quasar | 389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87a

Analysis

max time kernel
103s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27-10-2024 16:06

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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

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 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1720-41-0x0000000000400000-0x000000000045E000-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
4864	powershell.exe
4520	powershell.exe

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:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.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
49	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe

description	pid	Process	procid_target
PID 1764 set thread context of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113

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:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exepowershell.exepowershell.exeschtasks.exeRegSvcs.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
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	RegSvcs.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
1644	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exepowershell.exepowershell.exe

pid	Process
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
4520	powershell.exe
4864	powershell.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
4864	powershell.exe
4520	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exepowershell.exepowershell.exeRegSvcs.exe

description	pid	Process
Token: SeDebugPrivilege	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
Token: SeDebugPrivilege	4864	powershell.exe
Token: SeDebugPrivilege	4520	powershell.exe
Token: SeDebugPrivilege	1720	RegSvcs.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe

description	pid	Process	procid_target
PID 1764 wrote to memory of 4864	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	107
PID 1764 wrote to memory of 4864	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	107
PID 1764 wrote to memory of 4864	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	107
PID 1764 wrote to memory of 4520	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	109
PID 1764 wrote to memory of 4520	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	109
PID 1764 wrote to memory of 4520	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	109
PID 1764 wrote to memory of 1644	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	111
PID 1764 wrote to memory of 1644	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	111
PID 1764 wrote to memory of 1644	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	111
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113
PID 1764 wrote to memory of 1720	1764	389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe	113

C:\Users\Admin\AppData\Local\Temp\389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe
"C:\Users\Admin\AppData\Local\Temp\389c77b4d588a7264038f89766fff7cb90e204b1168a05350a61c86c6e70e87aN.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1764
- 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:4864
- 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:4520
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jGqahBGIEd" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAFD3.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1644
- 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:1720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

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\powershell.exe.log

Filesize
2KB

MD5
3d086a433708053f9bf9523e1d87a4e8

SHA1
b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

SHA256
6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

SHA512
931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
6b64b3c650c5d778e89b26f05b2cee52

SHA1
c4a19603993ce0bf3e7ff6dccdc7665388d26c62

SHA256
49b5ff4d18e28a088df0f27ea3f95fbe6afd9960956e32818d89a45882ce405c

SHA512
88ab4520df0e6ddf7859ca1934a346ba7f93e5cb540068a1e2b0b5c8276826f850d9eed51737bdb65364689a2e7a1a9cb88e81903d55af3e9ac3ab9bfbc0199a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0njg4wug.knw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpAFD3.tmp

Filesize
1KB

MD5
487b318a882b4ef93e5e5a057ff5dd37

SHA1
39c3f540c6980effdd21d0ab418080cff59c1f3d

SHA256
a7831c97ef7662d843f61fffe01bba5366cb133a524336b084caffe254ece3b9

SHA512
b6bd15d1e197961eb4e857fbe8e23e1a681b90111706a29f20c2e967a8678bcbd28c65188d466163f8c441bfde00b9d11bd113dc700ce3cc6bec9ddb1081ed0a

Download Submit
memory/1720-41-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1720-49-0x0000000005400000-0x0000000005412000-memory.dmp

Filesize
72KB

Download
memory/1720-75-0x00000000060F0000-0x000000000612C000-memory.dmp

Filesize
240KB

Download
memory/1764-5-0x00000000052D0000-0x00000000052DA000-memory.dmp

Filesize
40KB

Download
memory/1764-8-0x0000000074F3E000-0x0000000074F3F000-memory.dmp

Filesize
4KB

Download
memory/1764-9-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/1764-10-0x0000000006810000-0x00000000068B0000-memory.dmp

Filesize
640KB

Download
memory/1764-11-0x00000000094B0000-0x000000000954C000-memory.dmp

Filesize
624KB

Download
memory/1764-7-0x0000000006AD0000-0x0000000006E24000-memory.dmp

Filesize
3.3MB

Download
memory/1764-6-0x00000000054C0000-0x00000000054D0000-memory.dmp

Filesize
64KB

Download
memory/1764-0-0x0000000074F3E000-0x0000000074F3F000-memory.dmp

Filesize
4KB

Download
memory/1764-4-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/1764-3-0x0000000005210000-0x00000000052A2000-memory.dmp

Filesize
584KB

Download
memory/1764-46-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/1764-2-0x00000000058A0000-0x0000000005E44000-memory.dmp

Filesize
5.6MB

Download
memory/1764-1-0x0000000000770000-0x0000000000842000-memory.dmp

Filesize
840KB

Download
memory/4520-76-0x00000000077D0000-0x00000000077DA000-memory.dmp

Filesize
40KB

Download
memory/4520-61-0x00000000073C0000-0x00000000073DE000-memory.dmp

Filesize
120KB

Download
memory/4520-89-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4520-82-0x0000000007AA0000-0x0000000007ABA000-memory.dmp

Filesize
104KB

Download
memory/4520-21-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4520-81-0x00000000079A0000-0x00000000079B4000-memory.dmp

Filesize
80KB

Download
memory/4520-80-0x0000000007990000-0x000000000799E000-memory.dmp

Filesize
56KB

Download
memory/4520-20-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4520-50-0x00000000073E0000-0x0000000007412000-memory.dmp

Filesize
200KB

Download
memory/4520-51-0x00000000757E0000-0x000000007582C000-memory.dmp

Filesize
304KB

Download
memory/4520-79-0x0000000007960000-0x0000000007971000-memory.dmp

Filesize
68KB

Download
memory/4864-74-0x00000000078E0000-0x00000000078FA000-memory.dmp

Filesize
104KB

Download
memory/4864-48-0x0000000006620000-0x000000000666C000-memory.dmp

Filesize
304KB

Download
memory/4864-29-0x0000000005F00000-0x0000000005F66000-memory.dmp

Filesize
408KB

Download
memory/4864-73-0x0000000007F20000-0x000000000859A000-memory.dmp

Filesize
6.5MB

Download
memory/4864-19-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4864-18-0x0000000005690000-0x0000000005CB8000-memory.dmp

Filesize
6.2MB

Download
memory/4864-77-0x0000000007B60000-0x0000000007BF6000-memory.dmp

Filesize
600KB

Download
memory/4864-62-0x00000000757E0000-0x000000007582C000-memory.dmp

Filesize
304KB

Download
memory/4864-78-0x0000000007AE0000-0x0000000007AF1000-memory.dmp

Filesize
68KB

Download
memory/4864-72-0x00000000075A0000-0x0000000007643000-memory.dmp

Filesize
652KB

Download
memory/4864-47-0x0000000005330000-0x000000000534E000-memory.dmp

Filesize
120KB

Download
memory/4864-23-0x0000000005E30000-0x0000000005E52000-memory.dmp

Filesize
136KB

Download
memory/4864-83-0x0000000007C00000-0x0000000007C08000-memory.dmp

Filesize
32KB

Download
memory/4864-17-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4864-16-0x0000000005020000-0x0000000005056000-memory.dmp

Filesize
216KB

Download
memory/4864-90-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4864-30-0x0000000005F70000-0x0000000005FD6000-memory.dmp

Filesize
408KB

Download