quasar | a1ba76a8c187d43080d95acfb939a54d1b1c83546bbb4547990bbfcafd88c307

Analysis

max time kernel
150s
max time network
149s
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, 06:26

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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

resource	yara_rule
behavioral2/memory/4208-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
1736	outlooks.exe
3160	outlooks.exe
1104	outlooks.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2024 set thread context of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 1736 set thread context of 1104	1736	outlooks.exe	109

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

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

pid	Process
3624	schtasks.exe
2900	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2024	2e72d847aa6ea6680c769628c4ea4938.exe
2024	2e72d847aa6ea6680c769628c4ea4938.exe
1736	outlooks.exe
1736	outlooks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2024	2e72d847aa6ea6680c769628c4ea4938.exe
Token: SeDebugPrivilege	4208	2e72d847aa6ea6680c769628c4ea4938.exe
Token: SeDebugPrivilege	1736	outlooks.exe
Token: SeDebugPrivilege	1104	outlooks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1104	outlooks.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 2024 wrote to memory of 2360	2024	2e72d847aa6ea6680c769628c4ea4938.exe	100
PID 2024 wrote to memory of 2360	2024	2e72d847aa6ea6680c769628c4ea4938.exe	100
PID 2024 wrote to memory of 2360	2024	2e72d847aa6ea6680c769628c4ea4938.exe	100
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 2024 wrote to memory of 4208	2024	2e72d847aa6ea6680c769628c4ea4938.exe	101
PID 4208 wrote to memory of 3624	4208	2e72d847aa6ea6680c769628c4ea4938.exe	102
PID 4208 wrote to memory of 3624	4208	2e72d847aa6ea6680c769628c4ea4938.exe	102
PID 4208 wrote to memory of 3624	4208	2e72d847aa6ea6680c769628c4ea4938.exe	102
PID 4208 wrote to memory of 1736	4208	2e72d847aa6ea6680c769628c4ea4938.exe	104
PID 4208 wrote to memory of 1736	4208	2e72d847aa6ea6680c769628c4ea4938.exe	104
PID 4208 wrote to memory of 1736	4208	2e72d847aa6ea6680c769628c4ea4938.exe	104
PID 1736 wrote to memory of 3160	1736	outlooks.exe	108
PID 1736 wrote to memory of 3160	1736	outlooks.exe	108
PID 1736 wrote to memory of 3160	1736	outlooks.exe	108
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1736 wrote to memory of 1104	1736	outlooks.exe	109
PID 1104 wrote to memory of 2900	1104	outlooks.exe	110
PID 1104 wrote to memory of 2900	1104	outlooks.exe	110
PID 1104 wrote to memory of 2900	1104	outlooks.exe	110

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:2024
- C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe
  "C:\Users\Admin\AppData\Local\Temp\2e72d847aa6ea6680c769628c4ea4938.exe"
  2⤵
  PID:2360
- 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:4208
- - 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:3624
- - 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 behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1736
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:3160
  - - 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:1104
    - - 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:2900

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/1104-36-0x00000000080B0000-0x0000000008116000-memory.dmp

Filesize
408KB

Download
memory/1104-35-0x0000000008000000-0x000000000803C000-memory.dmp

Filesize
240KB

Download
memory/1104-34-0x0000000007FA0000-0x0000000007FB2000-memory.dmp

Filesize
72KB

Download
memory/1104-33-0x0000000006C50000-0x0000000006D02000-memory.dmp

Filesize
712KB

Download
memory/1104-32-0x00000000069E0000-0x0000000006A30000-memory.dmp

Filesize
320KB

Download
memory/1104-31-0x0000000006E40000-0x0000000007458000-memory.dmp

Filesize
6.1MB

Download
memory/1736-30-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/1736-25-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/1736-24-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/1736-23-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/2024-7-0x0000000005380000-0x000000000539C000-memory.dmp

Filesize
112KB

Download
memory/2024-6-0x0000000005650000-0x00000000056EC000-memory.dmp

Filesize
624KB

Download
memory/2024-15-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/2024-1-0x00000000005A0000-0x000000000093A000-memory.dmp

Filesize
3.6MB

Download
memory/2024-2-0x0000000005960000-0x0000000005F04000-memory.dmp

Filesize
5.6MB

Download
memory/2024-10-0x00000000091B0000-0x0000000009516000-memory.dmp

Filesize
3.4MB

Download
memory/2024-3-0x00000000053B0000-0x0000000005442000-memory.dmp

Filesize
584KB

Download
memory/2024-9-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/2024-8-0x0000000074DAE000-0x0000000074DAF000-memory.dmp

Filesize
4KB

Download
memory/2024-0-0x0000000074DAE000-0x0000000074DAF000-memory.dmp

Filesize
4KB

Download
memory/2024-4-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/2024-5-0x0000000005330000-0x000000000533A000-memory.dmp

Filesize
40KB

Download
memory/4208-14-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/4208-22-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/4208-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/4208-16-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download