dcrat | e3b4620b85709a793de2b777da764d094f9a6dc19ead0a7fcad953c1fb3e8550

General

Target

XBinderOutput1.exe
Size

607KB
MD5

19d31479381cfda2c9878b427f51a0c2
SHA1

5b8774c60b71dd32e7325d0fbceb3434975ca7cc
SHA256

e3b4620b85709a793de2b777da764d094f9a6dc19ead0a7fcad953c1fb3e8550
SHA512

14ce10c974af40f5ab3e93f3bb3ff5ada22a8c2245bf45f40be0a59a75bcd9bfb2bf2288416744a2cebb93b3eb487ba070670d553ea87ca8c0e566c727bf28a2
SSDEEP

12288:DikJ/Wmo/J594F3o472LiJgSifSdq/UByol53uFb/V4YUWpcZm83:TJ/+z4F3osuiKoqsyol54bWYUK

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 24 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	2616	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2632	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2736	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2264	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1300	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2872	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2848	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2876	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2716	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1356	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2972	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2680	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1984	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1944	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1896	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	296	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1760	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1916	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2064	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	780	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1208	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1484	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1540	2900	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2220	2900	schtasks.exe	35

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000900000001225f-6.dat	dcrat
behavioral1/files/0x0007000000016d5a-21.dat	dcrat
behavioral1/memory/2940-22-0x0000000000F40000-0x0000000001016000-memory.dmp	dcrat
behavioral1/memory/1340-45-0x0000000001260000-0x0000000001336000-memory.dmp	dcrat

Executes dropped EXE 3 IoCs

pid	Process
2376	kendalcp.exe
2940	reviewDll.exe
1340	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
2772	cmd.exe
2772	cmd.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\dllhost.exe	reviewDll.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\dllhost.exe	reviewDll.exe
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\5940a34987c991	reviewDll.exe
File created	C:\Program Files (x86)\Windows Media Player\es-ES\csrss.exe	reviewDll.exe
File created	C:\Program Files (x86)\Windows Media Player\es-ES\886983d96e3d3e	reviewDll.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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kendalcp.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 24 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1944	schtasks.exe
780	schtasks.exe
1208	schtasks.exe
2616	schtasks.exe
2632	schtasks.exe
1300	schtasks.exe
2716	schtasks.exe
1984	schtasks.exe
1484	schtasks.exe
2872	schtasks.exe
1356	schtasks.exe
296	schtasks.exe
1540	schtasks.exe
2220	schtasks.exe
2736	schtasks.exe
2876	schtasks.exe
2680	schtasks.exe
1760	schtasks.exe
1916	schtasks.exe
2264	schtasks.exe
2848	schtasks.exe
2972	schtasks.exe
1896	schtasks.exe
2064	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2940	reviewDll.exe
1340	csrss.exe
1340	csrss.exe
1340	csrss.exe
1340	csrss.exe
1340	csrss.exe
1340	csrss.exe
1340	csrss.exe
1340	csrss.exe
1340	csrss.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1340	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	reviewDll.exe
Token: SeDebugPrivilege	1340	csrss.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2376	2120	XBinderOutput1.exe	30
PID 2120 wrote to memory of 2376	2120	XBinderOutput1.exe	30
PID 2120 wrote to memory of 2376	2120	XBinderOutput1.exe	30
PID 2120 wrote to memory of 2376	2120	XBinderOutput1.exe	30
PID 2376 wrote to memory of 1664	2376	kendalcp.exe	31
PID 2376 wrote to memory of 1664	2376	kendalcp.exe	31
PID 2376 wrote to memory of 1664	2376	kendalcp.exe	31
PID 2376 wrote to memory of 1664	2376	kendalcp.exe	31
PID 1664 wrote to memory of 2772	1664	WScript.exe	32
PID 1664 wrote to memory of 2772	1664	WScript.exe	32
PID 1664 wrote to memory of 2772	1664	WScript.exe	32
PID 1664 wrote to memory of 2772	1664	WScript.exe	32
PID 2772 wrote to memory of 2940	2772	cmd.exe	34
PID 2772 wrote to memory of 2940	2772	cmd.exe	34
PID 2772 wrote to memory of 2940	2772	cmd.exe	34
PID 2772 wrote to memory of 2940	2772	cmd.exe	34
PID 2940 wrote to memory of 1340	2940	reviewDll.exe	60
PID 2940 wrote to memory of 1340	2940	reviewDll.exe	60
PID 2940 wrote to memory of 1340	2940	reviewDll.exe	60

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\XBinderOutput1.exe
"C:\Users\Admin\AppData\Local\Temp\XBinderOutput1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2120
- C:\Users\Admin\AppData\Local\Temp\kendalcp.exe
  "C:\Users\Admin\AppData\Local\Temp\kendalcp.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\blocksavesperfMonitorDll\R7uOS4kiQeNNM8oo5bGADNHtfWe.vbe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1664
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\blocksavesperfMonitorDll\SAymW4LctOmWulF1E6221.bat" "
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2772
    - - C:\blocksavesperfMonitorDll\reviewDll.exe
        
        "C:\blocksavesperfMonitorDll\reviewDll.exe"
        5⤵
        Executes dropped EXE
        Drops file in Program Files directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2940
      - C:\Program Files (x86)\Windows Media Player\es-ES\csrss.exe
        
        "C:\Program Files (x86)\Windows Media Player\es-ES\csrss.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:1340

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2616

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2736

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\blocksavesperfMonitorDll\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2264

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\blocksavesperfMonitorDll\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1300

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 12 /tr "'C:\blocksavesperfMonitorDll\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Users\Public\Downloads\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Public\Downloads\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 13 /tr "'C:\Users\Public\Downloads\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\MSOCache\All Users\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1356

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\blocksavesperfMonitorDll\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\blocksavesperfMonitorDll\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 12 /tr "'C:\blocksavesperfMonitorDll\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:780

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1208

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Media Player\es-ES\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\es-ES\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2220

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Media Player\es-ES\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1540

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:\Users\Admin\AppData\Local\Temp\kendalcp.exe

Filesize
1.1MB

MD5
0d015cc111d53a019e680b0bed11fcad

SHA1
3b3fb6eeba0c2ba286a4db5e850697399ccb5e36

SHA256
2b7365d9634016b0483009225b959692c290a6b17fad133e42434dc89fdf4150

SHA512
c3a7ea551d0151033dde83a3dda1042e8fe26702c84da2b630ecffb739aecb654730bb5f7ec8914189f72ca7d0ecf1352f0ca7effa938bc1d6f0ae56c3358eab

Download Submit
C:\blocksavesperfMonitorDll\R7uOS4kiQeNNM8oo5bGADNHtfWe.vbe

Filesize
222B

MD5
a6f295a2e58c722b5935cc905e81fd8b

SHA1
a2a30408197320a639e3e2f18a57fc8578c97b58

SHA256
8bcebca170fc0768cb1afb63f1350d63c3a295b26ca04602e07ec43498b9691c

SHA512
839605d7eadcdc470dd4edd117cedd976cb9f36bf0a636d08afecc6378adadf0fccb80beb44de849b6dfec814845cef8ca83ca171b39c1f6d90d55485bd06635

Download Submit
C:\blocksavesperfMonitorDll\SAymW4LctOmWulF1E6221.bat

Filesize
43B

MD5
7c582abd8874b9cc60df72d62bd86440

SHA1
564e7b01338d08f657f2c02fa8fc5b8dadb92331

SHA256
c5e95b783c6ec1b98a40edf8663370c678de43e9b657e09ca1f054618277b329

SHA512
444cf67666329ea359e221560a229990013af07d1ed074b2406e903c7ee04cf279953ad0726a96c2ca875216da68369dfdde00f905adf1de9ed93b8582bf8828

Download Submit
C:\blocksavesperfMonitorDll\reviewDll.exe

Filesize
828KB

MD5
d9dac9e1d95e84e6aec084cf2ddb3f3a

SHA1
a231a41c7ad994879b15116dcea41fdc09bb5879

SHA256
0fbeb71fb1dfe793eace5ed167f035a8f4bcc6b56d0930b6b97481f2b222b1d5

SHA512
c4aa115de6f61c7311e8654d40537cd1ce08f0fb7efd0a225a42e06ad000ed420ba905e5cc26a19cb56af951ee1441aa257c073c47911a72fff733c0db1c2f9a

Download Submit
memory/1340-45-0x0000000001260000-0x0000000001336000-memory.dmp

Filesize
856KB

Download
memory/2120-0-0x000007FEF5693000-0x000007FEF5694000-memory.dmp

Filesize
4KB

Download
memory/2120-1-0x0000000000D60000-0x0000000000DFE000-memory.dmp

Filesize
632KB

Download
memory/2120-7-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

Filesize
9.9MB

Download
memory/2940-22-0x0000000000F40000-0x0000000001016000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads