quasar | c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70

General

Target

c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe
Size

3.1MB
MD5

196e2ae082841b1ab98dcfa445cf2704
SHA1

4af7f4bb970331ae1eb569100de98c93b61c5459
SHA256

c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70
SHA512

b64cf310fc65954c4873889ce68bce0539435539d6ff017d8c0238ee829ec9fd5220398558f58e17e9154210856f245d94bd6bcf7780edf0aae6bed71958232e
SSDEEP

49152:Pv/lL26AaNeWgPhlmVqvMQ7XSK4tMK1J3SoGdOTHHB72eh2NT:PvNL26AaNeWgPhlmVqkQ7XSK4tMz

Score

10^/10

quasar database spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

database

C2

91.160.181.237:4782

91.160.181.237:4783

Mutex

bcda0faa-47b1-4e7d-be7c-8ff6fbc69a61

Attributes

encryption_key
65940F11374651C87E8131C4328E542AEFE6F05D
install_name
Runtime Broker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Runtime Broker
subdirectory
Runtime Broker

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/4620-1-0x0000000000C00000-0x0000000000F24000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b68-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4464	Runtime Broker.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\Runtime Broker	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe
File opened for modification	C:\Windows\system32\Runtime Broker\Runtime Broker.exe	Runtime Broker.exe
File opened for modification	C:\Windows\system32\Runtime Broker	Runtime Broker.exe
File opened for modification	C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5\	Runtime Broker.exe
File created	C:\Windows\system32\Runtime Broker\Runtime Broker.exe	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe
File opened for modification	C:\Windows\system32\Runtime Broker\Runtime Broker.exe	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe

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
4824	schtasks.exe
4868	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4620	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe
Token: SeDebugPrivilege	4464	Runtime Broker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4464	Runtime Broker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4620 wrote to memory of 4824	4620	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	82
PID 4620 wrote to memory of 4824	4620	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	82
PID 4620 wrote to memory of 4464	4620	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	84
PID 4620 wrote to memory of 4464	4620	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	84
PID 4464 wrote to memory of 4868	4464	Runtime Broker.exe	85
PID 4464 wrote to memory of 4868	4464	Runtime Broker.exe	85

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\c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe
"C:\Users\Admin\AppData\Local\Temp\c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4620
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\Runtime Broker\Runtime Broker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4824
- C:\Windows\system32\Runtime Broker\Runtime Broker.exe
  "C:\Windows\system32\Runtime Broker\Runtime Broker.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4464
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\Runtime Broker\Runtime Broker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4868

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\Runtime Broker\Runtime Broker.exe

Filesize
3.1MB

MD5
196e2ae082841b1ab98dcfa445cf2704

SHA1
4af7f4bb970331ae1eb569100de98c93b61c5459

SHA256
c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70

SHA512
b64cf310fc65954c4873889ce68bce0539435539d6ff017d8c0238ee829ec9fd5220398558f58e17e9154210856f245d94bd6bcf7780edf0aae6bed71958232e

Download Submit
memory/4464-11-0x00007FFDF1C10000-0x00007FFDF26D1000-memory.dmp

Filesize
10.8MB

Download
memory/4464-9-0x00007FFDF1C10000-0x00007FFDF26D1000-memory.dmp

Filesize
10.8MB

Download
memory/4464-12-0x000000001BB30000-0x000000001BB80000-memory.dmp

Filesize
320KB

Download
memory/4464-13-0x000000001C350000-0x000000001C402000-memory.dmp

Filesize
712KB

Download
memory/4464-16-0x000000001C300000-0x000000001C312000-memory.dmp

Filesize
72KB

Download
memory/4464-17-0x000000001CA90000-0x000000001CACC000-memory.dmp

Filesize
240KB

Download
memory/4464-18-0x00007FFDF1C10000-0x00007FFDF26D1000-memory.dmp

Filesize
10.8MB

Download
memory/4464-20-0x00007FFDF1C10000-0x00007FFDF26D1000-memory.dmp

Filesize
10.8MB

Download
memory/4620-2-0x00007FFDF1C10000-0x00007FFDF26D1000-memory.dmp

Filesize
10.8MB

Download
memory/4620-1-0x0000000000C00000-0x0000000000F24000-memory.dmp

Filesize
3.1MB

Download
memory/4620-10-0x00007FFDF1C10000-0x00007FFDF26D1000-memory.dmp

Filesize
10.8MB

Download
memory/4620-0-0x00007FFDF1C13000-0x00007FFDF1C15000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads