quasar | 3d5f7b3325f260dc291e2b1c24c54818d2edcde5527ef31168016ae9aad25fc6

Analysis

max time kernel
120s
max time network
141s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
09-01-2025 11:56

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General

Target

dogecoin-1.14.9-win32/dogecore.exe
Size

1.4MB
MD5

a412fa073a2b48c547f7afd8a9341d51
SHA1

c85ba3bc4a0352db1d6e8da0002cfcb5a8006aed
SHA256

631d517636bf46e596ec6b150c19165e89a900290fcfda2d63d914f64e6ba7cd
SHA512

e11e6a15d17c7d72efa064d1bf1712a5f170055cf4e657df7db307dbca4a5bdc390496f11735f4be2b8c1197042c61cb13ddcff695756ffd08cf9841e40c2664
SSDEEP

12288:6tGo9MjVyuQxY+wTDCWJZfeXetmPtWb1tt1CX1Rfg1i61xSxbN1Km1RQQI13h1AC:p7rXDBPeXALlSVLukdoo8q

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

RAJARUS817.mooo.com:1555

Mutex

QSR_MUTEX_W6w7FxAeflnmbVB0X8

Attributes

encryption_key
Tp9dx8nrMunH9hPbac6o
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral7/memory/2200-27-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral7/memory/2200-25-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral7/memory/2200-32-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral7/memory/2200-35-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral7/memory/2200-33-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kakaotalk.lnk	dogecore.exe

Executes dropped EXE 1 IoCs

pid	Process
2936	kakaotalk.exe

Loads dropped DLL 2 IoCs

pid	Process
2112	cmd.exe
2112	cmd.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2936 set thread context of 2200	2936	kakaotalk.exe	36

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

System Information Discovery
T1082

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	dogecore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kakaotalk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 3 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2112	cmd.exe
2920	PING.EXE
2752	PING.EXE

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
2920	PING.EXE
2752	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3020	dogecore.exe
3020	dogecore.exe
3020	dogecore.exe
3020	dogecore.exe
3020	dogecore.exe
3020	dogecore.exe
2936	kakaotalk.exe
2936	kakaotalk.exe
2936	kakaotalk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3020	dogecore.exe
Token: SeDebugPrivilege	2936	kakaotalk.exe
Token: SeDebugPrivilege	2200	InstallUtil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2200	InstallUtil.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 3020 wrote to memory of 2112	3020	dogecore.exe	30
PID 3020 wrote to memory of 2112	3020	dogecore.exe	30
PID 3020 wrote to memory of 2112	3020	dogecore.exe	30
PID 3020 wrote to memory of 2112	3020	dogecore.exe	30
PID 2112 wrote to memory of 2920	2112	cmd.exe	32
PID 2112 wrote to memory of 2920	2112	cmd.exe	32
PID 2112 wrote to memory of 2920	2112	cmd.exe	32
PID 2112 wrote to memory of 2920	2112	cmd.exe	32
PID 2112 wrote to memory of 2752	2112	cmd.exe	34
PID 2112 wrote to memory of 2752	2112	cmd.exe	34
PID 2112 wrote to memory of 2752	2112	cmd.exe	34
PID 2112 wrote to memory of 2752	2112	cmd.exe	34
PID 2112 wrote to memory of 2936	2112	cmd.exe	35
PID 2112 wrote to memory of 2936	2112	cmd.exe	35
PID 2112 wrote to memory of 2936	2112	cmd.exe	35
PID 2112 wrote to memory of 2936	2112	cmd.exe	35
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36
PID 2936 wrote to memory of 2200	2936	kakaotalk.exe	36

C:\Users\Admin\AppData\Local\Temp\dogecoin-1.14.9-win32\dogecore.exe
"C:\Users\Admin\AppData\Local\Temp\dogecoin-1.14.9-win32\dogecore.exe"
1⤵
- Drops startup file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3020
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 9 > nul && copy "C:\Users\Admin\AppData\Local\Temp\dogecoin-1.14.9-win32\dogecore.exe" "C:\Users\Admin\Documents\kakao\kakaotalk.exe" && ping 127.0.0.1 -n 9 > nul && "C:\Users\Admin\Documents\kakao\kakaotalk.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2112
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 9
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2920
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 9
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2752
- - C:\Users\Admin\Documents\kakao\kakaotalk.exe
    "C:\Users\Admin\Documents\kakao\kakaotalk.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:2936
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:2200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\Documents\kakao\kakaotalk.exe

Filesize
1.4MB

MD5
a412fa073a2b48c547f7afd8a9341d51

SHA1
c85ba3bc4a0352db1d6e8da0002cfcb5a8006aed

SHA256
631d517636bf46e596ec6b150c19165e89a900290fcfda2d63d914f64e6ba7cd

SHA512
e11e6a15d17c7d72efa064d1bf1712a5f170055cf4e657df7db307dbca4a5bdc390496f11735f4be2b8c1197042c61cb13ddcff695756ffd08cf9841e40c2664

Download Submit
memory/2200-23-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2200-25-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2200-21-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2200-27-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2200-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2200-33-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2200-35-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2200-32-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2936-31-0x0000000073650000-0x0000000073D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2936-20-0x00000000007A0000-0x00000000007A6000-memory.dmp

Filesize
24KB

Download
memory/2936-19-0x0000000000840000-0x000000000085A000-memory.dmp

Filesize
104KB

Download
memory/2936-30-0x000000007365E000-0x000000007365F000-memory.dmp

Filesize
4KB

Download
memory/2936-18-0x0000000073650000-0x0000000073D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2936-36-0x0000000073650000-0x0000000073D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2936-17-0x0000000000C70000-0x0000000000DE2000-memory.dmp

Filesize
1.4MB

Download
memory/2936-16-0x000000007365E000-0x000000007365F000-memory.dmp

Filesize
4KB

Download
memory/3020-3-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-1-0x0000000000FE0000-0x0000000001152000-memory.dmp

Filesize
1.4MB

Download
memory/3020-5-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-0-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/3020-2-0x0000000000870000-0x00000000008B2000-memory.dmp

Filesize
264KB

Download