quasar | 6f9865911d6878366ce10e06b5e5a6b04897df18c1c3ebfb73de573467720fb7

Analysis

max time kernel
132s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
06/06/2024, 11:59

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General

Target
svchost.exe
Size 409KB
Sample240606-n58m8aeg85
SHA256 6f9865911d6878366ce10e06b5e5a6b04897df18c1c3ebfb73de573467720fb7
MD5 499ab44b3be0e431ee482c016f423b2f
SHA1 8f3fc11724012b202a6e78211a7bf4e323edb53f
SHA512 54b2612624b4310d8e0c1f571a7b7a10fb2948eed9929b7fed50a8b10155ef10c541e1239c59a75e179c0705b9d27a770f5d37b8c254b00c659f1af3c5d55309
SSDEEP 6144:xMs9p1kREG60olUijSoNDu3MH6FFIUk6SsFbP7UIYQkG19asz6+MQ6M:dpiREGJHijSomjIoft7UIYxGHdmQ6M
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar seroxen | v3.1.5 |spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen | v3.1.5 |

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

resource	yara_rule
behavioral2/memory/3740-1-0x0000000000FF0000-0x000000000105C000-memory.dmp	family_quasar
behavioral2/files/0x0009000000023411-10.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4108	$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.

flow	ioc
12	ip-api.com

Drops file in System32 directory 4 IoCs

description	ioc	Process
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
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

Creates scheduled task(s) 1 TTPs 4 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1660	schtasks.exe
3096	SCHTASKS.exe
2756	schtasks.exe
1316	SCHTASKS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3740	svchost.exe
Token: SeDebugPrivilege	4108	$sxr-powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4108	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3740 wrote to memory of 1660	3740	svchost.exe	87
PID 3740 wrote to memory of 1660	3740	svchost.exe	87
PID 3740 wrote to memory of 1660	3740	svchost.exe	87
PID 3740 wrote to memory of 4108	3740	svchost.exe	89
PID 3740 wrote to memory of 4108	3740	svchost.exe	89
PID 3740 wrote to memory of 4108	3740	svchost.exe	89
PID 3740 wrote to memory of 3096	3740	svchost.exe	90
PID 3740 wrote to memory of 3096	3740	svchost.exe	90
PID 3740 wrote to memory of 3096	3740	svchost.exe	90
PID 4108 wrote to memory of 2756	4108	$sxr-powershell.exe	94
PID 4108 wrote to memory of 2756	4108	$sxr-powershell.exe	94
PID 4108 wrote to memory of 2756	4108	$sxr-powershell.exe	94
PID 4108 wrote to memory of 1316	4108	$sxr-powershell.exe	113
PID 4108 wrote to memory of 1316	4108	$sxr-powershell.exe	113
PID 4108 wrote to memory of 1316	4108	$sxr-powershell.exe	113

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:3740
- 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:1660
- 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:4108
- - 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:2756
- - C:\Windows\SysWOW64\SCHTASKS.exe
    "SCHTASKS.exe" /create /tn "$77$sxr-powershell.exe" /tr "'C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe'" /sc onlogon /rl HIGHEST
    3⤵
    - Creates scheduled task(s)
    PID:1316
- 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:3096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

$sxr-powershell.exe

Path C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe
Size 409KB
SHA256 6f9865911d6878366ce10e06b5e5a6b04897df18c1c3ebfb73de573467720fb7
MD5 499ab44b3be0e431ee482c016f423b2f
SHA1 8f3fc11724012b202a6e78211a7bf4e323edb53f
SHA512 54b2612624b4310d8e0c1f571a7b7a10fb2948eed9929b7fed50a8b10155ef10c541e1239c59a75e179c0705b9d27a770f5d37b8c254b00c659f1af3c5d55309
SSDEEP 6144:xMs9p1kREG60olUijSoNDu3MH6FFIUk6SsFbP7UIYQkG19asz6+MQ6M:dpiREGJHijSomjIoft7UIYxGHdmQ6M
MD5 SHA1 SHA512 SSDEEP

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memory/3740-6-0x0000000007180000-0x00000000071BC000-memory.dmp

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memory/3740-2-0x00000000065B0000-0x0000000006B54000-memory.dmp

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memory/3740-3-0x00000000060A0000-0x0000000006132000-memory.dmp

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memory/3740-4-0x0000000006140000-0x00000000061A6000-memory.dmp

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memory/3740-5-0x0000000006D60000-0x0000000006D72000-memory.dmp

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memory/3740-0-0x00000000749CE000-0x00000000749CF000-memory.dmp

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memory/3740-1-0x0000000000FF0000-0x000000000105C000-memory.dmp

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memory/4108-12-0x00000000749C0000-0x0000000075170000-memory.dmp

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memory/4108-13-0x00000000749C0000-0x0000000075170000-memory.dmp

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memory/4108-16-0x0000000006B00000-0x0000000006B0A000-memory.dmp

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memory/4108-17-0x00000000749C0000-0x0000000075170000-memory.dmp

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memory/4108-18-0x00000000749C0000-0x0000000075170000-memory.dmp

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memory/4108-20-0x00000000749C0000-0x0000000075170000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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