quasar | 41ed0732dc7032c3e345ea7dfa9522803d2b306e1ef149ebdd74f7ecfe9f17e8

General

Target

svchost.exe
Size

409KB
MD5

e8d65fc5ddc235ab81a78b0caebe13c8
SHA1

f2200ae68ba21fbbf7e854281e4ab636e3a256e3
SHA256

41ed0732dc7032c3e345ea7dfa9522803d2b306e1ef149ebdd74f7ecfe9f17e8
SHA512

afe6cf22e57eac8589d1e2fbf198eee75795969a5f2e81a804a2569e411a16a161d618e7edc2b816ec55b0bfba4ea9c33f017af51d6f382076c517ab7b93f30c
SSDEEP

12288:qpiREGJMIexhVD+R5aa9vM4DRShuISW2JM:uwpJUi39vM4DRAuQ

Score

10^/10

quasar seroxen | v3.1.5 |discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen | v3.1.5 |

C2

dating-mpegs.gl.at.ply.gg:6566

Mutex

$Sxr-jy6vh8CtEJL5ceZuIb

Attributes

encryption_key
M1SAZZUtbnQqZ8RvEnLb
install_name
$sxr-powershell.exe
log_directory
$sxr-Logs
reconnect_delay
3000
startup_key
Powershell
subdirectory
$sxr-seroxen2

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2768-1-0x0000000000DC0000-0x0000000000E2C000-memory.dmp	family_quasar
behavioral2/files/0x0009000000023585-10.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5052	$sxr-powershell.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
9	ip-api.com

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe	$sxr-powershell.exe
File opened for modification	C:\Windows\SysWOW64\$sxr-seroxen2	$sxr-powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	$sxr-powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SCHTASKS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1712	SCHTASKS.exe
1864	schtasks.exe
4244	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2768	svchost.exe
Token: SeDebugPrivilege	5052	$sxr-powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5052	$sxr-powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 4244	2768	svchost.exe	94
PID 2768 wrote to memory of 4244	2768	svchost.exe	94
PID 2768 wrote to memory of 4244	2768	svchost.exe	94
PID 2768 wrote to memory of 5052	2768	svchost.exe	96
PID 2768 wrote to memory of 5052	2768	svchost.exe	96
PID 2768 wrote to memory of 5052	2768	svchost.exe	96
PID 2768 wrote to memory of 1712	2768	svchost.exe	97
PID 2768 wrote to memory of 1712	2768	svchost.exe	97
PID 2768 wrote to memory of 1712	2768	svchost.exe	97
PID 5052 wrote to memory of 1864	5052	$sxr-powershell.exe	99
PID 5052 wrote to memory of 1864	5052	$sxr-powershell.exe	99
PID 5052 wrote to memory of 1864	5052	$sxr-powershell.exe	99

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4244
- C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe
  "C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5052
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1864
- C:\Windows\SysWOW64\SCHTASKS.exe
  "SCHTASKS.exe" /create /tn "$77svchost.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\svchost.exe'" /sc onlogon /rl HIGHEST
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1712

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4508,i,16315016104747277319,5510969007830467313,262144 --variations-seed-version --mojo-platform-channel-handle=1904 /prefetch:8
1⤵
PID:3308

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe

Filesize
409KB

MD5
e8d65fc5ddc235ab81a78b0caebe13c8

SHA1
f2200ae68ba21fbbf7e854281e4ab636e3a256e3

SHA256
41ed0732dc7032c3e345ea7dfa9522803d2b306e1ef149ebdd74f7ecfe9f17e8

SHA512
afe6cf22e57eac8589d1e2fbf198eee75795969a5f2e81a804a2569e411a16a161d618e7edc2b816ec55b0bfba4ea9c33f017af51d6f382076c517ab7b93f30c

Download Submit
memory/2768-6-0x00000000070A0000-0x00000000070DC000-memory.dmp

Filesize
240KB

Download
memory/2768-2-0x00000000065B0000-0x0000000006B54000-memory.dmp

Filesize
5.6MB

Download
memory/2768-3-0x0000000006000000-0x0000000006092000-memory.dmp

Filesize
584KB

Download
memory/2768-4-0x0000000005D70000-0x0000000005DD6000-memory.dmp

Filesize
408KB

Download
memory/2768-5-0x0000000006C80000-0x0000000006C92000-memory.dmp

Filesize
72KB

Download
memory/2768-0-0x0000000074C6E000-0x0000000074C6F000-memory.dmp

Filesize
4KB

Download
memory/2768-1-0x0000000000DC0000-0x0000000000E2C000-memory.dmp

Filesize
432KB

Download
memory/5052-12-0x0000000074C60000-0x0000000075410000-memory.dmp

Filesize
7.7MB

Download
memory/5052-13-0x0000000074C60000-0x0000000075410000-memory.dmp

Filesize
7.7MB

Download
memory/5052-16-0x00000000063F0000-0x00000000063FA000-memory.dmp

Filesize
40KB

Download
memory/5052-17-0x0000000074C60000-0x0000000075410000-memory.dmp

Filesize
7.7MB

Download
memory/5052-18-0x0000000074C60000-0x0000000075410000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads