dcrat | 2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf

General

Target

2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe
Size

1.1MB
MD5

4f486217bd3e8bef8a8ba6c89f9f4ee3
SHA1

685829b39898a12fcddb60625c528885033043a3
SHA256

2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf
SHA512

7dd9bfca5c791e4a7821b6d2d9e04408530bfbcaf03a21a5d9daf1b85ac00c15a625f843cc49239366f2d15a3dbbd4b8e6442ec41331c87cdbdd7221693b6244
SSDEEP

24576:U2G/nvxW3Ww0t0uNRedfgl+rRBPwFqemEUcg4:UbA3002BKjAq5Q

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

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	1268	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4544	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5000	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2512	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3744	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4360	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2444	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2092	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1552	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4144	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5072	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	868	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4636	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1084	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5084	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1740	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	816	2492	schtasks.exe	92
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5016	2492	schtasks.exe	92

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x00070000000234a6-10.dat	dcrat
behavioral2/memory/4368-13-0x0000000000200000-0x00000000002D6000-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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	blockproviderPerf.exe

Executes dropped EXE 2 IoCs

pid	Process
4368	blockproviderPerf.exe
1844	cmd.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Mail\cmd.exe	blockproviderPerf.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\cmd.exe	blockproviderPerf.exe
File created	C:\Program Files (x86)\Windows Mail\ebf1f9fa8afd6d	blockproviderPerf.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	2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000_Classes\Local Settings	2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe
Key created	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000_Classes\Local Settings	blockproviderPerf.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
2092	schtasks.exe
4144	schtasks.exe
868	schtasks.exe
4544	schtasks.exe
5016	schtasks.exe
4636	schtasks.exe
1740	schtasks.exe
816	schtasks.exe
5072	schtasks.exe
5000	schtasks.exe
2512	schtasks.exe
3744	schtasks.exe
4360	schtasks.exe
2444	schtasks.exe
1552	schtasks.exe
1084	schtasks.exe
1268	schtasks.exe
5084	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4368	blockproviderPerf.exe
4368	blockproviderPerf.exe
4368	blockproviderPerf.exe
4368	blockproviderPerf.exe
4368	blockproviderPerf.exe
1844	cmd.exe
1844	cmd.exe
1844	cmd.exe
1844	cmd.exe
1844	cmd.exe
1844	cmd.exe
1844	cmd.exe
1844	cmd.exe
1844	cmd.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1844	cmd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4368	blockproviderPerf.exe
Token: SeDebugPrivilege	1844	cmd.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2920 wrote to memory of 3132	2920	2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe	85
PID 2920 wrote to memory of 3132	2920	2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe	85
PID 2920 wrote to memory of 3132	2920	2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe	85
PID 3132 wrote to memory of 452	3132	WScript.exe	96
PID 3132 wrote to memory of 452	3132	WScript.exe	96
PID 3132 wrote to memory of 452	3132	WScript.exe	96
PID 452 wrote to memory of 4368	452	cmd.exe	98
PID 452 wrote to memory of 4368	452	cmd.exe	98
PID 4368 wrote to memory of 372	4368	blockproviderPerf.exe	117
PID 4368 wrote to memory of 372	4368	blockproviderPerf.exe	117
PID 372 wrote to memory of 1848	372	cmd.exe	119
PID 372 wrote to memory of 1848	372	cmd.exe	119
PID 372 wrote to memory of 1844	372	cmd.exe	120
PID 372 wrote to memory of 1844	372	cmd.exe	120

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\2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe
"C:\Users\Admin\AppData\Local\Temp\2f49d5afa516d56f39663428ff111295df5dbddf2bbe6c64c049c67348cbcedf.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2920
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ServerDhcp\AQOMybq.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3132
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\ServerDhcp\VwXUKm0r1lmZiu0QP.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:452
  - - C:\ServerDhcp\blockproviderPerf.exe
      "C:\ServerDhcp\blockproviderPerf.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Program Files directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4368
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\0xb1FKji9F.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:372
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:1848
      - C:\Program Files (x86)\Windows Mail\cmd.exe
        
        "C:\Program Files (x86)\Windows Mail\cmd.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:1844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Mail\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1268

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4544

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Mail\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2512

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4360

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 11 /tr "'C:\ServerDhcp\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2444

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\ServerDhcp\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2092

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 12 /tr "'C:\ServerDhcp\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4144

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5072

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\TextInputHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Users\Default User\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5016

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:\ServerDhcp\AQOMybq.vbe

Filesize
205B

MD5
8314d8c2d53717584fed8b4b3271fba2

SHA1
2e10ec785f96b3c861b8cc0d062c779d0538fe21

SHA256
44daab539f79fedf94b57343b2066d79b9d26592f67d1129b773bd19c114d29e

SHA512
cdf5d7f9a119e4265b501f4df7ed2843290b93a0d51228b5099fb3f399972f91fb9e7ed2cac16d267926b8b89c5cfb7bbcbe9f14e9ebef2a09bce9dfdec10a5d

Download Submit
C:\ServerDhcp\VwXUKm0r1lmZiu0QP.bat

Filesize
37B

MD5
2790c1d05ce22b25e4ee541c721c5a6b

SHA1
8bd862c3cda6f3d86acfb44d58694fe0a7abcfb1

SHA256
df7b97921dd91e94a9ebe754ca8373b738a19b76e32edfdc5af784cfdfc7d236

SHA512
f81d44801a2150a65268efbdc473c1a00aff34faa225164dade1130a05883a605639e3d7266edcff557d54968857acd5527176f555ec6d10bff8958b712d91c4

Download Submit
C:\ServerDhcp\blockproviderPerf.exe

Filesize
827KB

MD5
73c1c41b9e71c48e752a5cd19fe808b6

SHA1
b8bd41a0b9dc7baef6eb01dfe6c852afdfaeed18

SHA256
fce441edb227275c5380194cc7a96a95998de6d75cd601b73bce1be529a68bd6

SHA512
f146a8917d39aa29d52386f5a23bbc01fbfade291d576782b5cc80b0ca363fa24fee80f00cf81ffa40e12503fedd203b422b7ad97dbb0d4500152e86d974cb38

Download Submit
C:\Users\Admin\AppData\Local\Temp\0xb1FKji9F.bat

Filesize
208B

MD5
8dce8f7c33d7d36122e0f31686c9d8e7

SHA1
07bc45e0270ce0ff3c23d5b454c5982e17e0070c

SHA256
32022df9ec3a4e81d06aa9a30110652e28bfd6ad6bddf4594377eca197d809e9

SHA512
3f2eb4bbd9ab29924206aa3001c963389bdf998acee6395b0dc43cf423e6b8b947c3f8ae3a7160756272ee99803055bc214e7b5b0911c68ffd46c0cca5b41809

Download Submit
memory/4368-12-0x00007FFE7D8A3000-0x00007FFE7D8A5000-memory.dmp

Filesize
8KB

Download
memory/4368-13-0x0000000000200000-0x00000000002D6000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads