quasar | db5769a8780e6b398f48b33209ba18deb0eefeb0b6df143bb016c1defa718ac5

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
01/06/2024, 19:29

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General

Target
cool.exe
Size 409KB
Sample240601-x7cs1adc77
SHA256 db5769a8780e6b398f48b33209ba18deb0eefeb0b6df143bb016c1defa718ac5
MD5 8981944139c803c067c3a1fe11dc0d88
SHA1 dcc102fba961eaea31a2c218b1f6e4ae2a00c91b
SHA512 668cfa950624ee38e5e0470379b784e14675df4c0f8e75009d28161a88789d3d778a79924d379ab43896d028e94814d582a1c882c5d2918053a320a8e1cc38f5
SSDEEP 6144:rMs9p1kREG60ol2tjSujSyfhQkHwKkcY2b+5oydLJF6qty9fHg5a:jpiREGJBtjSujS1k8hoyM/9fHg5a
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 |

adult-mai.gl.at.ply.gg:51745

Mutex

$Sxr-jy6vh8CtEJL5ceZuIb

Attributes

encryption_key
72dhc0vkceueKRBldQr9
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/1280-1-0x00000000005B0000-0x000000000061C000-memory.dmp	family_quasar
behavioral2/files/0x000400000002a9ff-11.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2732	$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
1	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	cool.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
File created	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	cool.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

pid	Process
4804	schtasks.exe
3516	SCHTASKS.exe
1164	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1280	cool.exe
Token: SeDebugPrivilege	2732	$sxr-powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2732	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 4804	1280	cool.exe	79
PID 1280 wrote to memory of 4804	1280	cool.exe	79
PID 1280 wrote to memory of 4804	1280	cool.exe	79
PID 1280 wrote to memory of 2732	1280	cool.exe	81
PID 1280 wrote to memory of 2732	1280	cool.exe	81
PID 1280 wrote to memory of 2732	1280	cool.exe	81
PID 1280 wrote to memory of 3516	1280	cool.exe	82
PID 1280 wrote to memory of 3516	1280	cool.exe	82
PID 1280 wrote to memory of 3516	1280	cool.exe	82
PID 2732 wrote to memory of 1164	2732	$sxr-powershell.exe	84
PID 2732 wrote to memory of 1164	2732	$sxr-powershell.exe	84
PID 2732 wrote to memory of 1164	2732	$sxr-powershell.exe	84

C:\Users\Admin\AppData\Local\Temp\cool.exe
"C:\Users\Admin\AppData\Local\Temp\cool.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1280
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\cool.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:4804
- 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:2732
- - 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:1164
- C:\Windows\SysWOW64\SCHTASKS.exe
  "SCHTASKS.exe" /create /tn "$77cool.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\cool.exe'" /sc onlogon /rl HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:3516

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 db5769a8780e6b398f48b33209ba18deb0eefeb0b6df143bb016c1defa718ac5
MD5 8981944139c803c067c3a1fe11dc0d88
SHA1 dcc102fba961eaea31a2c218b1f6e4ae2a00c91b
SHA512 668cfa950624ee38e5e0470379b784e14675df4c0f8e75009d28161a88789d3d778a79924d379ab43896d028e94814d582a1c882c5d2918053a320a8e1cc38f5
SSDEEP 6144:rMs9p1kREG60ol2tjSujSyfhQkHwKkcY2b+5oydLJF6qty9fHg5a:jpiREGJBtjSujS1k8hoyM/9fHg5a
MD5 SHA1 SHA512 SSDEEP

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memory/1280-6-0x0000000005DF0000-0x0000000005E02000-memory.dmp

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memory/1280-1-0x00000000005B0000-0x000000000061C000-memory.dmp

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memory/1280-3-0x0000000005110000-0x00000000051A2000-memory.dmp

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memory/1280-4-0x0000000074CA0000-0x0000000075451000-memory.dmp

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memory/1280-5-0x00000000051B0000-0x0000000005216000-memory.dmp

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memory/1280-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

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memory/1280-7-0x0000000006340000-0x000000000637C000-memory.dmp

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memory/1280-2-0x0000000005620000-0x0000000005BC6000-memory.dmp

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memory/1280-16-0x0000000074CA0000-0x0000000075451000-memory.dmp

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memory/2732-14-0x0000000074CA0000-0x0000000075451000-memory.dmp

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memory/2732-13-0x0000000074CA0000-0x0000000075451000-memory.dmp

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memory/2732-18-0x00000000068B0000-0x00000000068BA000-memory.dmp

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memory/2732-19-0x0000000074CA0000-0x0000000075451000-memory.dmp

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memory/2732-20-0x0000000074CA0000-0x0000000075451000-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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