quasar | fcb3dff30df407b61463dddbeb990fe7f4f78b41e6f43915325f4b78ab69f34d

General

Target

System.exe
Size

3.1MB
MD5

fed9a2c4913364c73e04d7a2e818e5b0
SHA1

20cd6c16f76950da6cff2d638360cc4dd1959b96
SHA256

f6de94ee28d98ffb171eca1c8716b4577a3546bac44e41596fe5e1c84d8970bd
SHA512

1484733be349db43da7eba830e130b9f3c1071982ba128536c0920eaa491339bfa30c7659a8de41c4696c784d195123d966fc1542370f831cf593dde7c7b5ffe
SSDEEP

49152:Wvht62XlaSFNWPjljiFa2RoUYIICh1JeLoGd2eTHHB72eh2NT:WvL62XlaSFNWPjljiFXRoUYIICi

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

adnan1453.duckdns.org:7000

Mutex

5dc678e1-94c3-4678-929d-93496063af39

Attributes

encryption_key
3A59215E830DCED5E8B222D0893FB53E5581C45B
install_name
System.exe
log_directory
Logs
reconnect_delay
3000
startup_key
System
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4852-1-0x0000000000580000-0x00000000008A4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c8a-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

System.exe

pid	Process
4520	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

Processes:

schtasks.exeschtasks.exe

pid	Process
5008	schtasks.exe
4224	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

System.exeSystem.exe

description	pid	Process
Token: SeDebugPrivilege	4852	System.exe
Token: SeDebugPrivilege	4520	System.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

System.exe

pid	Process
4520	System.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

System.exe

pid	Process
4520	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

System.exe

pid	Process
4520	System.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

System.exeSystem.exe

description	pid	Process	procid_target
PID 4852 wrote to memory of 5008	4852	System.exe	87
PID 4852 wrote to memory of 5008	4852	System.exe	87
PID 4852 wrote to memory of 4520	4852	System.exe	89
PID 4852 wrote to memory of 4520	4852	System.exe	89
PID 4520 wrote to memory of 4224	4520	System.exe	90
PID 4520 wrote to memory of 4224	4520	System.exe	90

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\System.exe
"C:\Users\Admin\AppData\Local\Temp\System.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4852
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5008
- 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:4520
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\System.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4224

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\System.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\System.exe

Filesize
3.1MB

MD5
fed9a2c4913364c73e04d7a2e818e5b0

SHA1
20cd6c16f76950da6cff2d638360cc4dd1959b96

SHA256
f6de94ee28d98ffb171eca1c8716b4577a3546bac44e41596fe5e1c84d8970bd

SHA512
1484733be349db43da7eba830e130b9f3c1071982ba128536c0920eaa491339bfa30c7659a8de41c4696c784d195123d966fc1542370f831cf593dde7c7b5ffe

Download Submit
memory/4520-11-0x00007FFC4B1C0000-0x00007FFC4BC81000-memory.dmp

Filesize
10.8MB

Download
memory/4520-12-0x00007FFC4B1C0000-0x00007FFC4BC81000-memory.dmp

Filesize
10.8MB

Download
memory/4520-13-0x000000001C4C0000-0x000000001C510000-memory.dmp

Filesize
320KB

Download
memory/4520-14-0x000000001C5D0000-0x000000001C682000-memory.dmp

Filesize
712KB

Download
memory/4520-15-0x00007FFC4B1C0000-0x00007FFC4BC81000-memory.dmp

Filesize
10.8MB

Download
memory/4852-0-0x00007FFC4B1C3000-0x00007FFC4B1C5000-memory.dmp

Filesize
8KB

Download
memory/4852-1-0x0000000000580000-0x00000000008A4000-memory.dmp

Filesize
3.1MB

Download
memory/4852-2-0x00007FFC4B1C0000-0x00007FFC4BC81000-memory.dmp

Filesize
10.8MB

Download
memory/4852-10-0x00007FFC4B1C0000-0x00007FFC4BC81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads