19e5abfc57e4969d264f332ccfd5d3f66fd288169e96acf40b6268f8e224ba77

General

Target

ka.exe
Size

1.3MB
MD5

2e0827867a5d6d443f13b5734bb34f25
SHA1

abc9c26b88bf37571dcb342a89d6c185dab72062
SHA256

19e5abfc57e4969d264f332ccfd5d3f66fd288169e96acf40b6268f8e224ba77
SHA512

0d07a3ad39f143688d032088b970c199cf8015622c75290191c2370c5721204d545ac214cca56d2cf532e61f2550d15606cd389e0457e7480866f4df6f320967
SSDEEP

24576:WXT4A/dXgFI65Ux5PYgMBLVYyLJDI8kz5/gtY6v/87xaVUhffpE0vwYBb:WXMA1XgF06gGLVYuJDI8kz5YtY6WhfW6

Score

8^/10

defense_evasion execution persistence

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4728	powershell.exe
884	powershell.exe
2172	powershell.exe
4048	powershell.exe
3348	powershell.exe

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	ka.exe

Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WsHosts = "C:\\Windows\\WindowsUpdate\\wshosts.exe"	ka.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\WindowsUpdate\wshosts.exe	ka.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1772	sc.exe
4288	sc.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4728	powershell.exe
884	powershell.exe
4728	powershell.exe
2172	powershell.exe
4048	powershell.exe
3348	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4728	powershell.exe
Token: SeDebugPrivilege	884	powershell.exe
Token: SeDebugPrivilege	2172	powershell.exe
Token: SeDebugPrivilege	4048	powershell.exe
Token: SeDebugPrivilege	3348	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1208 wrote to memory of 4728	1208	ka.exe	80
PID 1208 wrote to memory of 4728	1208	ka.exe	80
PID 1208 wrote to memory of 4288	1208	ka.exe	81
PID 1208 wrote to memory of 4288	1208	ka.exe	81
PID 1208 wrote to memory of 884	1208	ka.exe	82
PID 1208 wrote to memory of 884	1208	ka.exe	82
PID 1208 wrote to memory of 2172	1208	ka.exe	83
PID 1208 wrote to memory of 2172	1208	ka.exe	83
PID 1208 wrote to memory of 4048	1208	ka.exe	84
PID 1208 wrote to memory of 4048	1208	ka.exe	84
PID 1208 wrote to memory of 3348	1208	ka.exe	85
PID 1208 wrote to memory of 3348	1208	ka.exe	85
PID 1208 wrote to memory of 1772	1208	ka.exe	86
PID 1208 wrote to memory of 1772	1208	ka.exe	86

C:\Users\Admin\AppData\Local\Temp\ka.exe
"C:\Users\Admin\AppData\Local\Temp\ka.exe"
1⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" "-WindowStyle Hidden -ExecutionPolicy Bypass -File \"C:\Windows\WindowsUpdate\457393\st.ps1\""
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4728
- C:\Windows\system32\sc.exe
  "sc" create WsHosts "binPath= \"C:\Users\Admin\AppData\Local\Temp\ka.exe\"" "start= auto"
  2⤵
  - Launches sc.exe
  PID:4288
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\temp.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:884
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -ExecutionPolicy Bypass -File C:\Windows\System32\svhosts.ps1
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2172
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -ExecutionPolicy Bypass -File C:\Windows\System32\WindowsUpdate.ps1
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4048
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -ExecutionPolicy Bypass -File C:\Windows\System32\wins32bugfix.ps1
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3348
- C:\Windows\system32\sc.exe
  "sc" delete WsHosts
  2⤵
  - Launches sc.exe
  PID:1772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

System Services

2

T1569

Service Execution

2

T1569.002

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

1

T1489

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Downloads

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

Filesize
1KB

MD5
44faae4726bb5767a56e4dbc17d20d33

SHA1
1c0c60ad36d484aaf491c61ec0f34f1a5166f056

SHA256
14329720e736138d8e1c8a0b7dfe17e28e884a6d027c497824d21c670f020ac6

SHA512
116cf0a7e48a0be64748f54f21b91d6f48c93f05802fabc90f123ca6f00b1a8bd71cefeb668abf031ca90233c8b3abd8e82a1b49a6b98adbb6ed9d63002cb32a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
446dd1cf97eaba21cf14d03aebc79f27

SHA1
36e4cc7367e0c7b40f4a8ace272941ea46373799

SHA256
a7de5177c68a64bd48b36d49e2853799f4ebcfa8e4761f7cc472f333dc5f65cf

SHA512
a6d754709f30b122112ae30e5ab22486393c5021d33da4d1304c061863d2e1e79e8aeb029cae61261bb77d0e7becd53a7b0106d6ea4368b4c302464e3d941cf7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zfefzua1.co0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1208-80-0x00007FF72EE70000-0x00007FF72EF66000-memory.dmp

Filesize
984KB

Download
memory/4728-6-0x00007FF918A23000-0x00007FF918A25000-memory.dmp

Filesize
8KB

Download
memory/4728-16-0x0000020A7B200000-0x0000020A7B222000-memory.dmp

Filesize
136KB

Download
memory/4728-31-0x00007FF918A20000-0x00007FF9194E2000-memory.dmp

Filesize
10.8MB

Download
memory/4728-32-0x00007FF918A20000-0x00007FF9194E2000-memory.dmp

Filesize
10.8MB

Download
memory/4728-33-0x00007FF918A20000-0x00007FF9194E2000-memory.dmp

Filesize
10.8MB

Download
memory/4728-34-0x00007FF918A20000-0x00007FF9194E2000-memory.dmp

Filesize
10.8MB

Download
memory/4728-37-0x00007FF918A20000-0x00007FF9194E2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads