quasar | 77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c

Analysis

max time kernel
146s
max time network
124s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
14/01/2025, 01:53

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General

Target

Client-built.exe
Size

3.1MB
MD5

18833ce91b26be79378f897dca190f66
SHA1

c7fdea28474a3e12ebe51aa878abeed9969d8d01
SHA256

77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c
SHA512

565b069175f60cce8d67eddfe41bc8ab5caadbe2ed41acd7a3108b96c3cf7fbdbc8593af7bbe1ad6ac33dd0444866073eff65ff001458b7e94c8ded9f41561c6
SSDEEP

49152:SvaY52fyaSZOrPWluWBuGG5g5hnDmVmzmioGdKeTHHB72eh2NT:Svv52fyaSZOrPWluWBDG5g5hnDmC

Score

10^/10

quasar offset spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Offset

127.0.0.1:8080

Mutex

6210ab1d-dd45-4f17-a324-f24c1474c4d8

Attributes

encryption_key
CABE6FE0988CAB22AE614AA6065A89402DF1C513
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
conhost
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/2060-1-0x00000000013C0000-0x00000000016E4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016d3f-6.dat	family_quasar
behavioral1/memory/1708-8-0x0000000000E10000-0x0000000001134000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1708	svchost.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
2620	schtasks.exe
3040	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2060	Client-built.exe
Token: SeDebugPrivilege	1708	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1708	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2620	2060	Client-built.exe	30
PID 2060 wrote to memory of 2620	2060	Client-built.exe	30
PID 2060 wrote to memory of 2620	2060	Client-built.exe	30
PID 2060 wrote to memory of 1708	2060	Client-built.exe	32
PID 2060 wrote to memory of 1708	2060	Client-built.exe	32
PID 2060 wrote to memory of 1708	2060	Client-built.exe	32
PID 1708 wrote to memory of 3040	1708	svchost.exe	33
PID 1708 wrote to memory of 3040	1708	svchost.exe	33
PID 1708 wrote to memory of 3040	1708	svchost.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2620
- C:\Users\Admin\AppData\Roaming\Windows\svchost.exe
  "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3040

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

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Downloads

C:\Users\Admin\AppData\Roaming\Windows\svchost.exe

Filesize
3.1MB

MD5
18833ce91b26be79378f897dca190f66

SHA1
c7fdea28474a3e12ebe51aa878abeed9969d8d01

SHA256
77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c

SHA512
565b069175f60cce8d67eddfe41bc8ab5caadbe2ed41acd7a3108b96c3cf7fbdbc8593af7bbe1ad6ac33dd0444866073eff65ff001458b7e94c8ded9f41561c6

Download Submit
memory/1708-8-0x0000000000E10000-0x0000000001134000-memory.dmp

Filesize
3.1MB

Download
memory/1708-10-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/1708-11-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/1708-12-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2060-0-0x000007FEF5DD3000-0x000007FEF5DD4000-memory.dmp

Filesize
4KB

Download
memory/2060-1-0x00000000013C0000-0x00000000016E4000-memory.dmp

Filesize
3.1MB

Download
memory/2060-2-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2060-9-0x000007FEF5DD0000-0x000007FEF67BC000-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