quasar | b6bb8a533c77034b0d4eab34ffa434b1a999cac5f59983680d222f04e437729d

General

Target

0x0008000000016031-17.exe
Size

3.1MB
MD5

7776335b8b0d230370ca39602c484a69
SHA1

7705fb56ea438e609a6094bef10bdb2392f55719
SHA256

b6bb8a533c77034b0d4eab34ffa434b1a999cac5f59983680d222f04e437729d
SHA512

0e290749b442e317fe90591a43549a003d7f95c086d220b04eae018209a9785a1754b834d529a5839b15d2aa783edd17e52f4ab2b331e3a14c47d84ebf24899d
SSDEEP

49152:2vAt62XlaSFNWPjljiFa2RoUYI4MxNESEWk/imLoGdcTHHB72eh2NT:2vs62XlaSFNWPjljiFXRoUYI3xVo

Score

10^/10

quasar svchost 3 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost 3

C2

41.216.183.179:3742

Mutex

11b8b70b-ab15-4aab-8132-3e7b18b2b48b

Attributes

encryption_key
0325CE0E85B5B8870BB69FE8C81088DBCBFAC6F7
install_name
startui.exe
log_directory
Logs
reconnect_delay
3000
startup_key
startui
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2520-1-0x00000000002D0000-0x00000000005F4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016d06-6.dat	family_quasar
behavioral1/memory/1664-10-0x0000000000D60000-0x0000000001084000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1664	startui.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\SubDir	0x0008000000016031-17.exe
File opened for modification	C:\Program Files\SubDir\startui.exe	startui.exe
File opened for modification	C:\Program Files\SubDir	startui.exe
File created	C:\Program Files\SubDir\startui.exe	0x0008000000016031-17.exe
File opened for modification	C:\Program Files\SubDir\startui.exe	0x0008000000016031-17.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2304	schtasks.exe
2936	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	0x0008000000016031-17.exe
Token: SeDebugPrivilege	1664	startui.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1664	startui.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2304	2520	0x0008000000016031-17.exe	30
PID 2520 wrote to memory of 2304	2520	0x0008000000016031-17.exe	30
PID 2520 wrote to memory of 2304	2520	0x0008000000016031-17.exe	30
PID 2520 wrote to memory of 1664	2520	0x0008000000016031-17.exe	32
PID 2520 wrote to memory of 1664	2520	0x0008000000016031-17.exe	32
PID 2520 wrote to memory of 1664	2520	0x0008000000016031-17.exe	32
PID 1664 wrote to memory of 2936	1664	startui.exe	33
PID 1664 wrote to memory of 2936	1664	startui.exe	33
PID 1664 wrote to memory of 2936	1664	startui.exe	33

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\0x0008000000016031-17.exe
"C:\Users\Admin\AppData\Local\Temp\0x0008000000016031-17.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "startui" /sc ONLOGON /tr "C:\Program Files\SubDir\startui.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2304
- C:\Program Files\SubDir\startui.exe
  "C:\Program Files\SubDir\startui.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1664
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "startui" /sc ONLOGON /tr "C:\Program Files\SubDir\startui.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\SubDir\startui.exe

Filesize
3.1MB

MD5
7776335b8b0d230370ca39602c484a69

SHA1
7705fb56ea438e609a6094bef10bdb2392f55719

SHA256
b6bb8a533c77034b0d4eab34ffa434b1a999cac5f59983680d222f04e437729d

SHA512
0e290749b442e317fe90591a43549a003d7f95c086d220b04eae018209a9785a1754b834d529a5839b15d2aa783edd17e52f4ab2b331e3a14c47d84ebf24899d

Download Submit
memory/1664-10-0x0000000000D60000-0x0000000001084000-memory.dmp

Filesize
3.1MB

Download
memory/1664-9-0x000007FEF59D0000-0x000007FEF63BC000-memory.dmp

Filesize
9.9MB

Download
memory/1664-11-0x000007FEF59D0000-0x000007FEF63BC000-memory.dmp

Filesize
9.9MB

Download
memory/1664-12-0x000007FEF59D0000-0x000007FEF63BC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-0-0x000007FEF59D3000-0x000007FEF59D4000-memory.dmp

Filesize
4KB

Download
memory/2520-1-0x00000000002D0000-0x00000000005F4000-memory.dmp

Filesize
3.1MB

Download
memory/2520-2-0x000007FEF59D0000-0x000007FEF63BC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-8-0x000007FEF59D0000-0x000007FEF63BC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads