quasar | 2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb

Analysis

max time kernel
132s
max time network
141s
platform
windows10_x64
resource
win10v20201028
submitted
02-03-2021 23:15

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General

Target

2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Size

534KB
MD5

fda53610c25408e427c84eebdc5b8ec2
SHA1

13830e44fb35c5f6d4750abd620ecb4df85e7a6a
SHA256

2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb
SHA512

617b6fb67057c7207cbe9f73be85b6f4d9d69462aee9b526a1bea085d1c101f7ff9da98da6a0e266bd49cafc41c0cdb741453bc76e9c09011bf4f1ec446f52e7

Score

10^/10

quasar venomrat evasion rat rootkit spyware stealer trojan

Malware Config

Signatures

Contains code to disable Windows Defender 2 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral2/files/0x000100000001ab70-13.dat	disable_win_def
behavioral2/files/0x000100000001ab70-15.dat	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat

Executes dropped EXE 1 IoCs

Processes:

Injector.exe

pid	Process
3988	Injector.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.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
11	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

Processes:

schtasks.exeschtasks.exe

pid	Process
1224	schtasks.exe
2108	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
756	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

Processes:

powershell.exe2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

pid	Process
2888	powershell.exe
2888	powershell.exe
2888	powershell.exe
744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
200	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exepowershell.exeInjector.exe2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

description	pid	Process
Token: SeDebugPrivilege	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	3988	Injector.exe
Token: SeDebugPrivilege	3988	Injector.exe
Token: SeDebugPrivilege	200	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exeInjector.execmd.execmd.exe

description	pid	Process	procid_target
PID 744 wrote to memory of 1224	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	76
PID 744 wrote to memory of 1224	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	76
PID 744 wrote to memory of 1224	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	76
PID 744 wrote to memory of 3988	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	78
PID 744 wrote to memory of 3988	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	78
PID 744 wrote to memory of 3988	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	78
PID 744 wrote to memory of 2888	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	79
PID 744 wrote to memory of 2888	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	79
PID 744 wrote to memory of 2888	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	79
PID 3988 wrote to memory of 2108	3988	Injector.exe	81
PID 3988 wrote to memory of 2108	3988	Injector.exe	81
PID 3988 wrote to memory of 2108	3988	Injector.exe	81
PID 744 wrote to memory of 648	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	86
PID 744 wrote to memory of 648	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	86
PID 744 wrote to memory of 648	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	86
PID 648 wrote to memory of 1340	648	cmd.exe	88
PID 648 wrote to memory of 1340	648	cmd.exe	88
PID 648 wrote to memory of 1340	648	cmd.exe	88
PID 744 wrote to memory of 2492	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	89
PID 744 wrote to memory of 2492	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	89
PID 744 wrote to memory of 2492	744	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	89
PID 2492 wrote to memory of 2540	2492	cmd.exe	91
PID 2492 wrote to memory of 2540	2492	cmd.exe	91
PID 2492 wrote to memory of 2540	2492	cmd.exe	91
PID 2492 wrote to memory of 756	2492	cmd.exe	92
PID 2492 wrote to memory of 756	2492	cmd.exe	92
PID 2492 wrote to memory of 756	2492	cmd.exe	92
PID 2492 wrote to memory of 200	2492	cmd.exe	93
PID 2492 wrote to memory of 200	2492	cmd.exe	93
PID 2492 wrote to memory of 200	2492	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
"C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe"
1⤵
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:744
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Injector" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1224
- C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3988
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Injector" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2108
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2888
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:648
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1340
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\xzyjMctN7rTg.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2492
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2540
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:756
- - C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
    "C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:200

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

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\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe.log

MD5
1efce85e583a7a2f123317a20f889d04

SHA1
60f71aa73ea2e2a48ed1c17e3c6d440abf39c914

SHA256
2b5532a94879134a876b11c188ade1a61deaba6a80fe1f3a3a77cc442f1cca0d

SHA512
45a5cd283e6a6ac34c3d8b1a6d73dc1cf52d8c974cf84624e8e9924eddaf354ccda929bce728b47db2b62175e47bdc3eaca6bc6b84d3565881fa87c50319d24c

Download Submit
C:\Users\Admin\AppData\Local\Temp\xzyjMctN7rTg.bat

MD5
f9602457bd9344ccb1a20b169478e1e0

SHA1
3b2b85fc68c6d2f23b5ca8de3d9818c2e60d72b5

SHA256
4dab82d2938558fcd78354e25d1ccb08d8d6802a33e3f4a959d18fa7a9524d6b

SHA512
703dbf7ca284336aa0e20eae41245d0cce7ee9c7ccad7add7e4629ef571edc83b8b024e4073fce8d2892e3290792b43d3b700fc30b3b858250051787503d8945

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe

MD5
fda53610c25408e427c84eebdc5b8ec2

SHA1
13830e44fb35c5f6d4750abd620ecb4df85e7a6a

SHA256
2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb

SHA512
617b6fb67057c7207cbe9f73be85b6f4d9d69462aee9b526a1bea085d1c101f7ff9da98da6a0e266bd49cafc41c0cdb741453bc76e9c09011bf4f1ec446f52e7

