quasar | 5fb2ada2fd81c7b0ed6e517e92900c6336323bc9f1b7fb19989e9a4e44ef0213

General

Target

Client-built.exe
Size

3.1MB
MD5

73a3341a9194801bc9024e6b8f963258
SHA1

7c10750556e5eba8e9872432561f76d010d519f3
SHA256

5fb2ada2fd81c7b0ed6e517e92900c6336323bc9f1b7fb19989e9a4e44ef0213
SHA512

629756335bcb53b1fde013c4c090f580b622bafe6d340bba0b9d1d53c3acc0719dbae025fb389ccad1bc298835a76077607f34a3ededa6e701d3dacabac375f7
SSDEEP

49152:Cv5G42pda6D+/PjlLOlg6yQipVil6bn1JqLoGdbTHHB72eh2NT:Cvo42pda6D+/PjlLOlZyQipVLbM

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

auto-london.gl.at.ply.gg:51655

facilities-desktop.gl.at.ply.gg:5987

Mutex

1ae47733-5e8b-44b5-b988-3cb4dd5ded05

Attributes

encryption_key
3C8DD6CA308BD63A3F09A62959EA7F529CD3E4F7
install_name
bob123.exe
log_directory
Logs
reconnect_delay
0
startup_key
SytemUpd
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/2464-1-0x0000000001190000-0x00000000014B4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016de8-6.dat	family_quasar
behavioral1/memory/2184-9-0x0000000000CA0000-0x0000000000FC4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2184	bob123.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
2396	schtasks.exe
2928	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2464	Client-built.exe
Token: SeDebugPrivilege	2184	bob123.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2184	bob123.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2184	bob123.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2184	bob123.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2464 wrote to memory of 2396	2464	Client-built.exe	30
PID 2464 wrote to memory of 2396	2464	Client-built.exe	30
PID 2464 wrote to memory of 2396	2464	Client-built.exe	30
PID 2464 wrote to memory of 2184	2464	Client-built.exe	32
PID 2464 wrote to memory of 2184	2464	Client-built.exe	32
PID 2464 wrote to memory of 2184	2464	Client-built.exe	32
PID 2184 wrote to memory of 2928	2184	bob123.exe	33
PID 2184 wrote to memory of 2928	2184	bob123.exe	33
PID 2184 wrote to memory of 2928	2184	bob123.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:2464
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "SytemUpd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2396
- C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\bob123.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:2184
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "SytemUpd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2928

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\bob123.exe

Filesize
3.1MB

MD5
73a3341a9194801bc9024e6b8f963258

SHA1
7c10750556e5eba8e9872432561f76d010d519f3

SHA256
5fb2ada2fd81c7b0ed6e517e92900c6336323bc9f1b7fb19989e9a4e44ef0213

SHA512
629756335bcb53b1fde013c4c090f580b622bafe6d340bba0b9d1d53c3acc0719dbae025fb389ccad1bc298835a76077607f34a3ededa6e701d3dacabac375f7

Download Submit
memory/2184-10-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2184-9-0x0000000000CA0000-0x0000000000FC4000-memory.dmp

Filesize
3.1MB

Download
memory/2184-11-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2184-12-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2464-0-0x000007FEF6343000-0x000007FEF6344000-memory.dmp

Filesize
4KB

Download
memory/2464-1-0x0000000001190000-0x00000000014B4000-memory.dmp

Filesize
3.1MB

Download
memory/2464-2-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2464-8-0x000007FEF6340000-0x000007FEF6D2C000-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