quasar | bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff

General

Target

bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.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 2 IoCs

resource	yara_rule
behavioral2/memory/4024-1-0x0000000000DB0000-0x00000000010D4000-memory.dmp	family_quasar
behavioral2/files/0x0032000000023b75-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3588	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
3728	schtasks.exe
4220	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4024	bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.exe
Token: SeDebugPrivilege	3588	Runtime Broker.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3588	Runtime Broker.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3588	Runtime Broker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4024 wrote to memory of 3728	4024	bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.exe	83
PID 4024 wrote to memory of 3728	4024	bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.exe	83
PID 4024 wrote to memory of 3588	4024	bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.exe	85
PID 4024 wrote to memory of 3588	4024	bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.exe	85
PID 3588 wrote to memory of 4220	3588	Runtime Broker.exe	86
PID 3588 wrote to memory of 4220	3588	Runtime Broker.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\bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.exe
"C:\Users\Admin\AppData\Local\Temp\bf901de5b54a593b3d90a2bcfdf0a963ba52381f542bf33299bdfcc3b5b2afff.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4024
- 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:3728
- 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:3588
- - 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:4220

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/3588-8-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/3588-10-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/3588-11-0x000000001DB00000-0x000000001DB50000-memory.dmp

Filesize
320KB

Download
memory/3588-12-0x000000001DC10000-0x000000001DCC2000-memory.dmp

Filesize
712KB

Download
memory/3588-13-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/4024-0-0x00007FFB80F43000-0x00007FFB80F45000-memory.dmp

Filesize
8KB

Download
memory/4024-1-0x0000000000DB0000-0x00000000010D4000-memory.dmp

Filesize
3.1MB

Download
memory/4024-2-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/4024-9-0x00007FFB80F40000-0x00007FFB81A01000-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