quasar | 2b85704b2d63fe95970f2a35e9f48d9e4a72cd4cdfb6c8127f618bf043332f88

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19-01-2025 08:31

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

436052B37A3752148C885667E34DD9C3.exe
Size

10.7MB
MD5

436052b37a3752148c885667e34dd9c3
SHA1

59dbc9e97fb1c74ae666bc87e9ab2f453f780006
SHA256

2b85704b2d63fe95970f2a35e9f48d9e4a72cd4cdfb6c8127f618bf043332f88
SHA512

c6ef01300bb1350d64e5a4d5f48a1c013f8638ac9240820d2d27e951b0ca4b105ff2ee66a07bb3954178c7df8435dbfb561b7a7112f8f3ec79e63cedb7f4d784
SSDEEP

196608:QPW6IG7f1KCArQWGRhoDyp7t1OCf80nXIQPfMEftec7HsrEha1:w37d6T+97t1OCf80XIxQec7O

Score

10^/10

quasar svchost 2 svchost 3 discovery pyinstaller spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost 2

41.216.183.179:3742

Mutex

d018acac-011d-4ca3-b0c3-4fdd7ec2d6d1

Attributes

encryption_key
0325CE0E85B5B8870BB69FE8C81088DBCBFAC6F7
install_name
Host Process for Windows Tasks.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Host Process for Windows Tasks
subdirectory
SubDir

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost 3

41.216.183.179:3742

Mutex

11b8b70b-ab15-4aab-8132-3e7b18b2b48b

Attributes

encryption_key
0325CE0E85B5B8870BB69FE8C81088DBCBFAC6F7
install_name
startui.exe
log_directory
Logs
reconnect_delay
3000
startup_key
startui
subdirectory
SubDir

Signatures

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

Quasar payload 6 IoCs

resource	yara_rule
behavioral1/files/0x0008000000016c58-8.dat	family_quasar
behavioral1/files/0x0008000000016ca2-16.dat	family_quasar
behavioral1/memory/2788-20-0x0000000000D00000-0x0000000001024000-memory.dmp	family_quasar
behavioral1/memory/1588-19-0x0000000000C90000-0x0000000000FB4000-memory.dmp	family_quasar
behavioral1/memory/1884-974-0x0000000000390000-0x00000000006B4000-memory.dmp	family_quasar
behavioral1/memory/1552-979-0x00000000001C0000-0x00000000004E4000-memory.dmp	family_quasar

Executes dropped EXE 6 IoCs

pid	Process
340	WormGPT.exe
1588	comsurrogate.exe
2788	svc.exe
1784	WormGPT.exe
1884	Host Process for Windows Tasks.exe
1552	startui.exe

Loads dropped DLL 6 IoCs

pid	Process
1740	436052B37A3752148C885667E34DD9C3.exe
1740	436052B37A3752148C885667E34DD9C3.exe
2524	Process not Found
1740	436052B37A3752148C885667E34DD9C3.exe
340	WormGPT.exe
1784	WormGPT.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	comsurrogate.exe
File opened for modification	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	comsurrogate.exe
File opened for modification	C:\Windows\system32\SubDir	comsurrogate.exe
File opened for modification	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	Host Process for Windows Tasks.exe
File opened for modification	C:\Windows\system32\SubDir	Host Process for Windows Tasks.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\SubDir\startui.exe	svc.exe
File opened for modification	C:\Program Files\SubDir\startui.exe	svc.exe
File opened for modification	C:\Program Files\SubDir	svc.exe
File opened for modification	C:\Program Files\SubDir\startui.exe	startui.exe
File opened for modification	C:\Program Files\SubDir	startui.exe

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
behavioral1/files/0x0008000000012117-4.dat	pyinstaller

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	436052B37A3752148C885667E34DD9C3.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2656	schtasks.exe
2604	schtasks.exe
1700	schtasks.exe
792	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2788	svc.exe
Token: SeDebugPrivilege	1588	comsurrogate.exe
Token: SeDebugPrivilege	1884	Host Process for Windows Tasks.exe
Token: SeDebugPrivilege	1552	startui.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1884	Host Process for Windows Tasks.exe
1552	startui.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 340	1740	436052B37A3752148C885667E34DD9C3.exe	30
PID 1740 wrote to memory of 340	1740	436052B37A3752148C885667E34DD9C3.exe	30
PID 1740 wrote to memory of 340	1740	436052B37A3752148C885667E34DD9C3.exe	30
PID 1740 wrote to memory of 340	1740	436052B37A3752148C885667E34DD9C3.exe	30
PID 1740 wrote to memory of 1588	1740	436052B37A3752148C885667E34DD9C3.exe	31
PID 1740 wrote to memory of 1588	1740	436052B37A3752148C885667E34DD9C3.exe	31
PID 1740 wrote to memory of 1588	1740	436052B37A3752148C885667E34DD9C3.exe	31
PID 1740 wrote to memory of 1588	1740	436052B37A3752148C885667E34DD9C3.exe	31
PID 1740 wrote to memory of 2788	1740	436052B37A3752148C885667E34DD9C3.exe	33
PID 1740 wrote to memory of 2788	1740	436052B37A3752148C885667E34DD9C3.exe	33
PID 1740 wrote to memory of 2788	1740	436052B37A3752148C885667E34DD9C3.exe	33
PID 1740 wrote to memory of 2788	1740	436052B37A3752148C885667E34DD9C3.exe	33
PID 1588 wrote to memory of 2656	1588	comsurrogate.exe	34
PID 1588 wrote to memory of 2656	1588	comsurrogate.exe	34
PID 1588 wrote to memory of 2656	1588	comsurrogate.exe	34
PID 2788 wrote to memory of 2604	2788	svc.exe	35
PID 2788 wrote to memory of 2604	2788	svc.exe	35
PID 2788 wrote to memory of 2604	2788	svc.exe	35
PID 340 wrote to memory of 1784	340	WormGPT.exe	38
PID 340 wrote to memory of 1784	340	WormGPT.exe	38
PID 340 wrote to memory of 1784	340	WormGPT.exe	38
PID 1588 wrote to memory of 1884	1588	comsurrogate.exe	39
PID 1588 wrote to memory of 1884	1588	comsurrogate.exe	39
PID 1588 wrote to memory of 1884	1588	comsurrogate.exe	39
PID 2788 wrote to memory of 1552	2788	svc.exe	40
PID 2788 wrote to memory of 1552	2788	svc.exe	40
PID 2788 wrote to memory of 1552	2788	svc.exe	40
PID 1552 wrote to memory of 1700	1552	startui.exe	41
PID 1552 wrote to memory of 1700	1552	startui.exe	41
PID 1552 wrote to memory of 1700	1552	startui.exe	41
PID 1884 wrote to memory of 792	1884	Host Process for Windows Tasks.exe	43
PID 1884 wrote to memory of 792	1884	Host Process for Windows Tasks.exe	43
PID 1884 wrote to memory of 792	1884	Host Process for Windows Tasks.exe	43

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\436052B37A3752148C885667E34DD9C3.exe
"C:\Users\Admin\AppData\Local\Temp\436052B37A3752148C885667E34DD9C3.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Users\Admin\AppData\Local\Temp\WormGPT.exe
  "C:\Users\Admin\AppData\Local\Temp\WormGPT.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:340
- - C:\Users\Admin\AppData\Local\Temp\WormGPT.exe
    "C:\Users\Admin\AppData\Local\Temp\WormGPT.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:1784
- C:\Users\Admin\AppData\Local\Temp\comsurrogate.exe
  "C:\Users\Admin\AppData\Local\Temp\comsurrogate.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1588
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Host Process for Windows Tasks" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2656
- - C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe
    "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe"
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1884
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Host Process for Windows Tasks" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:792
- C:\Users\Admin\AppData\Local\Temp\svc.exe
  "C:\Users\Admin\AppData\Local\Temp\svc.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "startui" /sc ONLOGON /tr "C:\Program Files\SubDir\startui.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2604
- - C:\Program Files\SubDir\startui.exe
    "C:\Program Files\SubDir\startui.exe"
    3⤵
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1552
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "startui" /sc ONLOGON /tr "C:\Program Files\SubDir\startui.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1700

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\_MEI3402\python310.dll

Filesize
4.3MB

MD5
deaf0c0cc3369363b800d2e8e756a402

SHA1
3085778735dd8badad4e39df688139f4eed5f954

SHA256
156cf2b64dd0f4d9bdb346b654a11300d6e9e15a65ef69089923dafc1c71e33d

SHA512
5cac1d92af7ee18425b5ee8e7cd4e941a9ddffb4bc1c12bb8aeabeed09acec1ff0309abc41a2e0c8db101fee40724f8bfb27a78898128f8746c8fe01c1631989

Download Submit
C:\Users\Admin\AppData\Local\Temp\svc.exe

Filesize
3.1MB

MD5
7776335b8b0d230370ca39602c484a69

SHA1
7705fb56ea438e609a6094bef10bdb2392f55719

SHA256
b6bb8a533c77034b0d4eab34ffa434b1a999cac5f59983680d222f04e437729d

SHA512
0e290749b442e317fe90591a43549a003d7f95c086d220b04eae018209a9785a1754b834d529a5839b15d2aa783edd17e52f4ab2b331e3a14c47d84ebf24899d

Download Submit
\Users\Admin\AppData\Local\Temp\WormGPT.exe

Filesize
8.6MB

MD5
1c2128b3ad0a5dc32f938362e16f6b07

SHA1
eecb906f664ff6a5fc4cded35c274cbcc342fec8

SHA256
2b093e0b16481ff4d090e4502c6ef4d547fb7003a6a07e43fc042a1550f9bb9c

SHA512
21758831af1d641c1f1aad7fb148b16c87ebf00ae5574a3f66542620931088c6ebedc61a92ccb2ffe2f1643792989541eae9180a0bdd672202df7ac455f4350e

Download Submit
\Users\Admin\AppData\Local\Temp\comsurrogate.exe

Filesize
3.1MB

MD5
026407873fa1c229033246e574724e02

SHA1
888c874808635b0b03456da413b1941c61c33686

SHA256
4531e23ad4f6443dd3e0807007afd811ea1fc6a2a35f423e9ac98bcfc21be996

SHA512
660db81f331c9ff47440d41d2e5062d92ad1fe2b7cc5559ba120c4908b5cd9a253c4fb1da323a1f0f1e7a5ce50d04e9020aec286e3eb399cb3ebdf1b765acc7f

Download Submit
memory/1552-979-0x00000000001C0000-0x00000000004E4000-memory.dmp

Filesize
3.1MB

Download
memory/1588-18-0x000007FEF5B43000-0x000007FEF5B44000-memory.dmp

Filesize
4KB

Download
memory/1588-19-0x0000000000C90000-0x0000000000FB4000-memory.dmp

Filesize
3.1MB

Download
memory/1884-974-0x0000000000390000-0x00000000006B4000-memory.dmp

Filesize
3.1MB

Download
memory/2788-20-0x0000000000D00000-0x0000000001024000-memory.dmp

Filesize
3.1MB

Download
memory/2788-95-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

Filesize
9.9MB

Download
memory/2788-978-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads