dcrat | e0b451a5258bdacc66d22f0e7b45b67cb35a5bb7acab07aac122bd472e5a0827

General

Target

JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe
Size

1.2MB
MD5

3381479bab1dcacfbb8a7e4a4537f5f9
SHA1

771087a449813a1ab214aec8447122d28d772bfd
SHA256

e0b451a5258bdacc66d22f0e7b45b67cb35a5bb7acab07aac122bd472e5a0827
SHA512

a062dc024ba2effa2373790775f103cc8a14662ce444280b631656c816832f4e173f4e943c1efa0e8f39a0e66c77a2ccfe47df25970944bba47610f02932af73
SSDEEP

24576:s2G/nvxW3WvpSbNLEJxpseQihFqfmVPOBBD+4L:sbA3WM9MxBTZ3m

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
		1372	schtasks.exe
		2864	schtasks.exe
		1648	schtasks.exe
		2736	schtasks.exe
		2980	schtasks.exe
		576	schtasks.exe
		1288	schtasks.exe
		1396	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language		JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.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	576	2844	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2980	2844	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1372	2844	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2864	2844	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1648	2844	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2736	2844	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1288	2844	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1396	2844	schtasks.exe	34

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0008000000016c66-9.dat	dcrat
behavioral1/memory/2784-13-0x0000000000CB0000-0x0000000000D9C000-memory.dmp	dcrat
behavioral1/memory/816-36-0x0000000000D40000-0x0000000000E2C000-memory.dmp	dcrat

Executes dropped EXE 2 IoCs

pid	Process
2784	FontwinintoRefdllNet.exe
816	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
2096	cmd.exe
2096	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\winlogon = "\"C:\\Windows\\System32\\mf\\winlogon.exe\""	FontwinintoRefdllNet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\pcadm\\spoolsv.exe\""	FontwinintoRefdllNet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Program Files\\Common Files\\Microsoft Shared\\Stationery\\csrss.exe\""	FontwinintoRefdllNet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\Logs\\DISM\\wininit.exe\""	FontwinintoRefdllNet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\wow64win\\winlogon.exe\""	FontwinintoRefdllNet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\wship6\\lsm.exe\""	FontwinintoRefdllNet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\mfc110cht\\lsm.exe\""	FontwinintoRefdllNet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Program Files\\Common Files\\Microsoft Shared\\OfficeSoftwareProtectionPlatform\\OSPPOBJS\\OSPPSVC.exe\""	FontwinintoRefdllNet.exe

Drops file in System32 directory 10 IoCs

description	ioc	Process
File created	C:\Windows\System32\pcadm\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\wow64win\cc11b995f2a76da408ea6a601e682e64743153ad	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\wship6\101b941d020240259ca4912829b53995ad543df6	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\mfc110cht\lsm.exe	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\mf\winlogon.exe	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\pcadm\spoolsv.exe	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\wow64win\winlogon.exe	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\wship6\lsm.exe	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\mfc110cht\101b941d020240259ca4912829b53995ad543df6	FontwinintoRefdllNet.exe
File created	C:\Windows\System32\mf\cc11b995f2a76da408ea6a601e682e64743153ad	FontwinintoRefdllNet.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\Microsoft Shared\Stationery\csrss.exe	FontwinintoRefdllNet.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\csrss.exe	FontwinintoRefdllNet.exe
File created	C:\Program Files\Common Files\Microsoft Shared\Stationery\886983d96e3d3e31032c679b2d4ea91b6c05afef	FontwinintoRefdllNet.exe
File created	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\OSPPSVC.exe	FontwinintoRefdllNet.exe
File created	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\1610b97d3ab4a74cd8ae104b51bea7bfcc5b9c6f	FontwinintoRefdllNet.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Logs\DISM\wininit.exe	FontwinintoRefdllNet.exe
File created	C:\Windows\Logs\DISM\560854153607923c4c5f107085a7db67be01f252	FontwinintoRefdllNet.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	JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2736	schtasks.exe
1288	schtasks.exe
1396	schtasks.exe
576	schtasks.exe
2980	schtasks.exe
1372	schtasks.exe
2864	schtasks.exe
1648	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2784	FontwinintoRefdllNet.exe
2784	FontwinintoRefdllNet.exe
2784	FontwinintoRefdllNet.exe
2784	FontwinintoRefdllNet.exe
2784	FontwinintoRefdllNet.exe
816	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	FontwinintoRefdllNet.exe
Token: SeDebugPrivilege	816	csrss.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 1904	1720	JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe	30
PID 1720 wrote to memory of 1904	1720	JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe	30
PID 1720 wrote to memory of 1904	1720	JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe	30
PID 1720 wrote to memory of 1904	1720	JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe	30
PID 1904 wrote to memory of 2096	1904	WScript.exe	31
PID 1904 wrote to memory of 2096	1904	WScript.exe	31
PID 1904 wrote to memory of 2096	1904	WScript.exe	31
PID 1904 wrote to memory of 2096	1904	WScript.exe	31
PID 2096 wrote to memory of 2784	2096	cmd.exe	33
PID 2096 wrote to memory of 2784	2096	cmd.exe	33
PID 2096 wrote to memory of 2784	2096	cmd.exe	33
PID 2096 wrote to memory of 2784	2096	cmd.exe	33
PID 2784 wrote to memory of 816	2784	FontwinintoRefdllNet.exe	43
PID 2784 wrote to memory of 816	2784	FontwinintoRefdllNet.exe	43
PID 2784 wrote to memory of 816	2784	FontwinintoRefdllNet.exe	43

