quasar | c4f4b783e9b152a00d5cac8b82d2ae0c74fa848aaa4a524dc5cb81b1576aaab5

Analysis

max time kernel
280s
max time network
296s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 06:17

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General

Target
uni/Uni - Copy (4).exe
Size 409KB
Sample240602-g2eseaea88
SHA256 51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246
MD5 b70fdac25a99501e3cae11f1b775249e
SHA1 3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71
SHA512 43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44
SSDEEP 12288:gpbJjGut6AoE3hVVdFaC/eZPTMTDlpgfJCKuMsVs:oVaurMLcDlpRKai
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar seroxen spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen

panel-slave.gl.at.ply.gg:57059
panel-slave.gl.at.ply.gg:27892

Mutex

$Sxr-rpL8EItHN3pqIQQVy2

Attributes

encryption_key
Lme7VBS3l58VwLM69PNM
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
SeroXen
subdirectory
SubDir

Signatures

Quasar RAT 5 IoCs

Quasar is an open source Remote Access Tool.

trojan spyware quasar

flow	ioc	pid	Process
		1472	schtasks.exe
5	ip-api.com		Process not Found
34	api.ipify.org		Process not Found
83	ip-api.com		Process not Found
87	api.ipify.org		Process not Found

Quasar payload 2 IoCs

resource	yara_rule
behavioral6/memory/2388-1-0x0000000000AD0000-0x0000000000B3C000-memory.dmp	family_quasar
behavioral6/files/0x0009000000023351-10.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4488	Client.exe

Looks up external IP address via web service 4 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
5	ip-api.com
34	api.ipify.org
83	ip-api.com
87	api.ipify.org

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
1472	schtasks.exe
400	SCHTASKS.exe
4024	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	Uni - Copy (4).exe
Token: SeDebugPrivilege	4488	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4488	Client.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 1472	2388	Uni - Copy (4).exe	94
PID 2388 wrote to memory of 1472	2388	Uni - Copy (4).exe	94
PID 2388 wrote to memory of 1472	2388	Uni - Copy (4).exe	94
PID 2388 wrote to memory of 4488	2388	Uni - Copy (4).exe	96
PID 2388 wrote to memory of 4488	2388	Uni - Copy (4).exe	96
PID 2388 wrote to memory of 4488	2388	Uni - Copy (4).exe	96
PID 2388 wrote to memory of 400	2388	Uni - Copy (4).exe	97
PID 2388 wrote to memory of 400	2388	Uni - Copy (4).exe	97
PID 2388 wrote to memory of 400	2388	Uni - Copy (4).exe	97
PID 4488 wrote to memory of 4024	4488	Client.exe	99
PID 4488 wrote to memory of 4024	4488	Client.exe	99
PID 4488 wrote to memory of 4024	4488	Client.exe	99

C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (4).exe
"C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (4).exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (4).exe" /rl HIGHEST /f
  2⤵
  - Quasar RAT
  - Creates scheduled task(s)
  PID:1472
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "SeroXen" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4024
- C:\Windows\SysWOW64\SCHTASKS.exe
  "SCHTASKS.exe" /create /tn "$77Uni - Copy (4).exe" /tr "'C:\Users\Admin\AppData\Local\Temp\uni\Uni - Copy (4).exe'" /sc onlogon /rl HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:400

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

Client.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Size 409KB
SHA256 51ff3eb450a786c1aaa75ff889f2fd256412a7b75d04277fdf9fcccc20e57246
MD5 b70fdac25a99501e3cae11f1b775249e
SHA1 3c59226479bfdcd1b2927bcfb1a7516d4cb8dd71
SHA512 43f0d5d6e5f0d5febba537c109ffdbc250bbb6e9725e635a43ec975b0353048eaeee50b6e9274cd5e072ea6b0cea32439bd37408b2528832f467f2075f74ca44
SSDEEP 12288:gpbJjGut6AoE3hVVdFaC/eZPTMTDlpgfJCKuMsVs:oVaurMLcDlpRKai
MD5 SHA1 SHA512 SSDEEP

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memory/2388-6-0x0000000006270000-0x0000000006282000-memory.dmp

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memory/2388-2-0x0000000005A80000-0x0000000006024000-memory.dmp

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memory/2388-3-0x0000000005570000-0x0000000005602000-memory.dmp

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memory/2388-4-0x0000000074510000-0x0000000074CC0000-memory.dmp

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memory/2388-5-0x0000000005610000-0x0000000005676000-memory.dmp

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memory/2388-0-0x000000007451E000-0x000000007451F000-memory.dmp

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memory/2388-1-0x0000000000AD0000-0x0000000000B3C000-memory.dmp

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memory/2388-15-0x0000000074510000-0x0000000074CC0000-memory.dmp

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memory/4488-12-0x0000000074510000-0x0000000074CC0000-memory.dmp

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memory/4488-13-0x0000000074510000-0x0000000074CC0000-memory.dmp

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memory/4488-17-0x00000000073E0000-0x00000000073EA000-memory.dmp

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memory/4488-18-0x0000000074510000-0x0000000074CC0000-memory.dmp

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memory/4488-19-0x0000000074510000-0x0000000074CC0000-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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