quasar | f47017465588d49383d9bb5071956e251d4c2ab024270f97b6ba35a3e6e7dec8

General

Target

Client-built10.exe
Size

3.1MB
MD5

8b09b710cf79da2dbb54ac8548eee0ad
SHA1

b75efaae2675e05f51337bb1380c38b692074656
SHA256

f47017465588d49383d9bb5071956e251d4c2ab024270f97b6ba35a3e6e7dec8
SHA512

92e08ed6248f7e25e630dcfdfadeac8ada8a402def03da2c74c1d69455a8f0262648cb3b14195ea8b7cb7e1de8e510f9fdff897017db9babb675eebd6e07feb5
SSDEEP

49152:WvUt62XlaSFNWPjljiFa2RoUYIxC11JuAoGd/THHB72eh2NT:WvI62XlaSFNWPjljiFXRoUYIxCF

Score

10^/10

quasar kazeku spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

kazeku

C2

0.tcp.ap.ngrok.io:10431

Mutex

7fb11f4b-e530-407c-a46c-8834ab5c4f45

Attributes

encryption_key
2E002E0BA1D95CECCDECD8F8B383C3F7C76A7FD7
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
kazeku
subdirectory
kazeku

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/2100-1-0x0000000000B70000-0x0000000000E94000-memory.dmp	family_quasar
behavioral1/files/0x000800000001686c-5.dat	family_quasar
behavioral1/memory/3036-8-0x0000000001190000-0x00000000014B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3036	Client.exe

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

Web Service

T1102

flow	ioc
2	0.tcp.ap.ngrok.io

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\kazeku\Client.exe	Client-built10.exe
File opened for modification	C:\Program Files\kazeku\Client.exe	Client-built10.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
2976	schtasks.exe
2148	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2100	Client-built10.exe
Token: SeDebugPrivilege	3036	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3036	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2976	2100	Client-built10.exe	30
PID 2100 wrote to memory of 2976	2100	Client-built10.exe	30
PID 2100 wrote to memory of 2976	2100	Client-built10.exe	30
PID 2100 wrote to memory of 3036	2100	Client-built10.exe	32
PID 2100 wrote to memory of 3036	2100	Client-built10.exe	32
PID 2100 wrote to memory of 3036	2100	Client-built10.exe	32
PID 3036 wrote to memory of 2148	3036	Client.exe	34
PID 3036 wrote to memory of 2148	3036	Client.exe	34
PID 3036 wrote to memory of 2148	3036	Client.exe	34

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\Client-built10.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built10.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "kazeku" /sc ONLOGON /tr "C:\Program Files\kazeku\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2976
- C:\Program Files\kazeku\Client.exe
  "C:\Program Files\kazeku\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3036
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "kazeku" /sc ONLOGON /tr "C:\Program Files\kazeku\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2148

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:\Program Files\kazeku\Client.exe

Filesize
3.1MB

MD5
8b09b710cf79da2dbb54ac8548eee0ad

SHA1
b75efaae2675e05f51337bb1380c38b692074656

SHA256
f47017465588d49383d9bb5071956e251d4c2ab024270f97b6ba35a3e6e7dec8

SHA512
92e08ed6248f7e25e630dcfdfadeac8ada8a402def03da2c74c1d69455a8f0262648cb3b14195ea8b7cb7e1de8e510f9fdff897017db9babb675eebd6e07feb5

Download Submit
memory/2100-0-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

Filesize
4KB

Download
memory/2100-1-0x0000000000B70000-0x0000000000E94000-memory.dmp

Filesize
3.1MB

Download
memory/2100-2-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2100-7-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-9-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-8-0x0000000001190000-0x00000000014B4000-memory.dmp

Filesize
3.1MB

Download
memory/3036-10-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-11-0x000007FEF5570000-0x000007FEF5F5C000-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