quasar | bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff

General

Target

Registry.exe
Size

3.1MB
MD5

6f154cc5f643cc4228adf17d1ff32d42
SHA1

10efef62da024189beb4cd451d3429439729675b
SHA256

bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff
SHA512

050fc8a9a852d87f22296be8fe4067d6fabefc2dec408da3684a0deb31983617e8ba42494d3dbe75207d0810dec7ae1238b17b23ed71668cc099a31e1f6539d1
SSDEEP

49152:KvXI22SsaNYfdPBldt698dBcjHEIW+stuoGdXTHHB72eh2NT:KvY22SsaNYfdPBldt6+dBcjH7W+sM

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

14.243.221.170:2654

Mutex

a7b38fdd-192e-4e47-b9ba-ca9eb81cc7bd

Attributes

encryption_key
8B9AD736E943A06EAF1321AD479071E83805704C
install_name
Runtime Broker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Runtime Broker
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/1972-1-0x0000000000E20000-0x0000000001144000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016d36-5.dat	family_quasar
behavioral1/memory/2548-8-0x0000000000370000-0x0000000000694000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2548	Runtime Broker.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
2124	schtasks.exe
2204	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1972	Registry.exe
Token: SeDebugPrivilege	2548	Runtime Broker.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2548	Runtime Broker.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2548	Runtime Broker.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 2124	1972	Registry.exe	30
PID 1972 wrote to memory of 2124	1972	Registry.exe	30
PID 1972 wrote to memory of 2124	1972	Registry.exe	30
PID 1972 wrote to memory of 2548	1972	Registry.exe	32
PID 1972 wrote to memory of 2548	1972	Registry.exe	32
PID 1972 wrote to memory of 2548	1972	Registry.exe	32
PID 2548 wrote to memory of 2204	2548	Runtime Broker.exe	33
PID 2548 wrote to memory of 2204	2548	Runtime Broker.exe	33
PID 2548 wrote to memory of 2204	2548	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\Registry.exe
"C:\Users\Admin\AppData\Local\Temp\Registry.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2124
- C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2204

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\Runtime Broker.exe

Filesize
3.1MB

MD5
6f154cc5f643cc4228adf17d1ff32d42

SHA1
10efef62da024189beb4cd451d3429439729675b

SHA256
bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff

SHA512
050fc8a9a852d87f22296be8fe4067d6fabefc2dec408da3684a0deb31983617e8ba42494d3dbe75207d0810dec7ae1238b17b23ed71668cc099a31e1f6539d1

Download Submit
memory/1972-0-0x000007FEF58D3000-0x000007FEF58D4000-memory.dmp

Filesize
4KB

Download
memory/1972-1-0x0000000000E20000-0x0000000001144000-memory.dmp

Filesize
3.1MB

Download
memory/1972-2-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/1972-7-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2548-9-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2548-8-0x0000000000370000-0x0000000000694000-memory.dmp

Filesize
3.1MB

Download
memory/2548-10-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2548-11-0x000007FEF58D0000-0x000007FEF62BC000-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