quasar | ed237426763cff72e5e75aa93dee447e1c78fe91f6c6acf48c76674d2762e1ab

Analysis

max time kernel
148s
max time network
119s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
14-01-2025 01:54

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General

Target

Client-built.exe
Size

3.1MB
MD5

2594c80a4d8d3b9c2f93cab60eef17c3
SHA1

c0f60b85cce551523cccba6c89286b435326b692
SHA256

ed237426763cff72e5e75aa93dee447e1c78fe91f6c6acf48c76674d2762e1ab
SHA512

d1caf32394d494e9cba71346f400db2995515ce02e570c7350c123b15dd0bcef8e8368073688929935b9c2516c7ca69c39abbdc1f141b3bba3855ee492b7764e
SSDEEP

49152:+vaY52fyaSZOrPWluWBuGG5g5hl9C+5wGjBev6oGdU/bTHHB72eh2NT:+vv52fyaSZOrPWluWBDG5g5hbCc

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/2128-1-0x0000000001190000-0x00000000014B4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016332-6.dat	family_quasar
behavioral1/memory/2308-8-0x0000000001100000-0x0000000001424000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2308	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
2524	schtasks.exe
1500	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2128	Client-built.exe
Token: SeDebugPrivilege	2308	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2308	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 2524	2128	Client-built.exe	30
PID 2128 wrote to memory of 2524	2128	Client-built.exe	30
PID 2128 wrote to memory of 2524	2128	Client-built.exe	30
PID 2128 wrote to memory of 2308	2128	Client-built.exe	32
PID 2128 wrote to memory of 2308	2128	Client-built.exe	32
PID 2128 wrote to memory of 2308	2128	Client-built.exe	32
PID 2308 wrote to memory of 1500	2308	svchost.exe	33
PID 2308 wrote to memory of 1500	2308	svchost.exe	33
PID 2308 wrote to memory of 1500	2308	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:2128
- 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:2524
- 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:2308
- - 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:1500

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
2594c80a4d8d3b9c2f93cab60eef17c3

SHA1
c0f60b85cce551523cccba6c89286b435326b692

SHA256
ed237426763cff72e5e75aa93dee447e1c78fe91f6c6acf48c76674d2762e1ab

SHA512
d1caf32394d494e9cba71346f400db2995515ce02e570c7350c123b15dd0bcef8e8368073688929935b9c2516c7ca69c39abbdc1f141b3bba3855ee492b7764e

Download Submit
memory/2128-0-0x000007FEF6103000-0x000007FEF6104000-memory.dmp

Filesize
4KB

Download
memory/2128-1-0x0000000001190000-0x00000000014B4000-memory.dmp

Filesize
3.1MB

Download
memory/2128-2-0x000007FEF6100000-0x000007FEF6AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2128-9-0x000007FEF6100000-0x000007FEF6AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-8-0x0000000001100000-0x0000000001424000-memory.dmp

Filesize
3.1MB

Download
memory/2308-11-0x000007FEF6100000-0x000007FEF6AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-10-0x000007FEF6100000-0x000007FEF6AEC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-12-0x000007FEF6100000-0x000007FEF6AEC000-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