| File name: | Cortana.exe |
| Full analysis: | https://app.any.run/tasks/e43eb692-d32a-45f0-8a5b-1445a1df82de |
| Verdict: | Malicious activity |
| Threats: | Remote access trojans (RATs) are a type of malware that enables attackers to establish complete to partial control over infected computers. Such malicious programs often have a modular design, offering a wide range of functionalities for conducting illicit activities on compromised systems. Some of the most common features of RATs include access to the users’ data, webcam, and keystrokes. This malware is often distributed through phishing emails and links. |
| Analysis date: | November 15, 2018, 14:05:48 |
| OS: | Windows 7 Professional Service Pack 1 (build: 7601, 32 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32 executable (GUI) Intel 80386, for MS Windows |
| MD5: | 4598F18854719507599B01DC4B529C71 |
| SHA1: | FEA6AEFA44D32DD496DA82F6711ABDF6E8B130F7 |
| SHA256: | AD63DF9DF046DE2D07EF32719581FA2E588DA9F566C02414ADD80AB0CEA2E507 |
| SSDEEP: | 12288:71yaZVDB9UHQf8OZy3RB6G7q9emmXCpniMWmUue:ka/d0OZi6GkRhnitZue |
MALICIOUS
Changes the autorun value in the registry
- Cortana.exe (PID: 2472)
- Microsoft Audio Card.exe (PID: 1968)
Runs PING.EXE for delay simulation
- cmd.exe (PID: 3424)
REMCOS RAT was detected
- Microsoft Audio Card.exe (PID: 1968)
SUSPICIOUS
Application launched itself
- Cortana.exe (PID: 2824)
- Cortana.exe (PID: 3032)
- Cortana.exe (PID: 2260)
- Microsoft Audio Card.exe (PID: 3192)
Creates files in the user directory
- Cortana.exe (PID: 2472)
- Microsoft Audio Card.exe (PID: 1968)
Connects to unusual port
- Microsoft Audio Card.exe (PID: 1968)
Executable content was dropped or overwritten
- Cortana.exe (PID: 2472)
Starts CMD.EXE for commands execution
- Cortana.exe (PID: 2472)
INFO
No info indicators.
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Win32 Executable Delphi generic (37.4) |
|---|---|---|
| .scr | | | Windows screen saver (34.5) |
| .exe | | | Win32 Executable (generic) (11.9) |
| .exe | | | Win16/32 Executable Delphi generic (5.4) |
| .exe | | | Generic Win/DOS Executable (5.2) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 1992:02:21 08:56:35+01:00 |
| PEType: | PE32 |
| LinkerVersion: | 2.25 |
| CodeSize: | 411648 |
| InitializedDataSize: | 170496 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x65748 |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 21-Feb-1992 07:56:35 |
| Detected languages: |
|
DOS Header
| Magic number: | MZ |
|---|---|
| Bytes on last page of file: | 0x0050 |
| Pages in file: | 0x0002 |
| Relocations: | 0x0000 |
| Size of header: | 0x0004 |
| Min extra paragraphs: | 0x000F |
| Max extra paragraphs: | 0xFFFF |
| Initial SS value: | 0x0000 |
| Initial SP value: | 0x00B8 |
| Checksum: | 0x0000 |
| Initial IP value: | 0x0000 |
| Initial CS value: | 0x0000 |
| Overlay number: | 0x001A |
| OEM identifier: | 0x0000 |
| OEM information: | 0x0000 |
| Address of NE header: | 0x00000100 |
PE Headers
| Signature: | PE |
|---|---|
| Machine: | IMAGE_FILE_MACHINE_I386 |
| Number of sections: | 8 |
| Time date stamp: | 21-Feb-1992 07:56:35 |
| Pointer to Symbol Table: | 0x00000000 |
| Number of symbols: | 0 |
| Size of Optional Header: | 0x00E0 |
| Characteristics: |
|
Sections
Name | Virtual Address | Virtual Size | Raw Size | Charateristics | Entropy |
|---|---|---|---|---|---|
CODE | 0x00001000 | 0x00064790 | 0x00064800 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 6.61788 |
DATA | 0x00066000 | 0x000012E4 | 0x00001400 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 3.93556 |
BSS | 0x00068000 | 0x00000CFD | 0x00000000 | IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 0 |
.idata | 0x00069000 | 0x00002204 | 0x00002400 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 4.87267 |
.tls | 0x0006C000 | 0x00000010 | 0x00000000 | IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 0 |
.rdata | 0x0006D000 | 0x00000018 | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_SHARED | 0.200582 |
.reloc | 0x0006E000 | 0x00007098 | 0x00007200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_SHARED | 6.62997 |
.rsrc | 0x00076000 | 0x0001EC08 | 0x0001EE00 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_SHARED | 7.07949 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 2.87102 | 744 | Latin 1 / Western European | English - United States | RT_ICON |
2 | 2.80231 | 308 | Latin 1 / Western European | UNKNOWN | RT_CURSOR |
3 | 3.00046 | 308 | Latin 1 / Western European | UNKNOWN | RT_CURSOR |
4 | 2.56318 | 308 | Latin 1 / Western European | UNKNOWN | RT_CURSOR |
5 | 2.6949 | 308 | Latin 1 / Western European | UNKNOWN | RT_CURSOR |
6 | 2.62527 | 308 | Latin 1 / Western European | UNKNOWN | RT_CURSOR |
7 | 2.91604 | 308 | Latin 1 / Western European | UNKNOWN | RT_CURSOR |
898 | 5.59405 | 971 | Latin 1 / Western European | English - United States | RT_BITMAP |
899 | 4.05869 | 971 | Latin 1 / Western European | English - United States | RT_BITMAP |
900 | 4.05869 | 971 | Latin 1 / Western European | English - United States | RT_BITMAP |
Imports
advapi32.dll |
comctl32.dll |
comdlg32.dll |
gdi32.dll |
kernel32.dll |
oleaut32.dll |
user32.dll |
version.dll |
Total processes
42
Monitored processes
11
Malicious processes
5
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 920 | PING 127.0.0.1 -n 2 | C:\Windows\system32\PING.EXE | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: TCP/IP Ping Command Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1968 | "C:\Users\admin\AppData\Roaming\Microsoft Audio Card\Microsoft Audio Card.exe" | C:\Users\admin\AppData\Roaming\Microsoft Audio Card\Microsoft Audio Card.exe | Microsoft Audio Card.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 2260 | "C:\Users\admin\AppData\Local\Temp\Cortana.exe" 2 2472 6144750 | C:\Users\admin\AppData\Local\Temp\Cortana.exe | — | Cortana.exe | |||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 2472 | "C:\Users\admin\AppData\Local\Temp\Cortana.exe" | C:\Users\admin\AppData\Local\Temp\Cortana.exe | Cortana.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 2824 | "C:\Users\admin\AppData\Local\Temp\Cortana.exe" | C:\Users\admin\AppData\Local\Temp\Cortana.exe | — | Cortana.exe | |||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 3032 | "C:\Users\admin\AppData\Local\Temp\Cortana.exe" | C:\Users\admin\AppData\Local\Temp\Cortana.exe | — | explorer.exe | |||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 3192 | "C:\Users\admin\AppData\Roaming\Microsoft Audio Card\Microsoft Audio Card.exe" | C:\Users\admin\AppData\Roaming\Microsoft Audio Card\Microsoft Audio Card.exe | — | cmd.exe | |||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 3292 | "C:\Users\admin\AppData\Local\Temp\Cortana.exe" 2 3308 6173828 | C:\Users\admin\AppData\Local\Temp\Cortana.exe | — | Cortana.exe | |||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 3308 | "C:\Users\admin\AppData\Local\Temp\Cortana.exe" | C:\Users\admin\AppData\Local\Temp\Cortana.exe | — | Cortana.exe | |||||||||||
User: admin Integrity Level: MEDIUM Exit code: 1 Modules
| |||||||||||||||
| 3424 | cmd /c ""C:\Users\admin\AppData\Local\Temp\install.bat" " | C:\Windows\system32\cmd.exe | — | Cortana.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 1 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) Modules
| |||||||||||||||
Total events
359
Read events
352
Write events
7
Delete events
0
Modification events
| (PID) Process: | (2472) Cortana.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | Microsoft Audio Card |
Value: "C:\Users\admin\AppData\Roaming\Microsoft Audio Card\Microsoft Audio Card.exe" | |||
| (PID) Process: | (2472) Cortana.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 0 | |||
| (PID) Process: | (2472) Cortana.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 1 | |||
| (PID) Process: | (1968) Microsoft Audio Card.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | Microsoft Audio Card |
Value: "C:\Users\admin\AppData\Roaming\Microsoft Audio Card\Microsoft Audio Card.exe" | |||
| (PID) Process: | (1968) Microsoft Audio Card.exe | Key: | HKEY_CURRENT_USER\Software\remcos_oqlxkkqqqelvgln |
| Operation: | write | Name: | EXEpath |
Value: î¿'ØÕ+Û¯!ÐÖ«”?Y =¨¢Ôu_ì®ü, œPXðæ€~ÂÄÁ:³Â“V1+6¨ mvùì½ Ó†Ò¿Ü†j&$Ð )D§ù8 | |||
Executable files
1
Suspicious files
0
Text files
2
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 2472 | Cortana.exe | C:\Users\admin\AppData\Local\Temp\install.bat | text | |
MD5:— | SHA256:— | |||
| 1968 | Microsoft Audio Card.exe | C:\Users\admin\AppData\Roaming\remcos\logs.dat | text | |
MD5:— | SHA256:— | |||
| 2472 | Cortana.exe | C:\Users\admin\AppData\Roaming\Microsoft Audio Card\Microsoft Audio Card.exe | executable | |
MD5:— | SHA256:— | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
39
DNS requests
0
Threats
0
HTTP requests
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
1968 | Microsoft Audio Card.exe | 31.171.152.104:143 | — | Keminet Ltd. | AL | malicious |