dcrat | 6ab8569493f8b26107d701117956341d4b880ffa0d5e5e498380e9e21fad6ca4

General

Target

JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
Size

911KB
MD5

056f58dfd4dbd2472994437d57da6515
SHA1

b25732eeed9b92fa7c41e4d5f624e543841fb889
SHA256

6ab8569493f8b26107d701117956341d4b880ffa0d5e5e498380e9e21fad6ca4
SHA512

1d2f09ad6b752ab5d18797ebbc22991e04a3df27e3dce85f31446690c595b6550cd9db6ec69aaa57b307e36d3f1f247fb37bdfa9fb76496a3fa5e76423e7e1d3
SSDEEP

12288:lcz/RVjOGM6ToNFDsf2CXtq9ackJ74jpDDpXvjLaACqn4:lcTvrMVYNXg9r2MNpXvjuH+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 5 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	4516	3932	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3164	3932	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4348	3932	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4744	3932	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4168	3932	schtasks.exe	85

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1844-1-0x00000000004E0000-0x00000000005CA000-memory.dmp	dcrat
behavioral2/files/0x0007000000023ce1-11.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe

Executes dropped EXE 1 IoCs

pid	Process
3016	StartMenuExperienceHost.exe

Adds Run key to start application 2 TTPs 5 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\StartMenuExperienceHost = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\AppxManifest\\StartMenuExperienceHost.exe\""	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Recovery\\WindowsRE\\csrss.exe\""	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Users\\All Users\\Microsoft\\Storage Health\\sysmon.exe\""	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\backgroundTaskHost = "\"C:\\Users\\All Users\\backgroundTaskHost.exe\""	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\KBDAZE\\dllhost.exe\""	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\System32\KBDAZE\dllhost.exe	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
File created	C:\Windows\System32\KBDAZE\5940a34987c99120d96dace90a3f93f329dcad63	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxManifest\55b276f4edf653fe07efe8f1ecc32d3d195abd16	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
File created	C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxManifest\StartMenuExperienceHost.exe	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
File opened for modification	C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxManifest\StartMenuExperienceHost.exe	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.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-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.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

pid	Process
4516	schtasks.exe
3164	schtasks.exe
4348	schtasks.exe
4744	schtasks.exe
4168	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1844	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
1844	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
1844	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
3016	StartMenuExperienceHost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1844	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
Token: SeDebugPrivilege	3016	StartMenuExperienceHost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1844 wrote to memory of 1384	1844	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe	91
PID 1844 wrote to memory of 1384	1844	JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe	91
PID 1384 wrote to memory of 1944	1384	cmd.exe	93
PID 1384 wrote to memory of 1944	1384	cmd.exe	93
PID 1384 wrote to memory of 3016	1384	cmd.exe	95
PID 1384 wrote to memory of 3016	1384	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\JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_056f58dfd4dbd2472994437d57da6515.exe"
1⤵
- 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:1844
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1xz1JFqiw3.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1384
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1944
- - C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxManifest\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxManifest\StartMenuExperienceHost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxManifest\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3164

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Users\All Users\Microsoft\Storage Health\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4348

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Users\All Users\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4168

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\KBDAZE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4744

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\1xz1JFqiw3.bat

Filesize
282B

MD5
da64f7627c8086b936042e56d4b74397

SHA1
b16fc26386ef4b19cd74146e35da8e300703478c

SHA256
33b44b94e8b925adea70cd254eee990bfaa82edb7027a493fe5e66ab71ad3ad4

SHA512
1a751d2e60f61b4e15e54eb6d24b68772e9db0ddc59693f71a4a34f36627ebd025d3494b93cee685c971ffbdfbce8d8203e478cb9d138b0f53b5d0c5601fa326

Download Submit
C:\Windows\System32\KBDAZE\dllhost.exe

Filesize
911KB

MD5
056f58dfd4dbd2472994437d57da6515

SHA1
b25732eeed9b92fa7c41e4d5f624e543841fb889

SHA256
6ab8569493f8b26107d701117956341d4b880ffa0d5e5e498380e9e21fad6ca4

SHA512
1d2f09ad6b752ab5d18797ebbc22991e04a3df27e3dce85f31446690c595b6550cd9db6ec69aaa57b307e36d3f1f247fb37bdfa9fb76496a3fa5e76423e7e1d3

Download Submit
memory/1844-0-0x00007FFBF2D03000-0x00007FFBF2D05000-memory.dmp

Filesize
8KB

Download
memory/1844-1-0x00000000004E0000-0x00000000005CA000-memory.dmp

Filesize
936KB

Download
memory/1844-4-0x00007FFBF2D00000-0x00007FFBF37C1000-memory.dmp

Filesize
10.8MB

Download
memory/1844-18-0x00007FFBF2D00000-0x00007FFBF37C1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads