quasar | 78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-12-2024 06:36

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General

Target

svhost.exe
Size

502KB
MD5

e3cfe28100238a1001c8cca4af39c574
SHA1

9b80ea180a8f4cec6f787b6b57e51dc10e740f75
SHA256

78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12
SHA512

511e8a150d6539f555470367933e5f35b00d129d3ed3e97954da57f402d18711dfc86c93acc26f5c2b1b18bd554b8ea4af1ad541cd2564b793acc65251757324
SSDEEP

6144:xTEgdc0YtX7IxUpGREWutr/mrBcgP+cbbWTtySdcE8Ob8F7mvAXi8exPLcTR3y:xTEgdfY2xUT/FxqWTtnMpSvADmcdy

Score

10^/10

quasar svhost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

svhost

151.177.61.79:4782

Mutex

a148a6d8-1253-4e62-bc5f-c0242dd62e69

Attributes

encryption_key
5BEC1A8BC6F8F695D1337C51454E0B7F3A4FE968
install_name
svhost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svhost
subdirectory
svhost

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/4188-1-0x00000000004A0000-0x0000000000524000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b91-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1952	svhost.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
1216	schtasks.exe
4008	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4188	svhost.exe
Token: SeDebugPrivilege	1952	svhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4188 wrote to memory of 1216	4188	svhost.exe	82
PID 4188 wrote to memory of 1216	4188	svhost.exe	82
PID 4188 wrote to memory of 1952	4188	svhost.exe	84
PID 4188 wrote to memory of 1952	4188	svhost.exe	84
PID 1952 wrote to memory of 4008	1952	svhost.exe	85
PID 1952 wrote to memory of 4008	1952	svhost.exe	85

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\svhost.exe
"C:\Users\Admin\AppData\Local\Temp\svhost.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4188
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\svhost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1216
- C:\Users\Admin\AppData\Roaming\svhost\svhost.exe
  "C:\Users\Admin\AppData\Roaming\svhost\svhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\svhost\svhost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4008

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\svhost\svhost.exe

Filesize
502KB

MD5
e3cfe28100238a1001c8cca4af39c574

SHA1
9b80ea180a8f4cec6f787b6b57e51dc10e740f75

SHA256
78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12

SHA512
511e8a150d6539f555470367933e5f35b00d129d3ed3e97954da57f402d18711dfc86c93acc26f5c2b1b18bd554b8ea4af1ad541cd2564b793acc65251757324

Download Submit
memory/1952-9-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/1952-10-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/1952-11-0x000000001BC40000-0x000000001BC90000-memory.dmp

Filesize
320KB

Download
memory/1952-12-0x000000001BD50000-0x000000001BE02000-memory.dmp

Filesize
712KB

Download
memory/1952-13-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/4188-0-0x00007FFA8A943000-0x00007FFA8A945000-memory.dmp

Filesize
8KB

Download
memory/4188-1-0x00000000004A0000-0x0000000000524000-memory.dmp

Filesize
528KB

Download
memory/4188-2-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download
memory/4188-8-0x00007FFA8A940000-0x00007FFA8B401000-memory.dmp

Filesize
10.8MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads