quasar | 8bc7b03305871f613e3e6435ad6ef4d284350e44f77ee67104bb1d0193557497

General

Target

surrogate.exe
Size

3.1MB
MD5

9fa12d20004165ea56457120cc040515
SHA1

231e35f6914f2acb10d3fb587214bc0c7e4b2cd4
SHA256

8bc7b03305871f613e3e6435ad6ef4d284350e44f77ee67104bb1d0193557497
SHA512

d51db655e00ffcc318e18f61f398206582830836c4a140e19de27b53c3004bcd0fc6a705d5a46dca232af9328de90135040a91253dd550f73311683aaffdf5d2
SSDEEP

49152:3vAz92YpaQI6oPZlhP3ReybewoQmxNESE0k/iVLoGdQTTHHB72eh2NT:3va92YpaQI6oPZlhP3YybewoRxrtg

Score

10^/10

quasar newborn spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

newborn

C2

cock.holyshithowmanydomainandproxycanigettorunmyserver.info:4782

88.209.197.253:4782

Mutex

5680e0b1-d1d4-41d1-ab33-74f7f95f53fd

Attributes

encryption_key
CEAEA9FD2F3E18352164BB4D9A6F56EFF5E2D896
install_name
COM Surrogate.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Update
subdirectory
System32

Signatures

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

Quasar payload 4 IoCs

resource	yara_rule
behavioral1/memory/1988-0-0x0000000001320000-0x0000000001644000-memory.dmp	family_quasar
behavioral1/files/0x00090000000120ed-6.dat	family_quasar
behavioral1/files/0x00090000000120ed-7.dat	family_quasar
behavioral1/memory/2700-9-0x0000000000B70000-0x0000000000E94000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2700	COM Surrogate.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\System32\COM Surrogate.exe	COM Surrogate.exe
File opened for modification	C:\Windows\system32\System32	COM Surrogate.exe
File created	C:\Windows\system32\System32\COM Surrogate.exe	surrogate.exe
File opened for modification	C:\Windows\system32\System32\COM Surrogate.exe	surrogate.exe
File opened for modification	C:\Windows\system32\System32	surrogate.exe

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
2132	schtasks.exe
2760	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1988	surrogate.exe
Token: SeDebugPrivilege	2700	COM Surrogate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2700	COM Surrogate.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 2132	1988	surrogate.exe	29
PID 1988 wrote to memory of 2132	1988	surrogate.exe	29
PID 1988 wrote to memory of 2132	1988	surrogate.exe	29
PID 1988 wrote to memory of 2700	1988	surrogate.exe	30
PID 1988 wrote to memory of 2700	1988	surrogate.exe	30
PID 1988 wrote to memory of 2700	1988	surrogate.exe	30
PID 2700 wrote to memory of 2760	2700	COM Surrogate.exe	31
PID 2700 wrote to memory of 2760	2700	COM Surrogate.exe	31
PID 2700 wrote to memory of 2760	2700	COM Surrogate.exe	31

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\surrogate.exe
"C:\Users\Admin\AppData\Local\Temp\surrogate.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\system32\System32\COM Surrogate.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2132
- C:\Windows\system32\System32\COM Surrogate.exe
  "C:\Windows\system32\System32\COM Surrogate.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\system32\System32\COM Surrogate.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2760

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\System32\COM Surrogate.exe

Filesize
3.1MB

MD5
9fa12d20004165ea56457120cc040515

SHA1
231e35f6914f2acb10d3fb587214bc0c7e4b2cd4

SHA256
8bc7b03305871f613e3e6435ad6ef4d284350e44f77ee67104bb1d0193557497

SHA512
d51db655e00ffcc318e18f61f398206582830836c4a140e19de27b53c3004bcd0fc6a705d5a46dca232af9328de90135040a91253dd550f73311683aaffdf5d2

Download Submit
C:\Windows\system32\System32\COM Surrogate.exe

Filesize
3.1MB

MD5
9fa12d20004165ea56457120cc040515

SHA1
231e35f6914f2acb10d3fb587214bc0c7e4b2cd4

SHA256
8bc7b03305871f613e3e6435ad6ef4d284350e44f77ee67104bb1d0193557497

SHA512
d51db655e00ffcc318e18f61f398206582830836c4a140e19de27b53c3004bcd0fc6a705d5a46dca232af9328de90135040a91253dd550f73311683aaffdf5d2

Download Submit
memory/1988-0-0x0000000001320000-0x0000000001644000-memory.dmp

Filesize
3.1MB

Download
memory/1988-1-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

Filesize
9.9MB

Download
memory/1988-2-0x000000001B350000-0x000000001B3D0000-memory.dmp

Filesize
512KB

Download
memory/1988-10-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

Filesize
9.9MB

Download
memory/2700-8-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

Filesize
9.9MB

Download
memory/2700-9-0x0000000000B70000-0x0000000000E94000-memory.dmp

Filesize
3.1MB

Download
memory/2700-11-0x000000001B0F0000-0x000000001B170000-memory.dmp

Filesize
512KB

Download
memory/2700-12-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads