quasar | e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

General

Target

e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe
Size

3.1MB
MD5

6a0bb84dcd837e83638f4292180bf5ab
SHA1

20e31ccffe1ac806e75ea839ea90b4c91e4322c5
SHA256

e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4
SHA512

d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5
SSDEEP

49152:Ovkt62XlaSFNWPjljiFa2RoUYIUOzML6oGd4y/THHB72eh2NT:Ov462XlaSFNWPjljiFXRoUYIpzMG

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.43.241:4782

Mutex

0517af80-95f0-4a6d-a904-5b7ee8faa157

Attributes

encryption_key
6095BF6D5D58D02597F98370DFD1CCEB782F1EDD
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svhost
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/2112-1-0x0000000001230000-0x0000000001554000-memory.dmp	family_quasar
behavioral1/files/0x00080000000173fb-6.dat	family_quasar
behavioral1/memory/2060-10-0x00000000001F0000-0x0000000000514000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2060	Client.exe

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
3056	schtasks.exe
1668	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2112	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe
Token: SeDebugPrivilege	2060	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2060	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 3056	2112	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	30
PID 2112 wrote to memory of 3056	2112	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	30
PID 2112 wrote to memory of 3056	2112	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	30
PID 2112 wrote to memory of 2060	2112	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	32
PID 2112 wrote to memory of 2060	2112	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	32
PID 2112 wrote to memory of 2060	2112	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	32
PID 2060 wrote to memory of 1668	2060	Client.exe	33
PID 2060 wrote to memory of 1668	2060	Client.exe	33
PID 2060 wrote to memory of 1668	2060	Client.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\e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe
"C:\Users\Admin\AppData\Local\Temp\e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3056
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2060
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1668

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
6a0bb84dcd837e83638f4292180bf5ab

SHA1
20e31ccffe1ac806e75ea839ea90b4c91e4322c5

SHA256
e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

SHA512
d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5

Download Submit
memory/2060-9-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2060-10-0x00000000001F0000-0x0000000000514000-memory.dmp

Filesize
3.1MB

Download
memory/2060-11-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2060-12-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2112-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

Filesize
4KB

Download
memory/2112-1-0x0000000001230000-0x0000000001554000-memory.dmp

Filesize
3.1MB

Download
memory/2112-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2112-8-0x000007FEF56D0000-0x000007FEF60BC000-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