Windows
Analysis Report
CjbMEPJZ3J.exe
Overview
General Information
Sample name: | CjbMEPJZ3J.exerenamed because original name is a hash value |
Original sample name: | c89e812a906a0123f73aed0852b92e82ad0b0806659c1aa6d9fe80ff93268bd8.exe |
Analysis ID: | 1631771 |
MD5: | 3945e5cdc5b6b04511d2288407890ee2 |
SHA1: | b53b49f48b5c01ea24a4d6c45b14eb8a1ffe81f8 |
SHA256: | c89e812a906a0123f73aed0852b92e82ad0b0806659c1aa6d9fe80ff93268bd8 |
Tags: | exeuser-adrian__luca |
Infos: | |
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Antivirus detection for dropped file
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Drops script at startup location
Suricata IDS alerts for network traffic
Yara detected FormBook
Binary is likely a compiled AutoIt script file
Drops VBS files to the startup folder
Found direct / indirect Syscall (likely to bypass EDR)
Joe Sandbox ML detected suspicious 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: WScript or CScript Dropper
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)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Checks if the current process is being debugged
Contains functionality for execution timing, often used to detect debuggers
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to block mouse and keyboard input (often used to hinder debugging)
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Contains functionality to check if a window is minimized (may be used to check if an application is visible)
Contains functionality to communicate with device drivers
Contains functionality to dynamically determine API calls
Contains functionality to execute programs as a different user
Contains functionality to launch a process as a different user
Contains functionality to launch a program with higher privileges
Contains functionality to modify clipboard data
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
Contains functionality to read the clipboard data
Contains functionality to retrieve information about pressed keystrokes
Contains functionality to shutdown / reboot the system
Contains functionality to simulate keystroke presses
Contains functionality to simulate mouse events
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Creates a process in suspended mode (likely to inject code)
Creates a start menu entry (Start Menu\Programs\Startup)
Detected potential crypto function
Drops PE files
Extensive use of GetProcAddress (often used to hide API calls)
Found WSH timer for Javascript or VBS script (likely evasive script)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
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
OS version to string mapping found (often used in BOTs)
Potential key logger detected (key state polling based)
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: Uncommon Svchost Parent Process
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Stores files to the Windows start menu directory
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Classification
- System is w10x64
CjbMEPJZ3J.exe (PID: 7104 cmdline:
"C:\Users\ user\Deskt op\CjbMEPJ Z3J.exe" MD5: 3945E5CDC5B6B04511D2288407890EE2) unnervously.exe (PID: 6568 cmdline:
"C:\Users\ user\Deskt op\CjbMEPJ Z3J.exe" MD5: 3945E5CDC5B6B04511D2288407890EE2) svchost.exe (PID: 6540 cmdline:
"C:\Users\ user\Deskt op\CjbMEPJ Z3J.exe" MD5: 1ED18311E3DA35942DB37D15FA40CC5B) RFZmq3QsG0cUeEpW31gsA.exe (PID: 4416 cmdline:
"C:\Progra m Files (x 86)\sypmna UFIFJpCAPK HlfHuERtKd epteSzkqJB hjVwTSvPgE mYqBPbkqAc KoSPRoofLb EXFa\U80MH bgl.exe" MD5: 9C98D1A23EFAF1B156A130CEA7D2EE3A) raserver.exe (PID: 672 cmdline:
"C:\Window s\SysWOW64 \raserver. exe" MD5: D1053D114847677185F248FF98C3F255) RFZmq3QsG0cUeEpW31gsA.exe (PID: 5844 cmdline:
"C:\Progra m Files (x 86)\sypmna UFIFJpCAPK HlfHuERtKd epteSzkqJB hjVwTSvPgE mYqBPbkqAc KoSPRoofLb EXFa\7Dhra UXqO.exe" MD5: 9C98D1A23EFAF1B156A130CEA7D2EE3A) firefox.exe (PID: 7360 cmdline:
"C:\Progra m Files\Mo zilla Fire fox\Firefo x.exe" MD5: C86B1BE9ED6496FE0E0CBE73F81D8045)
wscript.exe (PID: 6140 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\Micro soft\Windo ws\Start M enu\Progra ms\Startup \unnervous ly.vbs" MD5: A47CBE969EA935BDD3AB568BB126BC80) unnervously.exe (PID: 6444 cmdline:
"C:\Users\ user\AppDa ta\Local\M elba\unner vously.exe " MD5: 3945E5CDC5B6B04511D2288407890EE2) svchost.exe (PID: 6432 cmdline:
"C:\Users\ user\AppDa ta\Local\M elba\unner vously.exe " MD5: 1ED18311E3DA35942DB37D15FA40CC5B)
- 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 | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Click to see the 4 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security |
System Summary |
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Source: | Author: Margaritis Dimitrios (idea), Florian Roth (Nextron Systems), oscd.community: |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Michael Haag: |
Source: | Author: vburov: |
Data Obfuscation |
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Source: | Author: Joe Security: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
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2025-03-07T15:35:37.317159+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49686 | 216.10.241.228 | 80 | TCP |
2025-03-07T15:36:01.110008+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49691 | 162.218.30.235 | 80 | TCP |
2025-03-07T15:36:22.950035+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49695 | 84.32.84.32 | 80 | TCP |
2025-03-07T15:36:36.184664+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49699 | 13.248.169.48 | 80 | TCP |
2025-03-07T15:36:49.575343+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49703 | 209.74.64.189 | 80 | TCP |
2025-03-07T15:37:11.444735+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49707 | 104.21.3.103 | 80 | TCP |
2025-03-07T15:37:25.184568+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49711 | 109.206.161.15 | 80 | TCP |
2025-03-07T15:37:47.408242+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49715 | 45.119.52.109 | 80 | TCP |
2025-03-07T15:38:08.980851+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49719 | 85.13.129.16 | 80 | TCP |
2025-03-07T15:38:22.399438+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49723 | 188.114.97.3 | 80 | TCP |
2025-03-07T15:38:36.321897+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49727 | 188.114.96.3 | 80 | TCP |
2025-03-07T15:38:58.471781+0100 | 2050745 | 1 | Malware Command and Control Activity Detected | 192.168.2.10 | 49731 | 216.10.241.228 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
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2025-03-07T15:35:53.447043+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49688 | 162.218.30.235 | 80 | TCP |
2025-03-07T15:35:56.013998+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49689 | 162.218.30.235 | 80 | TCP |
2025-03-07T15:35:58.586183+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49690 | 162.218.30.235 | 80 | TCP |
2025-03-07T15:36:14.970512+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49692 | 84.32.84.32 | 80 | TCP |
2025-03-07T15:36:17.576814+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49693 | 84.32.84.32 | 80 | TCP |
2025-03-07T15:36:20.348837+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49694 | 84.32.84.32 | 80 | TCP |
2025-03-07T15:36:28.522061+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49696 | 13.248.169.48 | 80 | TCP |
2025-03-07T15:36:31.076410+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49697 | 13.248.169.48 | 80 | TCP |
2025-03-07T15:36:33.629724+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49698 | 13.248.169.48 | 80 | TCP |
2025-03-07T15:36:41.868323+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49700 | 209.74.64.189 | 80 | TCP |
2025-03-07T15:36:44.441561+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49701 | 209.74.64.189 | 80 | TCP |
2025-03-07T15:36:46.997049+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49702 | 209.74.64.189 | 80 | TCP |
2025-03-07T15:37:03.746347+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49704 | 104.21.3.103 | 80 | TCP |
2025-03-07T15:37:06.069002+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49705 | 104.21.3.103 | 80 | TCP |
2025-03-07T15:37:08.896691+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49706 | 104.21.3.103 | 80 | TCP |
2025-03-07T15:37:17.268640+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49708 | 109.206.161.15 | 80 | TCP |
2025-03-07T15:37:19.720563+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49709 | 109.206.161.15 | 80 | TCP |
2025-03-07T15:37:22.420695+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49710 | 109.206.161.15 | 80 | TCP |
2025-03-07T15:37:39.745307+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49712 | 45.119.52.109 | 80 | TCP |
2025-03-07T15:37:42.412573+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49713 | 45.119.52.109 | 80 | TCP |
2025-03-07T15:37:44.853771+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49714 | 45.119.52.109 | 80 | TCP |
2025-03-07T15:38:01.245084+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49716 | 85.13.129.16 | 80 | TCP |
2025-03-07T15:38:03.848896+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49717 | 85.13.129.16 | 80 | TCP |
2025-03-07T15:38:06.443320+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49718 | 85.13.129.16 | 80 | TCP |
2025-03-07T15:38:14.723464+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49720 | 188.114.97.3 | 80 | TCP |
2025-03-07T15:38:17.269502+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49721 | 188.114.97.3 | 80 | TCP |
2025-03-07T15:38:19.885533+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49722 | 188.114.97.3 | 80 | TCP |
2025-03-07T15:38:28.236365+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49724 | 188.114.96.3 | 80 | TCP |
2025-03-07T15:38:30.807499+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49725 | 188.114.96.3 | 80 | TCP |
2025-03-07T15:38:33.445776+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49726 | 188.114.96.3 | 80 | TCP |
2025-03-07T15:38:50.845514+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49728 | 216.10.241.228 | 80 | TCP |
2025-03-07T15:38:53.405534+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49729 | 216.10.241.228 | 80 | TCP |
2025-03-07T15:38:55.923280+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49730 | 216.10.241.228 | 80 | TCP |
2025-03-07T15:39:04.341127+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49732 | 162.218.30.235 | 80 | TCP |
2025-03-07T15:39:07.368692+0100 | 2855464 | 1 | A Network Trojan was detected | 192.168.2.10 | 49733 | 162.218.30.235 | 80 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Code function: | 0_2_00194696 | |
Source: | Code function: | 0_2_0019C93C | |
Source: | Code function: | 0_2_0019C9C7 | |
Source: | Code function: | 0_2_0019F200 | |
Source: | Code function: | 0_2_0019F35D | |
Source: | Code function: | 0_2_0019F65E | |
Source: | Code function: | 0_2_00193A2B | |
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Source: | Code function: | 0_2_0019BF27 | |
Source: | Code function: | 2_2_00074696 | |
Source: | Code function: | 2_2_0007C93C | |
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Source: | Code function: | 2_2_00073A2B | |
Source: | Code function: | 2_2_00073D4E | |
Source: | Code function: | 2_2_0007BF27 |
Networking |
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Source: | Code function: | 0_2_001A25E2 |
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