quasar | 16146c8f8509d561fd958e0e449806e201c9b162038b39544d8ceefa4a17d460

General

Target

svchost.exe
Size

3.1MB
MD5

e37749aa169a0e99033fcbb2a115690b
SHA1

ec10e98852491d8312c7d575755b4ddb63799170
SHA256

16146c8f8509d561fd958e0e449806e201c9b162038b39544d8ceefa4a17d460
SHA512

f7301d801a8559bf75365d19ee83112ebedbbd6c17e45e4ef6c67a5b5636945bb4d28b6c3340549dc8a113c7aadb82ac809dc27c07eb72f864871986bef240ec
SSDEEP

49152:fv+lL26AaNeWgPhlmVqvMQ7XSK2lRJ6cbR3LoGdoTHHB72eh2NT:fvuL26AaNeWgPhlmVqkQ7XSK2lRJ6m

Score

10^/10

quasar svchost discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost

C2

192.168.150.128:443

Mutex

8c51cc91-2010-4f25-b0cb-831824902ce5

Attributes

encryption_key
AD57652772C12EC255BB6DF4385E6327DCCF50D6
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Realtek HD Audio Universal Service
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/2476-1-0x00000000003A0000-0x00000000006C4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023dde-5.dat	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
45	4780	Process not Found

Executes dropped EXE 1 IoCs

pid	Process
3380	svchost.exe

Drops file in System32 directory 5 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 1 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	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
668	MicrosoftEdgeUpdate.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
2132	schtasks.exe
2652	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2476	svchost.exe
Token: SeDebugPrivilege	3380	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2476 wrote to memory of 2132	2476	svchost.exe	89
PID 2476 wrote to memory of 2132	2476	svchost.exe	89
PID 2476 wrote to memory of 3380	2476	svchost.exe	91
PID 2476 wrote to memory of 3380	2476	svchost.exe	91
PID 3380 wrote to memory of 2652	3380	svchost.exe	92
PID 3380 wrote to memory of 2652	3380	svchost.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\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2476
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Realtek HD Audio Universal Service" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2132
- C:\Windows\system32\SubDir\svchost.exe
  "C:\Windows\system32\SubDir\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3380
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Realtek HD Audio Universal Service" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2652

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU5ODUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODQ0NDQzNjAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MjM4OTE1NjEzIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:668

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

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Windows\System32\SubDir\svchost.exe

Filesize
3.1MB

MD5
e37749aa169a0e99033fcbb2a115690b

SHA1
ec10e98852491d8312c7d575755b4ddb63799170

SHA256
16146c8f8509d561fd958e0e449806e201c9b162038b39544d8ceefa4a17d460

SHA512
f7301d801a8559bf75365d19ee83112ebedbbd6c17e45e4ef6c67a5b5636945bb4d28b6c3340549dc8a113c7aadb82ac809dc27c07eb72f864871986bef240ec

Download Submit
memory/2476-0-0x00007FF8CCD93000-0x00007FF8CCD95000-memory.dmp

Filesize
8KB

Download
memory/2476-1-0x00000000003A0000-0x00000000006C4000-memory.dmp

Filesize
3.1MB

Download
memory/3380-9-0x00007FF8CCD90000-0x00007FF8CD851000-memory.dmp

Filesize
10.8MB

Download
memory/3380-10-0x000000001BDA0000-0x000000001BDF0000-memory.dmp

Filesize
320KB

Download
memory/3380-11-0x000000001D610000-0x000000001D6C2000-memory.dmp

Filesize
712KB

Download
memory/3380-12-0x00007FF8CCD90000-0x00007FF8CD851000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads