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 3 IoCs

resource	yara_rule
behavioral1/memory/2500-1-0x0000000000810000-0x0000000000B34000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016d4a-6.dat	family_quasar
behavioral1/memory/2576-10-0x0000000000290000-0x00000000005B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2576	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
2596	schtasks.exe
2716	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2500	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe
Token: SeDebugPrivilege	2576	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2576	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2576	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2576	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 2596	2500	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	30
PID 2500 wrote to memory of 2596	2500	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	30
PID 2500 wrote to memory of 2596	2500	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	30
PID 2500 wrote to memory of 2576	2500	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	32
PID 2500 wrote to memory of 2576	2500	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	32
PID 2500 wrote to memory of 2576	2500	f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe	32
PID 2576 wrote to memory of 2716	2576	Client.exe	33
PID 2576 wrote to memory of 2716	2576	Client.exe	33
PID 2576 wrote to memory of 2716	2576	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\f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe
"C:\Users\Admin\AppData\Local\Temp\f7db4ec7a0359f0b078232a915cf579815d78201874ea87a915b57a3e278668e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2500
- 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:2596
- 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:2576
- - 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:2716

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/2500-0-0x000007FEF5EC3000-0x000007FEF5EC4000-memory.dmp

Filesize
4KB

Download
memory/2500-1-0x0000000000810000-0x0000000000B34000-memory.dmp

Filesize
3.1MB

Download
memory/2500-2-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download
memory/2500-9-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download
memory/2576-8-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download
memory/2576-10-0x0000000000290000-0x00000000005B4000-memory.dmp

Filesize
3.1MB

Download
memory/2576-11-0x000007FEF5EC0000-0x000007FEF68AC000-memory.dmp

Filesize
9.9MB

Download
memory/2576-12-0x000007FEF5EC0000-0x000007FEF68AC000-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