quasar | a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7v20201028
submitted
28-02-2021 07:18

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General

Target

a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe
Size

1.2MB
MD5

b7c64961404b11332ce76a067eb3d1d0
SHA1

7781a5b8c7d8f318514188d67b50000bcd022dfc
SHA256

a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452
SHA512

72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Score

10^/10

quasar persistence spyware trojan

Malware Config

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Executes dropped EXE 2 IoCs

Processes:

wsapx.exewsapx.exe

pid process

752 wsapx.exe
1584 wsapx.exe

pid	process
752	wsapx.exe
1584	wsapx.exe

Loads dropped DLL 6 IoCs

Processes:

a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exeWerFault.exe

pid	process
1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe
1588	WerFault.exe
1588	WerFault.exe
1588	WerFault.exe
1588	WerFault.exe
1588	WerFault.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wsapx.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\wsapx = "\"C:\\Users\\Admin\\AppData\\Roaming\\SubDir\\wsapx.exe\""	wsapx.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1588 752 WerFault.exe wsapx.exe
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1500 schtasks.exe
1764 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1008 PING.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

1588 WerFault.exe
1588 WerFault.exe
1588 WerFault.exe
1588 WerFault.exe
1588 WerFault.exe

flow	ioc
4	ip-api.com

pid	pid_target	process	target process
1588	752	WerFault.exe	wsapx.exe

pid	process
1500	schtasks.exe
1764	schtasks.exe

pid	process
1008	PING.EXE

pid	process
1588	WerFault.exe
1588	WerFault.exe
1588	WerFault.exe
1588	WerFault.exe
1588	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exewsapx.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe
Token: SeDebugPrivilege	752	wsapx.exe
Token: SeDebugPrivilege	1588	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wsapx.exe

pid process

752 wsapx.exe

pid	process
752	wsapx.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exewsapx.execmd.exe

description	pid	process	target process
PID 1040 wrote to memory of 1500	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	schtasks.exe
PID 1040 wrote to memory of 1500	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	schtasks.exe
PID 1040 wrote to memory of 1500	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	schtasks.exe
PID 1040 wrote to memory of 1500	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	schtasks.exe
PID 1040 wrote to memory of 752	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	wsapx.exe
PID 1040 wrote to memory of 752	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	wsapx.exe
PID 1040 wrote to memory of 752	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	wsapx.exe
PID 1040 wrote to memory of 752	1040	a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe	wsapx.exe
PID 752 wrote to memory of 1764	752	wsapx.exe	schtasks.exe
PID 752 wrote to memory of 1764	752	wsapx.exe	schtasks.exe
PID 752 wrote to memory of 1764	752	wsapx.exe	schtasks.exe
PID 752 wrote to memory of 1764	752	wsapx.exe	schtasks.exe
PID 752 wrote to memory of 692	752	wsapx.exe	cmd.exe
PID 752 wrote to memory of 692	752	wsapx.exe	cmd.exe
PID 752 wrote to memory of 692	752	wsapx.exe	cmd.exe
PID 752 wrote to memory of 692	752	wsapx.exe	cmd.exe
PID 692 wrote to memory of 1704	692	cmd.exe	chcp.com
PID 692 wrote to memory of 1704	692	cmd.exe	chcp.com
PID 692 wrote to memory of 1704	692	cmd.exe	chcp.com
PID 692 wrote to memory of 1704	692	cmd.exe	chcp.com
PID 692 wrote to memory of 1008	692	cmd.exe	PING.EXE
PID 692 wrote to memory of 1008	692	cmd.exe	PING.EXE
PID 692 wrote to memory of 1008	692	cmd.exe	PING.EXE
PID 692 wrote to memory of 1008	692	cmd.exe	PING.EXE
PID 752 wrote to memory of 1588	752	wsapx.exe	WerFault.exe
PID 752 wrote to memory of 1588	752	wsapx.exe	WerFault.exe
PID 752 wrote to memory of 1588	752	wsapx.exe	WerFault.exe
PID 752 wrote to memory of 1588	752	wsapx.exe	WerFault.exe
PID 692 wrote to memory of 1584	692	cmd.exe	wsapx.exe
PID 692 wrote to memory of 1584	692	cmd.exe	wsapx.exe
PID 692 wrote to memory of 1584	692	cmd.exe	wsapx.exe
PID 692 wrote to memory of 1584	692	cmd.exe	wsapx.exe

C:\Users\Admin\AppData\Local\Temp\a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe
"C:\Users\Admin\AppData\Local\Temp\a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1040

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "wsapx" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1500

C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
"C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:752

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "wsapx" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1764

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\fHwC3ehSt55G.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:692

C:\Windows\SysWOW64\chcp.com
chcp 65001
4⤵
PID:1704

C:\Windows\SysWOW64\PING.EXE
ping -n 10 localhost
4⤵
- Runs ping.exe
PID:1008

C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
"C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe"
4⤵
- Executes dropped EXE
PID:1584

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 752 -s 1432
3⤵
- Loads dropped DLL
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1588

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Remote System Discovery

T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\fHwC3ehSt55G.bat
MD5
c5644f4e9a82863f06792c01cb23f310

SHA1
b26be7fe7d97b08d5e4e237be1f60d66f5372c6f

SHA256
f214f581f0f6a96450b440e2c6d4acc24b2184be0ead6f1a347fae53e97475f4

SHA512
83d665d87b1cdbd896d1c8010967c86a2b1f1daa0af5b3b48d0536dd25d94d8d1870df66fd30cc25ed7c24b5e1ef0cca3c31005fd7f0147cb8811285848ebfaa

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
\Users\Admin\AppData\Roaming\SubDir\wsapx.exe
MD5
b7c64961404b11332ce76a067eb3d1d0

SHA1
7781a5b8c7d8f318514188d67b50000bcd022dfc

SHA256
a73eec95b2d0ed2fc3f2185b994f36e3b65963c4cfcb9328716de159d41f2452

SHA512
72a07e85e05fa84aea2e7c691a42e2e4361ab2440520122e3b5d25ad79c66b8ee04db5172cc33e67083ece276504573513d3f84d76afc91e406ed9b17025d6c6

Download Submit
memory/692-18-0x0000000000000000-mapping.dmp

Download
memory/752-16-0x0000000000290000-0x0000000000291000-memory.dmp

Filesize
4KB

Download
memory/752-13-0x0000000001390000-0x0000000001391000-memory.dmp

Filesize
4KB

Download
memory/752-12-0x00000000745B0000-0x0000000074C9E000-memory.dmp

Filesize
6.9MB

Download
memory/752-9-0x0000000000000000-mapping.dmp

Download
memory/1008-21-0x0000000000000000-mapping.dmp

Download
memory/1040-6-0x0000000000A60000-0x0000000000A70000-memory.dmp

Filesize
64KB

Download
memory/1040-2-0x00000000745B0000-0x0000000074C9E000-memory.dmp

Filesize
6.9MB

Download
memory/1040-3-0x0000000000C00000-0x0000000000C01000-memory.dmp

Filesize
4KB

Download
memory/1040-5-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

Filesize
4KB

Download
memory/1500-7-0x0000000000000000-mapping.dmp

Download
memory/1584-36-0x0000000004CC0000-0x0000000004CC1000-memory.dmp

Filesize
4KB

Download
memory/1584-30-0x0000000000000000-mapping.dmp

Download
memory/1584-32-0x00000000745B0000-0x0000000074C9E000-memory.dmp

Filesize
6.9MB

Download
memory/1588-22-0x0000000000000000-mapping.dmp

Download
memory/1588-29-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/1588-23-0x0000000002350000-0x0000000002361000-memory.dmp

Filesize
68KB

Download
memory/1704-20-0x0000000000000000-mapping.dmp

Download
memory/1764-17-0x0000000000000000-mapping.dmp

Download