quasar | 8987314d0557f91f95e906b89b3856d39e248431e1a2597b7942c2b8dbb093d2

General

Target

wave-executor.exe
Size

3.2MB
MD5

c6a2761a380fe89642ceabb80b8fcd02
SHA1

7127092d54fa5a77827eb01f975a29990c3927af
SHA256

8987314d0557f91f95e906b89b3856d39e248431e1a2597b7942c2b8dbb093d2
SHA512

599ca4a551ffa916c646bd2db44c2312d9fe3a6f39ed272886e9af1fe54cbf9f5a41f31efe78097f6586af575fa99e2ef74143590e168de015e6459e5c32164d
SSDEEP

98304:GvP22SsaNYfdPBldt6+dBcjHwMCuvlImr:4A7jQMCudIm

Score

10^/10

quasar rblx spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

rblx

C2

2.tcp.eu.ngrok.io:14654

Mutex

4db75728-7a45-4507-a778-a8ace1ed2269

Attributes

encryption_key
4DE9D49BF4A14CD273D6EFBFCC1CAF4C36BBD512
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Multimedia Center
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2524-1-0x0000000000220000-0x0000000000566000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015415-5.dat	family_quasar
behavioral1/memory/1956-9-0x00000000008B0000-0x0000000000BF6000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
1956	Client.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

Processes:

flow	ioc
2	2.tcp.eu.ngrok.io
20	2.tcp.eu.ngrok.io
36	2.tcp.eu.ngrok.io

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

Processes:

schtasks.exeschtasks.exe

pid	Process
2440	schtasks.exe
2756	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

wave-executor.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	2524	wave-executor.exe
Token: SeDebugPrivilege	1956	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

wave-executor.exeClient.exe

description	pid	Process	procid_target
PID 2524 wrote to memory of 2440	2524	wave-executor.exe	30
PID 2524 wrote to memory of 2440	2524	wave-executor.exe	30
PID 2524 wrote to memory of 2440	2524	wave-executor.exe	30
PID 2524 wrote to memory of 1956	2524	wave-executor.exe	32
PID 2524 wrote to memory of 1956	2524	wave-executor.exe	32
PID 2524 wrote to memory of 1956	2524	wave-executor.exe	32
PID 1956 wrote to memory of 2756	1956	Client.exe	33
PID 1956 wrote to memory of 2756	1956	Client.exe	33
PID 1956 wrote to memory of 2756	1956	Client.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\wave-executor.exe
"C:\Users\Admin\AppData\Local\Temp\wave-executor.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Windows Multimedia Center" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2440
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1956
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Windows Multimedia Center" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2756

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.2MB

MD5
c6a2761a380fe89642ceabb80b8fcd02

SHA1
7127092d54fa5a77827eb01f975a29990c3927af

SHA256
8987314d0557f91f95e906b89b3856d39e248431e1a2597b7942c2b8dbb093d2

SHA512
599ca4a551ffa916c646bd2db44c2312d9fe3a6f39ed272886e9af1fe54cbf9f5a41f31efe78097f6586af575fa99e2ef74143590e168de015e6459e5c32164d

Download Submit
memory/1956-8-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1956-9-0x00000000008B0000-0x0000000000BF6000-memory.dmp

Filesize
3.3MB

Download
memory/1956-10-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1956-11-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1956-12-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/2524-0-0x000007FEF5483000-0x000007FEF5484000-memory.dmp

Filesize
4KB

Download
memory/2524-1-0x0000000000220000-0x0000000000566000-memory.dmp

Filesize
3.3MB

Download
memory/2524-2-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/2524-7-0x000007FEF5480000-0x000007FEF5E6C000-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