quasar | ad5cb8a93739cfa25593297273376d7184e735ce1d373988cb179084b8bb6059

General

Target

SeronTest.exe
Size

3.1MB
MD5

c18003ca99f5096b2fe9447a5287b5ed
SHA1

10ebcb15ed1eb9def39fd6a9dfa4db8ef83e61ca
SHA256

ad5cb8a93739cfa25593297273376d7184e735ce1d373988cb179084b8bb6059
SHA512

6ebb5def09d76801243c45fbf83844b8d9ad7c27154cc289c88fed630f3b1952af4dea4febdde021cf0c3a9b3fbddaefe89f1fc5903b03e52768f570376f2aac
SSDEEP

49152:TvelL26AaNeWgPhlmVqvMQ7XSK3PxNESE+k/iuLoGdUTHHB72eh2NT:TvOL26AaNeWgPhlmVqkQ7XSKfxNQ

Score

10^/10

quasar seron discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Seron

C2

nigeboc465-58875.portmap.host:58875

Mutex

eb8602ec-8a0d-4322-b9a0-544571be5a2d

Attributes

encryption_key
8BD9150EEC3DA71ED82080D7AEB7C165A58C889F
install_name
f8mk7ZGwVUpulm.exe
log_directory
Logs
reconnect_delay
3000
startup_key
f8mk7ZGwVUpulm
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/4152-1-0x0000000000BF0000-0x0000000000F14000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b71-5.dat	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	f8mk7ZGwVUpulm.exe

Executes dropped EXE 1 IoCs

pid	Process
3576	f8mk7ZGwVUpulm.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4656	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4656	PING.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
5044	schtasks.exe
4568	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4152	SeronTest.exe
Token: SeDebugPrivilege	3576	f8mk7ZGwVUpulm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3576	f8mk7ZGwVUpulm.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4152 wrote to memory of 5044	4152	SeronTest.exe	83
PID 4152 wrote to memory of 5044	4152	SeronTest.exe	83
PID 4152 wrote to memory of 3576	4152	SeronTest.exe	85
PID 4152 wrote to memory of 3576	4152	SeronTest.exe	85
PID 3576 wrote to memory of 4568	3576	f8mk7ZGwVUpulm.exe	86
PID 3576 wrote to memory of 4568	3576	f8mk7ZGwVUpulm.exe	86
PID 3576 wrote to memory of 2728	3576	f8mk7ZGwVUpulm.exe	94
PID 3576 wrote to memory of 2728	3576	f8mk7ZGwVUpulm.exe	94
PID 3576 wrote to memory of 112	3576	f8mk7ZGwVUpulm.exe	96
PID 3576 wrote to memory of 112	3576	f8mk7ZGwVUpulm.exe	96
PID 112 wrote to memory of 1012	112	cmd.exe	98
PID 112 wrote to memory of 1012	112	cmd.exe	98
PID 112 wrote to memory of 4656	112	cmd.exe	99
PID 112 wrote to memory of 4656	112	cmd.exe	99

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\SeronTest.exe
"C:\Users\Admin\AppData\Local\Temp\SeronTest.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4152
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "f8mk7ZGwVUpulm" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5044
- C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3576
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "f8mk7ZGwVUpulm" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4568
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /delete /tn "f8mk7ZGwVUpulm" /f
    3⤵
    PID:2728
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\LSIE3gWisC7N.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:112
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:1012
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\LSIE3gWisC7N.bat

Filesize
219B

MD5
59e7399b34605e7123ca7ba3739bab56

SHA1
b31b22e9bc589b9f5d4b3c6074e43492f3480f94

SHA256
6c541cd5a43d39bb75f8ddae6d3b85477394bdc2bef79831aa6771f88d8c7a3b

SHA512
34f8fc7c2828b110c63d32af91d55f7c66a4163f78f619b431ebca1b42f6c43b28cf0c173c8c5baf3ea8f86cb33370b68853130f32abcd625cf9872e7ea7250c

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe

Filesize
3.1MB

MD5
c18003ca99f5096b2fe9447a5287b5ed

SHA1
10ebcb15ed1eb9def39fd6a9dfa4db8ef83e61ca

SHA256
ad5cb8a93739cfa25593297273376d7184e735ce1d373988cb179084b8bb6059

SHA512
6ebb5def09d76801243c45fbf83844b8d9ad7c27154cc289c88fed630f3b1952af4dea4febdde021cf0c3a9b3fbddaefe89f1fc5903b03e52768f570376f2aac

Download Submit
memory/3576-11-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/3576-10-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/3576-12-0x000000001C060000-0x000000001C0B0000-memory.dmp

Filesize
320KB

Download
memory/3576-13-0x000000001C170000-0x000000001C222000-memory.dmp

Filesize
712KB

Download
memory/3576-16-0x000000001C120000-0x000000001C132000-memory.dmp

Filesize
72KB

Download
memory/3576-17-0x000000001C8B0000-0x000000001C8EC000-memory.dmp

Filesize
240KB

Download
memory/3576-18-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/3576-23-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4152-2-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4152-9-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4152-0-0x00007FFF59F73000-0x00007FFF59F75000-memory.dmp

Filesize
8KB

Download
memory/4152-1-0x0000000000BF0000-0x0000000000F14000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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