quasar | fbbb647aeb0707b5897f74bc3616b275406c6fce1ac0409a6f582fdfcc2de147

General

Target

6e5babe25aad66144dd2e15ab97bd38b.exe
Size

385KB
MD5

6e5babe25aad66144dd2e15ab97bd38b
SHA1

61d589a0814a1ef9a0b1a06454f9761fe81ddbff
SHA256

fbbb647aeb0707b5897f74bc3616b275406c6fce1ac0409a6f582fdfcc2de147
SHA512

6547309b05f1ffec63c5ea9c92bb536d37ca1b7104df936324ba19dfb53dff0aa9135f3a9bd4aa0ae46a210048db9b5694424e00bd47e2cb2ab63df5a4f52896
SSDEEP

6144:F8jlR5z3XxhxrL8rK/A0j1/zTzTLNozbLRpw34urkR10efUK0:FMlHzHxhV/Aqipw3XQztfK

Score

10^/10

quasar down persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Down

C2

simplmizer.duckdns.org:1337

Mutex

rhoc35VS3mkrMtkPb1

Attributes

encryption_key
AN1JmoUwwzfA1Metx4Ze
install_name
taskhost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
EdgeBrowser
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3208-133-0x0000000000BB0000-0x0000000000C16000-memory.dmp	family_quasar
C:\Windows\SysWOW64\SubDir\taskhost.exe	family_quasar
C:\Windows\SysWOW64\SubDir\taskhost.exe	family_quasar
C:\Windows\SysWOW64\SubDir\taskhost.exe	family_quasar
C:\Windows\SysWOW64\SubDir\taskhost.exe	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

taskhost.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\Control Panel\International\Geo\Nation	taskhost.exe

Executes dropped EXE 3 IoCs

Processes:

taskhost.exetaskhost.exetaskhost.exe

pid process

1440 taskhost.exe
416 taskhost.exe
4924 taskhost.exe

pid	process
1440	taskhost.exe
416	taskhost.exe
4924	taskhost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

taskhost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EdgeBrowser = "\"C:\\Windows\\SysWOW64\\SubDir\\taskhost.exe\""	taskhost.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

7 ip-api.com
Drops autorun.inf file 1 TTPs 2 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media
T1091

Processes:

taskhost.exe

description ioc process

File created C:\autorun.inf taskhost.exe
File created F:\autorun.inf taskhost.exe

flow	ioc
7	ip-api.com

description	ioc	process
File created	C:\autorun.inf	taskhost.exe
File created	F:\autorun.inf	taskhost.exe

Drops file in System32 directory 4 IoCs

Processes:

taskhost.exe6e5babe25aad66144dd2e15ab97bd38b.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\SubDir\taskhost.exe	taskhost.exe
File opened for modification	C:\Windows\SysWOW64\SubDir	taskhost.exe
File created	C:\Windows\SysWOW64\SubDir\taskhost.exe	6e5babe25aad66144dd2e15ab97bd38b.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\taskhost.exe	6e5babe25aad66144dd2e15ab97bd38b.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

3832 schtasks.exe
2216 schtasks.exe
828 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

6e5babe25aad66144dd2e15ab97bd38b.exetaskhost.exe

description pid process

Token: SeDebugPrivilege 3208 6e5babe25aad66144dd2e15ab97bd38b.exe
Token: SeDebugPrivilege 1440 taskhost.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

taskhost.exe

pid process

1440 taskhost.exe

pid	process
3832	schtasks.exe
2216	schtasks.exe
828	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3208	6e5babe25aad66144dd2e15ab97bd38b.exe
Token: SeDebugPrivilege	1440	taskhost.exe

pid	process
1440	taskhost.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

6e5babe25aad66144dd2e15ab97bd38b.exetaskhost.exe

description	pid	process	target process
PID 3208 wrote to memory of 3832	3208	6e5babe25aad66144dd2e15ab97bd38b.exe	schtasks.exe
PID 3208 wrote to memory of 3832	3208	6e5babe25aad66144dd2e15ab97bd38b.exe	schtasks.exe
PID 3208 wrote to memory of 3832	3208	6e5babe25aad66144dd2e15ab97bd38b.exe	schtasks.exe
PID 3208 wrote to memory of 1440	3208	6e5babe25aad66144dd2e15ab97bd38b.exe	taskhost.exe
PID 3208 wrote to memory of 1440	3208	6e5babe25aad66144dd2e15ab97bd38b.exe	taskhost.exe
PID 3208 wrote to memory of 1440	3208	6e5babe25aad66144dd2e15ab97bd38b.exe	taskhost.exe
PID 1440 wrote to memory of 2216	1440	taskhost.exe	schtasks.exe
PID 1440 wrote to memory of 2216	1440	taskhost.exe	schtasks.exe
PID 1440 wrote to memory of 2216	1440	taskhost.exe	schtasks.exe
PID 1440 wrote to memory of 828	1440	taskhost.exe	schtasks.exe
PID 1440 wrote to memory of 828	1440	taskhost.exe	schtasks.exe
PID 1440 wrote to memory of 828	1440	taskhost.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\6e5babe25aad66144dd2e15ab97bd38b.exe
"C:\Users\Admin\AppData\Local\Temp\6e5babe25aad66144dd2e15ab97bd38b.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3208

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "EdgeBrowser" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\6e5babe25aad66144dd2e15ab97bd38b.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:3832

C:\Windows\SysWOW64\SubDir\taskhost.exe
"C:\Windows\SysWOW64\SubDir\taskhost.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Drops autorun.inf file
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1440

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "EdgeBrowser" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\taskhost.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2216

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /tn "WINDOWSSYSTEMHOST" /tr "C:\Windows\SysWOW64\SubDir\taskhost.exe" /sc MINUTE /MO 1
3⤵
- Creates scheduled task(s)
PID:828

C:\Windows\SysWOW64\SubDir\taskhost.exe
C:\Windows\SysWOW64\SubDir\taskhost.exe
1⤵
- Executes dropped EXE
PID:416

C:\Windows\SysWOW64\SubDir\taskhost.exe
C:\Windows\SysWOW64\SubDir\taskhost.exe
1⤵
- Executes dropped EXE
PID:4924

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Replication Through Removable Media

1

T1091

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Replication Through Removable Media

1

T1091

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\taskhost.exe.log
Filesize
701B

MD5
5de8527438c860bfa3140dc420a03e52

SHA1
235af682986b3292f20d8d71a8671353f5d6e16d

SHA256
d9d92cd6e7a4507912965138b8d1eabb3f188f4dfcb61115ee99dc2c0fd43a92

SHA512
77c3a774a2235c55ad520f1bf0c71fa3d3f0e7cf478a78e0d4dd6d253ee12a9859acc9ee822664467387788a2655a18373c8fcf08ea0d001549d3d4391b00bf8

Download Submit
C:\Windows\SysWOW64\SubDir\taskhost.exe
Filesize
385KB

MD5
6e5babe25aad66144dd2e15ab97bd38b

SHA1
61d589a0814a1ef9a0b1a06454f9761fe81ddbff

SHA256
fbbb647aeb0707b5897f74bc3616b275406c6fce1ac0409a6f582fdfcc2de147

SHA512
6547309b05f1ffec63c5ea9c92bb536d37ca1b7104df936324ba19dfb53dff0aa9135f3a9bd4aa0ae46a210048db9b5694424e00bd47e2cb2ab63df5a4f52896

Download Submit
C:\Windows\SysWOW64\SubDir\taskhost.exe
Filesize
385KB

MD5
6e5babe25aad66144dd2e15ab97bd38b

SHA1
61d589a0814a1ef9a0b1a06454f9761fe81ddbff

SHA256
fbbb647aeb0707b5897f74bc3616b275406c6fce1ac0409a6f582fdfcc2de147

SHA512
6547309b05f1ffec63c5ea9c92bb536d37ca1b7104df936324ba19dfb53dff0aa9135f3a9bd4aa0ae46a210048db9b5694424e00bd47e2cb2ab63df5a4f52896

Download Submit
C:\Windows\SysWOW64\SubDir\taskhost.exe
Filesize
385KB

MD5
6e5babe25aad66144dd2e15ab97bd38b

SHA1
61d589a0814a1ef9a0b1a06454f9761fe81ddbff

SHA256
fbbb647aeb0707b5897f74bc3616b275406c6fce1ac0409a6f582fdfcc2de147

SHA512
6547309b05f1ffec63c5ea9c92bb536d37ca1b7104df936324ba19dfb53dff0aa9135f3a9bd4aa0ae46a210048db9b5694424e00bd47e2cb2ab63df5a4f52896

Download Submit
C:\Windows\SysWOW64\SubDir\taskhost.exe
Filesize
385KB

MD5
6e5babe25aad66144dd2e15ab97bd38b

SHA1
61d589a0814a1ef9a0b1a06454f9761fe81ddbff

SHA256
fbbb647aeb0707b5897f74bc3616b275406c6fce1ac0409a6f582fdfcc2de147

SHA512
6547309b05f1ffec63c5ea9c92bb536d37ca1b7104df936324ba19dfb53dff0aa9135f3a9bd4aa0ae46a210048db9b5694424e00bd47e2cb2ab63df5a4f52896

Download Submit
memory/416-153-0x0000000005910000-0x0000000005920000-memory.dmp

Filesize
64KB

Download
memory/1440-148-0x0000000007510000-0x000000000751A000-memory.dmp

Filesize
40KB

Download
memory/1440-146-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download
memory/1440-151-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download
memory/3208-136-0x0000000005600000-0x0000000005610000-memory.dmp

Filesize
64KB

Download
memory/3208-135-0x0000000005610000-0x00000000056A2000-memory.dmp

Filesize
584KB

Download
memory/3208-137-0x00000000059D0000-0x0000000005A36000-memory.dmp

Filesize
408KB

Download
memory/3208-133-0x0000000000BB0000-0x0000000000C16000-memory.dmp

Filesize
408KB

Download
memory/3208-139-0x0000000006A30000-0x0000000006A6C000-memory.dmp

Filesize
240KB

Download
memory/3208-138-0x0000000006610000-0x0000000006622000-memory.dmp

Filesize
72KB

Download
memory/3208-134-0x0000000005C80000-0x0000000006224000-memory.dmp

Filesize
5.6MB

Download
memory/4924-157-0x0000000005670000-0x0000000005680000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads