dcrat | af00e3c4645fac761a47656f84d5c2036307f00bb01a6fc5be008e5839e4a010

General

Target

fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Size

1.2MB
MD5

fd4a3af3861edfa99ca15c7b6dff39b2
SHA1

00cd93349f4ab8a3b5896440e31dc899cd8585b6
SHA256

af00e3c4645fac761a47656f84d5c2036307f00bb01a6fc5be008e5839e4a010
SHA512

8e447c4c017f3573b7c13b01fa6f2bebcc24ebf7b1ca859fc216b16003b0feec95b21a45906c0d6d180a312a73a9b8c4b0cf9c7db336f3ba8d449a39ba09be4b
SSDEEP

12288:BgHD+WWwXwSqYkjyPnV8GH2Yhpgqx+5R9BIPkMj3lH4cLRCUwphVlEAJqn4:BM+WnHMjyPV8o2Yv+YL31/LCtJ+4

Score

10^/10

dcrat infostealer persistence rat

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Dcrat family
dcrat

Process spawned unexpected child process 11 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	3716	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4576	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5048	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3296	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1372	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1044	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1136	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	696	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3480	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3948	4496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4108	4496	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1456-1-0x0000000000570000-0x000000000069E000-memory.dmp	dcrat
behavioral2/files/0x0007000000023c7f-11.dat	dcrat

Checks computer location settings 2 TTPs 2 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
4648	WmiPrvSE.exe

Adds Run key to start application 2 TTPs 11 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\WmiPrvSE = "\"C:\\PerfLogs\\WmiPrvSE.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Windows\\System32\\BthTelemetry\\SppExtComObj.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\DictationManager\\dllhost.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\iscsilog\\dllhost.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\TextInputHost = "\"C:\\Windows\\SystemApps\\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\\InputApp\\LayoutData\\TextInputHost.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\Windows\\System32\\msfeeds\\taskhostw.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Program Files (x86)\\MSBuild\\Microsoft\\Windows Workflow Foundation\\v3.0\\dwm.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sihost = "\"C:\\Windows\\System32\\MSAMRNBSource\\sihost.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Idle = "\"C:\\Documents and Settings\\Idle.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\avrt\\RuntimeBroker.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\ProgramData\\Oracle\\Java\\.oracle_jre_usage\\fontdrvhost.exe\""	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe

Drops file in System32 directory 14 IoCs

description	ioc	Process
File created	C:\Windows\System32\DictationManager\dllhost.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\avrt\RuntimeBroker.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File opened for modification	C:\Windows\System32\avrt\RuntimeBroker.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\msfeeds\taskhostw.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\msfeeds\ea9f0e6c9e2dcd4dfacdaf29ba21541fb815a988	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\iscsilog\dllhost.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File opened for modification	C:\Windows\System32\MSAMRNBSource\sihost.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\MSAMRNBSource\66fc9ff0ee96c2b21f0cfded48750ae9e3032bf3	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\BthTelemetry\SppExtComObj.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\BthTelemetry\e1ef82546f0b02b7e974f28047f3788b1128cce1	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\DictationManager\5940a34987c99120d96dace90a3f93f329dcad63	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\avrt\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\iscsilog\5940a34987c99120d96dace90a3f93f329dcad63	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\System32\MSAMRNBSource\sihost.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\dwm.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\6cb0b6c459d5d3455a3da700e713f2e2529862ff	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\TextInputHost.exe	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
File created	C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\22eafd247d37c30fed3795ee41d259ec72bb351c	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 11 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3716	schtasks.exe
4576	schtasks.exe
1136	schtasks.exe
696	schtasks.exe
3480	schtasks.exe
3948	schtasks.exe
4108	schtasks.exe
5048	schtasks.exe
3296	schtasks.exe
1372	schtasks.exe
1044	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
2036	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
2036	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
2036	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
2036	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
4648	WmiPrvSE.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Token: SeDebugPrivilege	2036	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
Token: SeDebugPrivilege	4648	WmiPrvSE.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1456 wrote to memory of 2036	1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe	89
PID 1456 wrote to memory of 2036	1456	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe	89
PID 2036 wrote to memory of 1188	2036	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe	96
PID 2036 wrote to memory of 1188	2036	fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe	96
PID 1188 wrote to memory of 2148	1188	cmd.exe	98
PID 1188 wrote to memory of 2148	1188	cmd.exe	98
PID 1188 wrote to memory of 64	1188	cmd.exe	99
PID 1188 wrote to memory of 64	1188	cmd.exe	99
PID 1188 wrote to memory of 4648	1188	cmd.exe	101
PID 1188 wrote to memory of 4648	1188	cmd.exe	101

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\fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- 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:1456
- C:\Users\Admin\AppData\Local\Temp\fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Drops file in System32 directory
  - Drops file in Windows directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\b0xAWdqkSe.bat"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1188
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:2148
  - - C:\Windows\system32\w32tm.exe
      w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
      4⤵
      PID:64
  - - C:\PerfLogs\WmiPrvSE.exe
      "C:\PerfLogs\WmiPrvSE.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\avrt\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\ProgramData\Oracle\Java\.oracle_jre_usage\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4576

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\msfeeds\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5048

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\iscsilog\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1372

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\System32\MSAMRNBSource\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1044

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\LayoutData\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1136

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

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Documents and Settings\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3480

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\BthTelemetry\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\DictationManager\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4108

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\dwm.exe

Filesize
1.2MB

MD5
fd4a3af3861edfa99ca15c7b6dff39b2

SHA1
00cd93349f4ab8a3b5896440e31dc899cd8585b6

SHA256
af00e3c4645fac761a47656f84d5c2036307f00bb01a6fc5be008e5839e4a010

SHA512
8e447c4c017f3573b7c13b01fa6f2bebcc24ebf7b1ca859fc216b16003b0feec95b21a45906c0d6d180a312a73a9b8c4b0cf9c7db336f3ba8d449a39ba09be4b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\fd4a3af3861edfa99ca15c7b6dff39b2_JaffaCakes118.exe.log

Filesize
1KB

MD5
b7c0c43fc7804baaa7dc87152cdc9554

SHA1
1bab62bd56af745678d4e967d91e1ccfdeed4038

SHA256
46386a61f3aaf1b1c2e6efc9fc7e9e9ff16cd13ae58b8d856835771fedb6d457

SHA512
9fda3dd00a3406137e0113f13f78e77b20a76512b35820d38df696842cbbf2e2ebabfb99a3846c9637ecb54af858ec1551521187e379872973006426a253f769

Download Submit
C:\Users\Admin\AppData\Local\Temp\b0xAWdqkSe.bat

Filesize
240B

MD5
fb144a3fc304a71f2def8c9fd29a20b4

SHA1
8677a8c28de33b4f228aa309bd7250fad03f028e

SHA256
c0713c95d5e79b2be00a0413248c4ed899d0d3fc5130f977cccf66c0377e8e18

SHA512
e73053616686edab8924464a690dc15002457400a78c6ed53f9a96126f480402eb1fdcce8939e78ed8aad28ec76adc892805caa6d5ee10ee64a4b0ebfef4f141

Download Submit
memory/1456-0-0x00007FF97C103000-0x00007FF97C105000-memory.dmp

Filesize
8KB

Download
memory/1456-1-0x0000000000570000-0x000000000069E000-memory.dmp

Filesize
1.2MB

Download
memory/1456-2-0x00007FF97C100000-0x00007FF97CBC1000-memory.dmp

Filesize
10.8MB

Download
memory/1456-15-0x00007FF97C100000-0x00007FF97CBC1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads