quasar | 97a83514d72fdb32ff49a7c8526c4a180a5affefc1af9f2abd9c799aa3ac0548

General

Target

built.exe
Size

348KB
MD5

fb1057eee229c44ceea060397b9f8ff1
SHA1

0528f64effa73492a54a97535ee1a4e65d0ad023
SHA256

97a83514d72fdb32ff49a7c8526c4a180a5affefc1af9f2abd9c799aa3ac0548
SHA512

899c3e467379c04e32e4ca9868640c3e4a282c40780ebb5be63677d4c2155e5970e37f6e490e45796b7964a8736d24aa50936861236b29e7dfc71b9cc43dd892
SSDEEP

6144:1mSiPqU23zkkEUcadASlBx+bS7VqlvfbbOA30DbJi:coU2fIS11EtbOu0DbJi

Score

10^/10

quasar test discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Test

C2

100.115.92.196:8080

100.115.92.196:22

100.115.92.196:3389

Mutex

QSR_MUTEX_B6Q8duJmC3tqQvImXE

Attributes

encryption_key
Fv3xsfvJChgh6yTF3T1x
install_name
win.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Runtime
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/3764-1-0x0000000000010000-0x000000000006E000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b68-11.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3476	win.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
6	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	built.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
3456	schtasks.exe
2684	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3764	built.exe
Token: SeDebugPrivilege	3476	win.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3476	win.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3764 wrote to memory of 3456	3764	built.exe	84
PID 3764 wrote to memory of 3456	3764	built.exe	84
PID 3764 wrote to memory of 3456	3764	built.exe	84
PID 3764 wrote to memory of 3476	3764	built.exe	86
PID 3764 wrote to memory of 3476	3764	built.exe	86
PID 3764 wrote to memory of 3476	3764	built.exe	86
PID 3476 wrote to memory of 2684	3476	win.exe	88
PID 3476 wrote to memory of 2684	3476	win.exe	88
PID 3476 wrote to memory of 2684	3476	win.exe	88

C:\Users\Admin\AppData\Local\Temp\built.exe
"C:\Users\Admin\AppData\Local\Temp\built.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3764
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Runtime" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\built.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3456
- C:\Users\Admin\AppData\Roaming\SubDir\win.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\win.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3476
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Runtime" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\win.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2684

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\win.exe

Filesize
348KB

MD5
fb1057eee229c44ceea060397b9f8ff1

SHA1
0528f64effa73492a54a97535ee1a4e65d0ad023

SHA256
97a83514d72fdb32ff49a7c8526c4a180a5affefc1af9f2abd9c799aa3ac0548

SHA512
899c3e467379c04e32e4ca9868640c3e4a282c40780ebb5be63677d4c2155e5970e37f6e490e45796b7964a8736d24aa50936861236b29e7dfc71b9cc43dd892

Download Submit
memory/3476-19-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/3476-18-0x0000000005F10000-0x0000000005F1A000-memory.dmp

Filesize
40KB

Download
memory/3476-16-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/3476-14-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/3764-3-0x0000000004A90000-0x0000000004B22000-memory.dmp

Filesize
584KB

Download
memory/3764-6-0x0000000005780000-0x0000000005792000-memory.dmp

Filesize
72KB

Download
memory/3764-7-0x0000000005CC0000-0x0000000005CFC000-memory.dmp

Filesize
240KB

Download
memory/3764-5-0x0000000004B30000-0x0000000004B96000-memory.dmp

Filesize
408KB

Download
memory/3764-4-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/3764-15-0x0000000074680000-0x0000000074E30000-memory.dmp

Filesize
7.7MB

Download
memory/3764-0-0x000000007468E000-0x000000007468F000-memory.dmp

Filesize
4KB

Download
memory/3764-2-0x0000000004F50000-0x00000000054F4000-memory.dmp

Filesize
5.6MB

Download
memory/3764-1-0x0000000000010000-0x000000000006E000-memory.dmp

Filesize
376KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads