dcrat | 4415d417dd1b3ccd3c86fa55cf3add99e493218cb0c1405efaf8e55ac7b5c666

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\", \"C:\\Windows\\debug\\fontdrvhost.exe\", \"C:\\Windows\\Panther\\InstallAgent.exe\", \"C:\\Windows\\Provisioning\\Cosa\\sppsvc.exe\", \"C:\\ChainSurrogateref\\taskhostw.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\", \"C:\\Windows\\debug\\fontdrvhost.exe\", \"C:\\Windows\\Panther\\InstallAgent.exe\", \"C:\\Windows\\Provisioning\\Cosa\\sppsvc.exe\", \"C:\\ChainSurrogateref\\taskhostw.exe\", \"C:\\Program Files (x86)\\Windows Portable Devices\\dllhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\", \"C:\\Windows\\debug\\fontdrvhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\", \"C:\\Windows\\debug\\fontdrvhost.exe\", \"C:\\Windows\\Panther\\InstallAgent.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\", \"C:\\Windows\\debug\\fontdrvhost.exe\", \"C:\\Windows\\Panther\\InstallAgent.exe\", \"C:\\Windows\\Provisioning\\Cosa\\sppsvc.exe\""	hyperBrowser.exe

Process spawned unexpected child process 18 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4660	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3392	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4532	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1268	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2776	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	596	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4424	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1344	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3908	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2308	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3988	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3032	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2768	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4772	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2516	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4008	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5076	4016	schtasks.exe	76
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1088	4016	schtasks.exe	76

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000800000001ac23-12.dat	dcrat
behavioral1/memory/428-14-0x0000000000B30000-0x0000000000DC2000-memory.dmp	dcrat

Disables Task Manager via registry modification
evasion

Executes dropped EXE 2 IoCs

pid	Process
428	hyperBrowser.exe
4816	fontdrvhost.exe

Adds Run key to start application 2 TTPs 12 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Windows\\debug\\fontdrvhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\InstallAgent = "\"C:\\Windows\\Panther\\InstallAgent.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Program Files (x86)\\Windows Multimedia Platform\\dllhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Windows\\debug\\fontdrvhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\InstallAgent = "\"C:\\Windows\\Panther\\InstallAgent.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Windows\\Provisioning\\Cosa\\sppsvc.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Windows\\Provisioning\\Cosa\\sppsvc.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\ChainSurrogateref\\taskhostw.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\ChainSurrogateref\\taskhostw.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Program Files (x86)\\Windows Portable Devices\\dllhost.exe\""	hyperBrowser.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Program Files (x86)\\Windows Portable Devices\\dllhost.exe\""	hyperBrowser.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
2	pastebin.com
3	pastebin.com

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
10	ipinfo.io
11	ipinfo.io

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Multimedia Platform\dllhost.exe	hyperBrowser.exe
File opened for modification	C:\Program Files (x86)\Windows Multimedia Platform\dllhost.exe	hyperBrowser.exe
File created	C:\Program Files (x86)\Windows Multimedia Platform\5940a34987c991	hyperBrowser.exe
File created	C:\Program Files (x86)\Windows Portable Devices\dllhost.exe	hyperBrowser.exe
File created	C:\Program Files (x86)\Windows Portable Devices\5940a34987c991	hyperBrowser.exe

Drops file in Windows directory 8 IoCs

description	ioc	Process
File created	C:\Windows\Panther\200f98429d280b	hyperBrowser.exe
File created	C:\Windows\Provisioning\Cosa\sppsvc.exe	hyperBrowser.exe
File created	C:\Windows\Provisioning\Cosa\0a1fd5f707cd16	hyperBrowser.exe
File created	C:\Windows\diagnostics\index\cmd.exe	hyperBrowser.exe
File created	C:\Windows\Speech\Engines\Lexicon\en-US\cmd.exe	hyperBrowser.exe
File created	C:\Windows\debug\fontdrvhost.exe	hyperBrowser.exe
File created	C:\Windows\debug\5b884080fd4f94	hyperBrowser.exe
File created	C:\Windows\Panther\InstallAgent.exe	hyperBrowser.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000_Classes\Local Settings	Cs2SteamEmul.exe
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000_Classes\Local Settings	hyperBrowser.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

pid	Process
1212	reg.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
596	schtasks.exe
2776	schtasks.exe
3908	schtasks.exe
4772	schtasks.exe
5076	schtasks.exe
1088	schtasks.exe
4660	schtasks.exe
3392	schtasks.exe
4424	schtasks.exe
2308	schtasks.exe
4008	schtasks.exe
2768	schtasks.exe
2516	schtasks.exe
4532	schtasks.exe
1268	schtasks.exe
1344	schtasks.exe
3988	schtasks.exe
3032	schtasks.exe

Suspicious behavior: EnumeratesProcesses 37 IoCs

pid	Process
428	hyperBrowser.exe
428	hyperBrowser.exe
428	hyperBrowser.exe
428	hyperBrowser.exe
428	hyperBrowser.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe
4816	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	428	hyperBrowser.exe
Token: SeDebugPrivilege	4816	fontdrvhost.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3912 wrote to memory of 4196	3912	Cs2SteamEmul.exe	72
PID 3912 wrote to memory of 4196	3912	Cs2SteamEmul.exe	72
PID 3912 wrote to memory of 4196	3912	Cs2SteamEmul.exe	72
PID 4196 wrote to memory of 2008	4196	WScript.exe	73
PID 4196 wrote to memory of 2008	4196	WScript.exe	73
PID 4196 wrote to memory of 2008	4196	WScript.exe	73
PID 2008 wrote to memory of 428	2008	cmd.exe	75
PID 2008 wrote to memory of 428	2008	cmd.exe	75
PID 428 wrote to memory of 4876	428	hyperBrowser.exe	95
PID 428 wrote to memory of 4876	428	hyperBrowser.exe	95
PID 2008 wrote to memory of 1212	2008	cmd.exe	97
PID 2008 wrote to memory of 1212	2008	cmd.exe	97
PID 2008 wrote to memory of 1212	2008	cmd.exe	97
PID 4876 wrote to memory of 4208	4876	cmd.exe	98
PID 4876 wrote to memory of 4208	4876	cmd.exe	98
PID 4876 wrote to memory of 4816	4876	cmd.exe	99
PID 4876 wrote to memory of 4816	4876	cmd.exe	99

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Cs2SteamEmul.exe
"C:\Users\Admin\AppData\Local\Temp\Cs2SteamEmul.exe"
1⤵
- DcRat
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3912
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ChainSurrogateref\s70leb7kkd32CLdRUKa.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4196
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\ChainSurrogateref\xpD7eJ.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2008
  - - C:\ChainSurrogateref\hyperBrowser.exe
      "C:\ChainSurrogateref\hyperBrowser.exe"
      4⤵
      DcRat
      Modifies WinLogon for persistence
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Program Files directory
      Drops file in Windows directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:428
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\bCLjvGEUzj.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4876
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:4208
      - C:\Windows\debug\fontdrvhost.exe
        
        "C:\Windows\debug\fontdrvhost.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4816
  - - C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
      4⤵
      Modifies registry key
      PID:1212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\dllhost.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Multimedia Platform\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3392

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Multimedia Platform\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 8 /tr "'C:\Windows\debug\fontdrvhost.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1268

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\debug\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2776

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Windows\debug\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgentI" /sc MINUTE /mo 7 /tr "'C:\Windows\Panther\InstallAgent.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4424

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgent" /sc ONLOGON /tr "'C:\Windows\Panther\InstallAgent.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1344

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "InstallAgentI" /sc MINUTE /mo 14 /tr "'C:\Windows\Panther\InstallAgent.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 5 /tr "'C:\Windows\Provisioning\Cosa\sppsvc.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\Provisioning\Cosa\sppsvc.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 10 /tr "'C:\Windows\Provisioning\Cosa\sppsvc.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 13 /tr "'C:\ChainSurrogateref\taskhostw.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\ChainSurrogateref\taskhostw.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4772

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 8 /tr "'C:\ChainSurrogateref\taskhostw.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Portable Devices\dllhost.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4008

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5076

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Portable Devices\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1088

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Modify Registry

3

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service