quasar | 6f9865911d6878366ce10e06b5e5a6b04897df18c1c3ebfb73de573467720fb7

General

Target

svchost.exe
Size

409KB
MD5

499ab44b3be0e431ee482c016f423b2f
SHA1

8f3fc11724012b202a6e78211a7bf4e323edb53f
SHA256

6f9865911d6878366ce10e06b5e5a6b04897df18c1c3ebfb73de573467720fb7
SHA512

54b2612624b4310d8e0c1f571a7b7a10fb2948eed9929b7fed50a8b10155ef10c541e1239c59a75e179c0705b9d27a770f5d37b8c254b00c659f1af3c5d55309
SSDEEP

6144:xMs9p1kREG60olUijSoNDu3MH6FFIUk6SsFbP7UIYQkG19asz6+MQ6M:dpiREGJHijSomjIoft7UIYxGHdmQ6M

Score

10^/10

quasar seroxen | v3.1.5 |spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen | v3.1.5 |

C2

dating-mpegs.gl.at.ply.gg:6566

Mutex

$Sxr-jy6vh8CtEJL5ceZuIb

Attributes

encryption_key
Nj2uU7r8zbApMgWfD7rz
install_name
$sxr-powershell.exe
log_directory
$sxr-Logs
reconnect_delay
3000
startup_key
Powershell
subdirectory
$sxr-seroxen2

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/4848-1-0x0000000000500000-0x000000000056C000-memory.dmp	family_quasar
C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

$sxr-powershell.exe

pid process

4852 $sxr-powershell.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

22 ip-api.com

pid	process
4852	$sxr-powershell.exe

flow	ioc
22	ip-api.com

Drops file in System32 directory 4 IoCs

Processes:

svchost.exe$sxr-powershell.exe

description	ioc	process
File created	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	$sxr-powershell.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2	$sxr-powershell.exe

Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeSCHTASKS.exeschtasks.exe

pid process

2928 schtasks.exe
2592 SCHTASKS.exe
4144 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

svchost.exe$sxr-powershell.exe

description pid process

Token: SeDebugPrivilege 4848 svchost.exe
Token: SeDebugPrivilege 4852 $sxr-powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

$sxr-powershell.exe

pid process

4852 $sxr-powershell.exe

pid	process
2928	schtasks.exe
2592	SCHTASKS.exe
4144	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	4848	svchost.exe
Token: SeDebugPrivilege	4852	$sxr-powershell.exe

pid	process
4852	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

svchost.exe$sxr-powershell.exe

description	pid	process	target process
PID 4848 wrote to memory of 2928	4848	svchost.exe	schtasks.exe
PID 4848 wrote to memory of 2928	4848	svchost.exe	schtasks.exe
PID 4848 wrote to memory of 2928	4848	svchost.exe	schtasks.exe
PID 4848 wrote to memory of 4852	4848	svchost.exe	$sxr-powershell.exe
PID 4848 wrote to memory of 4852	4848	svchost.exe	$sxr-powershell.exe
PID 4848 wrote to memory of 4852	4848	svchost.exe	$sxr-powershell.exe
PID 4848 wrote to memory of 2592	4848	svchost.exe	SCHTASKS.exe
PID 4848 wrote to memory of 2592	4848	svchost.exe	SCHTASKS.exe
PID 4848 wrote to memory of 2592	4848	svchost.exe	SCHTASKS.exe
PID 4852 wrote to memory of 4144	4852	$sxr-powershell.exe	schtasks.exe
PID 4852 wrote to memory of 4144	4852	$sxr-powershell.exe	schtasks.exe
PID 4852 wrote to memory of 4144	4852	$sxr-powershell.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4848

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2928

C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe
"C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe"
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4852

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:4144

C:\Windows\SysWOW64\SCHTASKS.exe
"SCHTASKS.exe" /create /tn "$77svchost.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\svchost.exe'" /sc onlogon /rl HIGHEST
2⤵
- Creates scheduled task(s)
PID:2592

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe
Filesize
409KB

MD5
499ab44b3be0e431ee482c016f423b2f

SHA1
8f3fc11724012b202a6e78211a7bf4e323edb53f

SHA256
6f9865911d6878366ce10e06b5e5a6b04897df18c1c3ebfb73de573467720fb7

SHA512
54b2612624b4310d8e0c1f571a7b7a10fb2948eed9929b7fed50a8b10155ef10c541e1239c59a75e179c0705b9d27a770f5d37b8c254b00c659f1af3c5d55309

Download Submit
memory/4848-6-0x00000000067D0000-0x000000000680C000-memory.dmp

Filesize
240KB

Download
memory/4848-2-0x0000000005BB0000-0x0000000006154000-memory.dmp

Filesize
5.6MB

Download
memory/4848-3-0x00000000056B0000-0x0000000005742000-memory.dmp

Filesize
584KB

Download
memory/4848-4-0x0000000005750000-0x00000000057B6000-memory.dmp

Filesize
408KB

Download
memory/4848-5-0x00000000063B0000-0x00000000063C2000-memory.dmp

Filesize
72KB

Download
memory/4848-0-0x0000000074E3E000-0x0000000074E3F000-memory.dmp

Filesize
4KB

Download
memory/4848-1-0x0000000000500000-0x000000000056C000-memory.dmp

Filesize
432KB

Download
memory/4852-12-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/4852-13-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/4852-16-0x0000000006560000-0x000000000656A000-memory.dmp

Filesize
40KB

Download
memory/4852-19-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download
memory/4852-20-0x0000000074E30000-0x00000000755E0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads