quasar | 389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87a

General

Target

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
Size

816KB
MD5

11ec645f6c65c2a60ac9c8076511e460
SHA1

6095caa8b0790e6acf1354f03d7b9f96068c3c77
SHA256

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87a
SHA512

0e8be6b5cdd90b78046e015ee899dc43d88358d4c840477a1cbc10cd40144e67c23326861639fd96c5d93571b479d1494b61313e34a3fb3bff0f10207cbdf2a4
SSDEEP

24576:mElnsFEcdvyHasjGX+oDeYVfh+vnkm51sdyU:HlnszqCXPeYckW1sdyU

Score

10^/10

quasar office04 discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

ronymahmoud.casacam.net:4782

sk.servemp3.com:4782

Mutex

QSR_MUTEX_ewyaHKCedalfiUvTpL

Attributes

encryption_key
6LTEKnkEacVI1BGQJRaJ
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 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2868-27-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2868-30-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2868-28-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2868-24-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2868-22-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

Processes:

powershell.exepowershell.exe

pid	Process
2804	powershell.exe
896	powershell.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 1 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe

description	pid	Process	procid_target
PID 2412 set thread context of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35

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 5 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.exeschtasks.exepowershell.exeRegSvcs.exe389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.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
2752	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exepowershell.exepowershell.exe

pid	Process
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
896	powershell.exe
2804	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exepowershell.exepowershell.exeRegSvcs.exe

description	pid	Process
Token: SeDebugPrivilege	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
Token: SeDebugPrivilege	896	powershell.exe
Token: SeDebugPrivilege	2804	powershell.exe
Token: SeDebugPrivilege	2868	RegSvcs.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe

description	pid	Process	procid_target
PID 2412 wrote to memory of 2804	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	29
PID 2412 wrote to memory of 2804	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	29
PID 2412 wrote to memory of 2804	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	29
PID 2412 wrote to memory of 2804	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	29
PID 2412 wrote to memory of 896	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	31
PID 2412 wrote to memory of 896	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	31
PID 2412 wrote to memory of 896	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	31
PID 2412 wrote to memory of 896	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	31
PID 2412 wrote to memory of 2752	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	32
PID 2412 wrote to memory of 2752	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	32
PID 2412 wrote to memory of 2752	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	32
PID 2412 wrote to memory of 2752	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	32
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35
PID 2412 wrote to memory of 2868	2412	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	35

C:\Users\Admin\AppData\Local\Temp\389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
"C:\Users\Admin\AppData\Local\Temp\389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2804
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\jGqahBGIEd.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:896
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jGqahBGIEd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp37C3.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2752
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp37C3.tmp

Filesize
1KB

MD5
9540d6314e909ccf1b8c3b1674e64824

SHA1
6eb54b3dc577906d22fde8f3e427425f8565f3f4

SHA256
2d0d7748598e1fea5807ec9172890ca2a165808e4efd2cbf95f767250a7fe6d0

SHA512
565757afa3a4e16bb080b2072be698aa7ca1375e36eb82c284cc9bc2b1ee39721e2902805ad13d309749120a71ef8b8bd0560c3384e25b86dc95cd9e639e6f3f

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\W9JRVCFKAXJEY8UU0R7G.temp

Filesize
7KB

MD5
12cfb652e06e072c8b0bd25a31ce60be

SHA1
d5ef21e7915cdef11ffecf5b826123dab715e508

SHA256
4c4143459e545688d89d469e204c560dc2567d520e724ae6fb59b176a82dc9dc

SHA512
d64fe7c7e461f45d2a5107b05e621e900a78ac637f40cfb11301488dd5f1ea230330658f10983bb6321b2b5a56dd4f08c665363240986e09f1f8c59d926f241f

Download Submit
memory/2412-31-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2412-1-0x0000000000390000-0x0000000000462000-memory.dmp

Filesize
840KB

Download
memory/2412-2-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2412-3-0x0000000000660000-0x0000000000670000-memory.dmp

Filesize
64KB

Download
memory/2412-4-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2412-5-0x0000000005600000-0x00000000056A0000-memory.dmp

Filesize
640KB

Download
memory/2412-0-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/2868-18-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2868-30-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2868-28-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2868-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2868-24-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2868-22-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2868-20-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2868-27-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads