quasar | b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f

Analysis

max time kernel
94s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-11-2024 18:26

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General

Target

b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe
Size

1.4MB
MD5

e95f7184a33d6edeecd365f7ad93d11e
SHA1

b9154f8ad3d068549617c7cd32bfade8ce2c5f09
SHA256

b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f
SHA512

7d85203949dc197766391e96c7638e2ee630043ac443ffc7ae271acfc70f29b5d748ac40eec8062705de23ab1545ad3abb642e3b890f87632b9ac36b84d24fa8
SSDEEP

12288:b/bzOGnF/lx54LOaJleaqIs/eBj52DYWQNwF/zsjVODN/By:bmGLZmx5gYWRaYJ/w

Score

10^/10

quasar man discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

man

new-visit.com:3791

Mutex

3302836a-f2f9-4646-981e-42b54ed610dd

Attributes

encryption_key
C058A6A166AF85C9027394334AA2BDC41A9B7D9C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/4724-1098-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2520 created 3520	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	56

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MaxGeneration.vbs	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2520 set thread context of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88

System Location Discovery: System Language Discovery 1 TTPs 6 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3740	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3740	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe
Token: SeDebugPrivilege	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe
Token: SeDebugPrivilege	4724	InstallUtil.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4724	InstallUtil.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4724	InstallUtil.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 2520 wrote to memory of 4724	2520	b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe	88
PID 4724 wrote to memory of 5100	4724	InstallUtil.exe	94
PID 4724 wrote to memory of 5100	4724	InstallUtil.exe	94
PID 4724 wrote to memory of 5100	4724	InstallUtil.exe	94
PID 5100 wrote to memory of 1444	5100	cmd.exe	96
PID 5100 wrote to memory of 1444	5100	cmd.exe	96
PID 5100 wrote to memory of 1444	5100	cmd.exe	96
PID 5100 wrote to memory of 3740	5100	cmd.exe	97
PID 5100 wrote to memory of 3740	5100	cmd.exe	97
PID 5100 wrote to memory of 3740	5100	cmd.exe	97
PID 5100 wrote to memory of 5020	5100	cmd.exe	103
PID 5100 wrote to memory of 5020	5100	cmd.exe	103
PID 5100 wrote to memory of 5020	5100	cmd.exe	103

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3520
- C:\Users\Admin\AppData\Local\Temp\b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe
  "C:\Users\Admin\AppData\Local\Temp\b8955e1e7cb3acd7b1bcd6328c5e11969c5dbacd2162cd34f3afb73d7ba4b80f.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Drops startup file
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2520
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4724
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\n3gvaOWqymEb.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5100
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:1444
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 10 localhost
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:3740
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:5020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\InstallUtil.exe.log

Filesize
1KB

MD5
38b07cd5da5c740e9629fd801dc26e5a

SHA1
42816159ab9367165cf58603b09b134d488c1690

SHA256
20049cc7ade63a31f442dfd2b99740f0512fdcc764266b8b105292e30d2b7483

SHA512
1769ffefe181531476e10311295f38d11b85b5ec3710000b5cb081675e5f233792f96bb4178b75fd0e2cfc86965e7368173d22799a1e9fa3317ddd49047fab5a

Download Submit
C:\Users\Admin\AppData\Local\Temp\n3gvaOWqymEb.bat

Filesize
220B

MD5
9e0794d2967d2acab61f1181f2b7fba9

SHA1
bb8a1449ca4adc94cd27962c9197df1a3d68e3f2

SHA256
4d37c4c6a3cc6f3367a999225920d542f9a1b40f3ffdefe6fa06659480a2d627

SHA512
831588190eee785cd5222aff30d979f2b40a1908818773a7a3e569a3d342dc8a7116c7a522990880c1034d85d528827d2f9aa5929cdbe9293dd2f508d0709f67

Download Submit
memory/2520-0-0x00000000743FE000-0x00000000743FF000-memory.dmp

Filesize
4KB

Download
memory/2520-1-0x0000000000CE0000-0x0000000000E50000-memory.dmp

Filesize
1.4MB

Download
memory/2520-2-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/2520-3-0x0000000005CA0000-0x0000000005CB0000-memory.dmp

Filesize
64KB

Download
memory/2520-4-0x0000000006BD0000-0x0000000006DDC000-memory.dmp

Filesize
2.0MB

Download
memory/2520-5-0x00000000073D0000-0x0000000007974000-memory.dmp

Filesize
5.6MB

Download
memory/2520-6-0x0000000006F20000-0x0000000006FB2000-memory.dmp

Filesize
584KB

Download
memory/2520-20-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-24-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-38-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-66-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-56-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-46-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-44-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-42-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-40-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-36-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-35-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-32-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-30-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-28-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-26-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-22-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-18-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-16-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-14-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-12-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-10-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-8-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-7-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-64-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-62-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-60-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-58-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-54-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-52-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-50-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-48-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-70-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-68-0x0000000006BD0000-0x0000000006DD6000-memory.dmp

Filesize
2.0MB

Download
memory/2520-1081-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/2520-1082-0x00000000071E0000-0x000000000735E000-memory.dmp

Filesize
1.5MB

Download
memory/2520-1083-0x0000000007030000-0x000000000707C000-memory.dmp

Filesize
304KB

Download
memory/2520-1085-0x00000000743FE000-0x00000000743FF000-memory.dmp

Filesize
4KB

Download
memory/2520-1088-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/2520-1089-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/2520-1090-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/2520-1092-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/2520-1091-0x0000000007080000-0x00000000070D4000-memory.dmp

Filesize
336KB

Download
memory/2520-1096-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/4724-1097-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/4724-1098-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/4724-1099-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/4724-1100-0x0000000005420000-0x000000000542A000-memory.dmp

Filesize
40KB

Download
memory/4724-1101-0x0000000006980000-0x0000000006F98000-memory.dmp

Filesize
6.1MB

Download
memory/4724-1102-0x0000000006510000-0x0000000006560000-memory.dmp

Filesize
320KB

Download
memory/4724-1103-0x0000000006770000-0x0000000006822000-memory.dmp

Filesize
712KB

Download
memory/4724-1108-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/5020-1112-0x0000000003110000-0x000000000312A000-memory.dmp

Filesize
104KB

Download
memory/5020-1111-0x0000000000DA0000-0x0000000000DAC000-memory.dmp

Filesize
48KB

Download