dcrat | 87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d

General

Target

87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.exe
Size

1.1MB
MD5

5216ca61384f1d0eaa9b873e0b756f0b
SHA1

c29692709f869ebc5743f561c8f3975b2a2d5ae9
SHA256

87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d
SHA512

8dce4092b5a9c10309228a55f0a9a6d3508eae2f1f8bf26e2196f4426398d35d2618cc001d5665be5b24cfb138c46153c74b3b56e37d26e8ec7b8c0ebbd11758
SSDEEP

24576:U2G/nvxW3Ww0t7EJyn5ySinOYEI09IlOmLdRz4:UbA307EJ3tEI06Rs

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 18 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	2760	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2080	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2772	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2636	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2660	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2608	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2688	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2348	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2500	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	684	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1120	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2956	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2020	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	976	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	484	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2892	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2944	2860	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1064	2860	schtasks.exe	34

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000800000001746a-9.dat	dcrat
behavioral1/memory/2216-13-0x0000000000040000-0x0000000000116000-memory.dmp	dcrat
behavioral1/memory/2984-32-0x0000000000C70000-0x0000000000D46000-memory.dmp	dcrat

Executes dropped EXE 2 IoCs

pid	Process
2216	MsWebfont.exe
2984	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
2556	cmd.exe
2556	cmd.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Mozilla Maintenance Service\logs\WmiPrvSE.exe	MsWebfont.exe
File created	C:\Program Files (x86)\Mozilla Maintenance Service\logs\24dbde2999530e	MsWebfont.exe
File created	C:\Program Files\Microsoft Games\Solitaire\es-ES\lsass.exe	MsWebfont.exe
File created	C:\Program Files\Microsoft Games\Solitaire\es-ES\6203df4a6bafc7	MsWebfont.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	87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.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 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2892	schtasks.exe
2760	schtasks.exe
2080	schtasks.exe
2772	schtasks.exe
2956	schtasks.exe
2608	schtasks.exe
484	schtasks.exe
2944	schtasks.exe
1064	schtasks.exe
2636	schtasks.exe
2500	schtasks.exe
1120	schtasks.exe
976	schtasks.exe
2020	schtasks.exe
2660	schtasks.exe
2688	schtasks.exe
2348	schtasks.exe
684	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2216	MsWebfont.exe
2216	MsWebfont.exe
2216	MsWebfont.exe
2984	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2216	MsWebfont.exe
Token: SeDebugPrivilege	2984	csrss.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2408 wrote to memory of 1452	2408	87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.exe	30
PID 2408 wrote to memory of 1452	2408	87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.exe	30
PID 2408 wrote to memory of 1452	2408	87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.exe	30
PID 2408 wrote to memory of 1452	2408	87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.exe	30
PID 1452 wrote to memory of 2556	1452	WScript.exe	31
PID 1452 wrote to memory of 2556	1452	WScript.exe	31
PID 1452 wrote to memory of 2556	1452	WScript.exe	31
PID 1452 wrote to memory of 2556	1452	WScript.exe	31
PID 2556 wrote to memory of 2216	2556	cmd.exe	33
PID 2556 wrote to memory of 2216	2556	cmd.exe	33
PID 2556 wrote to memory of 2216	2556	cmd.exe	33
PID 2556 wrote to memory of 2216	2556	cmd.exe	33
PID 2216 wrote to memory of 2984	2216	MsWebfont.exe	53
PID 2216 wrote to memory of 2984	2216	MsWebfont.exe	53
PID 2216 wrote to memory of 2984	2216	MsWebfont.exe	53

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\87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.exe
"C:\Users\Admin\AppData\Local\Temp\87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2408
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Msdhcp\kYflM234aT9Hkuk3JQCzywjVnA9.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1452
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Msdhcp\tQvStNv.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2556
  - - C:\Msdhcp\MsWebfont.exe
      "C:\Msdhcp\MsWebfont.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2216
    - - C:\Msdhcp\csrss.exe
        
        "C:\Msdhcp\csrss.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Msdhcp\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Msdhcp\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2080

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Msdhcp\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2772

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\csrss.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 "WmiPrvSEW" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\WmiPrvSE.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2348

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2500

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 13 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1120

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 14 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2956

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Users\Public\Downloads\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2020

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Public\Downloads\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 5 /tr "'C:\Users\Public\Downloads\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Program Files\Microsoft Games\Solitaire\es-ES\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2892

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Microsoft Games\Solitaire\es-ES\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Program Files\Microsoft Games\Solitaire\es-ES\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1064

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

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Downloads

C:\Msdhcp\kYflM234aT9Hkuk3JQCzywjVnA9.vbe

Filesize
190B

MD5
4879ca936544d01129cb0dec0b708d3d

SHA1
53122a833a136039a3c3ace69fff24fb10e6e6c5

SHA256
3db689b9b2dbb3730a26f8b7a4d9e9724aac2c24810015e41c1b5ba73681a724

SHA512
8097473a86ed3d72fe70ae1fe269f217632a36d27f074ba4317fd98d529cd390ee6c890e560a8728e386158b8ea83d3f6c1d9a739dbe282e7e0bac1052b7e47c

Download Submit
C:\Msdhcp\tQvStNv.bat

Filesize
25B

MD5
1b3f947bdc497eb9f7fa4d4f975e3354

SHA1
c3114bc2b359b592dda481bf881c64b45d15c641

SHA256
2e71a1366a0e31635d8c67f168aeefe58eaed85aaf91762c52d2da837232f4d3

SHA512
8552c68c08ce5f70c8d8b8e360dfdf607142684fa046d1c434207d07cbf5a6262ff5d8b505ce8413d76da7e5954db4fd7d9f15bea7fe367ad2d0a731a2983ded

Download Submit
\Msdhcp\MsWebfont.exe

Filesize
827KB

MD5
ec7c50f1bebb1402b88fa756af1b3f4c

SHA1
82e1c02d54d7212efe8c6cdb40b811a134900bf0

SHA256
9d96e194f9c8eaae557943041df2f29f88a4557b4f2e79b2d89a149ad8e93ab1

SHA512
97bb7773be2d5471ba49914f2ab698e4c0142a001cd5fface4fca189cea22cb77c856bd314d97b574216e756219a72c541efa7084ffdbb924a2b578c3aa1bf02

Download Submit
memory/2216-13-0x0000000000040000-0x0000000000116000-memory.dmp

Filesize
856KB

Download
memory/2984-32-0x0000000000C70000-0x0000000000D46000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads