quasar | f5625c4c1da453f6fbcce1723fb5e0f96e5bea9e3c05fa30ed5387e2688c4a5c

General

Target

Synapse Loader.exe
Size

3.1MB
MD5

8cff9bae2bc1b05b8b4dd4ab5946c8b7
SHA1

93369919961d4f4cbaa65e7728ead8fd9d4dea93
SHA256

ae1b306c87730bbf7b1cd56f687903f396f8295d7d128c9897ebb5fb0ad14933
SHA512

73a9969b7dcda426b09a2a8566ed8c466e30752a161eade7e331743946d4cbcff589e3ec79d72f4b3ebb3e0e4a6665de29b87b409e7b4944d170518c0186a85e
SSDEEP

49152:avct62XlaSFNWPjljiFa2RoUYIkxxNESETk/itLoGdyOsTHHB72eh2NT:avg62XlaSFNWPjljiFXRoUYISxal5

Score

10^/10

quasar svhost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svhost

C2

vnt-39824.portmap.host:39824

Mutex

a8e213b3-b8da-419b-8e37-bca8a65bb11c

Attributes

encryption_key
20999754454467FF7C9649079A3ADDFF8252D170
install_name
svhost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svhost
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/5072-1-0x0000000000D70000-0x0000000001094000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023c9b-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4732	svhost.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\SubDir\svhost.exe	Synapse Loader.exe
File opened for modification	C:\Program Files\SubDir\svhost.exe	Synapse Loader.exe

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

System Information Discovery
T1082

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
4496	schtasks.exe
2024	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5072	Synapse Loader.exe
Token: SeDebugPrivilege	4732	svhost.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe
4732	svhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4732	svhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5072 wrote to memory of 4496	5072	Synapse Loader.exe	82
PID 5072 wrote to memory of 4496	5072	Synapse Loader.exe	82
PID 5072 wrote to memory of 4732	5072	Synapse Loader.exe	84
PID 5072 wrote to memory of 4732	5072	Synapse Loader.exe	84
PID 4732 wrote to memory of 2024	4732	svhost.exe	85
PID 4732 wrote to memory of 2024	4732	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\Synapse Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Synapse Loader.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5072
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Program Files\SubDir\svhost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4496
- C:\Program Files\SubDir\svhost.exe
  "C:\Program Files\SubDir\svhost.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:4732
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Program Files\SubDir\svhost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2024

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4360

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 Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\SubDir\svhost.exe

Filesize
3.1MB

MD5
8cff9bae2bc1b05b8b4dd4ab5946c8b7

SHA1
93369919961d4f4cbaa65e7728ead8fd9d4dea93

SHA256
ae1b306c87730bbf7b1cd56f687903f396f8295d7d128c9897ebb5fb0ad14933

SHA512
73a9969b7dcda426b09a2a8566ed8c466e30752a161eade7e331743946d4cbcff589e3ec79d72f4b3ebb3e0e4a6665de29b87b409e7b4944d170518c0186a85e

Download Submit
memory/4732-9-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/4732-10-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/4732-11-0x000000001C530000-0x000000001C580000-memory.dmp

Filesize
320KB

Download
memory/4732-12-0x000000001C640000-0x000000001C6F2000-memory.dmp

Filesize
712KB

Download
memory/4732-13-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/4732-16-0x000000001C5C0000-0x000000001C5D2000-memory.dmp

Filesize
72KB

Download
memory/4732-17-0x000000001CD40000-0x000000001CD7C000-memory.dmp

Filesize
240KB

Download
memory/5072-0-0x00007FFEAEFA3000-0x00007FFEAEFA5000-memory.dmp

Filesize
8KB

Download
memory/5072-1-0x0000000000D70000-0x0000000001094000-memory.dmp

Filesize
3.1MB

Download
memory/5072-2-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/5072-8-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads