quasar | ab7f57812dcc2c9ddd51aa06afdbc083d6f42dc8a4d1a9f2ab91bcee9722fef3

General

Target

CandyDDoser-installerx32.exe
Size

3.1MB
MD5

b020b1f73c110300f25ae110b3dd59df
SHA1

8bfa300b77c9c3e302001311d88568d816c590ae
SHA256

ab7f57812dcc2c9ddd51aa06afdbc083d6f42dc8a4d1a9f2ab91bcee9722fef3
SHA512

98047f3bab00b4c4d6a3a23c0d31c7940328a8d6d1cfed1173ead3b094fc95ba18f57729a75045f9d5c7a8e5c1e9496f12617efc7a370a75e6c87b25455b9339
SSDEEP

49152:/v7I22SsaNYfdPBldt698dBcjHQ0lRJ61bR3LoGdL1THHB72eh2NTz:/vE22SsaNYfdPBldt6+dBcjHQ0lRJ6H

Score

10^/10

quasar candyddoser-installer spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CandyDDoser-Installer

C2

127.0.0.1:5656

Mutex

a4451484-07b3-4077-bce4-aad7f3859a48

Attributes

encryption_key
0BF10FE69CA9AD8F67C8185E9EEB25C381EB6210
install_name
system32remove.exe
log_directory
Logs
reconnect_delay
10
startup_key
system32
subdirectory
Windows

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/2960-1-0x0000000000F80000-0x00000000012A8000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016edb-6.dat	family_quasar
behavioral1/memory/2804-9-0x0000000000DE0000-0x0000000001108000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2804	system32remove.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\Windows\system32remove.exe	CandyDDoser-installerx32.exe
File opened for modification	C:\Windows\system32\Windows\system32remove.exe	CandyDDoser-installerx32.exe
File opened for modification	C:\Windows\system32\Windows	CandyDDoser-installerx32.exe
File opened for modification	C:\Windows\system32\Windows\system32remove.exe	system32remove.exe
File opened for modification	C:\Windows\system32\Windows	system32remove.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
2428	schtasks.exe
2324	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2960	CandyDDoser-installerx32.exe
Token: SeDebugPrivilege	2804	system32remove.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2804	system32remove.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2804	system32remove.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2804	system32remove.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2960 wrote to memory of 2428	2960	CandyDDoser-installerx32.exe	30
PID 2960 wrote to memory of 2428	2960	CandyDDoser-installerx32.exe	30
PID 2960 wrote to memory of 2428	2960	CandyDDoser-installerx32.exe	30
PID 2960 wrote to memory of 2804	2960	CandyDDoser-installerx32.exe	32
PID 2960 wrote to memory of 2804	2960	CandyDDoser-installerx32.exe	32
PID 2960 wrote to memory of 2804	2960	CandyDDoser-installerx32.exe	32
PID 2804 wrote to memory of 2324	2804	system32remove.exe	33
PID 2804 wrote to memory of 2324	2804	system32remove.exe	33
PID 2804 wrote to memory of 2324	2804	system32remove.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\CandyDDoser-installerx32.exe
"C:\Users\Admin\AppData\Local\Temp\CandyDDoser-installerx32.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2960
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "system32" /sc ONLOGON /tr "C:\Windows\system32\Windows\system32remove.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2428
- C:\Windows\system32\Windows\system32remove.exe
  "C:\Windows\system32\Windows\system32remove.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "system32" /sc ONLOGON /tr "C:\Windows\system32\Windows\system32remove.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2324

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\Windows\system32remove.exe

Filesize
3.1MB

MD5
b020b1f73c110300f25ae110b3dd59df

SHA1
8bfa300b77c9c3e302001311d88568d816c590ae

SHA256
ab7f57812dcc2c9ddd51aa06afdbc083d6f42dc8a4d1a9f2ab91bcee9722fef3

SHA512
98047f3bab00b4c4d6a3a23c0d31c7940328a8d6d1cfed1173ead3b094fc95ba18f57729a75045f9d5c7a8e5c1e9496f12617efc7a370a75e6c87b25455b9339

Download Submit
memory/2804-9-0x0000000000DE0000-0x0000000001108000-memory.dmp

Filesize
3.2MB

Download
memory/2804-10-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

Filesize
9.9MB

Download
memory/2804-11-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

Filesize
9.9MB

Download
memory/2804-12-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

Filesize
9.9MB

Download
memory/2804-13-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

Filesize
9.9MB

Download
memory/2960-0-0x000007FEF5213000-0x000007FEF5214000-memory.dmp

Filesize
4KB

Download
memory/2960-1-0x0000000000F80000-0x00000000012A8000-memory.dmp

Filesize
3.2MB

Download
memory/2960-2-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

Filesize
9.9MB

Download
memory/2960-8-0x000007FEF5210000-0x000007FEF5BFC000-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