quasar | 6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-02-2025 13:59

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General

Target

FAKTURA DHL.exe
Size

3.7MB
MD5

7c5ba84841c124268a70f0a668d851cb
SHA1

b427e9c43f0a1a361f7bf38d5ea829e09a986f54
SHA256

6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe
SHA512

523a026f20a80a120e107fbe32bcf8f8434910f9d20ae12c0cf4469b5a61fe120553f952c1724451ec40d3d043a874b57612278d9ed5834f9e85b4aaf928e64a
SSDEEP

98304:2XxBLBJqj8ysrESFeA4xEa375aqJeZhd9ijkMCIhNVT+lLb:2X7LjgFs5FUEfX3gqANG

Score

10^/10

quasar sim discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SIM

yuba.ydns.eu:6921

Mutex

c1407Qq42e-4199-420b-b7e3-f2181EdZ44b38970

Attributes

encryption_key
9AE9A56EA56429B2803AB077CB5D2AE3FDEA1BD6
install_name
Edge.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft Edge
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/2636-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2636-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2636-9-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2636-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2636-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 6 IoCs

pid	Process
2520	Edge.exe
2752	Edge.exe
2832	Edge.exe
2844	Edge.exe
2856	Edge.exe
2864	Edge.exe

Loads dropped DLL 1 IoCs

pid	Process
2636	FAKTURA DHL.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3040 set thread context of 2636	3040	FAKTURA DHL.exe	30

System Location Discovery: System Language Discovery 1 TTPs 4 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	FAKTURA DHL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FAKTURA DHL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Edge.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2556	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe
2520	Edge.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	FAKTURA DHL.exe
Token: SeDebugPrivilege	2520	Edge.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 3040 wrote to memory of 2636	3040	FAKTURA DHL.exe	30
PID 2636 wrote to memory of 2556	2636	FAKTURA DHL.exe	31
PID 2636 wrote to memory of 2556	2636	FAKTURA DHL.exe	31
PID 2636 wrote to memory of 2556	2636	FAKTURA DHL.exe	31
PID 2636 wrote to memory of 2556	2636	FAKTURA DHL.exe	31
PID 2636 wrote to memory of 2520	2636	FAKTURA DHL.exe	33
PID 2636 wrote to memory of 2520	2636	FAKTURA DHL.exe	33
PID 2636 wrote to memory of 2520	2636	FAKTURA DHL.exe	33
PID 2636 wrote to memory of 2520	2636	FAKTURA DHL.exe	33
PID 2520 wrote to memory of 2752	2520	Edge.exe	34
PID 2520 wrote to memory of 2752	2520	Edge.exe	34
PID 2520 wrote to memory of 2752	2520	Edge.exe	34
PID 2520 wrote to memory of 2752	2520	Edge.exe	34
PID 2520 wrote to memory of 2832	2520	Edge.exe	35
PID 2520 wrote to memory of 2832	2520	Edge.exe	35
PID 2520 wrote to memory of 2832	2520	Edge.exe	35
PID 2520 wrote to memory of 2832	2520	Edge.exe	35
PID 2520 wrote to memory of 2844	2520	Edge.exe	36
PID 2520 wrote to memory of 2844	2520	Edge.exe	36
PID 2520 wrote to memory of 2844	2520	Edge.exe	36
PID 2520 wrote to memory of 2844	2520	Edge.exe	36
PID 2520 wrote to memory of 2856	2520	Edge.exe	37
PID 2520 wrote to memory of 2856	2520	Edge.exe	37
PID 2520 wrote to memory of 2856	2520	Edge.exe	37
PID 2520 wrote to memory of 2856	2520	Edge.exe	37
PID 2520 wrote to memory of 2864	2520	Edge.exe	38
PID 2520 wrote to memory of 2864	2520	Edge.exe	38
PID 2520 wrote to memory of 2864	2520	Edge.exe	38
PID 2520 wrote to memory of 2864	2520	Edge.exe	38

C:\Users\Admin\AppData\Local\Temp\FAKTURA DHL.exe
"C:\Users\Admin\AppData\Local\Temp\FAKTURA DHL.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\FAKTURA DHL.exe
  "C:\Users\Admin\AppData\Local\Temp\FAKTURA DHL.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2636
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Microsoft Edge" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2556
- - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2520
  - - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
      4⤵
      Executes dropped EXE
      PID:2752
  - - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
      4⤵
      Executes dropped EXE
      PID:2832
  - - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
      4⤵
      Executes dropped EXE
      PID:2844
  - - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
      4⤵
      Executes dropped EXE
      PID:2856
  - - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
      4⤵
      Executes dropped EXE
      PID:2864

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\SubDir\Edge.exe

Filesize
3.7MB

MD5
7c5ba84841c124268a70f0a668d851cb

SHA1
b427e9c43f0a1a361f7bf38d5ea829e09a986f54

SHA256
6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe

SHA512
523a026f20a80a120e107fbe32bcf8f8434910f9d20ae12c0cf4469b5a61fe120553f952c1724451ec40d3d043a874b57612278d9ed5834f9e85b4aaf928e64a

Download Submit
memory/2520-32-0x0000000000390000-0x0000000000750000-memory.dmp

Filesize
3.8MB

Download
memory/2636-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2636-31-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2636-23-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2636-21-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2636-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2636-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2636-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2636-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2636-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2636-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2636-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3040-5-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3040-6-0x000000000B160000-0x000000000B4C8000-memory.dmp

Filesize
3.4MB

Download
memory/3040-22-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3040-0-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/3040-4-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/3040-3-0x0000000000450000-0x000000000046E000-memory.dmp

Filesize
120KB

Download
memory/3040-2-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/3040-1-0x00000000010E0000-0x00000000014A0000-memory.dmp

Filesize
3.8MB

Download