quasar | 03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd

General

Target

03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe
Size

1.7MB
MD5

3a9f26f591eea148881df705db331380
SHA1

28cf6555dc5df449b8d22fb01180552a1bdc74f9
SHA256

03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd
SHA512

d3e62d0a83ea378a16f805338e11a79c9d4d9bf25442462a34fb08488ec59ebb119b1618c42837d5db2c7431c48500db309527d8a941378608e341db432873ed
SSDEEP

24576:PUxJIRCRoenYQb6VOJ8Kgn1beVuumyEU:

Score

10^/10

quasar cio persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Cio

C2

162.19.131.197:4782

Mutex

c5fdf017-8f44-47ea-a69e-0b82e4044ca7

Attributes

encryption_key
59A92039F951E5069C9F50FD9F340E759713B058
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 payload 6 IoCs

resource	yara_rule
behavioral1/memory/1868-64-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1868-65-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1868-66-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1868-69-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1868-67-0x000000000047E79E-mapping.dmp	family_quasar
behavioral1/memory/1868-71-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\Jlnprgcxco = "\"C:\\Users\\Admin\\AppData\\Roaming\\Eqbuy\\Jlnprgcxco.exe\""	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1956 set thread context of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe
1760	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe
Token: SeDebugPrivilege	1760	powershell.exe
Token: SeDebugPrivilege	1868	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1868	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1760	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	27
PID 1956 wrote to memory of 1760	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	27
PID 1956 wrote to memory of 1760	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	27
PID 1956 wrote to memory of 1760	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	27
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29
PID 1956 wrote to memory of 1868	1956	03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe	29

C:\Users\Admin\AppData\Local\Temp\03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe
"C:\Users\Admin\AppData\Local\Temp\03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQA1AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1760
- C:\Users\Admin\AppData\Local\Temp\03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe
  C:\Users\Admin\AppData\Local\Temp\03543b1c5bfd9393444c098e18ab1ab2fdd450d8544f8fd4019f2ddb4b764edd.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1868

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1760-60-0x000000006F360000-0x000000006F90B000-memory.dmp

Filesize
5.7MB

Download
memory/1760-58-0x0000000075141000-0x0000000075143000-memory.dmp

Filesize
8KB

Download
memory/1760-59-0x000000006F360000-0x000000006F90B000-memory.dmp

Filesize
5.7MB

Download
memory/1868-65-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1868-62-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1868-64-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1868-61-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1868-66-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1868-69-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1868-71-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1956-56-0x0000000002450000-0x00000000024E2000-memory.dmp

Filesize
584KB

Download
memory/1956-55-0x0000000004A90000-0x0000000004B72000-memory.dmp

Filesize
904KB

Download
memory/1956-54-0x0000000000880000-0x0000000000A40000-memory.dmp

Filesize
1.8MB

Download

Analysis

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