quasar | 693e126484497a348bdedf9eda9263a68fb19b92c7449ccec419274d7ee61394

Analysis

max time kernel
145s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/04/2024, 23:07

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General

Target
klarcrack.exe
Size 3.1MB
Sample240403-233k3sff4x
SHA256 693e126484497a348bdedf9eda9263a68fb19b92c7449ccec419274d7ee61394
MD5 137131a8d5de17ad363c8a16317caafc
SHA1 9067bcca3e183b3d5bec4da114eff1de764843d6
SHA512 8ccf84deb0372f5a834d988887dcd9acbefa8fefa4ffdb225eafb50827ff1db8bb5c98074b2d4c2d188761303634c22064a87cb8ebf781ed535ad39c14767285
SSDEEP 49152:Pvkt62XlaSFNWPjljiFa2RoUYISdQebRRaLoGduTHHB72eh2NT:Pv462XlaSFNWPjljiFXRoUYISdQwE
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.214.1:4782

Mutex

d611c55c-eed6-46f5-b41f-31ded400b5b1

Attributes

encryption_key
80385BA8C17CE50152104E573DF78F0BE61B58AA
install_name
Klar.exe
log_directory
Logs
reconnect_delay
3000
startup_key
34534683576
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2232-0-0x00000000010C0000-0x00000000013E4000-memory.dmp	family_quasar
behavioral1/files/0x000800000001227e-6.dat	family_quasar
behavioral1/memory/2952-9-0x0000000000390000-0x00000000006B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2952	Klar.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2516	schtasks.exe
2716	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	klarcrack.exe
Token: SeDebugPrivilege	2952	Klar.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2952	Klar.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2716	2232	klarcrack.exe	28
PID 2232 wrote to memory of 2716	2232	klarcrack.exe	28
PID 2232 wrote to memory of 2716	2232	klarcrack.exe	28
PID 2232 wrote to memory of 2952	2232	klarcrack.exe	30
PID 2232 wrote to memory of 2952	2232	klarcrack.exe	30
PID 2232 wrote to memory of 2952	2232	klarcrack.exe	30
PID 2952 wrote to memory of 2516	2952	Klar.exe	31
PID 2952 wrote to memory of 2516	2952	Klar.exe	31
PID 2952 wrote to memory of 2516	2952	Klar.exe	31

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\klarcrack.exe
"C:\Users\Admin\AppData\Local\Temp\klarcrack.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "34534683576" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Klar.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2716
- C:\Users\Admin\AppData\Roaming\SubDir\Klar.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Klar.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2952
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "34534683576" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Klar.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Klar.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\Klar.exe
Size 3.1MB
SHA256 693e126484497a348bdedf9eda9263a68fb19b92c7449ccec419274d7ee61394
MD5 137131a8d5de17ad363c8a16317caafc
SHA1 9067bcca3e183b3d5bec4da114eff1de764843d6
SHA512 8ccf84deb0372f5a834d988887dcd9acbefa8fefa4ffdb225eafb50827ff1db8bb5c98074b2d4c2d188761303634c22064a87cb8ebf781ed535ad39c14767285
SSDEEP 49152:Pvkt62XlaSFNWPjljiFa2RoUYISdQebRRaLoGduTHHB72eh2NT:Pv462XlaSFNWPjljiFXRoUYISdQwE
MD5 SHA1 SHA512 SSDEEP

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memory/2232-0-0x00000000010C0000-0x00000000013E4000-memory.dmp

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memory/2232-1-0x000007FEF4CC0000-0x000007FEF56AC000-memory.dmp

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memory/2232-2-0x000000001B110000-0x000000001B190000-memory.dmp

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memory/2232-8-0x000007FEF4CC0000-0x000007FEF56AC000-memory.dmp

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memory/2952-10-0x000007FEF4CC0000-0x000007FEF56AC000-memory.dmp

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memory/2952-9-0x0000000000390000-0x00000000006B4000-memory.dmp

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memory/2952-11-0x000000001AE50000-0x000000001AED0000-memory.dmp

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memory/2952-12-0x000007FEF4CC0000-0x000007FEF56AC000-memory.dmp

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memory/2952-13-0x000000001AE50000-0x000000001AED0000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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