quasar | 69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa

General

Target

69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
Size

3.1MB
MD5

6315500aabd2f39e6ff1743778b843b4
SHA1

d6ef0623f9ced45bf3eb3f384e1d74b0d8dfeabb
SHA256

69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa
SHA512

01429c1d376eeafd7633f098e1693a2882888157a4c876f1c2fcc66da69ebbfd1ab97cb5f8097a33e403f9edf9ba3c53e300ba7463e8ca4a064716e0bc49d693
SSDEEP

49152:gvat62XlaSFNWPjljiFa2RoUYI1M4RJ6rbR3aoGdvYTHHB72eh2NT:gvS62XlaSFNWPjljiFXRoUYI1M4RJ6M

Score

10^/10

quasar 1 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

1

C2

boyshelpboys.com:443

boyshelpboys.com:80

Mutex

8c9d3f58-45fb-4754-9a78-119dc12b3b80

Attributes

encryption_key
4B518181F5BFF92222945FFF2A4095319B5E9CA2
install_name
xiaojie1.exe
log_directory
Logs
reconnect_delay
20
startup_key
xiaojie
subdirectory
bhb

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/1620-1-0x0000000000100000-0x0000000000424000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b99-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3872	xiaojie1.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\bhb\xiaojie1.exe	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
File opened for modification	C:\Windows\system32\bhb\xiaojie1.exe	xiaojie1.exe
File created	C:\Windows\system32\bhb\xiaojie1.exe	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.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
4460	schtasks.exe
372	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1620	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
Token: SeDebugPrivilege	3872	xiaojie1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3872	xiaojie1.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 372	1620	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	82
PID 1620 wrote to memory of 372	1620	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	82
PID 1620 wrote to memory of 3872	1620	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	84
PID 1620 wrote to memory of 3872	1620	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	84
PID 3872 wrote to memory of 4460	3872	xiaojie1.exe	85
PID 3872 wrote to memory of 4460	3872	xiaojie1.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\69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
"C:\Users\Admin\AppData\Local\Temp\69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "xiaojie" /sc ONLOGON /tr "C:\Windows\system32\bhb\xiaojie1.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:372
- C:\Windows\system32\bhb\xiaojie1.exe
  "C:\Windows\system32\bhb\xiaojie1.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3872
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "xiaojie" /sc ONLOGON /tr "C:\Windows\system32\bhb\xiaojie1.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4460

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\System32\bhb\xiaojie1.exe

Filesize
3.1MB

MD5
6315500aabd2f39e6ff1743778b843b4

SHA1
d6ef0623f9ced45bf3eb3f384e1d74b0d8dfeabb

SHA256
69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa

SHA512
01429c1d376eeafd7633f098e1693a2882888157a4c876f1c2fcc66da69ebbfd1ab97cb5f8097a33e403f9edf9ba3c53e300ba7463e8ca4a064716e0bc49d693

Download Submit
memory/1620-0-0x00007FFB52293000-0x00007FFB52295000-memory.dmp

Filesize
8KB

Download
memory/1620-1-0x0000000000100000-0x0000000000424000-memory.dmp

Filesize
3.1MB

Download
memory/1620-2-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download
memory/1620-10-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download
memory/3872-9-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download
memory/3872-11-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download
memory/3872-12-0x000000001BBC0000-0x000000001BC10000-memory.dmp

Filesize
320KB

Download
memory/3872-13-0x000000001BCD0000-0x000000001BD82000-memory.dmp

Filesize
712KB

Download
memory/3872-16-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download
memory/3872-17-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads