quasar | 475d80a9c80ae084c34d321bc8d6d97a9ad8394b608f62cfa53e0b0313d6e040

General

Target

CatWare.exe
Size

3.1MB
MD5

803cc54f484ecae234df37adb1a297ae
SHA1

1562c04da59e2394dc6d253875c34c55b44fb399
SHA256

475d80a9c80ae084c34d321bc8d6d97a9ad8394b608f62cfa53e0b0313d6e040
SHA512

a55217a4e44001a432204d94ce0763a0819ff24dca969d202e59695499f67b4c89e64cec321afaabf13f186a94b5e426955964615e01f5ad7b49db04aa0df7d1
SSDEEP

49152:evgt62XlaSFNWPjljiFa2RoUYIBZY3Iar70oGd9eTHHB72eh2NT:evM62XlaSFNWPjljiFXRoUYI83K

Score

10^/10

quasar ratted spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ratted

C2

192.168.1.90:4782

Mutex

c88aa6bc-e16c-4a3b-b3c1-319b31585ecc

Attributes

encryption_key
0840B8A7EBCF09FE22D53C459C6E856527018552
install_name
Mapper.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Discord inc.
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1508-1-0x0000000000290000-0x00000000005B4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000018710-5.dat	family_quasar
behavioral1/memory/2424-8-0x0000000000260000-0x0000000000584000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Mapper.exe

pid	Process
2424	Mapper.exe

Drops file in System32 directory 2 IoCs

Processes:

CatWare.exe

description	ioc	Process
File created	C:\Windows\system32\SubDir\Mapper.exe	CatWare.exe
File opened for modification	C:\Windows\system32\SubDir\Mapper.exe	CatWare.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

Processes:

schtasks.exeschtasks.exe

pid	Process
2764	schtasks.exe
2396	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

CatWare.exeMapper.exe

description	pid	Process
Token: SeDebugPrivilege	1508	CatWare.exe
Token: SeDebugPrivilege	2424	Mapper.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Mapper.exe

pid	Process
2424	Mapper.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Mapper.exe

pid	Process
2424	Mapper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Mapper.exe

pid	Process
2424	Mapper.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

CatWare.exeMapper.exe

description	pid	Process	procid_target
PID 1508 wrote to memory of 2396	1508	CatWare.exe	30
PID 1508 wrote to memory of 2396	1508	CatWare.exe	30
PID 1508 wrote to memory of 2396	1508	CatWare.exe	30
PID 1508 wrote to memory of 2424	1508	CatWare.exe	32
PID 1508 wrote to memory of 2424	1508	CatWare.exe	32
PID 1508 wrote to memory of 2424	1508	CatWare.exe	32
PID 2424 wrote to memory of 2764	2424	Mapper.exe	33
PID 2424 wrote to memory of 2764	2424	Mapper.exe	33
PID 2424 wrote to memory of 2764	2424	Mapper.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\CatWare.exe
"C:\Users\Admin\AppData\Local\Temp\CatWare.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1508
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Discord inc." /sc ONLOGON /tr "C:\Windows\system32\SubDir\Mapper.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2396
- C:\Windows\system32\SubDir\Mapper.exe
  "C:\Windows\system32\SubDir\Mapper.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2424
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Discord inc." /sc ONLOGON /tr "C:\Windows\system32\SubDir\Mapper.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2764

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Mapper.exe

Filesize
3.1MB

MD5
803cc54f484ecae234df37adb1a297ae

SHA1
1562c04da59e2394dc6d253875c34c55b44fb399

SHA256
475d80a9c80ae084c34d321bc8d6d97a9ad8394b608f62cfa53e0b0313d6e040

SHA512
a55217a4e44001a432204d94ce0763a0819ff24dca969d202e59695499f67b4c89e64cec321afaabf13f186a94b5e426955964615e01f5ad7b49db04aa0df7d1

Download Submit
memory/1508-0-0x000007FEF67C3000-0x000007FEF67C4000-memory.dmp

Filesize
4KB

Download
memory/1508-1-0x0000000000290000-0x00000000005B4000-memory.dmp

Filesize
3.1MB

Download
memory/1508-2-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/1508-9-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/2424-7-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/2424-8-0x0000000000260000-0x0000000000584000-memory.dmp

Filesize
3.1MB

Download
memory/2424-10-0x000007FEF67C0000-0x000007FEF71AC000-memory.dmp

Filesize
9.9MB

Download
memory/2424-11-0x000007FEF67C0000-0x000007FEF71AC000-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