quasar | 64207a7e81e788dd1044a8fa6d6a4f87757cdd870af520a2e44576ac21a6e746

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03/11/2024, 19:27

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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

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 2 IoCs

resource	yara_rule
behavioral2/memory/1128-1-0x00000000009F0000-0x0000000000D14000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb6-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4592	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

pid	Process
4948	schtasks.exe
4104	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1128	SynapseX.exe
Token: SeDebugPrivilege	4592	Client.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
4592	Client.exe
4592	Client.exe
4592	Client.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4592	Client.exe
4592	Client.exe
4592	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 4948	1128	SynapseX.exe	86
PID 1128 wrote to memory of 4948	1128	SynapseX.exe	86
PID 1128 wrote to memory of 4592	1128	SynapseX.exe	89
PID 1128 wrote to memory of 4592	1128	SynapseX.exe	89
PID 4592 wrote to memory of 4104	4592	Client.exe	90
PID 4592 wrote to memory of 4104	4592	Client.exe	90

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:1128
- 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:4948
- 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:4592
- - 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:4104

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
e78c57ec9112a2860d4c07e1535452c6

SHA1
cfb8f58daaa9ae932b2e55c04eb887210cbf0a41

SHA256
64207a7e81e788dd1044a8fa6d6a4f87757cdd870af520a2e44576ac21a6e746

SHA512
50597692c65f476d3f96d43fc97813c2747cacccd542eaf82cb736827ba02fb291e905b9a7410f891eee394f2252f37aceaf26fbc8dcef0ebdd21fbe37fcaf93

Download Submit
memory/1128-9-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/1128-1-0x00000000009F0000-0x0000000000D14000-memory.dmp

Filesize
3.1MB

Download
memory/1128-2-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/1128-0-0x00007FFB253C3000-0x00007FFB253C5000-memory.dmp

Filesize
8KB

Download
memory/4592-10-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/4592-8-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/4592-11-0x000000001C1C0000-0x000000001C210000-memory.dmp

Filesize
320KB

Download
memory/4592-12-0x000000001C2D0000-0x000000001C382000-memory.dmp

Filesize
712KB

Download
memory/4592-15-0x000000001C1A0000-0x000000001C1B2000-memory.dmp

Filesize
72KB

Download
memory/4592-16-0x000000001C250000-0x000000001C28C000-memory.dmp

Filesize
240KB

Download
memory/4592-17-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/4592-18-0x00007FFB253C0000-0x00007FFB25E81000-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