quasar | ac67ed61a6bb0d7db50756f4dbacdb56ed90755f1d9e693d9e3650445b271474

General

Target

Client-built.exe
Size

3.1MB
MD5

1e95dbf3d51282ba1c6c455072db3853
SHA1

62460f6c11bdf66f5180fd06cf50bb6cc1b342f4
SHA256

ac67ed61a6bb0d7db50756f4dbacdb56ed90755f1d9e693d9e3650445b271474
SHA512

965720b3bfaa906748d9fc75d6688fd438245a404724b07aa69282030167559007e0133bf2e5ede8476e15ea8c3d556ecf10d8658ee7d6ccc8d1d73f128232b1
SSDEEP

49152:DvulL26AaNeWgPhlmVqvMQ7XSKCO/RJ6mbR3LoGdQTHHB72eh2NT:DveL26AaNeWgPhlmVqkQ7XSKCO/RJ6g

Score

10^/10

quasar trey spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

trey

C2

problems-estimation.gl.at.ply.gg:23158

Mutex

108c9f83-3a30-4ea4-82a6-924c2fb96505

Attributes

encryption_key
3C4A7FEC35CCD9EF97E67742362289CDF4B0B0AE
install_name
trey.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/1964-1-0x0000000000C50000-0x0000000000F74000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016ce8-6.dat	family_quasar
behavioral1/memory/2336-10-0x0000000000260000-0x0000000000584000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2336	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
1216	schtasks.exe
2128	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1964	Client-built.exe
Token: SeDebugPrivilege	2336	trey.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2336	trey.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2336	trey.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2336	trey.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 1216	1964	Client-built.exe	30
PID 1964 wrote to memory of 1216	1964	Client-built.exe	30
PID 1964 wrote to memory of 1216	1964	Client-built.exe	30
PID 1964 wrote to memory of 2336	1964	Client-built.exe	32
PID 1964 wrote to memory of 2336	1964	Client-built.exe	32
PID 1964 wrote to memory of 2336	1964	Client-built.exe	32
PID 2336 wrote to memory of 2128	2336	trey.exe	33
PID 2336 wrote to memory of 2128	2336	trey.exe	33
PID 2336 wrote to memory of 2128	2336	trey.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1964
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\trey\trey.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1216
- 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:2336
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\trey\trey.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2128

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
1e95dbf3d51282ba1c6c455072db3853

SHA1
62460f6c11bdf66f5180fd06cf50bb6cc1b342f4

SHA256
ac67ed61a6bb0d7db50756f4dbacdb56ed90755f1d9e693d9e3650445b271474

SHA512
965720b3bfaa906748d9fc75d6688fd438245a404724b07aa69282030167559007e0133bf2e5ede8476e15ea8c3d556ecf10d8658ee7d6ccc8d1d73f128232b1

Download Submit
memory/1964-0-0x000007FEF5083000-0x000007FEF5084000-memory.dmp

Filesize
4KB

Download
memory/1964-1-0x0000000000C50000-0x0000000000F74000-memory.dmp

Filesize
3.1MB

Download
memory/1964-2-0x000007FEF5080000-0x000007FEF5A6C000-memory.dmp

Filesize
9.9MB

Download
memory/1964-9-0x000007FEF5080000-0x000007FEF5A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2336-8-0x000007FEF5080000-0x000007FEF5A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2336-10-0x0000000000260000-0x0000000000584000-memory.dmp

Filesize
3.1MB

Download
memory/2336-11-0x000007FEF5080000-0x000007FEF5A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2336-12-0x000007FEF5080000-0x000007FEF5A6C000-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