd.exe 12->26         started        28 cmd.exe 12->28         started        30 cmd.exe 1 12->30         started        96 C:\Users\user\AppData\...\rmdlmu.exe.log, ASCII 17->96 dropped 98 C:\Users\user\AppData\...\dhcpmon.exe.log, ASCII 19->98 dropped file6 signatures7 process8 signatures9 138 Suspicious powershell command line found 23->138 140 Bypasses PowerShell execution policy 23->140 32 powershell.exe 14 23->32         started        34 conhost.exe 23->34         started        36 powershell.exe 26->36         started        38 conhost.exe 26->38         started        40 powershell.exe 28->40         started        42 conhost.exe 28->42         started        44 powershell.exe 30->44         started        46 conhost.exe 30->46         started        process10 process11 48 rmdlmu.exe 1 14 32->48         started        53 lbusbs.exe 36->53         started        55 sfflzb.exe 40->55         started        57 fyzfvm.scr 44->57         started        dnsIp12 100 newcracker.duckdns.org 48->100 78 C:\Program Files (x86)\...\dhcpmon.exe, PE32 48->78 dropped 80 C:\Users\user\AppData\Roaming\...\run.dat, data 48->80 dropped 82 C:\Users\user\AppData\Local\...\tmp5936.tmp, XML 48->82 dropped 112 Antivirus detection for dropped file 48->112 114 Multi AV Scanner detection for dropped file 48->114 116 Protects its processes via BreakOnTermination flag 48->116 118 Uses schtasks.exe or at.exe to add and modify task schedules 48->118 59 schtasks.exe 1 48->59         started        61 schtasks.exe 1 48->61         started        102 mansengco778.ddns.net 53->102 120 Machine Learning detection for dropped file 53->120 122 Increases the number of concurrent connection per server for Internet Explorer 53->122 124 Hides that the sample has been downloaded from the Internet (zone.identifier) 53->124 84 C:\Users\user\AppData\...\wZtRtXFEcO.exe, PE32 55->84 dropped 126 Injects a PE file into a foreign processes 55->126 86 C:\Users\user\AppData\Local\...\uonsewk.pif, PE32 57->86 dropped 128 Drops PE files with a suspicious file extension 57->128 63 uonsewk.pif 57->63         started        file13 signatures14 process15 signatures16 66 schtasks.exe 59->66         started        68 conhost.exe 59->68         started        70 sfflzb.exe 59->70         started        74 3 other processes 59->74 72 conhost.exe 61->72         started        144 Multi AV Scanner detection for dropped file 63->144 process17 process18 76 conhost.exe 66->76         started       
Detection:
asyncrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/0758171eb92e029d38cef3237e2cdd899827cdeeb3386761933254981b707809/
Threat name:
ByteCode-MSIL.Backdoor.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2022-02-10 03:57:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
26 of 28 (92.86%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=a5mbohvzfybj2ogo6mrx4lg5rgmcptpowm4goymtgjkjqg3qpaeq._file
Verdict:
malicious
Label(s):
asyncrat
Create hunting rule
avemaria
Create hunting rule
nanocorerat
Create hunting rule
Similar samples:
0b1396805e736275f16550f3ecc5361cfcccc468094b4ea910ded8eaf430a5b3
NanoCore
30e1ba61a63a27b668eee09f960a83d944e878c33b46f85ea86bacdf1427f4dd
NanoCore
8bf0518cd0c607aa51073dfe422f6af43ab8b43523bd0c182cc6172c9ecb9072
NanoCore
8de953938b8fb2d222892012da5758cefe50de064f61416c2bc2c6e6f019352c
NanoCore
a6e96b24ad76297cbdd192bf19982e53f57ff187ed84f6bdf9c269fa1e2f5259
NanoCore
acc1c22f2003ccec8114d0cf6f022836c8e00ab0e895a6a59f6a11cdec2db3b4
NanoCore
d401cecef9371db314f39d5c4bf3457340d7be6f0aac6c61b3cd25310a9dfadf
NanoCore
e3a4b7f4c06b234b71769adaa1df2b4e00b7c1953ffcc9216a89b2c8a673de47
NanoCore
+ 5'340 additional samples on MalwareBazaar
Result
Malware family:
asyncrat
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat rat suricata
Link:
https://tria.ge/reports/220210-ehx4jadcfl/
Behaviour
Checks processor information in registry
Modifies data under HKEY_USERS
Suspicious use of AdjustPrivilegeToken
Drops file in Windows directory
Async RAT payload
AsyncRat
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
Unpacked files
SH256 hash:
0758171eb92e029d38cef3237e2cdd899827cdeeb3386761933254981b707809
MD5 hash:
92662b5394933391a7994e4ced21bbf8
SHA1 hash:
75d8e0a5042ab6182ba15e5bfabed68e861e09de
Detections:
win_asyncrat_w0
Create hunting rule
Link:
https://www.unpac.me/results/dbbba458-5aaa-44d7-8b04-0b5f63a971c2/
Parent samples :
17cb794e094d6cf35a700c399316360eb20eb235be61377ffd6dd0022ac3bb5f
b456e525822c88584714321dfb3f1aa4ce6ac1efeea7d83792a7d109de17302e
0758171eb92e029d38cef3237e2cdd899827cdeeb3386761933254981b707809
Please note that we are no longer able to provide a coverage score for Virus Total.

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:asyncrat
Create hunting rule
Author:jeFF0Falltrades
Rule name:AsyncRat
Create hunting rule
Author:kevoreilly, JPCERT/CC Incident Response Group
Description:AsyncRat Payload
Rule name:INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse
Create hunting rule
Author:ditekSHen
Description:Detects file containing reversed ASEP Autorun registry keys
Rule name:malware_asyncrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_asyncrat_j1
Create hunting rule
Author:Johannes Bader @viql
Description:detects AsyncRAT
Rule name:win_asyncrat_w0
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect AsyncRat in memory
Reference:internal research

File information

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

Malspam

NanoCore

Executable exe 0758171eb92e029d38cef3237e2cdd899827cdeeb3386761933254981b707809

(this sample)

  
Delivery method
Distributed via e-mail attachment

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