dcrat | dbe0a12ddd61fa89d149ddc5fac4cf9cfec85fc64e7f29459d9c88049af8a0de

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	2716	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2568	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2884	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2872	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2748	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2732	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2556	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2604	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3048	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3060	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2288	2768	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2628	2768	schtasks.exe	31

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

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2644-1-0x00000000010E0000-0x00000000012AC000-memory.dmp	dcrat
behavioral1/files/0x000600000001924c-25.dat	dcrat
behavioral1/memory/2068-32-0x0000000000B80000-0x0000000000D4C000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2068	System.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	System.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	System.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Portable Devices\69ddcba757bf72	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
File created	C:\Program Files (x86)\Windows Portable Devices\smss.exe	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
File opened for modification	C:\Program Files (x86)\Windows Portable Devices\smss.exe	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\Media\Festival\winlogon.exe	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
File created	C:\Windows\Media\Festival\cc11b995f2a76d	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
File created	C:\Windows\es-ES\lsm.exe	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
File created	C:\Windows\es-ES\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
3048	schtasks.exe
3060	schtasks.exe
2288	schtasks.exe
2568	schtasks.exe
2872	schtasks.exe
2748	schtasks.exe
2556	schtasks.exe
2604	schtasks.exe
2628	schtasks.exe
2716	schtasks.exe
2884	schtasks.exe
2732	schtasks.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
2644	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
2644	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
2644	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe
2068	System.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2644	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe
Token: SeDebugPrivilege	2068	System.exe
Token: SeBackupPrivilege	2000	vssvc.exe
Token: SeRestorePrivilege	2000	vssvc.exe
Token: SeAuditPrivilege	2000	vssvc.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2644 wrote to memory of 2068	2644	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe	44
PID 2644 wrote to memory of 2068	2644	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe	44
PID 2644 wrote to memory of 2068	2644	05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1.exe	44

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"	System.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	System.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	System.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

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
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

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
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2644
- C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\System.exe
  "C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\System.exe"
  2⤵
  - UAC bypass
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - System policy modification
  PID:2068

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Portable Devices\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2568

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Portable Devices\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Windows\Media\Festival\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\Media\Festival\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2748

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 11 /tr "'C:\Windows\Media\Festival\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2732

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3048

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 8 /tr "'C:\Windows\es-ES\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\es-ES\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2288

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 6 /tr "'C:\Windows\es-ES\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2628

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2000

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2512

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

Loading Replay Monitor...

Downloads

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\System.exe

Filesize
1.8MB

MD5
5d232371c6b04bf6e609ee14fc06f3f6

SHA1
d6b7e0e98b0bd964ce6b2256f7c3f52ea2ec39ba

SHA256
05c4814add59df3a27d840a1494002ac0b0e49aa9348229bd9f438d87e3e56c1

SHA512
18b7ae05853bbe0109b3f00861b97951a7963036bbe021b3a2ae178c810257033e249613e522c3a4c16ceaa415f3358b8a052c28f321c6128228f38367991cc6

Download Submit
memory/2068-33-0x0000000000650000-0x0000000000662000-memory.dmp

Filesize
72KB

Download
memory/2068-32-0x0000000000B80000-0x0000000000D4C000-memory.dmp

Filesize
1.8MB

Download
memory/2644-10-0x0000000000A60000-0x0000000000A72000-memory.dmp

Filesize
72KB

Download
memory/2644-12-0x0000000000CD0000-0x0000000000CDE000-memory.dmp

Filesize
56KB

Download
memory/2644-5-0x0000000000A20000-0x0000000000A36000-memory.dmp

Filesize
88KB

Download
memory/2644-6-0x0000000000A40000-0x0000000000A48000-memory.dmp

Filesize
32KB

Download
memory/2644-7-0x0000000000A70000-0x0000000000A82000-memory.dmp

Filesize
72KB

Download
memory/2644-8-0x0000000000A80000-0x0000000000A90000-memory.dmp

Filesize
64KB

Download
memory/2644-9-0x0000000000A50000-0x0000000000A5A000-memory.dmp

Filesize
40KB

Download
memory/2644-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

Filesize
4KB

Download
memory/2644-11-0x0000000000A90000-0x0000000000A9C000-memory.dmp

Filesize
48KB

Download
memory/2644-4-0x0000000000460000-0x000000000047C000-memory.dmp

Filesize
112KB

Download
memory/2644-13-0x0000000000CE0000-0x0000000000CE8000-memory.dmp

Filesize
32KB

Download
memory/2644-14-0x0000000000CF0000-0x0000000000CFE000-memory.dmp

Filesize
56KB

Download
memory/2644-15-0x0000000000D00000-0x0000000000D0C000-memory.dmp

Filesize
48KB

Download
memory/2644-16-0x0000000000D90000-0x0000000000D9C000-memory.dmp

Filesize
48KB

Download
memory/2644-3-0x0000000000450000-0x000000000045E000-memory.dmp

Filesize
56KB

Download
memory/2644-31-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/2644-2-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Filesize
9.9MB

Download
memory/2644-1-0x00000000010E0000-0x00000000012AC000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads