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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1504-1-0x0000000000240000-0x0000000000564000-memory.dmp	family_quasar
behavioral1/files/0x0007000000016d04-6.dat	family_quasar
behavioral1/memory/2628-9-0x0000000000260000-0x0000000000584000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

System.exe

pid	Process
2628	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
2612	schtasks.exe
2968	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

System.exeSystem.exe

description	pid	Process
Token: SeDebugPrivilege	1504	System.exe
Token: SeDebugPrivilege	2628	System.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

System.exe

pid	Process
2628	System.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

System.exe

pid	Process
2628	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

System.exe

pid	Process
2628	System.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

System.exeSystem.exe

description	pid	Process	procid_target
PID 1504 wrote to memory of 2612	1504	System.exe	30
PID 1504 wrote to memory of 2612	1504	System.exe	30
PID 1504 wrote to memory of 2612	1504	System.exe	30
PID 1504 wrote to memory of 2628	1504	System.exe	32
PID 1504 wrote to memory of 2628	1504	System.exe	32
PID 1504 wrote to memory of 2628	1504	System.exe	32
PID 2628 wrote to memory of 2968	2628	System.exe	33
PID 2628 wrote to memory of 2968	2628	System.exe	33
PID 2628 wrote to memory of 2968	2628	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\System.exe
"C:\Users\Admin\AppData\Local\Temp\System.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1504
- 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:2612
- 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:2628
- - 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:2968

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
fed9a2c4913364c73e04d7a2e818e5b0

SHA1
20cd6c16f76950da6cff2d638360cc4dd1959b96

SHA256
f6de94ee28d98ffb171eca1c8716b4577a3546bac44e41596fe5e1c84d8970bd

SHA512
1484733be349db43da7eba830e130b9f3c1071982ba128536c0920eaa491339bfa30c7659a8de41c4696c784d195123d966fc1542370f831cf593dde7c7b5ffe

Download Submit
memory/1504-0-0x000007FEF5E73000-0x000007FEF5E74000-memory.dmp

Filesize
4KB

Download
memory/1504-1-0x0000000000240000-0x0000000000564000-memory.dmp

Filesize
3.1MB

Download
memory/1504-2-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/1504-10-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2628-8-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2628-9-0x0000000000260000-0x0000000000584000-memory.dmp

Filesize
3.1MB

Download
memory/2628-11-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2628-12-0x000007FEF5E70000-0x000007FEF685C000-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