dcrat | be5c49fa94be78520ee83ed6230a80aaf0ae9dd4bb2d6053aa8f843131f2f506

General

Target

EXECUTOR METEOR .exe
Size

1.1MB
MD5

e5be94d6e847bb7656e80201cacf67fb
SHA1

cc1ce69eea609b5fc9ff18f09407b934690bcff3
SHA256

be5c49fa94be78520ee83ed6230a80aaf0ae9dd4bb2d6053aa8f843131f2f506
SHA512

306c26f1e72a32c479b8d9112e2e0c5d22fd0e46b02ae5fa7ffff51191c9d79a52a2dbe7d200e0dc9cccf0919cba3693905c8b2dc6c6fc8f3d7eaf883e388100
SSDEEP

24576:U2G/nvxW3Ww0tiUfTyqyg1hIZ9XWp7wJO:UbA30L+ixx

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 6 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	1840	4424	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1172	4424	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1816	4424	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3424	4424	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1256	4424	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5012	4424	schtasks.exe	85

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral4/files/0x0028000000045056-13.dat	dcrat
behavioral4/memory/2776-16-0x0000000000960000-0x0000000000A36000-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-1-5-21-584106483-899802418-1877852863-1000\Control Panel\International\Geo\Nation	EXECUTOR METEOR .exe
Key value queried	\REGISTRY\USER\S-1-5-21-584106483-899802418-1877852863-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-584106483-899802418-1877852863-1000\Control Panel\International\Geo\Nation	surrogateRuntime.exe

Executes dropped EXE 6 IoCs

pid	Process
2776	surrogateRuntime.exe
3764	upfc.exe
1924	upfc.exe
2704	fontdrvhost.exe
1224	upfc.exe
4792	fontdrvhost.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\bcastdvr\fontdrvhost.exe	surrogateRuntime.exe
File created	C:\Windows\bcastdvr\5b884080fd4f94	surrogateRuntime.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	EXECUTOR METEOR .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 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-584106483-899802418-1877852863-1000_Classes\Local Settings	EXECUTOR METEOR .exe

Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1840	schtasks.exe
1172	schtasks.exe
1816	schtasks.exe
3424	schtasks.exe
1256	schtasks.exe
5012	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2776	surrogateRuntime.exe
3764	upfc.exe
3764	upfc.exe
3764	upfc.exe
3764	upfc.exe
3764	upfc.exe
3764	upfc.exe
3764	upfc.exe
3764	upfc.exe
3764	upfc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3764	upfc.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2776	surrogateRuntime.exe
Token: SeDebugPrivilege	3764	upfc.exe
Token: SeDebugPrivilege	1924	upfc.exe
Token: SeDebugPrivilege	2704	fontdrvhost.exe
Token: SeDebugPrivilege	1224	upfc.exe
Token: SeDebugPrivilege	4792	fontdrvhost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 4952	4936	EXECUTOR METEOR .exe	81
PID 4936 wrote to memory of 4952	4936	EXECUTOR METEOR .exe	81
PID 4936 wrote to memory of 4952	4936	EXECUTOR METEOR .exe	81
PID 4952 wrote to memory of 400	4952	WScript.exe	89
PID 4952 wrote to memory of 400	4952	WScript.exe	89
PID 4952 wrote to memory of 400	4952	WScript.exe	89
PID 400 wrote to memory of 2776	400	cmd.exe	91
PID 400 wrote to memory of 2776	400	cmd.exe	91
PID 2776 wrote to memory of 3764	2776	surrogateRuntime.exe	98
PID 2776 wrote to memory of 3764	2776	surrogateRuntime.exe	98

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\EXECUTOR METEOR .exe
"C:\Users\Admin\AppData\Local\Temp\EXECUTOR METEOR .exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\comReviewrefPerf\Elw8H.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4952
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\comReviewrefPerf\8WD994.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:400
  - - C:\comReviewrefPerf\surrogateRuntime.exe
      "C:\comReviewrefPerf\surrogateRuntime.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2776
    - - C:\comReviewrefPerf\upfc.exe
        
        "C:\comReviewrefPerf\upfc.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:3764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 12 /tr "'C:\comReviewrefPerf\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1840

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\comReviewrefPerf\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1172

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 12 /tr "'C:\comReviewrefPerf\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Windows\bcastdvr\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3424

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\bcastdvr\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1256

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\Windows\bcastdvr\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5012

C:\comReviewrefPerf\upfc.exe
"C:\comReviewrefPerf\upfc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1924

C:\Windows\bcastdvr\fontdrvhost.exe
"C:\Windows\bcastdvr\fontdrvhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2704

C:\comReviewrefPerf\upfc.exe
"C:\comReviewrefPerf\upfc.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1224

C:\Windows\bcastdvr\fontdrvhost.exe
"C:\Windows\bcastdvr\fontdrvhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4792

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:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\upfc.exe.log

Filesize
1KB

MD5
b08c36ce99a5ed11891ef6fc6d8647e9

SHA1
db95af417857221948eb1882e60f98ab2914bf1d

SHA256
cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674

SHA512
07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

Download Submit
C:\comReviewrefPerf\8WD994.bat

Filesize
42B

MD5
ff1d6e65d0b458accf2d7e9cf078f012

SHA1
4a7a0831b061ce2c72dfe5dbb8d3e06ef48fb9c4

SHA256
2a3d5e93e6c1c94626f81d252cf9e831a94337a8fc871efa3560fbe966e35580

SHA512
1888c69ad30ab13f71aee80de86aaebb04c1ee7b08bc4f8f5e41dc325399cdc1c3bb956d9401ea6c51b425305d2835fffcae60fc4b8644fab255c03f37431d15

Download Submit
C:\comReviewrefPerf\Elw8H.vbe

Filesize
200B

MD5
a44fada9f313e0d6008aef960aeae861

SHA1
9217e79ff49d67baca484f5a5e9418cca3fb9b2e

SHA256
1e5c949fd2059fda331f7cd178a359f2ac4d4dd8cdae76543f21493b2ffb9d44

SHA512
800052e7c0cd62433bde0084b94ac3b44ddece5adc144c8e02a2e7dc8629b683ac3a94c6218bf61a595731d2dc1adf596c5bf101fc2d9c3723c3a099d2c853f7

Download Submit
C:\comReviewrefPerf\surrogateRuntime.exe

Filesize
828KB

MD5
422e6efd4d4c62a97c78be894b85a535

SHA1
6de90977b41153d67fdca7a9119edf382d7e5414

SHA256
fddbbd909aeb6e9466e3c926f7773f23f84d392604a2619caa3f5a4c9d63eb8c

SHA512
1c545785df5e6be6b1142adb94cc6779020d409fddd429743eb69646b35a7acafadb2445218445bbc7e5c02171f1b531d9a7c623d834c18dd49161708529d388

Download Submit
memory/2776-15-0x00007FF846833000-0x00007FF846835000-memory.dmp

Filesize
8KB

Download
memory/2776-16-0x0000000000960000-0x0000000000A36000-memory.dmp

Filesize
856KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads