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Windows
Analysis Report
jlsvOH1c8bSRKqM.exe
Overview
General Information
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic
Yara detected AntiVM3
Yara detected FormBook
.NET source code contains potential unpacker
AI detected suspicious sample
Adds a directory exclusion to Windows Defender
Found direct / indirect Syscall (likely to bypass EDR)
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses cmd line tools excessively to alter registry or file data
Uses schtasks.exe or at.exe to add and modify task schedules
Allocates memory with a write watch (potentially for evading sandboxes)
Binary contains a suspicious time stamp
Checks if the current process is being debugged
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to read the PEB
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
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 inlined nop instructions (likely shell or obfuscated code)
Found large amount of non-executed APIs
Found potential string decryption / allocating functions
IP address seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicious Add Scheduled Task Parent
Sigma detected: Suspicious Schtasks From Env Var Folder
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Uses reg.exe to modify the Windows registry
Yara signature match
Classification
- System is w10x64
- jlsvOH1c8bSRKqM.exe (PID: 7268 cmdline:
"C:\Users\ user\Deskt op\jlsvOH1 c8bSRKqM.e xe" MD5: 5CB7ACEF6FCB2F9FEED94483F364030A) - powershell.exe (PID: 7452 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" Add-MpPref erence -Ex clusionPat h "C:\User s\user\Des ktop\jlsvO H1c8bSRKqM .exe" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - conhost.exe (PID: 7460 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - WmiPrvSE.exe (PID: 7832 cmdline:
C:\Windows \system32\ wbem\wmipr vse.exe -s ecured -Em bedding MD5: 60FF40CFD7FB8FE41EE4FE9AE5FE1C51) - powershell.exe (PID: 7504 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" Add-MpPref erence -Ex clusionPat h "C:\User s\user\App Data\Roami ng\AZJifQr hDpEQCA.ex e" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - conhost.exe (PID: 7524 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - schtasks.exe (PID: 7532 cmdline:
"C:\Window s\System32 \schtasks. exe" /Crea te /TN "Up dates\AZJi fQrhDpEQCA " /XML "C: \Users\use r\AppData\ Local\Temp \tmpB59F.t mp" MD5: 48C2FE20575769DE916F48EF0676A965) - conhost.exe (PID: 7560 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - jlsvOH1c8bSRKqM.exe (PID: 7724 cmdline:
"C:\Users\ user\Deskt op\jlsvOH1 c8bSRKqM.e xe" MD5: 5CB7ACEF6FCB2F9FEED94483F364030A) - DAGiwzvTYsMjq.exe (PID: 4956 cmdline:
"C:\Progra m Files (x 86)\pvpebM HFtOfoLpRm lJtDsAgNef yNWORdfeJS YcYMaxaO\D AGiwzvTYsM jq.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - reg.exe (PID: 8088 cmdline:
"C:\Window s\SysWOW64 \reg.exe" MD5: CDD462E86EC0F20DE2A1D781928B1B0C) - DAGiwzvTYsMjq.exe (PID: 5764 cmdline:
"C:\Progra m Files (x 86)\pvpebM HFtOfoLpRm lJtDsAgNef yNWORdfeJS YcYMaxaO\D AGiwzvTYsM jq.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 6488 cmdline:
"C:\Progra m Files\Mo zilla Fire fox\Firefo x.exe" MD5: C86B1BE9ED6496FE0E0CBE73F81D8045)
- AZJifQrhDpEQCA.exe (PID: 7752 cmdline:
C:\Users\u ser\AppDat a\Roaming\ AZJifQrhDp EQCA.exe MD5: 5CB7ACEF6FCB2F9FEED94483F364030A) - schtasks.exe (PID: 7976 cmdline:
"C:\Window s\System32 \schtasks. exe" /Crea te /TN "Up dates\AZJi fQrhDpEQCA " /XML "C: \Users\use r\AppData\ Local\Temp \tmpCB2B.t mp" MD5: 48C2FE20575769DE916F48EF0676A965) - conhost.exe (PID: 7984 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - AZJifQrhDpEQCA.exe (PID: 8020 cmdline:
"C:\Users\ user\AppDa ta\Roaming \AZJifQrhD pEQCA.exe" MD5: 5CB7ACEF6FCB2F9FEED94483F364030A) - AZJifQrhDpEQCA.exe (PID: 8028 cmdline:
"C:\Users\ user\AppDa ta\Roaming \AZJifQrhD pEQCA.exe" MD5: 5CB7ACEF6FCB2F9FEED94483F364030A) - AZJifQrhDpEQCA.exe (PID: 8036 cmdline:
"C:\Users\ user\AppDa ta\Roaming \AZJifQrhD pEQCA.exe" MD5: 5CB7ACEF6FCB2F9FEED94483F364030A) - DAGiwzvTYsMjq.exe (PID: 6008 cmdline:
"C:\Progra m Files (x 86)\pvpebM HFtOfoLpRm lJtDsAgNef yNWORdfeJS YcYMaxaO\D AGiwzvTYsM jq.exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - reg.exe (PID: 5216 cmdline:
"C:\Window s\SysWOW64 \reg.exe" MD5: CDD462E86EC0F20DE2A1D781928B1B0C)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Formbook, Formbo | FormBook contains a unique crypter RunPE that has unique behavioral patterns subject to detection. It was initially called "Babushka Crypter" by Insidemalware. |
⊘No configs have been found
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Click to see the 19 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
|
System Summary |
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Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Persistence and Installation Behavior |
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Source: | Author: Joe Security: |
Timestamp: | 07/08/24-09:33:28.821901 |
SID: | 2855465 |
Source Port: | 49741 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | ReversingLabs: | |||
Source: | Virustotal: | Perma Link |
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Source: | Code function: | 17_2_02CEC070 |
Source: | Code function: | 0_2_070614DA | |
Source: | Code function: | 9_2_070F06D2 | |
Source: | Code function: | 9_2_070F0828 | |
Source: | Code function: | 17_2_02CD9780 | |
Source: | Code function: | 17_2_02CE259D | |
Source: | Code function: | 17_2_03420548 |
Networking |
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