quasar | 124eb5a9a5cc2692be7765cac6afdb191ec0eb8e860f5cd12c311299df10fe17

Analysis

max time kernel
95s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
15-01-2025 02:10

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General

Target

RFQ.exe
Size

3.8MB
MD5

df29ee043d88f265cd76747f62ab3ea7
SHA1

0594a814e05c80618a72a865fa53d24fd351db5b
SHA256

1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0
SHA512

7826bc0582819fb165b25c21fd5a9385b47332201a464b8ae4a035d65f0b3c7ece75507ba0acfa92a6e8b55f2a18ba83344dbf3db264be7d43d3beb5796384a1
SSDEEP

98304:WhZ14lAzlFFzMsYLtZvQ1pVjLvAMQkWS27MtXE:WhZ1AAvFzMBNQTBIMQkXtX

Score

10^/10

quasar gasplant discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

gasplant

toolsbox.ydns.eu:20901

Mutex

33714128-68e4-4509-bd32-b7e414783d3eDtWike

Attributes

encryption_key
43CBFE44C367A91A79A79C9E1778A82D0B498870
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

resource	yara_rule
behavioral2/memory/2956-43-0x0000000000400000-0x0000000000724000-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

pid	Process
1520	powershell.exe
1080	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	RFQ.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2288 set thread context of 2956	2288	RFQ.exe	95

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 6 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

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	RFQ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3652	schtasks.exe
4964	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1520	powershell.exe
1080	powershell.exe
1520	powershell.exe
1080	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	powershell.exe
Token: SeDebugPrivilege	1080	powershell.exe
Token: SeDebugPrivilege	2956	RFQ.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 1520	2288	RFQ.exe	89
PID 2288 wrote to memory of 1520	2288	RFQ.exe	89
PID 2288 wrote to memory of 1520	2288	RFQ.exe	89
PID 2288 wrote to memory of 1080	2288	RFQ.exe	91
PID 2288 wrote to memory of 1080	2288	RFQ.exe	91
PID 2288 wrote to memory of 1080	2288	RFQ.exe	91
PID 2288 wrote to memory of 3652	2288	RFQ.exe	93
PID 2288 wrote to memory of 3652	2288	RFQ.exe	93
PID 2288 wrote to memory of 3652	2288	RFQ.exe	93
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2288 wrote to memory of 2956	2288	RFQ.exe	95
PID 2956 wrote to memory of 4964	2956	RFQ.exe	96
PID 2956 wrote to memory of 4964	2956	RFQ.exe	96
PID 2956 wrote to memory of 4964	2956	RFQ.exe	96

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2288
- 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\RFQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1520
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OLHTuSLw.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1080
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE203.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3652
- C:\Users\Admin\AppData\Local\Temp\RFQ.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2956
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4964

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

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Downloads

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

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

Filesize
18KB

MD5
674eafdd2cc45ca0bafcf1602830f921

SHA1
55ee46d045ec65a7fbfdaeadc61ecece948066b8

SHA256
c62589745de33b572a825c26d8909036e405b385f0d7c7330555d5c12361d7be

SHA512
ee791e563ce22f13c1b68e0c416f2d8d6d3134634b5b5d23ae0e3177b20db3492f2a5d43a1f66d2feb66c0f95ca342480f30fbe60b7fac79d294215742b535fb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cx3u0zrw.vq4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE203.tmp

Filesize
1KB

MD5
7bb2b321ddbb5bdb97d644f3295dba53

SHA1
30bf01385e3ea93eb72ef986b9b651740e81109e

SHA256
cf5f0c709d15bdbd8f52cf4185b695af6a6c9918c1d74277eab3be35a1d35541

SHA512
698761b14fc3b0fead37f68ae9a3470c391ace895c653966ff55e2609fdc116a65a00aff7f7edb869276f4c212f0728f4eac1c8d3ae4b6756e1b1f8c7e87c42c

Download Submit
memory/1080-90-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1080-82-0x0000000007910000-0x0000000007924000-memory.dmp

Filesize
80KB

Download
memory/1080-81-0x0000000007900000-0x000000000790E000-memory.dmp

Filesize
56KB

Download
memory/1080-66-0x00000000715D0000-0x000000007161C000-memory.dmp

Filesize
304KB

Download
memory/1080-83-0x0000000007A10000-0x0000000007A2A000-memory.dmp

Filesize
104KB

Download
memory/1080-36-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1080-35-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1080-29-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1080-84-0x00000000079F0000-0x00000000079F8000-memory.dmp

Filesize
32KB

Download
memory/1520-16-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1520-54-0x00000000715D0000-0x000000007161C000-memory.dmp

Filesize
304KB

Download
memory/1520-18-0x00000000053E0000-0x0000000005A08000-memory.dmp

Filesize
6.2MB

Download
memory/1520-17-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1520-22-0x0000000005B60000-0x0000000005BC6000-memory.dmp

Filesize
408KB

Download
memory/1520-21-0x0000000005A80000-0x0000000005AE6000-memory.dmp

Filesize
408KB

Download
memory/1520-20-0x00000000052D0000-0x00000000052F2000-memory.dmp

Filesize
136KB

Download
memory/1520-91-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1520-34-0x0000000005BD0000-0x0000000005F24000-memory.dmp

Filesize
3.3MB

Download
memory/1520-15-0x0000000002870000-0x00000000028A6000-memory.dmp

Filesize
216KB

Download
memory/1520-80-0x00000000076D0000-0x00000000076E1000-memory.dmp

Filesize
68KB

Download
memory/1520-79-0x0000000007750000-0x00000000077E6000-memory.dmp

Filesize
600KB

Download
memory/1520-78-0x0000000007540000-0x000000000754A000-memory.dmp

Filesize
40KB

Download
memory/1520-77-0x00000000074D0000-0x00000000074EA000-memory.dmp

Filesize
104KB

Download
memory/1520-50-0x0000000006190000-0x00000000061AE000-memory.dmp

Filesize
120KB

Download
memory/1520-51-0x0000000006780000-0x00000000067CC000-memory.dmp

Filesize
304KB

Download
memory/1520-53-0x0000000007370000-0x00000000073A2000-memory.dmp

Filesize
200KB

Download
memory/1520-19-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/1520-64-0x0000000006720000-0x000000000673E000-memory.dmp

Filesize
120KB

Download
memory/1520-65-0x00000000073B0000-0x0000000007453000-memory.dmp

Filesize
652KB

Download
memory/1520-76-0x0000000007B10000-0x000000000818A000-memory.dmp

Filesize
6.5MB

Download
memory/2288-6-0x0000000008430000-0x00000000084CC000-memory.dmp

Filesize
624KB

Download
memory/2288-49-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/2288-9-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/2288-10-0x00000000085D0000-0x0000000008938000-memory.dmp

Filesize
3.4MB

Download
memory/2288-7-0x0000000007F60000-0x0000000007F7A000-memory.dmp

Filesize
104KB

Download
memory/2288-8-0x0000000074DEE000-0x0000000074DEF000-memory.dmp

Filesize
4KB

Download
memory/2288-4-0x0000000074DE0000-0x0000000075590000-memory.dmp

Filesize
7.7MB

Download
memory/2288-5-0x00000000052F0000-0x00000000052FA000-memory.dmp

Filesize
40KB

Download
memory/2288-3-0x0000000005330000-0x00000000053C2000-memory.dmp

Filesize
584KB

Download
memory/2288-2-0x00000000058E0000-0x0000000005E84000-memory.dmp

Filesize
5.6MB

Download
memory/2288-1-0x0000000000520000-0x00000000008F0000-memory.dmp

Filesize
3.8MB

Download
memory/2288-0-0x0000000074DEE000-0x0000000074DEF000-memory.dmp

Filesize
4KB

Download
memory/2956-43-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download