quasar | 4ca77febd10fb2e3a0ebd202ffd7efb798912d80c76ebdbc76b68b7b59de115a

General

Target

Client-built.exe
Size

348KB
MD5

1b3caea7f3034ec10eecb722a369c652
SHA1

7bf564e5695c879a823068f19b9c5b25d9c3ed53
SHA256

4ca77febd10fb2e3a0ebd202ffd7efb798912d80c76ebdbc76b68b7b59de115a
SHA512

96d59d9a0bca26121ea0643840a3c568fb5ee5fa21cb4e6278cb229ad9b34c9445c22f406daa3c8c11f84f30995064612a1e24eff3211878eae2fd5c5b81a646
SSDEEP

6144:9MNHXf500ME3EaGbbJ23fR34sZh85r+UxRXNO:ud50LNqR3nh8l+UxRXNO

Score

10^/10

quasar meedo discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Meedo

C2

2.tcp.eu.ngrok.io:8080

2.tcp.eu.ngrok.io:13677

Mutex

QSR_MUTEX_F7GTMqsQBGCZlMGQ5p

Attributes

encryption_key
U2vyTIQERz1Bf5527M3K
install_name
win.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Runtime
subdirectory
Subdir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/1724-1-0x0000000000A90000-0x0000000000AEE000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cc4-11.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4524	win.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
17	2.tcp.eu.ngrok.io

Looks up external IP address via web service 1 IoCs

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

flow	ioc
12	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 4 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	Client-built.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
1044	schtasks.exe
2304	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1724	Client-built.exe
Token: SeDebugPrivilege	4524	win.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4524	win.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 1044	1724	Client-built.exe	83
PID 1724 wrote to memory of 1044	1724	Client-built.exe	83
PID 1724 wrote to memory of 1044	1724	Client-built.exe	83
PID 1724 wrote to memory of 4524	1724	Client-built.exe	85
PID 1724 wrote to memory of 4524	1724	Client-built.exe	85
PID 1724 wrote to memory of 4524	1724	Client-built.exe	85
PID 4524 wrote to memory of 2304	4524	win.exe	86
PID 4524 wrote to memory of 2304	4524	win.exe	86
PID 4524 wrote to memory of 2304	4524	win.exe	86

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Runtime" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1044
- C:\Users\Admin\AppData\Roaming\Subdir\win.exe
  "C:\Users\Admin\AppData\Roaming\Subdir\win.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4524
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Runtime" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Subdir\win.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2304

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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 Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Subdir\win.exe

Filesize
348KB

MD5
1b3caea7f3034ec10eecb722a369c652

SHA1
7bf564e5695c879a823068f19b9c5b25d9c3ed53

SHA256
4ca77febd10fb2e3a0ebd202ffd7efb798912d80c76ebdbc76b68b7b59de115a

SHA512
96d59d9a0bca26121ea0643840a3c568fb5ee5fa21cb4e6278cb229ad9b34c9445c22f406daa3c8c11f84f30995064612a1e24eff3211878eae2fd5c5b81a646

Download Submit
memory/1724-6-0x0000000006210000-0x0000000006222000-memory.dmp

Filesize
72KB

Download
memory/1724-2-0x0000000005A20000-0x0000000005FC4000-memory.dmp

Filesize
5.6MB

Download
memory/1724-3-0x00000000055B0000-0x0000000005642000-memory.dmp

Filesize
584KB

Download
memory/1724-4-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download
memory/1724-5-0x0000000005510000-0x0000000005576000-memory.dmp

Filesize
408KB

Download
memory/1724-0-0x000000007465E000-0x000000007465F000-memory.dmp

Filesize
4KB

Download
memory/1724-7-0x0000000006750000-0x000000000678C000-memory.dmp

Filesize
240KB

Download
memory/1724-1-0x0000000000A90000-0x0000000000AEE000-memory.dmp

Filesize
376KB

Download
memory/1724-14-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download
memory/4524-15-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download
memory/4524-16-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download
memory/4524-18-0x0000000006370000-0x000000000637A000-memory.dmp

Filesize
40KB

Download
memory/4524-19-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads