dcrat | 8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c

General

Target

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Size

682KB
MD5

054590792d65d5db6a5270d6ad965b93
SHA1

bd04bb88a8ee09284e3e0eba53677f6b999d1b46
SHA256

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c
SHA512

818e9a0ee0fa54874b811cd6fd5f61fc014508c84ec8f09f4d53b52a1f12a15a1b1cc516c35189352bc328c2cde659f969dfc6741b1319ba91689a2a19dce07e
SSDEEP

12288:RqnO3mwJNoGFAgHCRvp1i/fjqJRYFInDrX/xTU3JgXDV6blx1wgtra7B:R+O3mwJnCRvEMxnDVSwgY

Score

10^/10

dcrat evasion infostealer persistence 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 4 IoCs

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

Processes:

schtasks.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	2840	2744	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2708	2744	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2608	2744	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2628	2744	schtasks.exe	30

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral1/memory/1708-1-0x0000000001070000-0x0000000001122000-memory.dmp	dcrat
behavioral1/files/0x000700000001660e-20.dat	dcrat
behavioral1/files/0x000800000001660e-30.dat	dcrat
behavioral1/memory/2916-75-0x0000000000FE0000-0x0000000001092000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

Processes:

dwm.exe

pid	Process
2916	dwm.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Program Files\\Windows Journal\\ja-JP\\dwm.exe\""	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\icsunattend\\dllhost.exe\""	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Documents and Settings\\sppsvc.exe\""	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\dd_wcf_CA_smci_20240903_051544_496\\8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe\""	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

Drops file in System32 directory 5 IoCs

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

description	ioc	Process
File created	C:\Windows\System32\icsunattend\dllhost.exe	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File created	C:\Windows\System32\icsunattend\5940a34987c99120d96dace90a3f93f329dcad63	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File opened for modification	C:\Windows\System32\icsunattend\RCXA587.tmp	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File opened for modification	C:\Windows\System32\icsunattend\RCXA588.tmp	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File opened for modification	C:\Windows\System32\icsunattend\dllhost.exe	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

Drops file in Program Files directory 5 IoCs

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

description	ioc	Process
File opened for modification	C:\Program Files\Windows Journal\ja-JP\dwm.exe	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File created	C:\Program Files\Windows Journal\ja-JP\6cb0b6c459d5d3455a3da700e713f2e2529862ff	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File opened for modification	C:\Program Files\Windows Journal\ja-JP\RCXA2F5.tmp	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File opened for modification	C:\Program Files\Windows Journal\ja-JP\RCXA364.tmp	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
File created	C:\Program Files\Windows Journal\ja-JP\dwm.exe	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.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 4 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.exe

pid	Process
2628	schtasks.exe
2840	schtasks.exe
2708	schtasks.exe
2608	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

pid	Process
1708	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exedwm.exe

description	pid	Process
Token: SeDebugPrivilege	1708	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Token: SeDebugPrivilege	2916	dwm.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

description	pid	Process	procid_target
PID 1708 wrote to memory of 2916	1708	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe	35
PID 1708 wrote to memory of 2916	1708	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe	35
PID 1708 wrote to memory of 2916	1708	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe	35

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.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\8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe
"C:\Users\Admin\AppData\Local\Temp\8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe"
1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1708
- C:\Program Files\Windows Journal\ja-JP\dwm.exe
  "C:\Program Files\Windows Journal\ja-JP\dwm.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Windows Journal\ja-JP\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2840

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\icsunattend\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Documents and Settings\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\dd_wcf_CA_smci_20240903_051544_496\8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2628

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

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

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

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

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Downloads

C:\Program Files\Windows Journal\ja-JP\dwm.exe

Filesize
682KB

MD5
316b92add7691a9dc89bad2d3022b8df

SHA1
63525e4aa4618446e68118e31a278c9af5608a24

SHA256
f650f7ee2d624acd463526064d3be55ea833f3a6e2b682d3a3e16ef1a125ff93

SHA512
b457aafc169f03346c47f3afcd49be4afefb61c2693d5b4d5f52aa1ad5f2d8c92a607f361773277fb8f48610f4e775fdff7d48bc5b90acdd0ee3817d175ce3bc

Download Submit
C:\Users\Admin\AppData\Local\Temp\RCXA0F2.tmp

Filesize
682KB

MD5
054590792d65d5db6a5270d6ad965b93

SHA1
bd04bb88a8ee09284e3e0eba53677f6b999d1b46

SHA256
8b0b1728b6bcac3675b0e14ec262c061252bb9be0ac121d4342ac790ac96d51c

SHA512
818e9a0ee0fa54874b811cd6fd5f61fc014508c84ec8f09f4d53b52a1f12a15a1b1cc516c35189352bc328c2cde659f969dfc6741b1319ba91689a2a19dce07e

Download Submit
memory/1708-3-0x0000000000150000-0x0000000000160000-memory.dmp

Filesize
64KB

Download
memory/1708-0-0x000007FEF5483000-0x000007FEF5484000-memory.dmp

Filesize
4KB

Download
memory/1708-4-0x0000000000160000-0x000000000016C000-memory.dmp

Filesize
48KB

Download
memory/1708-5-0x0000000000170000-0x000000000017C000-memory.dmp

Filesize
48KB

Download
memory/1708-6-0x0000000000190000-0x000000000019A000-memory.dmp

Filesize
40KB

Download
memory/1708-7-0x0000000000180000-0x0000000000188000-memory.dmp

Filesize
32KB

Download
memory/1708-8-0x00000000003A0000-0x00000000003AC000-memory.dmp

Filesize
48KB

Download
memory/1708-2-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1708-1-0x0000000001070000-0x0000000001122000-memory.dmp

Filesize
712KB

Download
memory/1708-76-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/2916-75-0x0000000000FE0000-0x0000000001092000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads