dcrat | 74146ce7e5b14f6448572915ea28657f1f35c161876e38e4c953b81bca8696b2

General

Target
23da28c4e7244ad5a01bca486fbf1d65.exe
Size 1.1MB
Sample240705-qsdnes1gqf
SHA256 74146ce7e5b14f6448572915ea28657f1f35c161876e38e4c953b81bca8696b2
MD5 23da28c4e7244ad5a01bca486fbf1d65
SHA1 e8691baebb1b904cd1a4c1ef08e3708c17e036ec
SHA512 d8b9353b6af572b660ce3115f491e6ff0e50414ef6c4411904f348d8dd179fc7c62aec27d4fcce127961043f8d328537322cf6ecff1da054b68ba28dfec03499
SSDEEP 24576:U2G/nvxW3Ww0tniAMLgZBb8IfRZ8pxHBfP0eMbFa/y:UbA30iLIVL8pxhp6V
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

dcrat 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 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	2396	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3120	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4924	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1992	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2812	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1648	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	532	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4404	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4816	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2704	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4656	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4384	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2464	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2980	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3208	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2836	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4936	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2016	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2420	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1608	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4072	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3988	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1972	3824	schtasks.exe	89
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3504	3824	schtasks.exe	89

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x00070000000234ba-10.dat	dcrat
behavioral2/memory/4032-13-0x00000000000C0000-0x0000000000196000-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-1-5-21-2547232018-1419253926-3356748848-1000\Control Panel\International\Geo\Nation	savesmonitor.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2547232018-1419253926-3356748848-1000\Control Panel\International\Geo\Nation	23da28c4e7244ad5a01bca486fbf1d65.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2547232018-1419253926-3356748848-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
4032	savesmonitor.exe
4940	RuntimeBroker.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Portable Devices\smss.exe	savesmonitor.exe
File created	C:\Program Files (x86)\Windows Portable Devices\69ddcba757bf72	savesmonitor.exe
File created	C:\Program Files\WindowsApps\wininit.exe	savesmonitor.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\diagnostics\index\taskhostw.exe	savesmonitor.exe

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

System Information Discovery
T1082

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2547232018-1419253926-3356748848-1000_Classes\Local Settings	23da28c4e7244ad5a01bca486fbf1d65.exe
Key created	\REGISTRY\USER\S-1-5-21-2547232018-1419253926-3356748848-1000_Classes\Local Settings	savesmonitor.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
4816	schtasks.exe
4656	schtasks.exe
4384	schtasks.exe
3208	schtasks.exe
1972	schtasks.exe
4404	schtasks.exe
532	schtasks.exe
2464	schtasks.exe
2812	schtasks.exe
2836	schtasks.exe
4936	schtasks.exe
2016	schtasks.exe
2420	schtasks.exe
1608	schtasks.exe
3988	schtasks.exe
3504	schtasks.exe
2396	schtasks.exe
4924	schtasks.exe
1992	schtasks.exe
1648	schtasks.exe
2704	schtasks.exe
2980	schtasks.exe
4072	schtasks.exe
3120	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4032	savesmonitor.exe
4032	savesmonitor.exe
4032	savesmonitor.exe
4032	savesmonitor.exe
4032	savesmonitor.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe
4940	RuntimeBroker.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4940	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4032	savesmonitor.exe
Token: SeDebugPrivilege	4940	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4684 wrote to memory of 3936	4684	23da28c4e7244ad5a01bca486fbf1d65.exe	85
PID 4684 wrote to memory of 3936	4684	23da28c4e7244ad5a01bca486fbf1d65.exe	85
PID 4684 wrote to memory of 3936	4684	23da28c4e7244ad5a01bca486fbf1d65.exe	85
PID 3936 wrote to memory of 2428	3936	WScript.exe	86
PID 3936 wrote to memory of 2428	3936	WScript.exe	86
PID 3936 wrote to memory of 2428	3936	WScript.exe	86
PID 2428 wrote to memory of 4032	2428	cmd.exe	88
PID 2428 wrote to memory of 4032	2428	cmd.exe	88
PID 4032 wrote to memory of 384	4032	savesmonitor.exe	114
PID 4032 wrote to memory of 384	4032	savesmonitor.exe	114
PID 384 wrote to memory of 4848	384	cmd.exe	116
PID 384 wrote to memory of 4848	384	cmd.exe	116
PID 384 wrote to memory of 4940	384	cmd.exe	117
PID 384 wrote to memory of 4940	384	cmd.exe	117

