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 3 IoCs

resource	yara_rule
behavioral1/memory/2860-1-0x0000000000B70000-0x0000000000E94000-memory.dmp	family_quasar
behavioral1/files/0x002f000000018bd7-6.dat	family_quasar
behavioral1/memory/2140-9-0x0000000000800000-0x0000000000B24000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2140	Runtime Broker.exe

Drops file in System32 directory 5 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 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
2868	schtasks.exe
2880	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2860	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe
Token: SeDebugPrivilege	2140	Runtime Broker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2140	Runtime Broker.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2860 wrote to memory of 2868	2860	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	30
PID 2860 wrote to memory of 2868	2860	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	30
PID 2860 wrote to memory of 2868	2860	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	30
PID 2860 wrote to memory of 2140	2860	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	32
PID 2860 wrote to memory of 2140	2860	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	32
PID 2860 wrote to memory of 2140	2860	c3e669b477d3e633bf336fc5d2506c86c8fc61b4d0be36fe2bbe3b361cf70a70.exe	32
PID 2140 wrote to memory of 2880	2140	Runtime Broker.exe	33
PID 2140 wrote to memory of 2880	2140	Runtime Broker.exe	33
PID 2140 wrote to memory of 2880	2140	Runtime Broker.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\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:2860
- 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:2868
- 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:2140
- - 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:2880

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/2140-10-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2140-9-0x0000000000800000-0x0000000000B24000-memory.dmp

Filesize
3.1MB

Download
memory/2140-11-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2140-12-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2860-0-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

Filesize
4KB

Download
memory/2860-1-0x0000000000B70000-0x0000000000E94000-memory.dmp

Filesize
3.1MB

Download
memory/2860-2-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2860-8-0x000007FEF6400000-0x000007FEF6DEC000-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