quasar | 6661ba1349745231bcee0d0f97ad80ed2db94732ab32cb4fa5e969cfa631a695

General

Target

Client-built1.exe
Size

3.1MB
MD5

bcaf70faf8cef879f13519ff4a94f9ab
SHA1

cdc11c7fd22cacf568ccdd97d00928128e35e974
SHA256

6661ba1349745231bcee0d0f97ad80ed2db94732ab32cb4fa5e969cfa631a695
SHA512

f0d795820773834b6fb19ba92cb0a698e645498f1252594626d88cdf952bc4503d4e4d32f970bad0267b7040af898721e186215184a27ca6a9aa05f829b77214
SSDEEP

49152:nv7I22SsaNYfdPBldt698dBcjHrKJGKGCDiUTHHB72eh2NT:nvE22SsaNYfdPBldt6+dBcjHrKQ

Score

10^/10

quasar system spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SYSTEM

C2

rather-reputation.gl.at.ply.gg:23827

Mutex

6f4b08b2-7091-41aa-a67e-9b869448a0c0

Attributes

encryption_key
17D2A006DF537BB025A18049E5586744E13D89C5
install_name
trey.exe
log_directory
Logs
reconnect_delay
3000
startup_key
SYSTEM
subdirectory
trey

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/2312-1-0x0000000000990000-0x0000000000CB4000-memory.dmp	family_quasar
behavioral1/files/0x00090000000161f6-6.dat	family_quasar
behavioral1/memory/1328-9-0x0000000000390000-0x00000000006B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1328	trey.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
1200	schtasks.exe
2168	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2312	Client-built1.exe
Token: SeDebugPrivilege	1328	trey.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1328	trey.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1328	trey.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1328	trey.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 1200	2312	Client-built1.exe	31
PID 2312 wrote to memory of 1200	2312	Client-built1.exe	31
PID 2312 wrote to memory of 1200	2312	Client-built1.exe	31
PID 2312 wrote to memory of 1328	2312	Client-built1.exe	33
PID 2312 wrote to memory of 1328	2312	Client-built1.exe	33
PID 2312 wrote to memory of 1328	2312	Client-built1.exe	33
PID 1328 wrote to memory of 2168	1328	trey.exe	34
PID 1328 wrote to memory of 2168	1328	trey.exe	34
PID 1328 wrote to memory of 2168	1328	trey.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-built1.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built1.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "SYSTEM" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\trey\trey.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1200
- C:\Users\Admin\AppData\Roaming\trey\trey.exe
  "C:\Users\Admin\AppData\Roaming\trey\trey.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:1328
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "SYSTEM" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\trey\trey.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2168

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\trey\trey.exe

Filesize
3.1MB

MD5
bcaf70faf8cef879f13519ff4a94f9ab

SHA1
cdc11c7fd22cacf568ccdd97d00928128e35e974

SHA256
6661ba1349745231bcee0d0f97ad80ed2db94732ab32cb4fa5e969cfa631a695

SHA512
f0d795820773834b6fb19ba92cb0a698e645498f1252594626d88cdf952bc4503d4e4d32f970bad0267b7040af898721e186215184a27ca6a9aa05f829b77214

Download Submit
memory/1328-8-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/1328-9-0x0000000000390000-0x00000000006B4000-memory.dmp

Filesize
3.1MB

Download
memory/1328-11-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/1328-12-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2312-0-0x000007FEF5F83000-0x000007FEF5F84000-memory.dmp

Filesize
4KB

Download
memory/2312-1-0x0000000000990000-0x0000000000CB4000-memory.dmp

Filesize
3.1MB

Download
memory/2312-2-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/2312-10-0x000007FEF5F80000-0x000007FEF696C000-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