quasar | 6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c

Analysis

max time kernel
94s
max time network
109s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-12-2024 21:05

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General

Target

6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe
Size

3.1MB
MD5

dc8e312af83c70840406faa6fc7a62c2
SHA1

ddf2abafadeef2ecdbca716ad491b3a2023c49fc
SHA256

6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c
SHA512

d5dde6eb392ddc8838f9aa6d583526548d9580de5e175ea1e40986de7fa213dfb0c5becbda87c38008706c954410704021d22149e614131c427c94b8daf4ce78
SSDEEP

49152:rvyI22SsaNYfdPBldt698dBcjH2QRJ6WbR3LoGdgcTHHB72eh2NT8:rvf22SsaNYfdPBldt6+dBcjH2QRJ6QQO

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

50.114.115.135:4782

Mutex

1e0c60c5-a4af-4c26-a7f1-5ee890a8321a

Attributes

encryption_key
26CBB40F2457EA2E776A5BB10B783B74E5FD47D3
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/2000-1-0x0000000000C60000-0x0000000000F84000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b88-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3464	Client.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
4904	schtasks.exe
1260	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2000	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe
Token: SeDebugPrivilege	3464	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3464	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 4904	2000	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	84
PID 2000 wrote to memory of 4904	2000	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	84
PID 2000 wrote to memory of 3464	2000	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	86
PID 2000 wrote to memory of 3464	2000	6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe	86
PID 3464 wrote to memory of 1260	3464	Client.exe	87
PID 3464 wrote to memory of 1260	3464	Client.exe	87

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\6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe
"C:\Users\Admin\AppData\Local\Temp\6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4904
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3464
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1260

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\SubDir\Client.exe

Filesize
3.1MB

MD5
dc8e312af83c70840406faa6fc7a62c2

SHA1
ddf2abafadeef2ecdbca716ad491b3a2023c49fc

SHA256
6c1025919511a0974d4e7212b1007d499836c424ec536e5625637ca0c091a33c

SHA512
d5dde6eb392ddc8838f9aa6d583526548d9580de5e175ea1e40986de7fa213dfb0c5becbda87c38008706c954410704021d22149e614131c427c94b8daf4ce78

Download Submit
memory/2000-0-0x00007FFCFBDB3000-0x00007FFCFBDB5000-memory.dmp

Filesize
8KB

Download
memory/2000-1-0x0000000000C60000-0x0000000000F84000-memory.dmp

Filesize
3.1MB

Download
memory/2000-2-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

Filesize
10.8MB

Download
memory/2000-9-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

Filesize
10.8MB

Download
memory/3464-10-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

Filesize
10.8MB

Download
memory/3464-11-0x00007FFCFBDB0000-0x00007FFCFC871000-memory.dmp

Filesize
10.8MB

Download
memory/3464-12-0x000000001BD80000-0x000000001BDD0000-memory.dmp

Filesize
320KB

Download
memory/3464-13-0x000000001BE90000-0x000000001BF42000-memory.dmp

Filesize
712KB

Download
memory/3464-16-0x000000001BE30000-0x000000001BE42000-memory.dmp

Filesize
72KB

Download
memory/3464-17-0x000000001C590000-0x000000001C5CC000-memory.dmp

Filesize
240KB

Download
memory/3464-18-0x00007FFCFBDB0000-0x00007FFCFC871000-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