quasar | e32128f875d42818741d274d447aacf2cdc15cc78a2ce0a393d629c4c90c779d

General

Target

full.exe
Size

16.5MB
MD5

b59ee68c7c3ee01e14a7516628368046
SHA1

7a0cc3f080d1c2143e770d1fd50dc7f20bef9f7a
SHA256

e32128f875d42818741d274d447aacf2cdc15cc78a2ce0a393d629c4c90c779d
SHA512

3bfeb88f787da0784e3615d9b048589cfdc3492dcb24b8a508f6fb2d6170049b86049f0942e19041b5d262cde3479d338aa5fd6ce654c6a02b6b78590c738c6b
SSDEEP

196608:NKuXJJx9MbelAUHXTuj4KxT931ugenDTYe6cZK3F:cuXXx91WgDKd93renDTYz2K

Score

10^/10

quasar office04 discovery execution persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

1.tcp.sa.ngrok.io:20545

Mutex

a888ff96-3c09-47a6-9d99-754a5cdfdb56

Attributes

encryption_key
4CD7E5DD87FFEF73A08F084E887E8F136321F5D7
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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
behavioral2/memory/3892-16-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AdobePS1\ = "powershell -ExecutionPolicy Bypass -File \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Adobe.ps1\""	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
18	1.tcp.sa.ngrok.io

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2904 set thread context of 3892	2904	powershell.exe	86

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2904	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	InstallUtil.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2448	reg.exe

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 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	full.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C	full.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 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	full.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4636	full.exe
4636	full.exe
4636	full.exe
4636	full.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	powershell.exe
Token: SeDebugPrivilege	3892	InstallUtil.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4636 wrote to memory of 2448	4636	full.exe	84
PID 4636 wrote to memory of 2448	4636	full.exe	84
PID 4636 wrote to memory of 2904	4636	full.exe	85
PID 4636 wrote to memory of 2904	4636	full.exe	85
PID 2904 wrote to memory of 3892	2904	powershell.exe	86
PID 2904 wrote to memory of 3892	2904	powershell.exe	86
PID 2904 wrote to memory of 3892	2904	powershell.exe	86
PID 2904 wrote to memory of 3892	2904	powershell.exe	86
PID 2904 wrote to memory of 3892	2904	powershell.exe	86
PID 2904 wrote to memory of 3892	2904	powershell.exe	86
PID 2904 wrote to memory of 3892	2904	powershell.exe	86
PID 2904 wrote to memory of 3892	2904	powershell.exe	86

C:\Users\Admin\AppData\Local\Temp\full.exe
"C:\Users\Admin\AppData\Local\Temp\full.exe"
1⤵
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4636
- C:\Windows\system32\reg.exe
  reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run\AdobePS1 /t REG_SZ /d "powershell -ExecutionPolicy Bypass -File \"C:\Users\Admin\AppData\Local\Temp\Adobe.ps1\"" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:2448
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -ExecutionPolicy Bypass -File C:\Users\Admin\AppData\Local\Temp\Adobe.ps1
  2⤵
  - Suspicious use of SetThreadContext
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2904
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

3

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Adobe.ps1

Filesize
10.6MB

MD5
90a005927b1d759d4dd93e4721a93585

SHA1
30c42c6bcccc8ce4efd56ae8d7a88bf15023e60b

SHA256
590f970e72e38b034eccb2839f763954258d6bf237aa087f31ff4f3951e07d15

SHA512
cc9f478e9111d5a9b55041a9689232de2f3f6c7299eece438aef3cbd3d5d62441cf658f3e36c7401bf21b60f8670f03a695ef5a08b6d6945fe4bcb38a6be4aea

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_klkz1mc2.lwx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2904-19-0x00007FF9878F0000-0x00007FF9883B1000-memory.dmp

Filesize
10.8MB

Download
memory/2904-2-0x000001A4379E0000-0x000001A437A02000-memory.dmp

Filesize
136KB

Download
memory/2904-13-0x00007FF9878F0000-0x00007FF9883B1000-memory.dmp

Filesize
10.8MB

Download
memory/2904-14-0x00007FF9878F0000-0x00007FF9883B1000-memory.dmp

Filesize
10.8MB

Download
memory/2904-15-0x000001A452070000-0x000001A452080000-memory.dmp

Filesize
64KB

Download
memory/2904-1-0x00007FF9878F3000-0x00007FF9878F5000-memory.dmp

Filesize
8KB

Download
memory/3892-21-0x0000000005EE0000-0x0000000006484000-memory.dmp

Filesize
5.6MB

Download
memory/3892-26-0x0000000005DB0000-0x0000000005E00000-memory.dmp

Filesize
320KB

Download
memory/3892-16-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3892-22-0x0000000005930000-0x00000000059C2000-memory.dmp

Filesize
584KB

Download
memory/3892-23-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/3892-24-0x00000000058C0000-0x00000000058CA000-memory.dmp

Filesize
40KB

Download
memory/3892-25-0x0000000006AB0000-0x00000000070C8000-memory.dmp

Filesize
6.1MB

Download
memory/3892-20-0x000000007531E000-0x000000007531F000-memory.dmp

Filesize
4KB

Download
memory/3892-27-0x00000000065D0000-0x0000000006682000-memory.dmp

Filesize
712KB

Download
memory/3892-30-0x00000000078D0000-0x00000000078E2000-memory.dmp

Filesize
72KB

Download
memory/3892-31-0x0000000007930000-0x000000000796C000-memory.dmp

Filesize
240KB

Download
memory/3892-32-0x00000000079E0000-0x0000000007A46000-memory.dmp

Filesize
408KB

Download
memory/3892-33-0x000000007531E000-0x000000007531F000-memory.dmp

Filesize
4KB

Download
memory/3892-34-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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