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File name:

csrss.exe

Full analysis: https://app.any.run/tasks/cebd9e47-9f57-457c-8e31-f43aae0d66f8
Verdict: Malicious activity
Threats:

Quasar is a very popular RAT in the world thanks to its code being available in open-source. This malware can be used to control the victim’s computer remotely.

Analysis date: March 21, 2019, 15:21:01
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
evasion
trojan
rat
quasar
virus
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386, for MS Windows
MD5:

1702EC9EE5F0B96169FEAA299D116B0C

SHA1:

2E16C0C4DB50EC7E781AC0F0CF3F7FBA8C8D49A4

SHA256:

27C8E82152F2E6FB820A43D00A1DB17B04BD9210CC35D2157F6A80D38B061BCA

SSDEEP:

12288:lrg1oKbWdecWhjzEbcrPIcd+h7vVmgCxksjrdrZ116EStU4iO/htDNNbBujZtXQ:By/O7Wa8PF0nEXj116XtiO5tnbBOQ

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.
  • MALICIOUS

    • QUASAR was detected

      • csrss.exe (PID: 2096)
  • SUSPICIOUS

    • Checks for external IP

      • csrss.exe (PID: 2096)
    • Application launched itself

      • csrss.exe (PID: 588)
  • INFO

    No info indicators.
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

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: 1992:04:08 17:43:39+02:00
PEType: PE32
LinkerVersion: 2.25
CodeSize: 499712
InitializedDataSize: 622592
UninitializedDataSize: -
EntryPoint: 0x7af84
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 08-Apr-1992 15:43:39
Detected languages:
  • English - United States

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: 08-Apr-1992 15:43:39
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_32BIT_MACHINE
  • IMAGE_FILE_BYTES_REVERSED_HI
  • IMAGE_FILE_BYTES_REVERSED_LO
  • IMAGE_FILE_EXECUTABLE_IMAGE
  • IMAGE_FILE_LINE_NUMS_STRIPPED
  • IMAGE_FILE_LOCAL_SYMS_STRIPPED

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
CODE
0x00001000
0x00079FCC
0x0007A000
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.54919
DATA
0x0007B000
0x0000F2EC
0x0000F400
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
3.39797
BSS
0x0008B000
0x00000EED
0x00000000
IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
0
.idata
0x0008C000
0x00002544
0x00002600
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
4.9886
.tls
0x0008F000
0x00000010
0x00000000
IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
0
.rdata
0x00090000
0x00000018
0x00000200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_SHARED
0.191963
.reloc
0x00091000
0x00009780
0x00009800
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_SHARED
6.64943
.rsrc
0x0009B000
0x0007CA8C
0x0007CC00
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_SHARED
7.15465

Resources

Title
Entropy
Size
Codepage
Language
Type
1
2.6633
308
Latin 1 / Western European
UNKNOWN
RT_CURSOR
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
1000
5.11605
163
Latin 1 / Western European
English - United States
RT_STRING
1091
7.35273
5899
Latin 1 / Western European
English - United States
RT_BITMAP
1092
7.49201
5899
Latin 1 / Western European
English - United States
RT_BITMAP

Imports

advapi32.dll
comctl32.dll
comdlg32.dll
gdi32.dll
kernel32.dll
ole32.dll
oleaut32.dll
user32.dll
version.dll
No data.
screenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
32
Monitored processes
2
Malicious processes
1
Suspicious processes
1

Behavior graph

Click at the process to see the details
start csrss.exe no specs #QUASAR csrss.exe

Process information

PID
CMD
Path
Indicators
Parent process
588"C:\Users\admin\AppData\Local\Temp\csrss.exe" C:\Users\admin\AppData\Local\Temp\csrss.exeexplorer.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
2096"C:\Users\admin\AppData\Local\Temp\csrss.exe" C:\Users\admin\AppData\Local\Temp\csrss.exe
csrss.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Total events
46
Read events
34
Write events
12
Delete events
0

Modification events

(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASAPI32
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASAPI32
Operation:writeName:EnableConsoleTracing
Value:
0
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASAPI32
Operation:writeName:FileTracingMask
Value:
4294901760
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASAPI32
Operation:writeName:ConsoleTracingMask
Value:
4294901760
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASAPI32
Operation:writeName:MaxFileSize
Value:
1048576
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASAPI32
Operation:writeName:FileDirectory
Value:
%windir%\tracing
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASMANCS
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASMANCS
Operation:writeName:EnableConsoleTracing
Value:
0
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASMANCS
Operation:writeName:FileTracingMask
Value:
4294901760
(PID) Process:(2096) csrss.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\csrss_RASMANCS
Operation:writeName:ConsoleTracingMask
Value:
4294901760
Executable files
0
Suspicious files
0
Text files
0
Unknown types
0

Dropped files

No data
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
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2096
csrss.exe
GET
200
185.194.141.58:80
http://ip-api.com/json/
DE
text
253 b
shared
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
2096
csrss.exe
185.194.141.58:80
ip-api.com
netcup GmbH
DE
unknown

DNS requests

Domain
IP
Reputation
ip-api.com
  • 185.194.141.58
shared

Threats

PID
Process
Class
Message
2096
csrss.exe
Potential Corporate Privacy Violation
ET POLICY External IP Lookup ip-api.com
2096
csrss.exe
A Network Trojan was detected
MALWARE [PTsecurity] Quasar 1.3 RAT IP Lookup ip-api.com (HTTP headeer)
1 ETPRO signatures available at the full report
No debug info