quasar | e832cc0da0e1298acb1088ba43c06897b58f8b3f6bbc0be18ec7eac3313fc7ba

General

Target

Client-built.exe
Size

3.1MB
MD5

88213eb46504fd2a6e3977e73bc0dd2b
SHA1

2765643bdb8f2968d116d5b400dfaecc9d7597f7
SHA256

e832cc0da0e1298acb1088ba43c06897b58f8b3f6bbc0be18ec7eac3313fc7ba
SHA512

572b8d5fac6847ef91583d808338c852ebc49be41c8fd9c46f356a0f45fdcfa9d57eec642a22b1dadb5f53278f06763f424d361a90012bf4d4ecbca2fa366674
SSDEEP

49152:ivFt62XlaSFNWPjljiFa2RoUYIJoRJ6vbR3LoGd5THHB72eh2NT:iv362XlaSFNWPjljiFXRoUYIJoRJ6B

Score

10^/10

quasar jjsploit spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

jjsploit

C2

188.64.33.70:4782

Mutex

37345452-b4a7-4ed0-aaed-6b1e75131c4b

Attributes

encryption_key
DD3FB2AC53353CAF73D31F6A4C82182824F3697B
install_name
system.exe
log_directory
Logs
reconnect_delay
3000
startup_key
System Updater
subdirectory
SubDir

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/2568-1-0x0000000001280000-0x00000000015A4000-memory.dmp	family_quasar
behavioral1/files/0x000800000001960c-4.dat	family_quasar
behavioral1/memory/3008-8-0x0000000001120000-0x0000000001444000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3008	system.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
1892	schtasks.exe
2864	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2568	Client-built.exe
Token: SeDebugPrivilege	3008	system.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3008	system.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3008	system.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3008	system.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2568 wrote to memory of 1892	2568	Client-built.exe	30
PID 2568 wrote to memory of 1892	2568	Client-built.exe	30
PID 2568 wrote to memory of 1892	2568	Client-built.exe	30
PID 2568 wrote to memory of 3008	2568	Client-built.exe	32
PID 2568 wrote to memory of 3008	2568	Client-built.exe	32
PID 2568 wrote to memory of 3008	2568	Client-built.exe	32
PID 3008 wrote to memory of 2864	3008	system.exe	33
PID 3008 wrote to memory of 2864	3008	system.exe	33
PID 3008 wrote to memory of 2864	3008	system.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:2568
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "System Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\system.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1892
- C:\Users\Admin\AppData\Roaming\SubDir\system.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\system.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:3008
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "System Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\system.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2864

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\SubDir\system.exe

Filesize
3.1MB

MD5
88213eb46504fd2a6e3977e73bc0dd2b

SHA1
2765643bdb8f2968d116d5b400dfaecc9d7597f7

SHA256
e832cc0da0e1298acb1088ba43c06897b58f8b3f6bbc0be18ec7eac3313fc7ba

SHA512
572b8d5fac6847ef91583d808338c852ebc49be41c8fd9c46f356a0f45fdcfa9d57eec642a22b1dadb5f53278f06763f424d361a90012bf4d4ecbca2fa366674

Download Submit
memory/2568-0-0x000007FEF6183000-0x000007FEF6184000-memory.dmp

Filesize
4KB

Download
memory/2568-1-0x0000000001280000-0x00000000015A4000-memory.dmp

Filesize
3.1MB

Download
memory/2568-2-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/2568-9-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-7-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-8-0x0000000001120000-0x0000000001444000-memory.dmp

Filesize
3.1MB

Download
memory/3008-10-0x000007FEF6180000-0x000007FEF6B6C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-11-0x000007FEF6180000-0x000007FEF6B6C000-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