quasar | a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
20-11-2024 13:42

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General

Target

Cotizacin99026475526_pdf.com.exe
Size

3.5MB
MD5

4a82d22fa6354daece680e49deb2ca2b
SHA1

370b26a5e33c3ae9fc567a22b57eedeb31b285c8
SHA256

a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b
SHA512

1e5870c81ff59dab2afb07ab29d6ac1a5effdc6a869f9e0b23afeee0418d690cf46c05edd8825ba8b4a7b6e9fef3cf002115f41ec6a727a1c866ba94d739ff78
SSDEEP

98304:AKUGRNTsLRvcuO0EcF40Qyiptb28Guy2NprIgq:AjAov9Ou6cipx072Nprb

Score

10^/10

quasar jekwu discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

JEKWU

Zyg.ydns.eu:5829

Opy.ydns.eu:5829

Mutex

9c58b2ba-07eb-415a-b48b-21bbb68d32285e

Attributes

encryption_key
C5B555A83D127A9553D4FB1FCECB35CE8E91A447
install_name
outlooks.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Outlooks
subdirectory
WindowsUpdates

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/2700-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2700-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2700-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2700-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2700-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 6 IoCs

pid	Process
904	outlooks.exe
2540	outlooks.exe
3020	outlooks.exe
2776	outlooks.exe
2968	outlooks.exe
2108	outlooks.exe

Loads dropped DLL 1 IoCs

pid	Process
2700	Cotizacin99026475526_pdf.com.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2868 set thread context of 2700	2868	Cotizacin99026475526_pdf.com.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	Cotizacin99026475526_pdf.com.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Cotizacin99026475526_pdf.com.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.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
536	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe
904	outlooks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	Cotizacin99026475526_pdf.com.exe
Token: SeDebugPrivilege	904	outlooks.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2868 wrote to memory of 2700	2868	Cotizacin99026475526_pdf.com.exe	30
PID 2700 wrote to memory of 536	2700	Cotizacin99026475526_pdf.com.exe	32
PID 2700 wrote to memory of 536	2700	Cotizacin99026475526_pdf.com.exe	32
PID 2700 wrote to memory of 536	2700	Cotizacin99026475526_pdf.com.exe	32
PID 2700 wrote to memory of 536	2700	Cotizacin99026475526_pdf.com.exe	32
PID 2700 wrote to memory of 904	2700	Cotizacin99026475526_pdf.com.exe	34
PID 2700 wrote to memory of 904	2700	Cotizacin99026475526_pdf.com.exe	34
PID 2700 wrote to memory of 904	2700	Cotizacin99026475526_pdf.com.exe	34
PID 2700 wrote to memory of 904	2700	Cotizacin99026475526_pdf.com.exe	34
PID 904 wrote to memory of 2540	904	outlooks.exe	35
PID 904 wrote to memory of 2540	904	outlooks.exe	35
PID 904 wrote to memory of 2540	904	outlooks.exe	35
PID 904 wrote to memory of 2540	904	outlooks.exe	35
PID 904 wrote to memory of 3020	904	outlooks.exe	36
PID 904 wrote to memory of 3020	904	outlooks.exe	36
PID 904 wrote to memory of 3020	904	outlooks.exe	36
PID 904 wrote to memory of 3020	904	outlooks.exe	36
PID 904 wrote to memory of 2776	904	outlooks.exe	37
PID 904 wrote to memory of 2776	904	outlooks.exe	37
PID 904 wrote to memory of 2776	904	outlooks.exe	37
PID 904 wrote to memory of 2776	904	outlooks.exe	37
PID 904 wrote to memory of 2968	904	outlooks.exe	38
PID 904 wrote to memory of 2968	904	outlooks.exe	38
PID 904 wrote to memory of 2968	904	outlooks.exe	38
PID 904 wrote to memory of 2968	904	outlooks.exe	38
PID 904 wrote to memory of 2108	904	outlooks.exe	39
PID 904 wrote to memory of 2108	904	outlooks.exe	39
PID 904 wrote to memory of 2108	904	outlooks.exe	39
PID 904 wrote to memory of 2108	904	outlooks.exe	39

C:\Users\Admin\AppData\Local\Temp\Cotizacin99026475526_pdf.com.exe
"C:\Users\Admin\AppData\Local\Temp\Cotizacin99026475526_pdf.com.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Local\Temp\Cotizacin99026475526_pdf.com.exe
  "C:\Users\Admin\AppData\Local\Temp\Cotizacin99026475526_pdf.com.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:536
- - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:904
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2540
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:3020
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2776
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2968
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2108

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\WindowsUpdates\outlooks.exe

Filesize
3.5MB

MD5
4a82d22fa6354daece680e49deb2ca2b

SHA1
370b26a5e33c3ae9fc567a22b57eedeb31b285c8

SHA256
a83b6e776af937398296eb1b06b65e9ea8226693b5a8337f35c8b8e42bebb23b

SHA512
1e5870c81ff59dab2afb07ab29d6ac1a5effdc6a869f9e0b23afeee0418d690cf46c05edd8825ba8b4a7b6e9fef3cf002115f41ec6a727a1c866ba94d739ff78

Download Submit
memory/904-33-0x0000000000760000-0x0000000000772000-memory.dmp

Filesize
72KB

Download
memory/904-32-0x00000000003B0000-0x0000000000740000-memory.dmp

Filesize
3.6MB

Download
memory/2700-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2700-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2700-31-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2700-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2700-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2700-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2700-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2700-22-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2700-21-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2700-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2700-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2868-4-0x0000000000520000-0x0000000000532000-memory.dmp

Filesize
72KB

Download
memory/2868-0-0x0000000074CCE000-0x0000000074CCF000-memory.dmp

Filesize
4KB

Download
memory/2868-6-0x0000000005AD0000-0x0000000005E38000-memory.dmp

Filesize
3.4MB

Download
memory/2868-23-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-3-0x0000000074CCE000-0x0000000074CCF000-memory.dmp

Filesize
4KB

Download
memory/2868-5-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-2-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2868-1-0x0000000001160000-0x00000000014F0000-memory.dmp

Filesize
3.6MB

Download