dcrat | 05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1

General

Target

05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Size

1.8MB
MD5

5d232371c6b04bf6e609ee14fc06f3f6
SHA1

d6b7e0e98b0bd964ce6b2256f7c3f52ea2ec39ba
SHA256

05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1
SHA512

18b7ae05853bbe0109b3f00861b97951a7963036bbe021b3a2ae178c810257033e249613e522c3a4c16ceaa415f3358b8a052c28f321c6128228f38367991cc6
SSDEEP

49152:DT+08U5LLZTm94oY5RMRyAhpXDQt1UJo:DT8EL4I5EfG

Score

10^/10

dcrat evasion infostealer rat trojan

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 12 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	2652	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2532	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2580	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2968	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2380	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1752	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2108	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2104	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2368	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2056	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1748	2856	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2236	2856	schtasks.exe	30

UAC bypass 3 TTPs 6 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	taskhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	taskhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	taskhost.exe

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2648-1-0x0000000000F30000-0x00000000010FC000-memory.dmp	dcrat
behavioral1/files/0x0007000000016d06-25.dat	dcrat
behavioral1/memory/2052-31-0x0000000000E10000-0x0000000000FDC000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2052	taskhost.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	taskhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	taskhost.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\VideoLAN\VLC\hrtfs\lsm.exe	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\hrtfs\lsm.exe	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
File created	C:\Program Files\VideoLAN\VLC\hrtfs\101b941d020240	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2580	schtasks.exe
2968	schtasks.exe
2380	schtasks.exe
1752	schtasks.exe
1748	schtasks.exe
2236	schtasks.exe
2652	schtasks.exe
2532	schtasks.exe
2108	schtasks.exe
2104	schtasks.exe
2368	schtasks.exe
2056	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2648	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
2052	taskhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Token: SeDebugPrivilege	2052	taskhost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2052	2648	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe	43
PID 2648 wrote to memory of 2052	2648	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe	43
PID 2648 wrote to memory of 2052	2648	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe	43

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	taskhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	taskhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	taskhost.exe

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\05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
"C:\Users\Admin\AppData\Local\Temp\05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe"
1⤵
- UAC bypass
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2648
- C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\taskhost.exe
  "C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\taskhost.exe"
  2⤵
  - UAC bypass
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - System policy modification
  PID:2052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 11 /tr "'C:\Program Files\VideoLAN\VLC\hrtfs\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files\VideoLAN\VLC\hrtfs\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\Program Files\VideoLAN\VLC\hrtfs\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Users\All Users\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\All Users\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2380

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Users\All Users\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 10 /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2368

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 12 /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2056

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 13 /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\taskhost.exe

Filesize
1.8MB

MD5
5d232371c6b04bf6e609ee14fc06f3f6

SHA1
d6b7e0e98b0bd964ce6b2256f7c3f52ea2ec39ba

SHA256
05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1

SHA512
18b7ae05853bbe0109b3f00861b97951a7963036bbe021b3a2ae178c810257033e249613e522c3a4c16ceaa415f3358b8a052c28f321c6128228f38367991cc6

Download Submit
memory/2052-33-0x0000000000C90000-0x0000000000CA2000-memory.dmp

Filesize
72KB

Download
memory/2052-31-0x0000000000E10000-0x0000000000FDC000-memory.dmp

Filesize
1.8MB

Download
memory/2648-10-0x0000000000B00000-0x0000000000B12000-memory.dmp

Filesize
72KB

Download
memory/2648-14-0x0000000000D70000-0x0000000000D7E000-memory.dmp

Filesize
56KB

Download
memory/2648-5-0x0000000000A20000-0x0000000000A36000-memory.dmp

Filesize
88KB

Download
memory/2648-6-0x0000000000AC0000-0x0000000000AC8000-memory.dmp

Filesize
32KB

Download
memory/2648-7-0x0000000000AF0000-0x0000000000B02000-memory.dmp

Filesize
72KB

Download
memory/2648-8-0x0000000000AE0000-0x0000000000AF0000-memory.dmp

Filesize
64KB

Download
memory/2648-9-0x0000000000AD0000-0x0000000000ADA000-memory.dmp

Filesize
40KB

Download
memory/2648-0-0x000007FEF4D23000-0x000007FEF4D24000-memory.dmp

Filesize
4KB

Download
memory/2648-11-0x0000000000D40000-0x0000000000D4C000-memory.dmp

Filesize
48KB

Download
memory/2648-4-0x0000000000760000-0x000000000077C000-memory.dmp

Filesize
112KB

Download
memory/2648-13-0x0000000000D60000-0x0000000000D68000-memory.dmp

Filesize
32KB

Download
memory/2648-12-0x0000000000D50000-0x0000000000D5E000-memory.dmp

Filesize
56KB

Download
memory/2648-15-0x0000000000D80000-0x0000000000D8C000-memory.dmp

Filesize
48KB

Download
memory/2648-16-0x0000000000D90000-0x0000000000D9C000-memory.dmp

Filesize
48KB

Download
memory/2648-3-0x0000000000540000-0x000000000054E000-memory.dmp

Filesize
56KB

Download
memory/2648-2-0x000007FEF4D20000-0x000007FEF570C000-memory.dmp

Filesize
9.9MB

Download
memory/2648-32-0x000007FEF4D20000-0x000007FEF570C000-memory.dmp

Filesize
9.9MB

Download
memory/2648-1-0x0000000000F30000-0x00000000010FC000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads