quasar | f47fae36937dabb1c97098581deb76302b10f5abdf77971626813dd158af341c

Analysis

max time kernel
143s
max time network
171s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 08:08

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General

Target

Pago.exe
Size

1.3MB
MD5

ce7d806c0c013d7a322071cb5e9d3ab7
SHA1

becd8d9257efa5df71f3a49edb5ea07da0511755
SHA256

f47fae36937dabb1c97098581deb76302b10f5abdf77971626813dd158af341c
SHA512

c84c4c99cf9b986c06208ea6a283f5de67dd38f65d1344b9b7d03ce1ea19f03aa67c8467e0e454febc7532b4e82ccf908c73c740f2f54eb32cf13cddf14544ec
SSDEEP

24576:rGHCm8uPdJAg804Aa24gOYtHzl0GXtiHpH1uYIq3U/l5MHTU:quWpZt51oJklCzU

Score

10^/10

quasar yop spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

yop

dnuocc.com:64594

www.dnuocc.com:64594

Mutex

QSR_MUTEX_OyCjWKeFudCMEKYeJX

Attributes

encryption_key
In08tDaU6GKdLZ8HdsU1
install_name
yors.exe
log_directory
Logs
reconnect_delay
7000
startup_key
crdm
subdirectory
yilk

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1608-144-0x0000000000000000-mapping.dmp	family_quasar
behavioral2/memory/1608-145-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral2/memory/632-155-0x0000000000000000-mapping.dmp	family_quasar

Executes dropped EXE 5 IoCs

Processes:

xvxfd.sfx.exexvxfd.exexvxfd.exeyors.exeyors.exe

pid process

320 xvxfd.sfx.exe
4940 xvxfd.exe
1608 xvxfd.exe
3256 yors.exe
632 yors.exe

pid	process
320	xvxfd.sfx.exe
4940	xvxfd.exe
1608	xvxfd.exe
3256	yors.exe
632	yors.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

Pago.exexvxfd.sfx.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Pago.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	xvxfd.sfx.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.

Processes:

flow ioc

4 ip-api.com
Suspicious use of SetThreadContext 2 IoCs

Processes:

xvxfd.exeyors.exe

description pid process target process

PID 4940 set thread context of 1608 4940 xvxfd.exe xvxfd.exe
PID 3256 set thread context of 632 3256 yors.exe yors.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
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

Processes:

schtasks.exeschtasks.exe

pid process

744 schtasks.exe
1988 schtasks.exe

flow	ioc
4	ip-api.com

description	pid	process	target process
PID 4940 set thread context of 1608	4940	xvxfd.exe	xvxfd.exe
PID 3256 set thread context of 632	3256	yors.exe	yors.exe

pid	process
744	schtasks.exe
1988	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

xvxfd.exexvxfd.exeyors.exeyors.exe

description	pid	process
Token: SeDebugPrivilege	4940	xvxfd.exe
Token: SeDebugPrivilege	1608	xvxfd.exe
Token: SeDebugPrivilege	3256	yors.exe
Token: SeDebugPrivilege	632	yors.exe

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

Pago.execmd.exexvxfd.sfx.exexvxfd.exexvxfd.exeyors.exeyors.exe

description	pid	process	target process
PID 4264 wrote to memory of 2880	4264	Pago.exe	cmd.exe
PID 4264 wrote to memory of 2880	4264	Pago.exe	cmd.exe
PID 4264 wrote to memory of 2880	4264	Pago.exe	cmd.exe
PID 2880 wrote to memory of 320	2880	cmd.exe	xvxfd.sfx.exe
PID 2880 wrote to memory of 320	2880	cmd.exe	xvxfd.sfx.exe
PID 2880 wrote to memory of 320	2880	cmd.exe	xvxfd.sfx.exe
PID 320 wrote to memory of 4940	320	xvxfd.sfx.exe	xvxfd.exe
PID 320 wrote to memory of 4940	320	xvxfd.sfx.exe	xvxfd.exe
PID 320 wrote to memory of 4940	320	xvxfd.sfx.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 4940 wrote to memory of 1608	4940	xvxfd.exe	xvxfd.exe
PID 1608 wrote to memory of 744	1608	xvxfd.exe	schtasks.exe
PID 1608 wrote to memory of 744	1608	xvxfd.exe	schtasks.exe
PID 1608 wrote to memory of 744	1608	xvxfd.exe	schtasks.exe
PID 1608 wrote to memory of 3256	1608	xvxfd.exe	yors.exe
PID 1608 wrote to memory of 3256	1608	xvxfd.exe	yors.exe
PID 1608 wrote to memory of 3256	1608	xvxfd.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 3256 wrote to memory of 632	3256	yors.exe	yors.exe
PID 632 wrote to memory of 1988	632	yors.exe	schtasks.exe
PID 632 wrote to memory of 1988	632	yors.exe	schtasks.exe
PID 632 wrote to memory of 1988	632	yors.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Pago.exe
"C:\Users\Admin\AppData\Local\Temp\Pago.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4264

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\xvxfd.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:2880

C:\Users\Admin\AppData\Roaming\xvxfd.sfx.exe
xvxfd.sfx.exe -pgdpodHghkffiqewhkenfukjvcfjmvzgdbwvhlnbmcgjSKrgqdkfWEgunyngfionJjgbghjfmfhncknnsRumcjuzycGfhfjmfgjkfbracncgvoGgcjfimaabihqmkjkf -dC:\Users\Admin\AppData\Roaming
3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:320

C:\Users\Admin\AppData\Roaming\xvxfd.exe
"C:\Users\Admin\AppData\Roaming\xvxfd.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4940

C:\Users\Admin\AppData\Roaming\xvxfd.exe
C:\Users\Admin\AppData\Roaming\xvxfd.exe
5⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1608

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "crdm" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\xvxfd.exe" /rl HIGHEST /f
6⤵
- Creates scheduled task(s)
PID:744

C:\Users\Admin\AppData\Roaming\yilk\yors.exe
"C:\Users\Admin\AppData\Roaming\yilk\yors.exe"
6⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3256

C:\Users\Admin\AppData\Roaming\yilk\yors.exe
C:\Users\Admin\AppData\Roaming\yilk\yors.exe
7⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:632

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "crdm" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\yilk\yors.exe" /rl HIGHEST /f
8⤵
- Creates scheduled task(s)
PID:1988

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\xvxfd.exe.log

Filesize
706B

MD5
d95c58e609838928f0f49837cab7dfd2

SHA1
55e7139a1e3899195b92ed8771d1ca2c7d53c916

SHA256
0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339

SHA512
405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\yors.exe.log

Filesize
706B

MD5
d95c58e609838928f0f49837cab7dfd2

SHA1
55e7139a1e3899195b92ed8771d1ca2c7d53c916

SHA256
0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339

SHA512
405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d

Download Submit
C:\Users\Admin\AppData\Roaming\xvxfd.bat

Filesize
155B

MD5
48cc12502ba67cc623b77406fe8b4d3f

SHA1
64eb6494433226399f0bff9f21971d054adc93b2

SHA256
d5df28c2161494f02dcb9e672927c74aa66f2c390668000f0cbc65fa2307e8d2

SHA512
0da2192987fee8ae2c5d694c8768574728f10a3e2380c531f5ba4493e9dede2dad243d55c3fa32400b49e42d7c1189ebfa7c77225697c6f37a1d927e5096442c

Download Submit
C:\Users\Admin\AppData\Roaming\xvxfd.exe

Filesize
1.1MB

MD5
237faeb4da1c41cbce2ed05373fb0a99

SHA1
d013d2c627cae478c8b3c8c0b866ce9a4ff3f29b

SHA256
06a4b87db460ec80e2585b05d07c9ca022a8a50621f6f48f81776b8d634cbc86

SHA512
0aa021103959ca48cd1226f5f0925adde886087c263de74efca00c56eb0c73be68b19ea5705bccbc11bd8e807a9f10a649575dfd8d3ebe694c0c66db8404c100

Download Submit
C:\Users\Admin\AppData\Roaming\xvxfd.exe

Filesize
1.1MB

MD5
237faeb4da1c41cbce2ed05373fb0a99

SHA1
d013d2c627cae478c8b3c8c0b866ce9a4ff3f29b

SHA256
06a4b87db460ec80e2585b05d07c9ca022a8a50621f6f48f81776b8d634cbc86

SHA512
0aa021103959ca48cd1226f5f0925adde886087c263de74efca00c56eb0c73be68b19ea5705bccbc11bd8e807a9f10a649575dfd8d3ebe694c0c66db8404c100

Download Submit
C:\Users\Admin\AppData\Roaming\xvxfd.exe

Filesize
1.1MB

MD5
237faeb4da1c41cbce2ed05373fb0a99

SHA1
d013d2c627cae478c8b3c8c0b866ce9a4ff3f29b

SHA256
06a4b87db460ec80e2585b05d07c9ca022a8a50621f6f48f81776b8d634cbc86

SHA512
0aa021103959ca48cd1226f5f0925adde886087c263de74efca00c56eb0c73be68b19ea5705bccbc11bd8e807a9f10a649575dfd8d3ebe694c0c66db8404c100

Download Submit
C:\Users\Admin\AppData\Roaming\xvxfd.sfx.exe

Filesize
1.1MB

MD5
b574bd5cba33268ebe659b2c5ecebcd0

SHA1
404bd0181b06f2959d30147ade6282c3fde0b2e8

SHA256
0a959900f85b4ce16162922803176e9a587931ab36347f2217a5e542c2578191

SHA512
a96e283e6ad4aae467e3c95337173246dbf3878c098a83981c4fd384f99bb6d2ee040f0af34081222f22947e9e29943eff48d850a63f3030aee1dcfead16ab6e

Download Submit
C:\Users\Admin\AppData\Roaming\xvxfd.sfx.exe

Filesize
1.1MB

MD5
b574bd5cba33268ebe659b2c5ecebcd0

SHA1
404bd0181b06f2959d30147ade6282c3fde0b2e8

SHA256
0a959900f85b4ce16162922803176e9a587931ab36347f2217a5e542c2578191

SHA512
a96e283e6ad4aae467e3c95337173246dbf3878c098a83981c4fd384f99bb6d2ee040f0af34081222f22947e9e29943eff48d850a63f3030aee1dcfead16ab6e

Download Submit
C:\Users\Admin\AppData\Roaming\yilk\yors.exe

Filesize
1.1MB

MD5
237faeb4da1c41cbce2ed05373fb0a99

SHA1
d013d2c627cae478c8b3c8c0b866ce9a4ff3f29b

SHA256
06a4b87db460ec80e2585b05d07c9ca022a8a50621f6f48f81776b8d634cbc86

SHA512
0aa021103959ca48cd1226f5f0925adde886087c263de74efca00c56eb0c73be68b19ea5705bccbc11bd8e807a9f10a649575dfd8d3ebe694c0c66db8404c100

Download Submit
C:\Users\Admin\AppData\Roaming\yilk\yors.exe

Filesize
1.1MB

MD5
237faeb4da1c41cbce2ed05373fb0a99

SHA1
d013d2c627cae478c8b3c8c0b866ce9a4ff3f29b

SHA256
06a4b87db460ec80e2585b05d07c9ca022a8a50621f6f48f81776b8d634cbc86

SHA512
0aa021103959ca48cd1226f5f0925adde886087c263de74efca00c56eb0c73be68b19ea5705bccbc11bd8e807a9f10a649575dfd8d3ebe694c0c66db8404c100

Download Submit
C:\Users\Admin\AppData\Roaming\yilk\yors.exe

Filesize
1.1MB

MD5
237faeb4da1c41cbce2ed05373fb0a99

SHA1
d013d2c627cae478c8b3c8c0b866ce9a4ff3f29b

SHA256
06a4b87db460ec80e2585b05d07c9ca022a8a50621f6f48f81776b8d634cbc86

SHA512
0aa021103959ca48cd1226f5f0925adde886087c263de74efca00c56eb0c73be68b19ea5705bccbc11bd8e807a9f10a649575dfd8d3ebe694c0c66db8404c100

Download Submit
memory/320-134-0x0000000000000000-mapping.dmp

Download
memory/632-160-0x00000000066E0000-0x00000000066EA000-memory.dmp

Filesize
40KB

Download
memory/632-155-0x0000000000000000-mapping.dmp

Download
memory/744-150-0x0000000000000000-mapping.dmp

Download
memory/1608-148-0x00000000067C0000-0x00000000067D2000-memory.dmp

Filesize
72KB

Download
memory/1608-149-0x0000000006D20000-0x0000000006D5C000-memory.dmp

Filesize
240KB

Download
memory/1608-147-0x0000000005AC0000-0x0000000005B26000-memory.dmp

Filesize
408KB

Download
memory/1608-145-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1608-144-0x0000000000000000-mapping.dmp

Download
memory/1988-159-0x0000000000000000-mapping.dmp

Download
memory/2880-132-0x0000000000000000-mapping.dmp

Download
memory/3256-151-0x0000000000000000-mapping.dmp

Download
memory/4940-137-0x0000000000000000-mapping.dmp

Download
memory/4940-143-0x00000000082B0000-0x0000000008342000-memory.dmp

Filesize
584KB

Download
memory/4940-142-0x00000000087C0000-0x0000000008D64000-memory.dmp

Filesize
5.6MB

Download
memory/4940-141-0x0000000008170000-0x000000000820C000-memory.dmp

Filesize
624KB

Download
memory/4940-140-0x0000000000E20000-0x0000000000F3E000-memory.dmp

Filesize
1.1MB

Download