fb97d6ec1b1de59c4f02b55c8f95e756a13f9119f4bd08e77e832890ae529317

General

Target

Koa_Paid_Tweak_Tool.bat
Size

87KB
MD5

2523b7ade7ef2ab0364cf7af2480780b
SHA1

f0a796bbe87cbedb2422f1a30ed679910b16eec8
SHA256

fb97d6ec1b1de59c4f02b55c8f95e756a13f9119f4bd08e77e832890ae529317
SHA512

3cef3cd7f42f3950ae5d683762747cbc8fbbeba37d8e761e2dffb6ac2469db992023407ed8dd62f2f4bcdc3be91c3de03b8af834a93e423651f1c3548cd9fe3a
SSDEEP

384:0jW4urpgB0TBp1uFuyIBmGlngbuPPqoeV9WIblw8WGDyLNZfKGDyLNZfU9a1QL:n80TBWQyEjPqoC9yiU0QL

Score

10^/10

evasion execution trojan

Malware Config

Signatures

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3280	powershell.exe
4988	powershell.exe

Checks SCSI registry key(s) 3 TTPs 5 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\PartitionTableCache = 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	vssvc.exe
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\SnapshotDataCache = 534e41505041525401000000700000008ec7416a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	vssvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters	vssvc.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr	vssvc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3280	powershell.exe
3280	powershell.exe
4988	powershell.exe
4988	powershell.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeDebugPrivilege	3280	powershell.exe
Token: SeDebugPrivilege	4988	powershell.exe
Token: SeBackupPrivilege	4812	vssvc.exe
Token: SeRestorePrivilege	4812	vssvc.exe
Token: SeAuditPrivilege	4812	vssvc.exe
Token: SeBackupPrivilege	4992	srtasks.exe
Token: SeRestorePrivilege	4992	srtasks.exe
Token: SeSecurityPrivilege	4992	srtasks.exe
Token: SeTakeOwnershipPrivilege	4992	srtasks.exe
Token: SeBackupPrivilege	4992	srtasks.exe
Token: SeRestorePrivilege	4992	srtasks.exe
Token: SeSecurityPrivilege	4992	srtasks.exe
Token: SeTakeOwnershipPrivilege	4992	srtasks.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3600 wrote to memory of 2852	3600	cmd.exe	84
PID 3600 wrote to memory of 2852	3600	cmd.exe	84
PID 3600 wrote to memory of 388	3600	cmd.exe	85
PID 3600 wrote to memory of 388	3600	cmd.exe	85
PID 3600 wrote to memory of 3028	3600	cmd.exe	86
PID 3600 wrote to memory of 3028	3600	cmd.exe	86
PID 3600 wrote to memory of 3092	3600	cmd.exe	87
PID 3600 wrote to memory of 3092	3600	cmd.exe	87
PID 3600 wrote to memory of 1464	3600	cmd.exe	88
PID 3600 wrote to memory of 1464	3600	cmd.exe	88
PID 3600 wrote to memory of 3280	3600	cmd.exe	89
PID 3600 wrote to memory of 3280	3600	cmd.exe	89
PID 3600 wrote to memory of 4988	3600	cmd.exe	95
PID 3600 wrote to memory of 4988	3600	cmd.exe	95
PID 3600 wrote to memory of 4540	3600	cmd.exe	102
PID 3600 wrote to memory of 4540	3600	cmd.exe	102
PID 3600 wrote to memory of 4436	3600	cmd.exe	103
PID 3600 wrote to memory of 4436	3600	cmd.exe	103

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Koa_Paid_Tweak_Tool.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3600
- C:\Windows\system32\reg.exe
  Reg.exe ADD "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v "EnableLUA" /t REG_DWORD /d "0" /f
  2⤵
  - UAC bypass
  PID:2852
- C:\Windows\system32\reg.exe
  Reg.exe add "HKCU\CONSOLE" /v "VirtualTerminalLevel" /t REG_DWORD /d "1" /f
  2⤵
  PID:388
- C:\Windows\system32\reg.exe
  Reg.exe delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\SystemRestore" /v "RPSessionInterval" /f
  2⤵
  PID:3028
- C:\Windows\system32\reg.exe
  Reg.exe delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\SystemRestore" /v "DisableConfig" /f
  2⤵
  PID:3092
- C:\Windows\system32\reg.exe
  Reg.exe add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "SystemRestorePointCreationFrequency" /t REG_DWORD /d 0 /f
  2⤵
  PID:1464
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -ExecutionPolicy Unrestricted -NoProfile Enable-ComputerRestore -Drive 'C:\'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3280
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -ExecutionPolicy Bypass -Command "Checkpoint-Computer -Description 'KoaPaid' -RestorePointType 'MODIFY_SETTINGS'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4988
- C:\Windows\system32\chcp.com
  chcp 65001
  2⤵
  PID:4540
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c "prompt #$H#$E# & echo on & for %b in (1) do rem"
  2⤵
  PID:4436

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Checks SCSI registry key(s)
- Suspicious use of AdjustPrivilegeToken
PID:4812

C:\Windows\system32\srtasks.exe
C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
6cf293cb4d80be23433eecf74ddb5503

SHA1
24fe4752df102c2ef492954d6b046cb5512ad408

SHA256
b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

SHA512
0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

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

Filesize
64B

MD5
d8b9a260789a22d72263ef3bb119108c

SHA1
376a9bd48726f422679f2cd65003442c0b6f6dd5

SHA256
d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

SHA512
550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_e4y0ywzv.bot.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3280-0-0x00007FFD8B0B3000-0x00007FFD8B0B5000-memory.dmp

Filesize
8KB

Download
memory/3280-6-0x000001CCC0DB0000-0x000001CCC0DD2000-memory.dmp

Filesize
136KB

Download
memory/3280-11-0x00007FFD8B0B0000-0x00007FFD8BB71000-memory.dmp

Filesize
10.8MB

Download
memory/3280-12-0x00007FFD8B0B0000-0x00007FFD8BB71000-memory.dmp

Filesize
10.8MB

Download
memory/3280-15-0x00007FFD8B0B0000-0x00007FFD8BB71000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads