quasar | d51970428644e1ee55c4cdfc83d2a02f179e1189ef8720693d66481e7076760a

General

Target

Client-built.exe
Size

3.1MB
MD5

d3ed88ff2977884d528346aefcab8d1d
SHA1

3f85f93fbcd43db4969d603d11a334de1d053947
SHA256

d51970428644e1ee55c4cdfc83d2a02f179e1189ef8720693d66481e7076760a
SHA512

1c18d69fda811ef2f6f57547160ce09dae9e0e974ffc22392bd324ebb944a31a360c5c5ff935d9912d4e83817d934cc2c5c19b9907dbd4f3f61ac9f325e5d6be
SSDEEP

49152:OvQt62XlaSFNWPjljiFa2RoUYISCH1J4LoGdlBTHHB72eh2NT:Ovc62XlaSFNWPjljiFXRoUYISCO1

Score

10^/10

quasar test-rat spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

test-rat

C2

192.168.68.103:5000

Mutex

e2bb43be-2392-4c93-9a3c-dcea173d5afd

Attributes

encryption_key
AE2F816185F134AF4E7D747D3E55802DE0F16A45
install_name
Virus-Rat.exe
log_directory
Logs
reconnect_delay
3000
startup_key
rat test
subdirectory
Rat-Test-cx

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/1952-1-0x0000000000CC0000-0x0000000000FE4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016ccc-5.dat	family_quasar
behavioral1/memory/2476-9-0x0000000000170000-0x0000000000494000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2476	Virus-Rat.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

pid	Process
2300	schtasks.exe
2856	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1952	Client-built.exe
Token: SeDebugPrivilege	2476	Virus-Rat.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2476	Virus-Rat.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2476	Virus-Rat.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2476	Virus-Rat.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 2300	1952	Client-built.exe	31
PID 1952 wrote to memory of 2300	1952	Client-built.exe	31
PID 1952 wrote to memory of 2300	1952	Client-built.exe	31
PID 1952 wrote to memory of 2476	1952	Client-built.exe	33
PID 1952 wrote to memory of 2476	1952	Client-built.exe	33
PID 1952 wrote to memory of 2476	1952	Client-built.exe	33
PID 2476 wrote to memory of 2856	2476	Virus-Rat.exe	34
PID 2476 wrote to memory of 2856	2476	Virus-Rat.exe	34
PID 2476 wrote to memory of 2856	2476	Virus-Rat.exe	34

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1952
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "rat test" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Rat-Test-cx\Virus-Rat.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2300
- C:\Users\Admin\AppData\Roaming\Rat-Test-cx\Virus-Rat.exe
  "C:\Users\Admin\AppData\Roaming\Rat-Test-cx\Virus-Rat.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:2476
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "rat test" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Rat-Test-cx\Virus-Rat.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2856

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:\Users\Admin\AppData\Roaming\Rat-Test-cx\Virus-Rat.exe

Filesize
3.1MB

MD5
d3ed88ff2977884d528346aefcab8d1d

SHA1
3f85f93fbcd43db4969d603d11a334de1d053947

SHA256
d51970428644e1ee55c4cdfc83d2a02f179e1189ef8720693d66481e7076760a

SHA512
1c18d69fda811ef2f6f57547160ce09dae9e0e974ffc22392bd324ebb944a31a360c5c5ff935d9912d4e83817d934cc2c5c19b9907dbd4f3f61ac9f325e5d6be

Download Submit
memory/1952-0-0x000007FEF5833000-0x000007FEF5834000-memory.dmp

Filesize
4KB

Download
memory/1952-1-0x0000000000CC0000-0x0000000000FE4000-memory.dmp

Filesize
3.1MB

Download
memory/1952-2-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/1952-7-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2476-8-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2476-9-0x0000000000170000-0x0000000000494000-memory.dmp

Filesize
3.1MB

Download
memory/2476-10-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2476-11-0x000007FEF5830000-0x000007FEF621C000-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