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe

MD5
fda53610c25408e427c84eebdc5b8ec2

SHA1
13830e44fb35c5f6d4750abd620ecb4df85e7a6a

SHA256
2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb

SHA512
617b6fb67057c7207cbe9f73be85b6f4d9d69462aee9b526a1bea085d1c101f7ff9da98da6a0e266bd49cafc41c0cdb741453bc76e9c09011bf4f1ec446f52e7

Download Submit
memory/200-69-0x0000000004C10000-0x0000000004C11000-memory.dmp

Filesize
4KB

Download
memory/200-62-0x0000000000000000-mapping.dmp

Download
memory/200-64-0x0000000073AC0000-0x00000000741AE000-memory.dmp

Filesize
6.9MB

Download
memory/648-55-0x0000000000000000-mapping.dmp

Download
memory/744-8-0x0000000005A90000-0x0000000005A91000-memory.dmp

Filesize
4KB

Download
memory/744-10-0x0000000006A00000-0x0000000006A01000-memory.dmp

Filesize
4KB

Download
memory/744-9-0x0000000006630000-0x0000000006631000-memory.dmp

Filesize
4KB

Download
memory/744-7-0x0000000005830000-0x0000000005831000-memory.dmp

Filesize
4KB

Download
memory/744-6-0x00000000058F0000-0x00000000058F1000-memory.dmp

Filesize
4KB

Download
memory/744-2-0x0000000073AC0000-0x00000000741AE000-memory.dmp

Filesize
6.9MB

Download
memory/744-5-0x0000000005DF0000-0x0000000005DF1000-memory.dmp

Filesize
4KB

Download
memory/744-3-0x0000000000FE0000-0x0000000000FE1000-memory.dmp

Filesize
4KB

Download
memory/756-61-0x0000000000000000-mapping.dmp

Download
memory/1224-11-0x0000000000000000-mapping.dmp

Download
memory/1340-56-0x0000000000000000-mapping.dmp

Download
memory/2108-37-0x0000000000000000-mapping.dmp

Download
memory/2492-58-0x0000000000000000-mapping.dmp

Download
memory/2540-60-0x0000000000000000-mapping.dmp

Download
memory/2888-51-0x00000000098E0000-0x00000000098E1000-memory.dmp

Filesize
4KB

Download
memory/2888-30-0x0000000004CB2000-0x0000000004CB3000-memory.dmp

Filesize
4KB

Download
memory/2888-32-0x0000000008770000-0x0000000008771000-memory.dmp

Filesize
4KB

Download
memory/2888-35-0x00000000086D0000-0x00000000086D1000-memory.dmp

Filesize
4KB

Download
memory/2888-28-0x0000000004CB0000-0x0000000004CB1000-memory.dmp

Filesize
4KB

Download
memory/2888-39-0x0000000009650000-0x0000000009683000-memory.dmp

Filesize
204KB

Download
memory/2888-46-0x0000000009610000-0x0000000009611000-memory.dmp

Filesize
4KB

Download
memory/2888-47-0x0000000009780000-0x0000000009781000-memory.dmp

Filesize
4KB

Download
memory/2888-48-0x0000000009930000-0x0000000009931000-memory.dmp

Filesize
4KB

Download
memory/2888-49-0x000000007EC90000-0x000000007EC91000-memory.dmp

Filesize
4KB

Download
memory/2888-50-0x0000000004CB3000-0x0000000004CB4000-memory.dmp

Filesize
4KB

Download
memory/2888-31-0x0000000007730000-0x0000000007731000-memory.dmp

Filesize
4KB

Download
memory/2888-53-0x00000000098D0000-0x00000000098D1000-memory.dmp

Filesize
4KB

Download
memory/2888-29-0x0000000007F90000-0x0000000007F91000-memory.dmp

Filesize
4KB

Download
memory/2888-26-0x0000000007750000-0x0000000007751000-memory.dmp

Filesize
4KB

Download
memory/2888-14-0x0000000000000000-mapping.dmp

Download
memory/2888-25-0x00000000075D0000-0x00000000075D1000-memory.dmp

Filesize
4KB

Download
memory/2888-24-0x0000000007860000-0x0000000007861000-memory.dmp

Filesize
4KB

Download
memory/2888-23-0x0000000004B90000-0x0000000004B91000-memory.dmp

Filesize
4KB

Download
memory/2888-21-0x0000000073AC0000-0x00000000741AE000-memory.dmp

Filesize
6.9MB

Download
memory/3988-22-0x0000000004B20000-0x0000000004B21000-memory.dmp

Filesize
4KB

Download
memory/3988-57-0x0000000005F70000-0x0000000005F71000-memory.dmp

Filesize
4KB

Download
memory/3988-16-0x0000000073AC0000-0x00000000741AE000-memory.dmp

Filesize
6.9MB

Download
memory/3988-12-0x0000000000000000-mapping.dmp

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