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\JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3381479bab1dcacfbb8a7e4a4537f5f9.exe"
1⤵
- DcRat
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\Fontwininto\WsMKGuTKQDoUceIpFc.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1904
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\Fontwininto\Q8Jl1DujYt.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2096
  - - C:\Users\Admin\AppData\Roaming\Fontwininto\FontwinintoRefdllNet.exe
      "C:\Users\Admin\AppData\Roaming\Fontwininto\FontwinintoRefdllNet.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Drops file in Program Files directory
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2784
    - - C:\Program Files\Common Files\Microsoft Shared\Stationery\csrss.exe
        
        "C:\Program Files\Common Files\Microsoft Shared\Stationery\csrss.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\Stationery\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:576

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\Logs\DISM\wininit.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\wow64win\winlogon.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1372

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\wship6\lsm.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\mfc110cht\lsm.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\OSPPSVC.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 "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\mf\winlogon.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1288

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\pcadm\spoolsv.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1396

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Fontwininto\Q8Jl1DujYt.bat

Filesize
48B

MD5
97e115a1bf240df8c7e2fc4af9bb2f19

SHA1
431d2f966b8c228ffaf52ca94ed47506ece641ec

SHA256
caac133a0bc69373d7a39ccf8be005d00873e91be6909c3d61f446798ba70360

SHA512
a7a3c5250af1a1df5d78d30edc96521a659764c4aece6d4b6238b5bca431e4e976ccd204697e177a337587c3cf960e5f9c0d39a031e4660cfd7d5897e24fced5

Download Submit
C:\Users\Admin\AppData\Roaming\Fontwininto\WsMKGuTKQDoUceIpFc.vbe

Filesize
205B

MD5
02a82d3b9ba301e2021ae64c83fb6ae5

SHA1
07436b2f55fc4cf70e880ea1b5372e012d68df8a

SHA256
d7d37b4bcea8754e1a3d11aec318ad00b0d2ec9c46818be98dc608282a204582

SHA512
d6cbd89ecfe65647274cbc476f15beeb624f274afdfa4fc78ef92a1ad000b72bf94174c56e63da24a1d36d1f2e851f7cdf59ee330b19344d26b818f92ede3613

Download Submit
\Users\Admin\AppData\Roaming\Fontwininto\FontwinintoRefdllNet.exe

Filesize
912KB

MD5
1ec0ef270ff4b08fa5b6436ab0ed39d0

SHA1
363e5655608be17b3ba57bf54cd2de3be943afb4

SHA256
98372c461f60eb37116d1a876433e4d333126ddbec61cfafa7e4ed64a9f7a844

SHA512
0d08cf20e83e876b82baf7bb04b829f67fe0afab262685a25012f3789541e484fb893647ede9ff2dc48d617c647564ef1533cdd54ecfe5c9838344b072b22bd9

Download Submit
memory/816-36-0x0000000000D40000-0x0000000000E2C000-memory.dmp

Filesize
944KB

Download
memory/2784-13-0x0000000000CB0000-0x0000000000D9C000-memory.dmp

Filesize
944KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads