quasar | 425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff

Analysis

max time kernel
140s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-11-2024 18:37

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General

Target

425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
Size

3.2MB
MD5

58abd80cc431895f2c2126f714ca3c8c
SHA1

9338c3bbe9e6dd3658848c03a5d3bcf02dfbe965
SHA256

425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff
SHA512

fcd8197173da2c475451f500cbea32b446d872a8553ebd76dae4ac3873ed8da149e8036cad65968f10d6719992e442e0ddfb458ce250c41521668d5117a14ec4
SSDEEP

49152:S9GUKQbhUbLP/WdzmmVoNyQNKXVTHUt0ONKgDGsbolFjeTXbjuOvtXcUwowyr4T5:yUbLPudCfUj0t0ON/GUW6lJ3HdjX0

Score

10^/10

quasar office04 discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

y20.ddns.net:5552

Mutex

081f9344-bbf0-4c0d-832c-1597fc2c5291

Attributes

encryption_key
51E85A39CEAF3ACB23D073483E360B1A632697B4
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

Processes:

resource	yara_rule
behavioral2/memory/4308-7-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

RegAsm.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
216	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe

description	pid	Process	procid_target
PID 4776 set thread context of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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:

powershell.exeRegAsm.execmd.exechcp.comPING.EXERegAsm.exe425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.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

Processes:

PING.EXE

pid	Process
4412	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
4412	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exepowershell.exe

pid	Process
4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
216	powershell.exe
216	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exepowershell.exeRegAsm.exe

description	pid	Process
Token: SeDebugPrivilege	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
Token: SeDebugPrivilege	216	powershell.exe
Token: SeDebugPrivilege	4308	RegAsm.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

RegAsm.exe

pid	Process
4308	RegAsm.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

RegAsm.exe

pid	Process
4308	RegAsm.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exeRegAsm.execmd.exe

description	pid	Process	procid_target
PID 4776 wrote to memory of 216	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	85
PID 4776 wrote to memory of 216	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	85
PID 4776 wrote to memory of 216	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	85
PID 4776 wrote to memory of 2144	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	87
PID 4776 wrote to memory of 2144	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	87
PID 4776 wrote to memory of 2144	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	87
PID 4776 wrote to memory of 4312	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	88
PID 4776 wrote to memory of 4312	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	88
PID 4776 wrote to memory of 4312	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	88
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4776 wrote to memory of 4308	4776	425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe	89
PID 4308 wrote to memory of 1696	4308	RegAsm.exe	92
PID 4308 wrote to memory of 1696	4308	RegAsm.exe	92
PID 4308 wrote to memory of 1696	4308	RegAsm.exe	92
PID 1696 wrote to memory of 2220	1696	cmd.exe	94
PID 1696 wrote to memory of 2220	1696	cmd.exe	94
PID 1696 wrote to memory of 2220	1696	cmd.exe	94
PID 1696 wrote to memory of 4412	1696	cmd.exe	95
PID 1696 wrote to memory of 4412	1696	cmd.exe	95
PID 1696 wrote to memory of 4412	1696	cmd.exe	95
PID 1696 wrote to memory of 3300	1696	cmd.exe	106
PID 1696 wrote to memory of 3300	1696	cmd.exe	106
PID 1696 wrote to memory of 3300	1696	cmd.exe	106

C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
"C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4776
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '' -Value '"C:\Users\Admin\AppData\Roaming\.exe"' -PropertyType 'String'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:216
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  PID:2144
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  PID:4312
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4308
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\guuLs7VEUxAE.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1696
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2220
  - - 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:4412
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:3300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

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

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Downloads

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

Filesize
1KB

MD5
38b07cd5da5c740e9629fd801dc26e5a

SHA1
42816159ab9367165cf58603b09b134d488c1690

SHA256
20049cc7ade63a31f442dfd2b99740f0512fdcc764266b8b105292e30d2b7483

SHA512
1769ffefe181531476e10311295f38d11b85b5ec3710000b5cb081675e5f233792f96bb4178b75fd0e2cfc86965e7368173d22799a1e9fa3317ddd49047fab5a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eicw3zkg.lvi.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\guuLs7VEUxAE.bat

Filesize
215B

MD5
5e9c2372563045270ba64729be906b1f

SHA1
b08e6a5b3890b98c3c9c01dab2499e51a3d82230

SHA256
aa67074690b003df99aa6961d0968dde638f0523ac5e761d9f94468df857a4ce

SHA512
8bfd7fed07ef8f01c046745a8f49f6ee60e3c2161abef21a1b4047e7958f77139906966135d916928eb1bbe06e24b19cd0610d9936c1f6b2453d771ffb617f9d

Download Submit
memory/216-32-0x00000000071B0000-0x00000000071E2000-memory.dmp

Filesize
200KB

Download
memory/216-6-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/216-10-0x0000000005150000-0x0000000005778000-memory.dmp

Filesize
6.2MB

Download
memory/216-33-0x0000000070BC0000-0x0000000070C0C000-memory.dmp

Filesize
304KB

Download
memory/216-12-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/216-44-0x00000000071F0000-0x0000000007293000-memory.dmp

Filesize
652KB

Download
memory/216-66-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/216-43-0x0000000006560000-0x000000000657E000-memory.dmp

Filesize
120KB

Download
memory/216-14-0x0000000005000000-0x0000000005022000-memory.dmp

Filesize
136KB

Download
memory/216-17-0x0000000005990000-0x00000000059F6000-memory.dmp

Filesize
408KB

Download
memory/216-63-0x0000000007650000-0x0000000007672000-memory.dmp

Filesize
136KB

Download
memory/216-15-0x0000000005870000-0x00000000058D6000-memory.dmp

Filesize
408KB

Download
memory/216-5-0x0000000002690000-0x00000000026C6000-memory.dmp

Filesize
216KB

Download
memory/216-62-0x00000000075F0000-0x00000000075F8000-memory.dmp

Filesize
32KB

Download
memory/216-19-0x0000000005A00000-0x0000000005D54000-memory.dmp

Filesize
3.3MB

Download
memory/216-61-0x0000000007610000-0x000000000762A000-memory.dmp

Filesize
104KB

Download
memory/216-60-0x0000000007510000-0x0000000007524000-memory.dmp

Filesize
80KB

Download
memory/216-30-0x0000000005FB0000-0x0000000005FCE000-memory.dmp

Filesize
120KB

Download
memory/216-31-0x0000000006500000-0x000000000654C000-memory.dmp

Filesize
304KB

Download
memory/216-58-0x0000000007500000-0x000000000750E000-memory.dmp

Filesize
56KB

Download
memory/216-9-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/216-51-0x00000000074D0000-0x00000000074E1000-memory.dmp

Filesize
68KB

Download
memory/216-50-0x0000000007550000-0x00000000075E6000-memory.dmp

Filesize
600KB

Download
memory/216-46-0x00000000072D0000-0x00000000072EA000-memory.dmp

Filesize
104KB

Download
memory/216-45-0x0000000007920000-0x0000000007F9A000-memory.dmp

Filesize
6.5MB

Download
memory/216-48-0x0000000007340000-0x000000000734A000-memory.dmp

Filesize
40KB

Download
memory/3300-68-0x00000000006D0000-0x00000000006E2000-memory.dmp

Filesize
72KB

Download
memory/4308-29-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/4308-16-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/4308-49-0x0000000006280000-0x00000000062D0000-memory.dmp

Filesize
320KB

Download
memory/4308-52-0x00000000064E0000-0x0000000006592000-memory.dmp

Filesize
712KB

Download
memory/4308-47-0x00000000066F0000-0x0000000006D08000-memory.dmp

Filesize
6.1MB

Download
memory/4308-57-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/4308-13-0x00000000050F0000-0x0000000005182000-memory.dmp

Filesize
584KB

Download
memory/4308-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/4308-18-0x0000000005280000-0x000000000528A000-memory.dmp

Filesize
40KB

Download
memory/4776-0-0x000000007521E000-0x000000007521F000-memory.dmp

Filesize
4KB

Download
memory/4776-4-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/4776-11-0x0000000075210000-0x00000000759C0000-memory.dmp

Filesize
7.7MB

Download
memory/4776-1-0x00000000005B0000-0x00000000008DE000-memory.dmp

Filesize
3.2MB

Download
memory/4776-2-0x0000000005790000-0x0000000005D34000-memory.dmp

Filesize
5.6MB

Download