dcrat | 87a4b8833cd4cb394e3b19b1672491575466fe8b0afb935b7d9363a1cbaca59d

General

Target

5216ca61384f1d0eaa9b873e0b756f0b.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	3696	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	208	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2868	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1456	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4892	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2428	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1856	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4904	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4336	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1720	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4852	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3952	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3508	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1980	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4372	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3972	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	224	1436	schtasks.exe	94
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4288	1436	schtasks.exe	94

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x000a000000023b78-10.dat	dcrat
behavioral2/memory/1252-13-0x0000000000F20000-0x0000000000FF6000-memory.dmp	dcrat

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	MsWebfont.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	5216ca61384f1d0eaa9b873e0b756f0b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
1252	MsWebfont.exe
3196	smss.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Defender\de-DE\RuntimeBroker.exe	MsWebfont.exe
File opened for modification	C:\Program Files (x86)\Windows Defender\de-DE\RuntimeBroker.exe	MsWebfont.exe
File created	C:\Program Files (x86)\Windows Defender\de-DE\9e8d7a4ca61bd9	MsWebfont.exe
File created	C:\Program Files (x86)\Windows Defender\es-ES\cmd.exe	MsWebfont.exe
File created	C:\Program Files (x86)\Windows Defender\es-ES\ebf1f9fa8afd6d	MsWebfont.exe
File created	C:\Program Files (x86)\Windows Defender\de-DE\smss.exe	MsWebfont.exe
File created	C:\Program Files (x86)\Windows Defender\de-DE\69ddcba757bf72	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5216ca61384f1d0eaa9b873e0b756f0b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	5216ca61384f1d0eaa9b873e0b756f0b.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
4904	schtasks.exe
4372	schtasks.exe
3972	schtasks.exe
208	schtasks.exe
4852	schtasks.exe
4288	schtasks.exe
4892	schtasks.exe
2868	schtasks.exe
2428	schtasks.exe
3508	schtasks.exe
1980	schtasks.exe
224	schtasks.exe
3696	schtasks.exe
1856	schtasks.exe
4336	schtasks.exe
1720	schtasks.exe
3952	schtasks.exe
1456	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1252	MsWebfont.exe
1252	MsWebfont.exe
1252	MsWebfont.exe
3196	smss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1252	MsWebfont.exe
Token: SeDebugPrivilege	3196	smss.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 2656	1612	5216ca61384f1d0eaa9b873e0b756f0b.exe	85
PID 1612 wrote to memory of 2656	1612	5216ca61384f1d0eaa9b873e0b756f0b.exe	85
PID 1612 wrote to memory of 2656	1612	5216ca61384f1d0eaa9b873e0b756f0b.exe	85
PID 2656 wrote to memory of 2704	2656	WScript.exe	91
PID 2656 wrote to memory of 2704	2656	WScript.exe	91
PID 2656 wrote to memory of 2704	2656	WScript.exe	91
PID 2704 wrote to memory of 1252	2704	cmd.exe	93
PID 2704 wrote to memory of 1252	2704	cmd.exe	93
PID 1252 wrote to memory of 3196	1252	MsWebfont.exe	115
PID 1252 wrote to memory of 3196	1252	MsWebfont.exe	115

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\5216ca61384f1d0eaa9b873e0b756f0b.exe
"C:\Users\Admin\AppData\Local\Temp\5216ca61384f1d0eaa9b873e0b756f0b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Msdhcp\kYflM234aT9Hkuk3JQCzywjVnA9.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2656
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Msdhcp\tQvStNv.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2704
  - - C:\Msdhcp\MsWebfont.exe
      "C:\Msdhcp\MsWebfont.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1252
    - - C:\Program Files (x86)\Windows Defender\de-DE\smss.exe
        
        "C:\Program Files (x86)\Windows Defender\de-DE\smss.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3196

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Defender\de-DE\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\de-DE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:208

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Defender\de-DE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\es-ES\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1456

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\es-ES\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4892

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\es-ES\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2428

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 11 /tr "'C:\Msdhcp\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Msdhcp\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\Msdhcp\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4336

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Users\Public\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Public\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Users\Public\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3952

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Defender\de-DE\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3508

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\de-DE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Defender\de-DE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4372

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:224

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4288

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

2

T1012

System Information Discovery

2

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\MsWebfont.exe

Filesize
827KB

MD5
ec7c50f1bebb1402b88fa756af1b3f4c

SHA1
82e1c02d54d7212efe8c6cdb40b811a134900bf0

SHA256
9d96e194f9c8eaae557943041df2f29f88a4557b4f2e79b2d89a149ad8e93ab1

SHA512
97bb7773be2d5471ba49914f2ab698e4c0142a001cd5fface4fca189cea22cb77c856bd314d97b574216e756219a72c541efa7084ffdbb924a2b578c3aa1bf02

Download Submit
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
memory/1252-12-0x00007FFECF973000-0x00007FFECF975000-memory.dmp

Filesize
8KB

Download
memory/1252-13-0x0000000000F20000-0x0000000000FF6000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads