quasar | aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7

Analysis

max time kernel
170s
max time network
184s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
12-03-2024 03:02

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General

Target

aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
Size

1.0MB
MD5

e51e1e4a21fef3fd98784683d80b5a02
SHA1

309790387ec94c189ef94803a87fab335159657a
SHA256

aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7
SHA512

329922a8229f6e07f549e8919b4f6e1d60bf7d153b30487c8dde0116d8b31745f88d3f7bf20616d2a88276e8d2c24859e73440a03d4d2ecc08cd207678d84265
SSDEEP

24576:A1QNv9uN9fFNd6AtvbGN/BCfKEPmxKVnRNWg:A1WluN9fZvbGyKFxg

Score

10^/10

quasar pvp2 persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

PVP2

clausetestbits.chickenkiller.com:64598

snoetestbits.ignorelist.com:64598

Mutex

QSR_MUTEX_ttz0i8tcYpqYyKkP3l

Attributes

encryption_key
kxBjTYBAXsyGYsjsYZcL
install_name
mcr.exe
log_directory
Logs
reconnect_delay
3000
startup_key
mcs
subdirectory
mcr

Signatures

Quasar RAT 3 IoCs

Quasar is an open source Remote Access Tool.

trojan spyware quasar

flow	ioc	pid	Process
		936	schtasks.exe
2	ip-api.com		Process not Found
6	api.ipify.org		Process not Found

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2720-6-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2720-9-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2720-13-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

resource	yara_rule
behavioral1/memory/2720-6-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2720-9-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2720-13-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects executables containing common artifacts observed in infostealers 3 IoCs

resource	yara_rule
behavioral1/memory/2720-6-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral1/memory/2720-9-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral1/memory/2720-13-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer

Detects executables packed with ConfuserEx Mod 4 IoCs

resource	yara_rule
behavioral1/memory/2520-0-0x0000000000EC0000-0x0000000000FCA000-memory.dmp	INDICATOR_EXE_Packed_ConfuserEx
behavioral1/memory/2520-4-0x0000000009E70000-0x0000000009F88000-memory.dmp	INDICATOR_EXE_Packed_ConfuserEx
behavioral1/files/0x00240000000122e6-25.dat	INDICATOR_EXE_Packed_ConfuserEx
behavioral1/memory/1884-31-0x0000000000D00000-0x0000000000E0A000-memory.dmp	INDICATOR_EXE_Packed_ConfuserEx

Executes dropped EXE 3 IoCs

pid	Process
1884	mcr.exe
876	mcr.exe
588	mcr.exe

Loads dropped DLL 1 IoCs

pid	Process
2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\mcs = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe\""	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\mcs = "\"C:\\Users\\Admin\\AppData\\Roaming\\mcr\\mcr.exe\""	mcr.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
2	ip-api.com
6	api.ipify.org

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2520 set thread context of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 set thread context of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 1884 set thread context of 876	1884	mcr.exe	35
PID 1884 set thread context of 588	1884	mcr.exe	36

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/Job

T1053

pid	Process
936	schtasks.exe
1672	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
Token: SeDebugPrivilege	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
Token: SeDebugPrivilege	1884	mcr.exe
Token: SeDebugPrivilege	876	mcr.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2720	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	29
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2520 wrote to memory of 2692	2520	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	30
PID 2720 wrote to memory of 936	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	32
PID 2720 wrote to memory of 936	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	32
PID 2720 wrote to memory of 936	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	32
PID 2720 wrote to memory of 936	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	32
PID 2720 wrote to memory of 1884	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	34
PID 2720 wrote to memory of 1884	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	34
PID 2720 wrote to memory of 1884	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	34
PID 2720 wrote to memory of 1884	2720	aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe	34
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 876	1884	mcr.exe	35
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 1884 wrote to memory of 588	1884	mcr.exe	36
PID 876 wrote to memory of 1672	876	mcr.exe	37
PID 876 wrote to memory of 1672	876	mcr.exe	37
PID 876 wrote to memory of 1672	876	mcr.exe	37
PID 876 wrote to memory of 1672	876	mcr.exe	37

C:\Users\Admin\AppData\Local\Temp\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
"C:\Users\Admin\AppData\Local\Temp\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Users\Admin\AppData\Local\Temp\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
  C:\Users\Admin\AppData\Local\Temp\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "mcs" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe" /rl HIGHEST /f
    3⤵
    - Quasar RAT
    - Creates scheduled task(s)
    PID:936
- - C:\Users\Admin\AppData\Roaming\mcr\mcr.exe
    "C:\Users\Admin\AppData\Roaming\mcr\mcr.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1884
  - - C:\Users\Admin\AppData\Roaming\mcr\mcr.exe
      C:\Users\Admin\AppData\Roaming\mcr\mcr.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:876
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "mcs" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\mcr\mcr.exe" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1672
  - - C:\Users\Admin\AppData\Roaming\mcr\mcr.exe
      C:\Users\Admin\AppData\Roaming\mcr\mcr.exe
      4⤵
      Executes dropped EXE
      PID:588
- C:\Users\Admin\AppData\Local\Temp\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
  C:\Users\Admin\AppData\Local\Temp\aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7.exe
  2⤵
  PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\mcr\mcr.exe

Filesize
1.0MB

MD5
e51e1e4a21fef3fd98784683d80b5a02

SHA1
309790387ec94c189ef94803a87fab335159657a

SHA256
aad9903b9803b9a3e2d6c7677d8eb80f537a3543e26725c48dde5e4c53d518b7

SHA512
329922a8229f6e07f549e8919b4f6e1d60bf7d153b30487c8dde0116d8b31745f88d3f7bf20616d2a88276e8d2c24859e73440a03d4d2ecc08cd207678d84265

Download Submit
memory/876-43-0x0000000004A30000-0x0000000004A70000-memory.dmp

Filesize
256KB

Download
memory/876-42-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/876-46-0x0000000004A30000-0x0000000004A70000-memory.dmp

Filesize
256KB

Download
memory/876-45-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/1884-44-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/1884-31-0x0000000000D00000-0x0000000000E0A000-memory.dmp

Filesize
1.0MB

Download
memory/1884-32-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2520-4-0x0000000009E70000-0x0000000009F88000-memory.dmp

Filesize
1.1MB

Download
memory/2520-5-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/2520-18-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2520-0-0x0000000000EC0000-0x0000000000FCA000-memory.dmp

Filesize
1.0MB

Download
memory/2520-3-0x0000000004940000-0x0000000004980000-memory.dmp

Filesize
256KB

Download
memory/2520-2-0x0000000000540000-0x0000000000546000-memory.dmp

Filesize
24KB

Download
memory/2520-1-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2692-17-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2692-19-0x00000000003A0000-0x00000000003E0000-memory.dmp

Filesize
256KB

Download
memory/2692-21-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-20-0x0000000004970000-0x00000000049B0000-memory.dmp

Filesize
256KB

Download
memory/2720-33-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-30-0x0000000004970000-0x00000000049B0000-memory.dmp

Filesize
256KB

Download
memory/2720-22-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-16-0x0000000073FE0000-0x00000000746CE000-memory.dmp

Filesize
6.9MB

Download
memory/2720-13-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2720-9-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2720-6-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads