quasar | a1ba76a8c187d43080d95acfb939a54d1b1c83546bbb4547990bbfcafd88c307

Analysis

max time kernel
93s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-11-2024 06:30

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General

Target

2e72d847aa6ea6680c769628c4ea4938.exe
Size

3.6MB
MD5

2e72d847aa6ea6680c769628c4ea4938
SHA1

5f4a1cacb1c414787a51444a06c1081a2e6eb469
SHA256

a1ba76a8c187d43080d95acfb939a54d1b1c83546bbb4547990bbfcafd88c307
SHA512

6c9797f4c4fdf0e36cc4efbb564f46617b5e83fc0ea44c4e1932e870183a577fedfd07f0376531841084892e1499cc870524c3f0aa707a61f187a779330629c1
SSDEEP

98304:Kh6wZR7VXWhBwoGQ/9KHjlWsO9ndIdYYWGyF:26iOwfS9KpWNa4

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 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1636-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

outlooks.exeoutlooks.exe

pid	Process
2496	outlooks.exe
3996	outlooks.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

2e72d847aa6ea6680c769628c4ea4938.exeoutlooks.exe

description	pid	Process	procid_target
PID 4756 set thread context of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 2496 set thread context of 3996	2496	outlooks.exe	100

System Location Discovery: System Language Discovery 1 TTPs 6 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:

2e72d847aa6ea6680c769628c4ea4938.exe2e72d847aa6ea6680c769628c4ea4938.exeschtasks.exeoutlooks.exeoutlooks.exeschtasks.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e72d847aa6ea6680c769628c4ea4938.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e72d847aa6ea6680c769628c4ea4938.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
4564	schtasks.exe
5028	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

2e72d847aa6ea6680c769628c4ea4938.exe

pid	Process
4756	2e72d847aa6ea6680c769628c4ea4938.exe
4756	2e72d847aa6ea6680c769628c4ea4938.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

2e72d847aa6ea6680c769628c4ea4938.exe2e72d847aa6ea6680c769628c4ea4938.exeoutlooks.exe

description	pid	Process
Token: SeDebugPrivilege	4756	2e72d847aa6ea6680c769628c4ea4938.exe
Token: SeDebugPrivilege	1636	2e72d847aa6ea6680c769628c4ea4938.exe
Token: SeDebugPrivilege	3996	outlooks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

outlooks.exe

pid	Process
3996	outlooks.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

2e72d847aa6ea6680c769628c4ea4938.exe2e72d847aa6ea6680c769628c4ea4938.exeoutlooks.exeoutlooks.exe

description	pid	Process	procid_target
PID 4756 wrote to memory of 4244	4756	2e72d847aa6ea6680c769628c4ea4938.exe	93
PID 4756 wrote to memory of 4244	4756	2e72d847aa6ea6680c769628c4ea4938.exe	93
PID 4756 wrote to memory of 4244	4756	2e72d847aa6ea6680c769628c4ea4938.exe	93
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 4756 wrote to memory of 1636	4756	2e72d847aa6ea6680c769628c4ea4938.exe	94
PID 1636 wrote to memory of 4564	1636	2e72d847aa6ea6680c769628c4ea4938.exe	95
PID 1636 wrote to memory of 4564	1636	2e72d847aa6ea6680c769628c4ea4938.exe	95
PID 1636 wrote to memory of 4564	1636	2e72d847aa6ea6680c769628c4ea4938.exe	95
PID 1636 wrote to memory of 2496	1636	2e72d847aa6ea6680c769628c4ea4938.exe	97
PID 1636 wrote to memory of 2496	1636	2e72d847aa6ea6680c769628c4ea4938.exe	97
PID 1636 wrote to memory of 2496	1636	2e72d847aa6ea6680c769628c4ea4938.exe	97
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 2496 wrote to memory of 3996	2496	outlooks.exe	100
PID 3996 wrote to memory of 5028	3996	outlooks.exe	101
PID 3996 wrote to memory of 5028	3996	outlooks.exe	101
PID 3996 wrote to memory of 5028	3996	outlooks.exe	101

C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe
"C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4756
- C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe
  "C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe"
  2⤵
  PID:4244
- C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe
  "C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1636
- - 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:4564
- - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2496
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3996
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:5028

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\2e72d847aa6ea6680c769628c4ea4938.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

Filesize
3.6MB

MD5
2e72d847aa6ea6680c769628c4ea4938

SHA1
5f4a1cacb1c414787a51444a06c1081a2e6eb469

SHA256
a1ba76a8c187d43080d95acfb939a54d1b1c83546bbb4547990bbfcafd88c307

SHA512
6c9797f4c4fdf0e36cc4efbb564f46617b5e83fc0ea44c4e1932e870183a577fedfd07f0376531841084892e1499cc870524c3f0aa707a61f187a779330629c1

Download Submit
memory/1636-16-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/1636-22-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/1636-14-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/1636-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2496-25-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/2496-29-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/2496-24-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/2496-23-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/3996-30-0x0000000006E90000-0x00000000074A8000-memory.dmp

Filesize
6.1MB

Download
memory/3996-31-0x0000000006A00000-0x0000000006A50000-memory.dmp

Filesize
320KB

Download
memory/3996-32-0x0000000006C70000-0x0000000006D22000-memory.dmp

Filesize
712KB

Download
memory/3996-33-0x0000000006E70000-0x0000000006E82000-memory.dmp

Filesize
72KB

Download
memory/3996-34-0x0000000008030000-0x000000000806C000-memory.dmp

Filesize
240KB

Download
memory/3996-35-0x00000000080E0000-0x0000000008146000-memory.dmp

Filesize
408KB

Download
memory/4756-7-0x0000000005200000-0x000000000521C000-memory.dmp

Filesize
112KB

Download
memory/4756-15-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/4756-10-0x0000000008DF0000-0x0000000009156000-memory.dmp

Filesize
3.4MB

Download
memory/4756-9-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/4756-8-0x000000007535E000-0x000000007535F000-memory.dmp

Filesize
4KB

Download
memory/4756-0-0x000000007535E000-0x000000007535F000-memory.dmp

Filesize
4KB

Download
memory/4756-6-0x00000000052A0000-0x000000000533C000-memory.dmp

Filesize
624KB

Download
memory/4756-5-0x0000000004FA0000-0x0000000004FAA000-memory.dmp

Filesize
40KB

Download
memory/4756-4-0x0000000075350000-0x0000000075B00000-memory.dmp

Filesize
7.7MB

Download
memory/4756-3-0x0000000004FC0000-0x0000000005052000-memory.dmp

Filesize
584KB

Download
memory/4756-2-0x0000000005570000-0x0000000005B14000-memory.dmp

Filesize
5.6MB

Download
memory/4756-1-0x0000000000210000-0x00000000005AA000-memory.dmp

Filesize
3.6MB

Download