quasar | a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723

Analysis

max time kernel
118s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-11-2024 19:24

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General

Target

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Size

876KB
MD5

81cb7328f6e4c75fbbfbc328fdb21df0
SHA1

c086e182fb08a835e51125f0d997af0155d1d0a2
SHA256

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723
SHA512

7ea8623c8e17eac7b5451b69ffa5eb98888e7ffac6e1b00e1681881812bb9de308086ce01e2f65a32ba3f16bf20f2826fc55b5e159fc18a32a52191e82970a27
SSDEEP

12288:6COzWsvIDqNc4Gqu7x5BRd6CMWMpFY0wjTyE9OXcg6VpUoME4KN6eclg5QU:BOzxiqgjx5TddMWM0/83UDMTKgw

Score

10^/10

quasar aoy discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

AOY

87.120.120.27:61540

127.0.0.1:61540

87.121.86.205:61541

Mutex

QSR_MUTEX_NOCv4TURf46HbVbxyc

Attributes

encryption_key
fVsndNhImy9VosyZSQbQ
install_name
updates.exe
log_directory
Logs
reconnect_delay
4000
startup_key
Windows Update
subdirectory
Windows

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/2336-6-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2336-8-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2336-10-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

updates.exeupdates.exe

pid	Process
2720	updates.exe
2768	updates.exe

Loads dropped DLL 2 IoCs

Processes:

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeupdates.exe

pid	Process
2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
2720	updates.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
2	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

Processes:

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeupdates.exe

description	pid	Process	procid_target
PID 2384 set thread context of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2720 set thread context of 2768	2720	updates.exe	35

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

schtasks.exeupdates.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updates.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
2792	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeupdates.exe

description	pid	Process
Token: SeDebugPrivilege	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Token: SeDebugPrivilege	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Token: SeDebugPrivilege	2720	updates.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeupdates.exe

description	pid	Process	procid_target
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2384 wrote to memory of 2336	2384	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	30
PID 2336 wrote to memory of 2792	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	32
PID 2336 wrote to memory of 2792	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	32
PID 2336 wrote to memory of 2792	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	32
PID 2336 wrote to memory of 2792	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	32
PID 2336 wrote to memory of 2720	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	34
PID 2336 wrote to memory of 2720	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	34
PID 2336 wrote to memory of 2720	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	34
PID 2336 wrote to memory of 2720	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	34
PID 2336 wrote to memory of 2720	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	34
PID 2336 wrote to memory of 2720	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	34
PID 2336 wrote to memory of 2720	2336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	34
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35
PID 2720 wrote to memory of 2768	2720	updates.exe	35

C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
"C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
  C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2792
- - C:\Users\Admin\AppData\Roaming\Windows\updates.exe
    "C:\Users\Admin\AppData\Roaming\Windows\updates.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2720
  - - C:\Users\Admin\AppData\Roaming\Windows\updates.exe
      C:\Users\Admin\AppData\Roaming\Windows\updates.exe
      4⤵
      Executes dropped EXE
      PID:2768

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\Windows\updates.exe

Filesize
876KB

MD5
81cb7328f6e4c75fbbfbc328fdb21df0

SHA1
c086e182fb08a835e51125f0d997af0155d1d0a2

SHA256
a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723

SHA512
7ea8623c8e17eac7b5451b69ffa5eb98888e7ffac6e1b00e1681881812bb9de308086ce01e2f65a32ba3f16bf20f2826fc55b5e159fc18a32a52191e82970a27

Download Submit
memory/2336-12-0x0000000074C90000-0x000000007537E000-memory.dmp

Filesize
6.9MB

Download
memory/2336-13-0x0000000074C90000-0x000000007537E000-memory.dmp

Filesize
6.9MB

Download
memory/2336-21-0x0000000074C90000-0x000000007537E000-memory.dmp

Filesize
6.9MB

Download
memory/2336-10-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2336-8-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2336-6-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2384-11-0x0000000074C90000-0x000000007537E000-memory.dmp

Filesize
6.9MB

Download
memory/2384-5-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2384-0-0x0000000074C9E000-0x0000000074C9F000-memory.dmp

Filesize
4KB

Download
memory/2384-4-0x0000000006DB0000-0x0000000006EB6000-memory.dmp

Filesize
1.0MB

Download
memory/2384-2-0x00000000003B0000-0x00000000003B6000-memory.dmp

Filesize
24KB

Download
memory/2384-1-0x00000000008A0000-0x0000000000980000-memory.dmp

Filesize
896KB

Download
memory/2384-3-0x0000000074C90000-0x000000007537E000-memory.dmp

Filesize
6.9MB

Download
memory/2720-20-0x0000000000180000-0x0000000000260000-memory.dmp

Filesize
896KB

Download