dcrat | 2c638458e811cb805b444407dadcfd75f7e45b5711e2395cef26cf31f8f3fe2c

General

Target

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
Size

1.1MB
MD5

a61485606418948d428d99dc0a40d4b7
SHA1

a670ba1214d5637214ed5578bb31e67fcab6f3ed
SHA256

2c638458e811cb805b444407dadcfd75f7e45b5711e2395cef26cf31f8f3fe2c
SHA512

65dde767f795c316f8b394c164cfa1f22e3573c1e500b98ae345edfe37a34e0be698bfa252b32607f95bbb72a2a8f3992778f703fbba8b5bcfa101952a609e05
SSDEEP

24576:92HvItsNMDCUh1W+bn0UEeytTFZvWdcDrkbf+4:9a9O1WWn0UE1ysQy

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 5 IoCs

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

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1640	4000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5108	4000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1148	4000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1272	4000	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	816	4000	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral2/memory/2908-1-0x0000000000A00000-0x0000000000B18000-memory.dmp	dcrat
behavioral2/files/0x000a000000023b63-11.dat	dcrat

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

Processes:

TextInputHost.exe

pid	Process
3100	TextInputHost.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Documents and Settings\\RuntimeBroker.exe\""	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Windows\\System32\\remotesp\\fontdrvhost.exe\""	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\StartMenuExperienceHost = "\"C:\\Program Files\\dotnet\\shared\\Microsoft.WindowsDesktop.App\\StartMenuExperienceHost.exe\""	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Program Files\\VideoLAN\\VLC\\locale\\gd\\LC_MESSAGES\\SppExtComObj.exe\""	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\TextInputHost = "\"C:\\Windows\\SystemApps\\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\\InputApp\\TextInputHost\\TextInputHost.exe\""	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

Drops file in System32 directory 2 IoCs

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

description	ioc	Process
File created	C:\Windows\System32\remotesp\fontdrvhost.exe	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
File created	C:\Windows\System32\remotesp\5b884080fd4f94e2695da25c503f9e33b9605b83	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

Drops file in Program Files directory 5 IoCs

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

description	ioc	Process
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\StartMenuExperienceHost.exe	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\StartMenuExperienceHost.exe	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\55b276f4edf653fe07efe8f1ecc32d3d195abd16	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
File created	C:\Program Files\VideoLAN\VLC\locale\gd\LC_MESSAGES\SppExtComObj.exe	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
File created	C:\Program Files\VideoLAN\VLC\locale\gd\LC_MESSAGES\e1ef82546f0b02b7e974f28047f3788b1128cce1	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

Drops file in Windows directory 3 IoCs

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

description	ioc	Process
File created	C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost\TextInputHost.exe	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
File created	C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost\22eafd247d37c30fed3795ee41d259ec72bb351c	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
File created	C:\Windows\System\Speech\RuntimeBroker.exe	a61485606418948d428d99dc0a40d4b7_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

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\Local Settings	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs

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

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	Process
1640	schtasks.exe
5108	schtasks.exe
1148	schtasks.exe
1272	schtasks.exe
816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exeTextInputHost.exe

pid	Process
2908	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
2908	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
2908	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
3100	TextInputHost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exeTextInputHost.exe

description	pid	Process
Token: SeDebugPrivilege	2908	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
Token: SeDebugPrivilege	3100	TextInputHost.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

a61485606418948d428d99dc0a40d4b7_JaffaCakes118.execmd.exe

description	pid	Process	procid_target
PID 2908 wrote to memory of 1124	2908	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe	88
PID 2908 wrote to memory of 1124	2908	a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe	88
PID 1124 wrote to memory of 3352	1124	cmd.exe	90
PID 1124 wrote to memory of 3352	1124	cmd.exe	90
PID 1124 wrote to memory of 3652	1124	cmd.exe	91
PID 1124 wrote to memory of 3652	1124	cmd.exe	91
PID 1124 wrote to memory of 3100	1124	cmd.exe	95
PID 1124 wrote to memory of 3100	1124	cmd.exe	95

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\a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a61485606418948d428d99dc0a40d4b7_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- 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:2908
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\fiHrS4Fy3g.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1124
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3352
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:3652
- - C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost\TextInputHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost\TextInputHost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3100

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files\VideoLAN\VLC\locale\gd\LC_MESSAGES\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Documents and Settings\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1272

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\remotesp\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:816

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:\Users\Admin\AppData\Local\Temp\fiHrS4Fy3g.bat

Filesize
320B

MD5
b8091ea326a386a6a604a09da5548c55

SHA1
34edede7137773a95142bbe7ab8796fc4e25cc99

SHA256
9a037f94d61e12d75aa64cf3df7eb31ba9d54d9d1e059a9356900a991f884bb8

SHA512
3f55bc106426a8f64c9c57ec569bae03eefb1ee86cc9705e2b7eeb60ae917dafa15e361f18d553d108fca1b80273213b3e2467a04a5ee749f8025dce72810b5b

Download Submit
C:\Windows\System32\remotesp\fontdrvhost.exe

Filesize
1.1MB

MD5
a61485606418948d428d99dc0a40d4b7

SHA1
a670ba1214d5637214ed5578bb31e67fcab6f3ed

SHA256
2c638458e811cb805b444407dadcfd75f7e45b5711e2395cef26cf31f8f3fe2c

SHA512
65dde767f795c316f8b394c164cfa1f22e3573c1e500b98ae345edfe37a34e0be698bfa252b32607f95bbb72a2a8f3992778f703fbba8b5bcfa101952a609e05

Download Submit
memory/2908-0-0x00007FFB82543000-0x00007FFB82545000-memory.dmp

Filesize
8KB

Download
memory/2908-1-0x0000000000A00000-0x0000000000B18000-memory.dmp

Filesize
1.1MB

Download
memory/2908-2-0x00007FFB82540000-0x00007FFB83001000-memory.dmp

Filesize
10.8MB

Download
memory/2908-18-0x00007FFB82540000-0x00007FFB83001000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads