quasar | 92e22f42d2a793656eef26bdcc3804da16f0c9d75e32813200bda77b88327a1a

General

Target

2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe
Size

4.6MB
MD5

c7eb615f6cfae5aab2205d79754b008a
SHA1

9fbe9ec9b672c094fb6a92cbc2d1750c4a287a3f
SHA256

92e22f42d2a793656eef26bdcc3804da16f0c9d75e32813200bda77b88327a1a
SHA512

ba499a34afb860c1be0449c45ae2e9d37012c1ddd1fc64671c205be3d45680e67bd200816322c1987a0dd8949f43aaede20a274c45ef265f963b3cbd8efa3fbe
SSDEEP

98304:Si0IdaI3Wvr22SsaNYfdPBldt6+dBcjHtKRJ6BSIbzZyIbzZY:NaM7jGIZDK

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

mx5.deitie.asia:4495

Mutex

ebbf737a-dddd-43dd-9b0a-74831302455d

Attributes

encryption_key
F8516D89A1DFD78BD8FF575BBC3AE828B47FF0E1
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/files/0x000c000000023b72-2.dat	family_quasar
behavioral2/memory/1884-5-0x0000000000E30000-0x0000000001154000-memory.dmp	family_quasar

Drops startup file 1 IoCs

Processes:

2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe

Executes dropped EXE 2 IoCs

Processes:

sign.exeClient.exe

pid	Process
1884	sign.exe
4444	Client.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.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
3980	schtasks.exe
5104	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe

pid	Process
544	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe
544	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

sign.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	1884	sign.exe
Token: SeDebugPrivilege	4444	Client.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe

pid	Process
544	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe
544	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exesign.exeClient.exe

description	pid	Process	procid_target
PID 544 wrote to memory of 1884	544	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe	86
PID 544 wrote to memory of 1884	544	2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe	86
PID 1884 wrote to memory of 3980	1884	sign.exe	90
PID 1884 wrote to memory of 3980	1884	sign.exe	90
PID 1884 wrote to memory of 4444	1884	sign.exe	92
PID 1884 wrote to memory of 4444	1884	sign.exe	92
PID 4444 wrote to memory of 5104	4444	Client.exe	94
PID 4444 wrote to memory of 5104	4444	Client.exe	94

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\2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-01_c7eb615f6cfae5aab2205d79754b008a_icedid_poet-rat_quasar-rat_xrat.exe"
1⤵
- Drops startup file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:544
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\\sign.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1884
- - 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:3980
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4444
  - - 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
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:5104

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 Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe

Filesize
3.1MB

MD5
7498d554976744dfbd271ba755c6c192

SHA1
ec733d01e776518e387d2f51d1a6559b81f03b1e

SHA256
44089202623b9671051aa5bba5e72f81f68ce818c3054dde57726aaa6dcb9ff7

SHA512
d4e987d0e6235001fac4ae3a634e8fe98c6830e26a6a6876fbc36262842688d3ec301cff75003d2af695cdfd357ac50919946695b7d5d3293ebcba97153e1030

Download Submit
memory/544-10-0x0000000002740000-0x0000000002741000-memory.dmp

Filesize
4KB

Download
memory/544-9-0x0000000002750000-0x0000000002751000-memory.dmp

Filesize
4KB

Download
memory/1884-4-0x00007FFE3D2D3000-0x00007FFE3D2D5000-memory.dmp

Filesize
8KB

Download
memory/1884-5-0x0000000000E30000-0x0000000001154000-memory.dmp

Filesize
3.1MB

Download
memory/1884-6-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp

Filesize
10.8MB

Download
memory/1884-15-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp

Filesize
10.8MB

Download
memory/4444-16-0x0000000002DB0000-0x0000000002E00000-memory.dmp

Filesize
320KB

Download
memory/4444-17-0x000000001BEC0000-0x000000001BF72000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads