quasar | f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e

General

Target

f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe
Size

3.1MB
MD5

70c0ee5e46a65955c63f59f16fb539b5
SHA1

1c832151726e1799d6cbc2382eabab61f7d563c9
SHA256

f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e
SHA512

5027088ad40e56c1a8f779903668b81e37efaadd6e48ca7c855a9c7ba8c053b7aaa60b368dbc5ab2c00e4fa8ab753f598f6a3daaa554bd373cebfeb7ed5863fb
SSDEEP

49152:Svht62XlaSFNWPjljiFa2RoUYIQv7RBBxihoGdtJTHHB72eh2NTF:SvL62XlaSFNWPjljiFXRoUYIIRKw

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.125:4782

Mutex

18900002-3d71-4d3d-a3e4-f1b8ae453173

Attributes

encryption_key
F964335D77161C935F99410F722D66D3032FFF56
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
client
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/4552-1-0x00000000009D0000-0x0000000000CF4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c76-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2192	Client.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
4788	schtasks.exe
2448	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4552	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe
Token: SeDebugPrivilege	2192	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2192	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2192	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2192	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 4788	4552	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	83
PID 4552 wrote to memory of 4788	4552	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	83
PID 4552 wrote to memory of 2192	4552	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	85
PID 4552 wrote to memory of 2192	4552	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	85
PID 2192 wrote to memory of 2448	2192	Client.exe	86
PID 2192 wrote to memory of 2448	2192	Client.exe	86

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\f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe
"C:\Users\Admin\AppData\Local\Temp\f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4788
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2192
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2448

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\Client.exe

Filesize
3.1MB

MD5
70c0ee5e46a65955c63f59f16fb539b5

SHA1
1c832151726e1799d6cbc2382eabab61f7d563c9

SHA256
f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e

SHA512
5027088ad40e56c1a8f779903668b81e37efaadd6e48ca7c855a9c7ba8c053b7aaa60b368dbc5ab2c00e4fa8ab753f598f6a3daaa554bd373cebfeb7ed5863fb

Download Submit
memory/2192-9-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/2192-11-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/2192-12-0x000000001C510000-0x000000001C560000-memory.dmp

Filesize
320KB

Download
memory/2192-13-0x000000001C620000-0x000000001C6D2000-memory.dmp

Filesize
712KB

Download
memory/2192-14-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/4552-0-0x00007FFA96DC3000-0x00007FFA96DC5000-memory.dmp

Filesize
8KB

Download
memory/4552-1-0x00000000009D0000-0x0000000000CF4000-memory.dmp

Filesize
3.1MB

Download
memory/4552-2-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/4552-10-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads