quasar | 858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
27/11/2022, 17:16

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General

Target
Estado de cuenta.xls
Size 369KB
Sample221127-vs5t5ahe7x
SHA256 858963fa777ab0af515f7a81ff5ce29ffdda5361c67137cf0be35095bc7f1d9b
MD5 f5a8b72709235c68196a397174152660
SHA1 ab863a70358f150e3f0da53c330f7226d46037f4
SHA512 f3b247cbec98ea8423358b589dde1fb5ea17b66efe169e68536cf901f9309e34c3f9883125fd153908150ae680292987b286ede90b461875ac0557ba368579f1
SSDEEP 6144:exEtjPOtioVjDGUU1qfDlavx+W2QnAbwYqzklWhUPheJl7Gpe8Kg2nOQcSRWQSSL:GwYqzklavDiknOfySloh16I
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar hop persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

dnuocc.com:64594
www.dnuocc.com:64594

Mutex

QSR_MUTEX_gKkre5ge46OKHHYV4m

Attributes

encryption_key
MWS1P9A8h60dOGbuRmwt
install_name
hvc.exe
log_directory
Logs
reconnect_delay
4000
startup_key
hrr
subdirectory
hik

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral2/memory/4304-146-0x0000000000000000-mapping.dmp	family_quasar
behavioral2/memory/4304-147-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral2/memory/628-157-0x0000000000000000-mapping.dmp	family_quasar

Executes dropped EXE 4 IoCs

pid	Process
4248	CYIGRD.exe
4304	CYIGRD.exe
4184	hvc.exe
628	hvc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\hrr = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Recent\\CYIGRD.exe\""	CYIGRD.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\hrr = "\"C:\\Users\\Admin\\AppData\\Roaming\\hik\\hvc.exe\""	hvc.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
58	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4248 set thread context of 4304	4248	CYIGRD.exe	86
PID 4184 set thread context of 628	4184	hvc.exe	90

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.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

T1053

pid	Process
4532	schtasks.exe
2300	schtasks.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2164	EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4248	CYIGRD.exe
Token: SeDebugPrivilege	4304	CYIGRD.exe
Token: SeDebugPrivilege	4184	hvc.exe
Token: SeDebugPrivilege	628	hvc.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE
2164	EXCEL.EXE

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 4248	2164	EXCEL.EXE	83
PID 2164 wrote to memory of 4248	2164	EXCEL.EXE	83
PID 2164 wrote to memory of 4248	2164	EXCEL.EXE	83
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4248 wrote to memory of 4304	4248	CYIGRD.exe	86
PID 4304 wrote to memory of 4532	4304	CYIGRD.exe	87
PID 4304 wrote to memory of 4532	4304	CYIGRD.exe	87
PID 4304 wrote to memory of 4532	4304	CYIGRD.exe	87
PID 4304 wrote to memory of 4184	4304	CYIGRD.exe	89
PID 4304 wrote to memory of 4184	4304	CYIGRD.exe	89
PID 4304 wrote to memory of 4184	4304	CYIGRD.exe	89
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 4184 wrote to memory of 628	4184	hvc.exe	90
PID 628 wrote to memory of 2300	628	hvc.exe	91
PID 628 wrote to memory of 2300	628	hvc.exe	91
PID 628 wrote to memory of 2300	628	hvc.exe	91

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Estado de cuenta.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4248
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4304
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "hrr" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:4532
  - - C:\Users\Admin\AppData\Roaming\hik\hvc.exe
      "C:\Users\Admin\AppData\Roaming\hik\hvc.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4184
    - - C:\Users\Admin\AppData\Roaming\hik\hvc.exe
        
        C:\Users\Admin\AppData\Roaming\hik\hvc.exe
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:628
      - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "hrr" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\hik\hvc.exe" /rl HIGHEST /f
        6⤵
        Creates scheduled task(s)
        
        PID:2300

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

CYIGRD.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\CYIGRD.exe.log
Size 706B
SHA256 0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339
MD5 d95c58e609838928f0f49837cab7dfd2
SHA1 55e7139a1e3899195b92ed8771d1ca2c7d53c916
SHA512 405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d
MD5 SHA1 SHA512

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CYIGRD.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe
Size 917KB
SHA256 136eb98aff2b23e84a6c07c1bf90ac429183ffb04e108560448410335699342c
MD5 66c608ebad371c4ba492b284f7a80411
SHA1 8bc9f6aa4c94407f0da697f3c7ff44fb02d29497
SHA512 641aad97ab54381e18a4d74b0f95863876063e037d8c74155b67ccde2f0666f1bba6330264a90ff8715fd3a2f7832264f9128fd1a95002c44b6084edfa11678e
SSDEEP 12288:Ob+7hSF+G5Ax7VhtUHxHkbf90VrSzO/GjIVJEGiM4h8977+VyqRHMqaMn9P68sV0:WSwcLekbf+VrmOejIVGQ4h8VsWqaM9/
MD5 SHA1 SHA512 SSDEEP

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CYIGRD.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe
Size 917KB
SHA256 136eb98aff2b23e84a6c07c1bf90ac429183ffb04e108560448410335699342c
MD5 66c608ebad371c4ba492b284f7a80411
SHA1 8bc9f6aa4c94407f0da697f3c7ff44fb02d29497
SHA512 641aad97ab54381e18a4d74b0f95863876063e037d8c74155b67ccde2f0666f1bba6330264a90ff8715fd3a2f7832264f9128fd1a95002c44b6084edfa11678e
SSDEEP 12288:Ob+7hSF+G5Ax7VhtUHxHkbf90VrSzO/GjIVJEGiM4h8977+VyqRHMqaMn9P68sV0:WSwcLekbf+VrmOejIVGQ4h8VsWqaM9/
MD5 SHA1 SHA512 SSDEEP

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CYIGRD.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CYIGRD.exe
Size 917KB
SHA256 136eb98aff2b23e84a6c07c1bf90ac429183ffb04e108560448410335699342c
MD5 66c608ebad371c4ba492b284f7a80411
SHA1 8bc9f6aa4c94407f0da697f3c7ff44fb02d29497
SHA512 641aad97ab54381e18a4d74b0f95863876063e037d8c74155b67ccde2f0666f1bba6330264a90ff8715fd3a2f7832264f9128fd1a95002c44b6084edfa11678e
SSDEEP 12288:Ob+7hSF+G5Ax7VhtUHxHkbf90VrSzO/GjIVJEGiM4h8977+VyqRHMqaMn9P68sV0:WSwcLekbf+VrmOejIVGQ4h8VsWqaM9/
MD5 SHA1 SHA512 SSDEEP

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hvc.exe

Path C:\Users\Admin\AppData\Roaming\hik\hvc.exe
Size 917KB
SHA256 136eb98aff2b23e84a6c07c1bf90ac429183ffb04e108560448410335699342c
MD5 66c608ebad371c4ba492b284f7a80411
SHA1 8bc9f6aa4c94407f0da697f3c7ff44fb02d29497
SHA512 641aad97ab54381e18a4d74b0f95863876063e037d8c74155b67ccde2f0666f1bba6330264a90ff8715fd3a2f7832264f9128fd1a95002c44b6084edfa11678e
SSDEEP 12288:Ob+7hSF+G5Ax7VhtUHxHkbf90VrSzO/GjIVJEGiM4h8977+VyqRHMqaMn9P68sV0:WSwcLekbf+VrmOejIVGQ4h8VsWqaM9/
MD5 SHA1 SHA512 SSDEEP

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hvc.exe

Path C:\Users\Admin\AppData\Roaming\hik\hvc.exe
Size 917KB
SHA256 136eb98aff2b23e84a6c07c1bf90ac429183ffb04e108560448410335699342c
MD5 66c608ebad371c4ba492b284f7a80411
SHA1 8bc9f6aa4c94407f0da697f3c7ff44fb02d29497
SHA512 641aad97ab54381e18a4d74b0f95863876063e037d8c74155b67ccde2f0666f1bba6330264a90ff8715fd3a2f7832264f9128fd1a95002c44b6084edfa11678e
SSDEEP 12288:Ob+7hSF+G5Ax7VhtUHxHkbf90VrSzO/GjIVJEGiM4h8977+VyqRHMqaMn9P68sV0:WSwcLekbf+VrmOejIVGQ4h8VsWqaM9/
MD5 SHA1 SHA512 SSDEEP

Submit Download

hvc.exe

Path C:\Users\Admin\AppData\Roaming\hik\hvc.exe
Size 917KB
SHA256 136eb98aff2b23e84a6c07c1bf90ac429183ffb04e108560448410335699342c
MD5 66c608ebad371c4ba492b284f7a80411
SHA1 8bc9f6aa4c94407f0da697f3c7ff44fb02d29497
SHA512 641aad97ab54381e18a4d74b0f95863876063e037d8c74155b67ccde2f0666f1bba6330264a90ff8715fd3a2f7832264f9128fd1a95002c44b6084edfa11678e
SSDEEP 12288:Ob+7hSF+G5Ax7VhtUHxHkbf90VrSzO/GjIVJEGiM4h8977+VyqRHMqaMn9P68sV0:WSwcLekbf+VrmOejIVGQ4h8VsWqaM9/
MD5 SHA1 SHA512 SSDEEP

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memory/628-161-0x0000000006630000-0x000000000663A000-memory.dmp

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memory/2164-132-0x00007FFA45370000-0x00007FFA45380000-memory.dmp

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memory/2164-138-0x00007FFA42FA0000-0x00007FFA42FB0000-memory.dmp

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memory/2164-137-0x00007FFA42FA0000-0x00007FFA42FB0000-memory.dmp

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memory/2164-136-0x00007FFA45370000-0x00007FFA45380000-memory.dmp

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memory/2164-135-0x00007FFA45370000-0x00007FFA45380000-memory.dmp

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memory/2164-133-0x00007FFA45370000-0x00007FFA45380000-memory.dmp

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memory/2164-134-0x00007FFA45370000-0x00007FFA45380000-memory.dmp

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memory/4248-145-0x000000000E1B0000-0x000000000E242000-memory.dmp

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memory/4248-144-0x000000000E6C0000-0x000000000EC64000-memory.dmp

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memory/4248-143-0x000000000E070000-0x000000000E10C000-memory.dmp

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memory/4248-142-0x00000000008E0000-0x00000000009CE000-memory.dmp

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memory/4304-151-0x0000000006580000-0x00000000065BC000-memory.dmp

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memory/4304-150-0x0000000006020000-0x0000000006032000-memory.dmp

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memory/4304-149-0x0000000004FF0000-0x0000000005056000-memory.dmp

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memory/4304-147-0x0000000000400000-0x000000000045E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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