quasar | 64207a7e81e788dd1044a8fa6d6a4f87757cdd870af520a2e44576ac21a6e746

General

Target

SynapseX.exe
Size

3.1MB
MD5

e78c57ec9112a2860d4c07e1535452c6
SHA1

cfb8f58daaa9ae932b2e55c04eb887210cbf0a41
SHA256

64207a7e81e788dd1044a8fa6d6a4f87757cdd870af520a2e44576ac21a6e746
SHA512

50597692c65f476d3f96d43fc97813c2747cacccd542eaf82cb736827ba02fb291e905b9a7410f891eee394f2252f37aceaf26fbc8dcef0ebdd21fbe37fcaf93
SSDEEP

49152:bv2I22SsaNYfdPBldt698dBcjH4CD1JoLoGdESTHHB72eh2NT:bvb22SsaNYfdPBldt6+dBcjH4CK

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

Inversin-43597.portmap.host:43597

Mutex

80329fd2-f063-4b06-9c7e-8dbc6278c2a3

Attributes

encryption_key
744EA1A385FEBC6DA96387411B7000D77E66B075
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
java updater
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2384-1-0x00000000012C0000-0x00000000015E4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000017079-5.dat	family_quasar
behavioral1/memory/2496-8-0x0000000000360000-0x0000000000684000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
2496	Client.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

Processes:

schtasks.exeschtasks.exe

pid	Process
2940	schtasks.exe
2712	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SynapseX.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	2384	SynapseX.exe
Token: SeDebugPrivilege	2496	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid	Process
2496	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid	Process
2496	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

SynapseX.exeClient.exe

description	pid	Process	procid_target
PID 2384 wrote to memory of 2940	2384	SynapseX.exe	30
PID 2384 wrote to memory of 2940	2384	SynapseX.exe	30
PID 2384 wrote to memory of 2940	2384	SynapseX.exe	30
PID 2384 wrote to memory of 2496	2384	SynapseX.exe	32
PID 2384 wrote to memory of 2496	2384	SynapseX.exe	32
PID 2384 wrote to memory of 2496	2384	SynapseX.exe	32
PID 2496 wrote to memory of 2712	2496	Client.exe	33
PID 2496 wrote to memory of 2712	2496	Client.exe	33
PID 2496 wrote to memory of 2712	2496	Client.exe	33

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\SynapseX.exe
"C:\Users\Admin\AppData\Local\Temp\SynapseX.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2940
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2496
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2712

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
e78c57ec9112a2860d4c07e1535452c6

SHA1
cfb8f58daaa9ae932b2e55c04eb887210cbf0a41

SHA256
64207a7e81e788dd1044a8fa6d6a4f87757cdd870af520a2e44576ac21a6e746

SHA512
50597692c65f476d3f96d43fc97813c2747cacccd542eaf82cb736827ba02fb291e905b9a7410f891eee394f2252f37aceaf26fbc8dcef0ebdd21fbe37fcaf93

Download Submit
memory/2384-0-0x000007FEF5923000-0x000007FEF5924000-memory.dmp

Filesize
4KB

Download
memory/2384-1-0x00000000012C0000-0x00000000015E4000-memory.dmp

Filesize
3.1MB

Download
memory/2384-2-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2384-7-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-9-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-10-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-8-0x0000000000360000-0x0000000000684000-memory.dmp

Filesize
3.1MB

Download
memory/2496-11-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads