quasar | 781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553

General

Target

781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe
Size

3.1MB
MD5

7b168e023b1876cd9163d58f98f3b67c
SHA1

906a5cfacd3797c603f3efe863aaedeabacb5918
SHA256

781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553
SHA512

bed18054e9fce2cdc185e4536386d042f20d98c9354e1603bb87b8747403e63bdbabfb88e72708dcdfb3468860655dcb34b237024d3395782c092dd772fec518
SSDEEP

49152:avkt62XlaSFNWPjljiFa2RoUYIlBRJ63bR3LoGdGFTHHB72eh2NT:av462XlaSFNWPjljiFXRoUYIlBRJ6J

Score

10^/10

quasar runtimebroker spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RunTimeBroker

C2

98.51.190.130:20

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes

encryption_key
7A589EDBC6A581E125BF830EF0D05FC74BB75E30
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
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/2720-1-0x0000000000B60000-0x0000000000E84000-memory.dmp	family_quasar
behavioral1/files/0x00330000000194e9-6.dat	family_quasar
behavioral1/memory/2580-10-0x0000000000360000-0x0000000000684000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2580	Client.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
2808	schtasks.exe
2912	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe
Token: SeDebugPrivilege	2580	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2580	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 2808	2720	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	30
PID 2720 wrote to memory of 2808	2720	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	30
PID 2720 wrote to memory of 2808	2720	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	30
PID 2720 wrote to memory of 2580	2720	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	32
PID 2720 wrote to memory of 2580	2720	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	32
PID 2720 wrote to memory of 2580	2720	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	32
PID 2580 wrote to memory of 2912	2580	Client.exe	33
PID 2580 wrote to memory of 2912	2580	Client.exe	33
PID 2580 wrote to memory of 2912	2580	Client.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\781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe
"C:\Users\Admin\AppData\Local\Temp\781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2720
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2808
- 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:2580
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2912

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:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
7b168e023b1876cd9163d58f98f3b67c

SHA1
906a5cfacd3797c603f3efe863aaedeabacb5918

SHA256
781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553

SHA512
bed18054e9fce2cdc185e4536386d042f20d98c9354e1603bb87b8747403e63bdbabfb88e72708dcdfb3468860655dcb34b237024d3395782c092dd772fec518

Download Submit
memory/2580-8-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2580-10-0x0000000000360000-0x0000000000684000-memory.dmp

Filesize
3.1MB

Download
memory/2580-11-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2580-12-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2720-0-0x000007FEF5D33000-0x000007FEF5D34000-memory.dmp

Filesize
4KB

Download
memory/2720-1-0x0000000000B60000-0x0000000000E84000-memory.dmp

Filesize
3.1MB

Download
memory/2720-2-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2720-9-0x000007FEF5D30000-0x000007FEF671C000-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