quasar | a9704b9ec835390fe47e215aa4928bed85698818c5de90ad11e1bc61de12fff1

Analysis

max time kernel
133s
max time network
143s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 05:46

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General

Target

Client-built.exe
Size

3.1MB
MD5

86bd4496eab8ed85c7806bbe8b4faeff
SHA1

93908110af4954cda171542785bf17c0203077f5
SHA256

a9704b9ec835390fe47e215aa4928bed85698818c5de90ad11e1bc61de12fff1
SHA512

53d49ada84dc2c712805beb18e00b10eb1d730ca9d02dc559b8c0594452eb2ac64af719cb26ec9b8cc4486969078e4640138a5be295f7e968fef2db4c08b1214
SSDEEP

49152:SvJI22SsaNYfdPBldt698dBcjH62RJ6GbR3LoGdOzGTHHB72eh2NT:Svq22SsaNYfdPBldt6+dBcjH62RJ6A

Score

10^/10

quasar victim spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

victim

192.168.0.8:4782

Mutex

b4f8207c-44c4-442b-9a76-0a5ef954b8b8

Attributes

encryption_key
2EF56B2D5415EB3BBA2A2D7B6B83FB157B370CDE
install_name
cilent-bulit.exe
log_directory
Logs
reconnect_delay
100
startup_key
solara
subdirectory
cilent-bulit

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/2848-1-0x0000000000DC0000-0x00000000010E4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016dc6-6.dat	family_quasar
behavioral1/memory/2800-9-0x0000000000E10000-0x0000000001134000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

cilent-bulit.exe

pid	Process
2800	cilent-bulit.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

Processes:

schtasks.exeschtasks.exe

pid	Process
2556	schtasks.exe
2384	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.execilent-bulit.exe

description	pid	Process
Token: SeDebugPrivilege	2848	Client-built.exe
Token: SeDebugPrivilege	2800	cilent-bulit.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Client-built.execilent-bulit.exe

description	pid	Process	procid_target
PID 2848 wrote to memory of 2384	2848	Client-built.exe	31
PID 2848 wrote to memory of 2384	2848	Client-built.exe	31
PID 2848 wrote to memory of 2384	2848	Client-built.exe	31
PID 2848 wrote to memory of 2800	2848	Client-built.exe	33
PID 2848 wrote to memory of 2800	2848	Client-built.exe	33
PID 2848 wrote to memory of 2800	2848	Client-built.exe	33
PID 2800 wrote to memory of 2556	2800	cilent-bulit.exe	34
PID 2800 wrote to memory of 2556	2800	cilent-bulit.exe	34
PID 2800 wrote to memory of 2556	2800	cilent-bulit.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-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\cilent-bulit\cilent-bulit.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2384
- C:\Users\Admin\AppData\Roaming\cilent-bulit\cilent-bulit.exe
  "C:\Users\Admin\AppData\Roaming\cilent-bulit\cilent-bulit.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2800
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\cilent-bulit\cilent-bulit.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\cilent-bulit\cilent-bulit.exe

Filesize
3.1MB

MD5
86bd4496eab8ed85c7806bbe8b4faeff

SHA1
93908110af4954cda171542785bf17c0203077f5

SHA256
a9704b9ec835390fe47e215aa4928bed85698818c5de90ad11e1bc61de12fff1

SHA512
53d49ada84dc2c712805beb18e00b10eb1d730ca9d02dc559b8c0594452eb2ac64af719cb26ec9b8cc4486969078e4640138a5be295f7e968fef2db4c08b1214

Download Submit
memory/2800-11-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2800-10-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2800-9-0x0000000000E10000-0x0000000001134000-memory.dmp

Filesize
3.1MB

Download
memory/2800-12-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2848-0-0x000007FEF5D23000-0x000007FEF5D24000-memory.dmp

Filesize
4KB

Download
memory/2848-1-0x0000000000DC0000-0x00000000010E4000-memory.dmp

Filesize
3.1MB

Download
memory/2848-2-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2848-8-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download