quasar | ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d

General

Target

a.exe
Size

3.1MB
MD5

cc3ea796575dfcf9944dc2b100b88030
SHA1

1af5febda7a5380c9be9b56d9552b38427a1b3a4
SHA256

ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d
SHA512

3c97296a50022b5d8ff7ab1811521d1da02a47691197ea1fb3a61160c02f19658f051216bcd81bbaf6e4929a9643e96451febdcc34e4d4c85430fb3572f964aa
SSDEEP

49152:uv0t62XlaSFNWPjljiFa2RoUYIFxPEak5k/LCtoGdNTHHB72eh2NT:uvo62XlaSFNWPjljiFXRoUYIFxbo

Score

10^/10

quasar 1st spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

1st

C2

172.234.16.71:4444

Mutex

0af47b97-43c7-4ab0-95a1-8d9a9a8f797f

Attributes

encryption_key
B60DF71C950D2BE72D00A583D2E2E6202680FD45
install_name
Client.exe
log_directory
Logs
reconnect_delay
10
startup_key
gg
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral2/memory/2900-0-0x00000000006E0000-0x0000000000A04000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023033-5.dat	family_quasar
behavioral2/files/0x000b000000023033-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
248	Client.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	a.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	a.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
4260	schtasks.exe
3068	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2900	a.exe
Token: SeDebugPrivilege	248	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
248	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
248	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
248	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 4260	2900	a.exe	88
PID 2900 wrote to memory of 4260	2900	a.exe	88
PID 2900 wrote to memory of 248	2900	a.exe	90
PID 2900 wrote to memory of 248	2900	a.exe	90
PID 248 wrote to memory of 3068	248	Client.exe	92
PID 248 wrote to memory of 3068	248	Client.exe	92

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\a.exe
"C:\Users\Admin\AppData\Local\Temp\a.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "gg" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:4260
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:248
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "gg" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:3068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Client.exe

Filesize
3.1MB

MD5
cc3ea796575dfcf9944dc2b100b88030

SHA1
1af5febda7a5380c9be9b56d9552b38427a1b3a4

SHA256
ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d

SHA512
3c97296a50022b5d8ff7ab1811521d1da02a47691197ea1fb3a61160c02f19658f051216bcd81bbaf6e4929a9643e96451febdcc34e4d4c85430fb3572f964aa

Download Submit
C:\Windows\system32\SubDir\Client.exe

Filesize
3.1MB

MD5
cc3ea796575dfcf9944dc2b100b88030

SHA1
1af5febda7a5380c9be9b56d9552b38427a1b3a4

SHA256
ea38cf7b0c86d4ac03a1f48d1675c0ee227dcbed89d073b3a67f65774c7f956d

SHA512
3c97296a50022b5d8ff7ab1811521d1da02a47691197ea1fb3a61160c02f19658f051216bcd81bbaf6e4929a9643e96451febdcc34e4d4c85430fb3572f964aa

Download Submit
memory/248-12-0x00007FFA25FE0000-0x00007FFA26AA1000-memory.dmp

Filesize
10.8MB

Download
memory/248-9-0x00007FFA25FE0000-0x00007FFA26AA1000-memory.dmp

Filesize
10.8MB

Download
memory/248-10-0x0000000001640000-0x0000000001650000-memory.dmp

Filesize
64KB

Download
memory/248-13-0x0000000001640000-0x0000000001650000-memory.dmp

Filesize
64KB

Download
memory/248-14-0x000000001C690000-0x000000001C6E0000-memory.dmp

Filesize
320KB

Download
memory/248-15-0x000000001C7A0000-0x000000001C852000-memory.dmp

Filesize
712KB

Download
memory/2900-3-0x00007FFA25FE0000-0x00007FFA26AA1000-memory.dmp

Filesize
10.8MB

Download
memory/2900-2-0x000000001B750000-0x000000001B760000-memory.dmp

Filesize
64KB

Download
memory/2900-1-0x00007FFA25FE0000-0x00007FFA26AA1000-memory.dmp

Filesize
10.8MB

Download
memory/2900-11-0x00007FFA25FE0000-0x00007FFA26AA1000-memory.dmp

Filesize
10.8MB

Download
memory/2900-0-0x00000000006E0000-0x0000000000A04000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads