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Windows
Analysis Report
CV.bat.exe
Overview
General Information
Detection
FormBook
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Multi AV Scanner detection for submitted file
Yara detected FormBook
Malicious sample detected (through community Yara rule)
Yara detected AntiVM3
System process connects to network (likely due to code injection or exploit)
Sigma detected: Scheduled temp file as task from temp location
Multi AV Scanner detection for dropped file
Sample uses process hollowing technique
Tries to steal Mail credentials (via file / registry access)
Maps a DLL or memory area into another process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
Queues an APC in another process (thread injection)
Deletes itself after installation
Machine Learning detection for dropped file
Modifies the context of a thread in another process (thread injection)
C2 URLs / IPs found in malware configuration
Adds a directory exclusion to Windows Defender
Uses schtasks.exe or at.exe to add and modify task schedules
Tries to harvest and steal browser information (history, passwords, etc)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Internet Provider seen in connection with other malware
Detected potential crypto function
Found potential string decryption / allocating functions
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to call native functions
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Contains functionality for execution timing, often used to detect debuggers
Contains long sleeps (>= 3 min)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Sample file is different than original file name gathered from version info
Drops PE files
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Checks if the current process is being debugged
Found large amount of non-executed APIs
Creates a process in suspended mode (likely to inject code)
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Classification
- System is w10x64
- CV.bat.exe (PID: 6056 cmdline:
C:\Users\u ser\Deskto p\CV.bat.e xe MD5: 40372D67F0DE4526F04FBA7948F7FF02) - powershell.exe (PID: 5156 cmdline:
C:\Windows \System32\ WindowsPow erShell\v1 .0\powersh ell.exe" A dd-MpPrefe rence -Exc lusionPath "C:\Users \user\AppD ata\Roamin g\PzKpucfD tCCmww.exe MD5: DBA3E6449E97D4E3DF64527EF7012A10) - conhost.exe (PID: 5152 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496) - schtasks.exe (PID: 5148 cmdline:
C:\Windows \System32\ schtasks.e xe" /Creat e /TN "Upd ates\PzKpu cfDtCCmww" /XML "C:\ Users\user \AppData\L ocal\Temp\ tmpE00F.tm p MD5: 15FF7D8324231381BAD48A052F85DF04) - conhost.exe (PID: 5908 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496) - CV.bat.exe (PID: 5060 cmdline:
C:\Users\u ser\Deskto p\CV.bat.e xe MD5: 40372D67F0DE4526F04FBA7948F7FF02) - explorer.exe (PID: 3452 cmdline:
C:\Windows \Explorer. EXE MD5: AD5296B280E8F522A8A897C96BAB0E1D) - chkdsk.exe (PID: 1264 cmdline:
C:\Windows \SysWOW64\ chkdsk.exe MD5: 2D5A2497CB57C374B3AE3080FF9186FB)
- cleanup
{"C2 list": ["www.miarizzuto.org/redb/"], "decoy": ["p38MheawG5TlW4TfEW6HgnBkENlaHA==", "F+wu9lADd7UfKolzCb9JriAY5iBtDQ==", "PMgcpd10tc8LZXzLxv4=", "4aYRlQCb7ZZngur8q5Rm3kIG7S0=", "gae+T40jXAwQNntTjeU=", "nDNoH34RcgfW/T4Ywoj4GxdCtw==", "FubuYrVZyeowZKOpSkjwGxdCtw==", "NsZyQ5lBhfS7M1Yx4Q==", "ShBaHnokZaIGGCu+v/w=", "lWJW3gysIs6U7DGWty1OHzCrue9z", "qsjESV5CtJxV0SgCbsJewg==", "P+EX8vkyJWffLEtt97JEwA==", "z/cJhdNs94kvQZJi2VN6Q+7grOZx", "AdeUdb1hY9RKdOmFObn0", "4IR+FFv7MeHN6Cf+bsJewg==", "1qYHwBCj8omX9xww4w==", "EqleInYijmBzntqzWkNfsmA=", "wdDzwzcDOKBinhcAbsJewg==", "krhiJnYVgPe19Ug47cFafWXBYNNeHA==", "XvZT4SS4I5z7I4KPKwE1rUXn", "3+jWW9Cjn6CDtRam33vCu29XvQ==", "fixwUsqR/Bhvoxelu8p62kIG7S0=", "+xZKR0ZmPHiNmA==", "s+wCc7RamYK1zRtqV4tu20IG7S0=", "Adpp4DwAZvKTqQTutY78GxdCtw==", "ENoh3DrcN71TZZ7yuDwz7hb4", "hVdX90DrOpYeTLlSjDqBHsUhvw==", "JLDfpyXXPZoFE3hUyUMtOjPw", "vcxK310Uizkei4li+g==", "jVoz8Wo8fftcy0Y19A==", "/9NY2EQWgeFpnOE4PpKhiEIG7S0=", "VWWBP5ApimC5WSu+v/w=", "/4jic9h447GVpPjaiJJDt1OWV9Tjrj8=", "Q3IXW01pPHiNmA==", "zu5p800BTjnc+HBX", "sHpILIYjPHiNmA==", "kzZ3NXccc1VJU6b8CQlYPzCgLCU=", "JkDjrfap8OwGNo5l7b9NWnBWAjF/FA==", "eZ7YtfuZDNykFpLz6w==", "+xCzdKQ4l9xjnPSCps41rUXn", "AMBRFYdNtwxsbtm0MnMRgmA=", "0PqdgNaF09X4IpumBiOU2w==", "LDOgG3QmrIdnh8xlQdT+", "WHr+gr5vzOwXZXzLxv4=", "1HCmeNBTwkgPOjMZues=", "Ey2VG0fZDBIARaZZ", "omKAbliAi+N88WFM", "o8Istv946qZPd/DSVxaBI4qcKDo=", "yJ7urxrQGzh79xww4w==", "gSagOLSM94AnZcIgNHEE7BT4", "Qw4NhuR+4wY8YNlKd/QdAD0o6KjhuZtdtA==", "fpkQmAa5Mc1bbcRlQdT+", "WCBsPKxZzVzxCUvUCwdC1Hc=", "jjsM3i7VLQYqPqEIITscq1fmBgp5Aw==", "RdisRWOCpYiFmQ==", "Hry/mxIQHqRu", "7fuXY96T/ZEkivUHv5X2", "xtp9W9eNjxd/5Oc6RFa1YB5DtQ==", "pMfOU5EWV01pdcMiPlQNWrZT/zQ=", "jUmgKGL5a/tcy0Y19A==", "pkrCW5s1rBqi3FXkFa4A3QGrue9z", "uYslkvGb8iFcy0Y19A==", "S9y7PZ5kwHP1PZLg2vCU3Q==", "DalTG28tlbdvpPQ="]}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
Formbook_1 | autogenerated rule brought to you by yara-signator | Felix Bilstein - yara-signator at cocacoding dot com |
| |
Formbook | detect Formbook in memory | JPCERT/CC Incident Response Group |
| |
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
Click to see the 20 entries |
Persistence and Installation Behavior |
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Source: | Author: Joe Security: |
⊘No Snort rule has matched
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AV Detection |
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Source: | Virustotal: | Perma Link |
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Networking |
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Source: | Network Connect: | Jump to behavior | ||
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