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\23da28c4e7244ad5a01bca486fbf1d65.exe
"C:\Users\Admin\AppData\Local\Temp\23da28c4e7244ad5a01bca486fbf1d65.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4684
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\portComponenthostcommon\csororMRWqKHCeyVGrLT4ODzVElXhp.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3936
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\portComponenthostcommon\jJBxMiEy855XbWerIlP.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2428
  - - C:\portComponenthostcommon\savesmonitor.exe
      "C:\portComponenthostcommon\savesmonitor.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Program Files directory
      Drops file in Windows directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4032
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1V33NsCBOr.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:384
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:4848
      - C:\Recovery\WindowsRE\RuntimeBroker.exe
        
        "C:\Recovery\WindowsRE\RuntimeBroker.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:4940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2396

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3120

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\unsecapp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Users\Default User\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2812

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Portable Devices\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Portable Devices\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4384

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\WindowsHolographicDevices\SpatialStore\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2464

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Users\All Users\WindowsHolographicDevices\SpatialStore\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\WindowsHolographicDevices\SpatialStore\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3208

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\portComponenthostcommon\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\portComponenthostcommon\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4936

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\portComponenthostcommon\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\portComponenthostcommon\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2420

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\portComponenthostcommon\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\portComponenthostcommon\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4072

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3504

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

1V33NsCBOr.bat

Path C:\Users\Admin\AppData\Local\Temp\1V33NsCBOr.bat
Size 204B
SHA256 5aeaaa2ecd8578214a8afa43393a3e6e475840c665c36fb40e1f9681f168ba64
MD5 dfe478af32f3540e9bc8d648ae2093f8
SHA1 f84453ffd835d37401ade80f1fbb701edff209cc
SHA512 9397fdef0f746562a43390e6c30a54df166ef1895446555126d1c5320a0c8a2d443a2cd50d9a4041375da791454a3f5f20ad50f6311a442c34b5ee82538dd81d
MD5 SHA1 SHA512

Submit Download

csororMRWqKHCeyVGrLT4ODzVElXhp.vbe

Path C:\portComponenthostcommon\csororMRWqKHCeyVGrLT4ODzVElXhp.vbe
Size 219B
SHA256 1049c71fadf851b5a212b2a1b5b3c9b213b422f14bda027f435166542c999773
MD5 f37a7ec55b9accdbe5fb943a8203118e
SHA1 f8fbcfde976eea093fef8d03756a20f2d3aaf876
SHA512 460a8721821d653784eed1883844e9a91bd14ac78b838dc884792baac2add51d1e2230c89860418245b121515d90f817c0a3c208b50f87f3d2e5e46581d2efd8
MD5 SHA1 SHA512

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jJBxMiEy855XbWerIlP.bat

Path C:\portComponenthostcommon\jJBxMiEy855XbWerIlP.bat
Size 45B
SHA256 12ca0bf88523b11ab0f26615aa1f356729fb73cc045146b53e3ead57bde5285f
MD5 b6eb4ace92e0d3d484d2fd9f2a3a8273
SHA1 a04505e65a99fbdbe965c63a09de6a564a237b20
SHA512 427390745b2e37c6cc5b17d0fc87a315f41db1d5f4fe17386650a5d457656d53f7ad15ee19ecb9194bcd8e885c36334167e16020711054abad319fc6bf91c9f6
MD5 SHA1 SHA512

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savesmonitor.exe

Path C:\portComponenthostcommon\savesmonitor.exe
Size 827KB
SHA256 dc8f4cbee11b4c516efa0091015e9f9d7a3643cb0335029687780ee313668053
MD5 757f10931f034e84725db1960591ef08
SHA1 8c6f9bf2e63c2347dd8a4dbdf885b6e3d598dfc7
SHA512 761780b10eb17d7db7e9847ae0b33711ae3ff51b720a7845baa0e2efeeb5627371747249d9140866962b197a29b62db3dfa33fce752f9b64ca7749dbcf1f6ab7
SSDEEP 12288:xsBJAMLgZT4ib8IfRiO8pIwNCXI1BBftd0e9hgbF6h/:xiAMLgZBb8IfRZ8pxHBfP0eMbFa/
MD5 SHA1 SHA512 SSDEEP

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memory/4032-12-0x00007FFEFA893000-0x00007FFEFA895000-memory.dmp

Download

memory/4032-13-0x00000000000C0000-0x0000000000196000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads