dcrat | 661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176

General

Target

661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe
Size

2.1MB
MD5

7a193e404a6285a41aba3019479d1749
SHA1

e977d421b247ace0c630d118f05938460664c3b8
SHA256

661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176
SHA512

a93f289943e29c2a34dde3c7e12ce22641afa868b11c541120b48610f22447fe8fd1b8e64436886ac73facaefc3c82dd658129e49ab65917bfd27fd10278cd1c
SSDEEP

49152:abA30qELx3+NdmphJ3TWOodBNw8vNRf1Im/aN0mX3xfz:abdZ+NdmphJ3TWOsfNvNN2mybJ

Score

10^/10

dcrat discovery infostealer 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 15 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	2680	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3040	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2444	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	496	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2704	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1476	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	444	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1240	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2928	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1520	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2360	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1724	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	296	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1428	2608	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1544	2608	schtasks.exe	35

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x00080000000160d5-9.dat	dcrat
behavioral1/memory/2868-13-0x0000000001370000-0x0000000001540000-memory.dmp	dcrat
behavioral1/memory/1788-45-0x0000000000F90000-0x0000000001160000-memory.dmp	dcrat

Executes dropped EXE 2 IoCs

pid	Process
2868	System.exe
1788	explorer.exe

Loads dropped DLL 2 IoCs

pid	Process
2812	cmd.exe
2812	cmd.exe

Drops file in Program Files directory 6 IoCs

description	ioc	Process
File created	C:\Program Files\Uninstall Information\7a0fd90576e088	System.exe
File created	C:\Program Files (x86)\Internet Explorer\ja-JP\smss.exe	System.exe
File created	C:\Program Files (x86)\Internet Explorer\ja-JP\69ddcba757bf72	System.exe
File created	C:\Program Files\Reference Assemblies\lsass.exe	System.exe
File created	C:\Program Files\Reference Assemblies\6203df4a6bafc7	System.exe
File created	C:\Program Files\Uninstall Information\explorer.exe	System.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2444	schtasks.exe
2704	schtasks.exe
1240	schtasks.exe
1428	schtasks.exe
1544	schtasks.exe
3040	schtasks.exe
1476	schtasks.exe
2680	schtasks.exe
1520	schtasks.exe
496	schtasks.exe
444	schtasks.exe
2928	schtasks.exe
2360	schtasks.exe
1724	schtasks.exe
296	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2868	System.exe
1788	explorer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2868	System.exe
Token: SeDebugPrivilege	1788	explorer.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 2060	2528	661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe	30
PID 2528 wrote to memory of 2060	2528	661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe	30
PID 2528 wrote to memory of 2060	2528	661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe	30
PID 2528 wrote to memory of 2060	2528	661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe	30
PID 2060 wrote to memory of 2812	2060	WScript.exe	32
PID 2060 wrote to memory of 2812	2060	WScript.exe	32
PID 2060 wrote to memory of 2812	2060	WScript.exe	32
PID 2060 wrote to memory of 2812	2060	WScript.exe	32
PID 2812 wrote to memory of 2868	2812	cmd.exe	34
PID 2812 wrote to memory of 2868	2812	cmd.exe	34
PID 2812 wrote to memory of 2868	2812	cmd.exe	34
PID 2812 wrote to memory of 2868	2812	cmd.exe	34
PID 2868 wrote to memory of 1788	2868	System.exe	51
PID 2868 wrote to memory of 1788	2868	System.exe	51
PID 2868 wrote to memory of 1788	2868	System.exe	51

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\661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe
"C:\Users\Admin\AppData\Local\Temp\661b2c9879d7ae68512f820689f2198fdc2d71288ed0a6e747a0ae3f4a27f176.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ProgramData\ssh\gnR14pXyuoFKj0R1.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2060
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\ProgramData\ssh\ML9lnBLRkA6sXD0.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2812
  - - C:\ProgramData\ssh\System.exe
      "C:\\ProgramData\ssh\System.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2868
    - - C:\Program Files\Uninstall Information\explorer.exe
        
        "C:\Program Files\Uninstall Information\explorer.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1788

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\Recovery\1b8b1de2-69f6-11ef-9774-62cb582c238c\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\1b8b1de2-69f6-11ef-9774-62cb582c238c\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Recovery\1b8b1de2-69f6-11ef-9774-62cb582c238c\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2444

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\Program Files\Uninstall Information\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:496

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Program Files\Uninstall Information\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:444

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1240

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2928

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Internet Explorer\ja-JP\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\ja-JP\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2360

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Internet Explorer\ja-JP\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1724

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Program Files\Reference Assemblies\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Reference Assemblies\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1428

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\Program Files\Reference Assemblies\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1544

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

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\ssh\ML9lnBLRkA6sXD0.bat

Filesize
32B

MD5
4d4409a367ef4772862bea99e3e105b1

SHA1
ef19882a87bb8e86d100008e70f81d42c722be9c

SHA256
c0a3379f12d6d1b19373734f78ee5f83a30f09ad56d8b53ed68ad7fe1648ebd7

SHA512
7851ec4bc41aeda00384aaa3a6db48c76f0bb4e7ea7f90172796014c2d69ed02e9fd0fb985a2e7371abd58b1fd05c1e7fc8fbf243099932296b3c8dc5beeb285

Download Submit
C:\ProgramData\ssh\gnR14pXyuoFKj0R1.vbe

Filesize
209B

MD5
fb2fc99109e35aa3774b04520deb87f4

SHA1
1b1015ebf673817fbcee6b66efd432af5d51dbff

SHA256
4a983c159c5b21d11c880fbfecbb7cb68304b15544c498092a980deeaf3b01b8

SHA512
9761994364dc66a9229aceacf3079efe6cb24baf9dc831b2c4d97d36a6f5f3a6c5e9a9fcdba9d67cd66235723dac6cc80de40349f989f629ce0cf93c234dfe8e

Download Submit
\ProgramData\ssh\System.exe

Filesize
1.8MB

MD5
9e0f8efd67acc61e4cb3b213b22e21dd

SHA1
7a688b1df27a1ffa8c6afb8303de96b2e09ef802

SHA256
b3dd5c3207c91f7b1eec4405a632b23eeb6691a5ed1733fc3c1dc0a9a5783cb6

SHA512
8d362bc73adc3b284f0408d94e04d16a96588b121eccc8674e5f50ecea3086ea81511d27706536bb22b741a4e9c030ac90a021be5af2fdc419603fa45d04e805

Download Submit
memory/1788-45-0x0000000000F90000-0x0000000001160000-memory.dmp

Filesize
1.8MB

Download
memory/2868-20-0x0000000000660000-0x000000000066C000-memory.dmp

Filesize
48KB

Download
memory/2868-21-0x0000000000670000-0x000000000067C000-memory.dmp

Filesize
48KB

Download
memory/2868-16-0x0000000000460000-0x0000000000468000-memory.dmp

Filesize
32KB

Download
memory/2868-17-0x0000000000470000-0x000000000048C000-memory.dmp

Filesize
112KB

Download
memory/2868-18-0x0000000000630000-0x0000000000646000-memory.dmp

Filesize
88KB

Download
memory/2868-19-0x0000000000650000-0x0000000000660000-memory.dmp

Filesize
64KB

Download
memory/2868-14-0x0000000000440000-0x000000000044E000-memory.dmp

Filesize
56KB

Download
memory/2868-15-0x0000000000450000-0x000000000045E000-memory.dmp

Filesize
56KB

Download
memory/2868-22-0x0000000000680000-0x0000000000688000-memory.dmp

Filesize
32KB

Download
memory/2868-23-0x0000000000AC0000-0x0000000000AD2000-memory.dmp

Filesize
72KB

Download
memory/2868-24-0x0000000000B30000-0x0000000000B3C000-memory.dmp

Filesize
48KB

Download
memory/2868-25-0x0000000000B40000-0x0000000000B4E000-memory.dmp

Filesize
56KB

Download
memory/2868-26-0x0000000000B50000-0x0000000000B5E000-memory.dmp

Filesize
56KB

Download
memory/2868-27-0x0000000000B60000-0x0000000000B68000-memory.dmp

Filesize
32KB

Download
memory/2868-28-0x0000000000BF0000-0x0000000000BFC000-memory.dmp

Filesize
48KB

Download
memory/2868-13-0x0000000001370000-0x0000000001540000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads