quasar | c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-11-2024 12:31

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General

Target

c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe
Size

3.1MB
MD5

dbe6648163a38bf88d16cd46cba60725
SHA1

8e6456d6eb5a41be657e00e652685c6441e2ab9c
SHA256

c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09
SHA512

81629676796e90b62ef26013318e1969148b7cf5e1e4cfe5456a84fa775f40b55fe7bb8ce47157beb91ecc6595f9128296c94cc05c4f2f77e508b6b0f014829f
SSDEEP

49152:GvyI22SsaNYfdPBldt698dBcjHTUaEEak2k/mF6oGdwGTHHB72eh2NT:Gvf22SsaNYfdPBldt6+dBcjHTUamEg

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.29.147:4782

Mutex

7b6a0219-487d-4153-aef3-d8965465527b

Attributes

encryption_key
C56BB8ACD2D4627CA39E0620C2CCEBAD8A4F4FF8
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

Processes:

resource	yara_rule
behavioral2/memory/2664-1-0x0000000000540000-0x0000000000864000-memory.dmp	family_quasar
behavioral2/files/0x000c000000023b42-7.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
2532	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

Processes:

schtasks.exeschtasks.exe

pid	Process
4976	schtasks.exe
1928	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	2664	c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe
Token: SeDebugPrivilege	2532	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2532	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exeClient.exe

description	pid	Process	procid_target
PID 2664 wrote to memory of 4976	2664	c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe	86
PID 2664 wrote to memory of 4976	2664	c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe	86
PID 2664 wrote to memory of 2532	2664	c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe	88
PID 2664 wrote to memory of 2532	2664	c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe	88
PID 2532 wrote to memory of 1928	2532	Client.exe	89
PID 2532 wrote to memory of 1928	2532	Client.exe	89

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\c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe
"C:\Users\Admin\AppData\Local\Temp\c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2664
- 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:4976
- 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:2532
- - 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:1928

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
dbe6648163a38bf88d16cd46cba60725

SHA1
8e6456d6eb5a41be657e00e652685c6441e2ab9c

SHA256
c8336d18c3361816fc9d6470ca313a41ca92878e8e465ccc2350d79d0e38ea09

SHA512
81629676796e90b62ef26013318e1969148b7cf5e1e4cfe5456a84fa775f40b55fe7bb8ce47157beb91ecc6595f9128296c94cc05c4f2f77e508b6b0f014829f

Download Submit
memory/2532-9-0x00007FFAEEA30000-0x00007FFAEF4F1000-memory.dmp

Filesize
10.8MB

Download
memory/2532-11-0x00007FFAEEA30000-0x00007FFAEF4F1000-memory.dmp

Filesize
10.8MB

Download
memory/2532-13-0x000000001B850000-0x000000001B902000-memory.dmp

Filesize
712KB

Download
memory/2532-12-0x000000001B740000-0x000000001B790000-memory.dmp

Filesize
320KB

Download
memory/2532-14-0x00007FFAEEA30000-0x00007FFAEF4F1000-memory.dmp

Filesize
10.8MB

Download
memory/2664-0-0x00007FFAEEA33000-0x00007FFAEEA35000-memory.dmp

Filesize
8KB

Download
memory/2664-1-0x0000000000540000-0x0000000000864000-memory.dmp

Filesize
3.1MB

Download
memory/2664-2-0x00007FFAEEA30000-0x00007FFAEF4F1000-memory.dmp

Filesize
10.8MB

Download
memory/2664-10-0x00007FFAEEA30000-0x00007FFAEF4F1000-memory.dmp

Filesize
10.8MB

Download