dcrat | 6fa4e7b5a0f66ca0eb75634dbcc3a75a33e126d4f62fd76285a016d5df61b785

General

Target

cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe
Size

1.7MB
MD5

cd0474c2a3a8a662b9ec1cda81ef072e
SHA1

e1bc9504cbf0f6b96ba50f5a14b34d4f9466480d
SHA256

6fa4e7b5a0f66ca0eb75634dbcc3a75a33e126d4f62fd76285a016d5df61b785
SHA512

fc8d7fa6216f85924f5eaa7252c3bb720bab4d48d86a11f10d236190debd3b2f773188039250d378b1ab6c32ac4f053fba6b3a632ef6ef26d3345b1cd4055215
SSDEEP

24576:u2G/nvxW3WieCIjEHTG4BWus6NpkRqqdY/kxqlQOczM9xDEw5PWGBcXkaH+kO+49:ubA3jI2BWuzpkRLOsGEwRnB8k4hJ2

Score

10^/10

dcrat discovery infostealer persistence rat

Malware Config

Signatures

DcRat 8 IoCs

DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

rat infostealer dcrat

description	ioc	pid	Process
		1724	schtasks.exe
		184	schtasks.exe
		4108	schtasks.exe
		2512	schtasks.exe
		4980	schtasks.exe
		5032	schtasks.exe
		1680	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language		cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe

Dcrat family
dcrat

Process spawned unexpected child process 7 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	1724	928	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	184	928	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4108	928	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2512	928	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4980	928	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5032	928	schtasks.exe	86
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1680	928	schtasks.exe	86

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x0007000000023c88-10.dat	dcrat
behavioral2/memory/224-13-0x00000000006E0000-0x0000000000842000-memory.dmp	dcrat

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	Monitordhcphostperfdhcp.exe

Executes dropped EXE 2 IoCs

pid	Process
224	Monitordhcphostperfdhcp.exe
816	services.exe

Adds Run key to start application 2 TTPs 7 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\lsass = "\"C:\\Windows\\System32\\MTFAppServiceDS\\lsass.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sihost = "\"C:\\Windows\\System32\\SettingsHandlers_BrowserDeclutter\\sihost.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\pnputil\\RuntimeBroker.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Monitordhcp\\lsass.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Users\\Default\\My Documents\\dwm.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Program Files (x86)\\Windows Sidebar\\Shared Gadgets\\services.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\setbcdlocale\\lsass.exe\""	Monitordhcphostperfdhcp.exe

Drops file in System32 directory 9 IoCs

description	ioc	Process
File created	C:\Windows\System32\MTFAppServiceDS\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\SettingsHandlers_BrowserDeclutter\sihost.exe	Monitordhcphostperfdhcp.exe
File opened for modification	C:\Windows\System32\pnputil\RuntimeBroker.exe	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\setbcdlocale\lsass.exe	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\setbcdlocale\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\SettingsHandlers_BrowserDeclutter\66fc9ff0ee96c2b21f0cfded48750ae9e3032bf3	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\pnputil\RuntimeBroker.exe	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\pnputil\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\MTFAppServiceDS\lsass.exe	Monitordhcphostperfdhcp.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	Monitordhcphostperfdhcp.exe
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\services.exe	Monitordhcphostperfdhcp.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000_Classes\Local Settings	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1724	schtasks.exe
184	schtasks.exe
4108	schtasks.exe
2512	schtasks.exe
4980	schtasks.exe
5032	schtasks.exe
1680	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
224	Monitordhcphostperfdhcp.exe
224	Monitordhcphostperfdhcp.exe
224	Monitordhcphostperfdhcp.exe
224	Monitordhcphostperfdhcp.exe
224	Monitordhcphostperfdhcp.exe
816	services.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	224	Monitordhcphostperfdhcp.exe
Token: SeDebugPrivilege	816	services.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4216 wrote to memory of 2024	4216	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe	82
PID 4216 wrote to memory of 2024	4216	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe	82
PID 4216 wrote to memory of 2024	4216	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe	82
PID 2024 wrote to memory of 4952	2024	WScript.exe	87
PID 2024 wrote to memory of 4952	2024	WScript.exe	87
PID 2024 wrote to memory of 4952	2024	WScript.exe	87
PID 4952 wrote to memory of 224	4952	cmd.exe	89
PID 4952 wrote to memory of 224	4952	cmd.exe	89
PID 224 wrote to memory of 816	224	Monitordhcphostperfdhcp.exe	97
PID 224 wrote to memory of 816	224	Monitordhcphostperfdhcp.exe	97

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\cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe"
1⤵
- DcRat
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4216
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Monitordhcp\Xii1UKV1Nw42l78hpaWebp.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2024
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Monitordhcp\WILvUYc.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4952
  - - C:\Monitordhcp\Monitordhcphostperfdhcp.exe
      "C:\Monitordhcp\Monitordhcphostperfdhcp.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:224
    - - C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\services.exe
        
        "C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\services.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\pnputil\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1724

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Monitordhcp\lsass.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:184

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\Default\My Documents\dwm.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\services.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2512

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\setbcdlocale\lsass.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\MTFAppServiceDS\lsass.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\System32\SettingsHandlers_BrowserDeclutter\sihost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Monitordhcp\Monitordhcphostperfdhcp.exe

Filesize
1.4MB

MD5
bab98c6765f79dd78332ba9b92ad2630

SHA1
580ad3d2c8a509cf43ab389f1a44792f0dfdcd7c

SHA256
3e20d986b660e1018c9be00e17d85cc30b3c529f8735c0f4f4cc1703ceff2900

SHA512
59e35282900c1aca24923debaf0631fa4b13a909473d8a1bed96a3607ae7ee9300e5b29dbb413765745206eae3eb22927f7cf84d33230b366ceaa0eeee9221e0

Download Submit
C:\Monitordhcp\WILvUYc.bat

Filesize
44B

MD5
c5838fd73ba1243779f5a195b5e74ff5

SHA1
51e2f59f37443bab38b199a00e7b1f2e78dea634

SHA256
df18d41718439a01b6c48ea662f62f941c846a1b48b8913c56182f0aab406f14

SHA512
fbe20cfd402051725e583f2406f5a4ed498f1f7cf3a757f1cc91ec6b2aa23e9ff40e36b6d25ad0ec2c8ed3e575d8b55c8c387fa7fd2fb0caea0c64f0ee227e6c

Download Submit
C:\Monitordhcp\Xii1UKV1Nw42l78hpaWebp.vbe

Filesize
195B

MD5
f22aec4e46c427cce063968c286274ad

SHA1
4d66c5413b6961efb244d720b44d6f3810554032

SHA256
385d7fef54298f6819f6fc80b1f98da3a11ddf8db6c354e3c949e05853abe56b

SHA512
ecaa1801a079db791e9b70d700ff095438ed3a76a597da6577d91ff6f0347291d2a76276ba86b74e77a51e34e59b56dbcbdf67c1370d0c35324c17d3bf88eebf

Download Submit
memory/224-12-0x00007FFEBC563000-0x00007FFEBC565000-memory.dmp

Filesize
8KB

Download
memory/224-13-0x00000000006E0000-0x0000000000842000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads