quasar | 35d51e82e11a00d9bad3dab068867af8ea3b9859aee47ffd0d1e92a06afd6859

General

Target

SeronTest.exe
Size

3.1MB
MD5

40d84af5b3499ad8d4485b8839db2f1e
SHA1

beba1013f026a44d45e15aaefb947cc40132d38d
SHA256

35d51e82e11a00d9bad3dab068867af8ea3b9859aee47ffd0d1e92a06afd6859
SHA512

4b7af63b4bbfd65584990bf14b7cf7088c7359dd5ff3d5d14c92d70c024e7c9ff8ecc9752cf830a2740fd2d30b88581083d81be6734492a29fcc6e211d1af07c
SSDEEP

49152:oee9cfJdeuEJD4iVUdzb7BGpNG+26vllqJ44hTorj+XyJ2pFnRcEHyaNkfc/hS4m:JgcRIjJDDVozb7BPCbGyrvJenyLyMmV

Score

10^/10

quasar seron discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Seron

C2

nigeboc465-58875.portmap.host:58875

Mutex

eb8602ec-8a0d-4322-b9a0-544571be5a2d

Attributes

encryption_key
8BD9150EEC3DA71ED82080D7AEB7C165A58C889F
install_name
f8mk7ZGwVUpulm.exe
log_directory
Logs
reconnect_delay
3000
startup_key
f8mk7ZGwVUpulm
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/2684-7-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
460	f8mk7ZGwVUpulm.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3704	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1312 set thread context of 2684	1312	SeronTest.exe	88

System Location Discovery: System Language Discovery 1 TTPs 7 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f8mk7ZGwVUpulm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SeronTest.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2760	schtasks.exe
1200	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1312	SeronTest.exe
1312	SeronTest.exe
1312	SeronTest.exe
3704	powershell.exe
3704	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1312	SeronTest.exe
Token: SeDebugPrivilege	3704	powershell.exe
Token: SeDebugPrivilege	2684	RegAsm.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1312 wrote to memory of 3704	1312	SeronTest.exe	82
PID 1312 wrote to memory of 3704	1312	SeronTest.exe	82
PID 1312 wrote to memory of 3704	1312	SeronTest.exe	82
PID 1312 wrote to memory of 2120	1312	SeronTest.exe	84
PID 1312 wrote to memory of 2120	1312	SeronTest.exe	84
PID 1312 wrote to memory of 2120	1312	SeronTest.exe	84
PID 1312 wrote to memory of 4752	1312	SeronTest.exe	86
PID 1312 wrote to memory of 4752	1312	SeronTest.exe	86
PID 1312 wrote to memory of 4752	1312	SeronTest.exe	86
PID 2120 wrote to memory of 1200	2120	cmd.exe	87
PID 2120 wrote to memory of 1200	2120	cmd.exe	87
PID 2120 wrote to memory of 1200	2120	cmd.exe	87
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 1312 wrote to memory of 2684	1312	SeronTest.exe	88
PID 2684 wrote to memory of 2760	2684	RegAsm.exe	89
PID 2684 wrote to memory of 2760	2684	RegAsm.exe	89
PID 2684 wrote to memory of 2760	2684	RegAsm.exe	89
PID 2684 wrote to memory of 460	2684	RegAsm.exe	91
PID 2684 wrote to memory of 460	2684	RegAsm.exe	91
PID 2684 wrote to memory of 460	2684	RegAsm.exe	91

C:\Users\Admin\AppData\Local\Temp\SeronTest.exe
"C:\Users\Admin\AppData\Local\Temp\SeronTest.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1312
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '' -Value '"C:\Users\Admin\AppData\Roaming\.exe"' -PropertyType 'String'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3704
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /C schtasks /create /tn \ /tr "C:\Users\Admin\AppData\Roaming\.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2120
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn \ /tr "C:\Users\Admin\AppData\Roaming\.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1200
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  PID:4752
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "f8mk7ZGwVUpulm" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2760
- - C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:460

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4lwcpoxf.r25.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
memory/460-32-0x0000000000670000-0x0000000000682000-memory.dmp

Filesize
72KB

Download
memory/1312-1-0x0000000000D70000-0x0000000001098000-memory.dmp

Filesize
3.2MB

Download
memory/1312-2-0x0000000006020000-0x00000000065C6000-memory.dmp

Filesize
5.6MB

Download
memory/1312-0-0x000000007503E000-0x000000007503F000-memory.dmp

Filesize
4KB

Download
memory/2684-25-0x0000000075030000-0x00000000757E1000-memory.dmp

Filesize
7.7MB

Download
memory/2684-31-0x0000000075030000-0x00000000757E1000-memory.dmp

Filesize
7.7MB

Download
memory/2684-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2684-11-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/2684-10-0x0000000075030000-0x00000000757E1000-memory.dmp

Filesize
7.7MB

Download
memory/2684-12-0x0000000005250000-0x000000000525A000-memory.dmp

Filesize
40KB

Download
memory/3704-28-0x0000000005DA0000-0x0000000005DEC000-memory.dmp

Filesize
304KB

Download
memory/3704-46-0x0000000007020000-0x00000000070C3000-memory.dmp

Filesize
652KB

Download
memory/3704-26-0x00000000058A0000-0x0000000005BF7000-memory.dmp

Filesize
3.3MB

Download
memory/3704-23-0x00000000057C0000-0x0000000005826000-memory.dmp

Filesize
408KB

Download
memory/3704-22-0x0000000005720000-0x0000000005742000-memory.dmp

Filesize
136KB

Download
memory/3704-27-0x0000000005D50000-0x0000000005D6E000-memory.dmp

Filesize
120KB

Download
memory/3704-9-0x0000000075030000-0x00000000757E1000-memory.dmp

Filesize
7.7MB

Download
memory/3704-6-0x0000000004FF0000-0x00000000056BA000-memory.dmp

Filesize
6.8MB

Download
memory/3704-5-0x0000000075030000-0x00000000757E1000-memory.dmp

Filesize
7.7MB

Download
memory/3704-4-0x0000000004740000-0x0000000004776000-memory.dmp

Filesize
216KB

Download
memory/3704-34-0x0000000006F60000-0x0000000006F92000-memory.dmp

Filesize
200KB

Download
memory/3704-35-0x0000000072DB0000-0x0000000072DFC000-memory.dmp

Filesize
304KB

Download
memory/3704-45-0x0000000006350000-0x000000000636E000-memory.dmp

Filesize
120KB

Download
memory/3704-24-0x0000000005830000-0x0000000005896000-memory.dmp

Filesize
408KB

Download
memory/3704-47-0x0000000007780000-0x0000000007DFA000-memory.dmp

Filesize
6.5MB

Download
memory/3704-48-0x0000000007140000-0x000000000715A000-memory.dmp

Filesize
104KB

Download
memory/3704-49-0x00000000071A0000-0x00000000071AA000-memory.dmp

Filesize
40KB

Download
memory/3704-50-0x0000000007400000-0x0000000007496000-memory.dmp

Filesize
600KB

Download
memory/3704-51-0x0000000007320000-0x0000000007331000-memory.dmp

Filesize
68KB

Download
memory/3704-52-0x0000000007360000-0x000000000736E000-memory.dmp

Filesize
56KB

Download
memory/3704-53-0x0000000007370000-0x0000000007384000-memory.dmp

Filesize
80KB

Download
memory/3704-54-0x00000000073B0000-0x00000000073CA000-memory.dmp

Filesize
104KB

Download
memory/3704-55-0x00000000073A0000-0x00000000073A8000-memory.dmp

Filesize
32KB

Download
memory/3704-56-0x00000000074A0000-0x00000000074C2000-memory.dmp

Filesize
136KB

Download
memory/3704-59-0x0000000075030000-0x00000000757E1000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads