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 9 IoCs

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

rat infostealer dcrat

description	ioc	pid	Process
		860	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language		cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe
		2736	schtasks.exe
		1400	schtasks.exe
		696	schtasks.exe
		2852	schtasks.exe
		2908	schtasks.exe
		3012	schtasks.exe
		1484	schtasks.exe

Dcrat family
dcrat

Process spawned unexpected child process 8 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	2852	2664	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2908	2664	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3012	2664	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2736	2664	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1400	2664	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1484	2664	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	696	2664	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	860	2664	schtasks.exe	35

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0007000000016d49-9.dat	dcrat
behavioral1/memory/2744-13-0x0000000000F60000-0x00000000010C2000-memory.dmp	dcrat
behavioral1/memory/1236-37-0x0000000000FE0000-0x0000000001142000-memory.dmp	dcrat

Executes dropped EXE 3 IoCs

pid	Process
2744	Monitordhcphostperfdhcp.exe
2824	Monitordhcphostperfdhcp.exe
1236	dllhost.exe

Loads dropped DLL 2 IoCs

pid	Process
2056	cmd.exe
2056	cmd.exe

Adds Run key to start application 2 TTPs 8 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\lsm = "\"C:\\MSOCache\\All Users\\{90140000-001B-0409-0000-0000000FF1CE}-C\\lsm.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\Windows\\System32\\wbem\\WMIsvc\\WMIADAP.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Program Files (x86)\\Google\\CrashReports\\WmiPrvSE.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\PerfLogs\\Admin\\sppsvc.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\Windows\\System32\\wbem\\KrnlProv\\WMIADAP.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\conhost = "\"C:\\Windows\\System32\\provthrd\\conhost.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Monitordhcphostperfdhcp = "\"C:\\Monitordhcp\\WILvUYc\\Monitordhcphostperfdhcp.exe\""	Monitordhcphostperfdhcp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Monitordhcp\\WILvUYc\\dllhost.exe\""	Monitordhcphostperfdhcp.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
File created	C:\Windows\System32\wbem\KrnlProv\75a57c1bdf437c0c81ad56e81f43c7323ed35745	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\provthrd\conhost.exe	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\provthrd\088424020bedd6b28ac7fd22ee35dcd7322895ce	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\wbem\WMIsvc\WMIADAP.exe	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\wbem\WMIsvc\75a57c1bdf437c0c81ad56e81f43c7323ed35745	Monitordhcphostperfdhcp.exe
File created	C:\Windows\System32\wbem\KrnlProv\WMIADAP.exe	Monitordhcphostperfdhcp.exe
File opened for modification	C:\Windows\System32\wbem\KrnlProv\WMIADAP.exe	Monitordhcphostperfdhcp.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Google\CrashReports\WmiPrvSE.exe	Monitordhcphostperfdhcp.exe
File created	C:\Program Files (x86)\Google\CrashReports\24dbde2999530ef5fd907494bc374d663924116c	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

Scheduled Task/Job: Scheduled Task 1 TTPs 8 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
860	schtasks.exe
2852	schtasks.exe
2908	schtasks.exe
3012	schtasks.exe
2736	schtasks.exe
1400	schtasks.exe
1484	schtasks.exe
696	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2744	Monitordhcphostperfdhcp.exe
2744	Monitordhcphostperfdhcp.exe
2744	Monitordhcphostperfdhcp.exe
2824	Monitordhcphostperfdhcp.exe
1236	dllhost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2744	Monitordhcphostperfdhcp.exe
Token: SeDebugPrivilege	2824	Monitordhcphostperfdhcp.exe
Token: SeDebugPrivilege	1236	dllhost.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2480 wrote to memory of 2052	2480	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe	30
PID 2480 wrote to memory of 2052	2480	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe	30
PID 2480 wrote to memory of 2052	2480	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe	30
PID 2480 wrote to memory of 2052	2480	cd0474c2a3a8a662b9ec1cda81ef072e_JaffaCakes118.exe	30
PID 2052 wrote to memory of 2056	2052	WScript.exe	31
PID 2052 wrote to memory of 2056	2052	WScript.exe	31
PID 2052 wrote to memory of 2056	2052	WScript.exe	31
PID 2052 wrote to memory of 2056	2052	WScript.exe	31
PID 2056 wrote to memory of 2744	2056	cmd.exe	33
PID 2056 wrote to memory of 2744	2056	cmd.exe	33
PID 2056 wrote to memory of 2744	2056	cmd.exe	33
PID 2056 wrote to memory of 2744	2056	cmd.exe	33
PID 2744 wrote to memory of 2824	2744	Monitordhcphostperfdhcp.exe	39
PID 2744 wrote to memory of 2824	2744	Monitordhcphostperfdhcp.exe	39
PID 2744 wrote to memory of 2824	2744	Monitordhcphostperfdhcp.exe	39
PID 2824 wrote to memory of 1236	2824	Monitordhcphostperfdhcp.exe	45
PID 2824 wrote to memory of 1236	2824	Monitordhcphostperfdhcp.exe	45
PID 2824 wrote to memory of 1236	2824	Monitordhcphostperfdhcp.exe	45

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
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2480
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Monitordhcp\Xii1UKV1Nw42l78hpaWebp.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Monitordhcp\WILvUYc.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2056
  - - C:\Monitordhcp\Monitordhcphostperfdhcp.exe
      "C:\Monitordhcp\Monitordhcphostperfdhcp.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2744
    - - C:\Monitordhcp\Monitordhcphostperfdhcp.exe
        
        "C:\Monitordhcp\Monitordhcphostperfdhcp.exe"
        5⤵
        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:2824
      - C:\Monitordhcp\WILvUYc\dllhost.exe
        
        "C:\Monitordhcp\WILvUYc\dllhost.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Windows\System32\wbem\KrnlProv\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Windows\System32\provthrd\conhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Monitordhcphostperfdhcp" /sc ONLOGON /tr "'C:\Monitordhcp\WILvUYc\Monitordhcphostperfdhcp.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3012

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Monitordhcp\WILvUYc\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2736

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\lsm.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1400

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Windows\System32\wbem\WMIsvc\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\CrashReports\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:860

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\PerfLogs\Admin\sppsvc.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:696

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

1

T1012

System Information Discovery

1

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\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
\Monitordhcp\Monitordhcphostperfdhcp.exe

Filesize
1.4MB

MD5
bab98c6765f79dd78332ba9b92ad2630

SHA1
580ad3d2c8a509cf43ab389f1a44792f0dfdcd7c

SHA256
3e20d986b660e1018c9be00e17d85cc30b3c529f8735c0f4f4cc1703ceff2900

SHA512
59e35282900c1aca24923debaf0631fa4b13a909473d8a1bed96a3607ae7ee9300e5b29dbb413765745206eae3eb22927f7cf84d33230b366ceaa0eeee9221e0

Download Submit
memory/1236-37-0x0000000000FE0000-0x0000000001142000-memory.dmp

Filesize
1.4MB

Download
memory/2744-13-0x0000000000F60000-0x00000000010C2000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads