dcrat | 0993c5335a17f17141e1be3f1936fa420e69c33bebedcd39d01bc527f6cd7d96

General

Target

5614b417cca4217b0a1a4a4a081f9f43.exe
Size

831KB
MD5

5614b417cca4217b0a1a4a4a081f9f43
SHA1

6597f30054da2fcea4f5c37121a0581b1a93781b
SHA256

0993c5335a17f17141e1be3f1936fa420e69c33bebedcd39d01bc527f6cd7d96
SHA512

bed2ed22e5759aa7d4beac74d0b3cfaf7a045c70dc3ab97c490b978a365b741fd6257a64cf3cdf3f0653febd1176cd5278e57347dbc11d55c9513aa2c7777e12
SSDEEP

12288:xmhMcbVbcxC9wcb8QyKJT2ediDP78OK1CALBuMOh7x:xmRVbcxCWKyKJT2Z4xi

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 15 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	1072	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4464	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4876	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4660	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2680	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3476	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1612	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5032	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4980	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4728	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1064	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	640	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3148	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3800	4548	schtasks.exe	84
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	768	4548	schtasks.exe	84

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1660-1-0x00000000002E0000-0x00000000003B8000-memory.dmp	dcrat
behavioral2/files/0x00070000000234dc-11.dat	dcrat

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 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	5614b417cca4217b0a1a4a4a081f9f43.exe

Executes dropped EXE 1 IoCs

pid	Process
4592	RuntimeBroker.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
30	pastebin.com
31	pastebin.com

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Mozilla Firefox\browser\VisualElements\27d1bcfc3c54e0	5614b417cca4217b0a1a4a4a081f9f43.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\smss.exe	5614b417cca4217b0a1a4a4a081f9f43.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\69ddcba757bf72	5614b417cca4217b0a1a4a4a081f9f43.exe
File created	C:\Program Files\Mozilla Firefox\browser\VisualElements\System.exe	5614b417cca4217b0a1a4a4a081f9f43.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000_Classes\Local Settings	5614b417cca4217b0a1a4a4a081f9f43.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4464	schtasks.exe
4876	schtasks.exe
3800	schtasks.exe
768	schtasks.exe
2680	schtasks.exe
4980	schtasks.exe
3148	schtasks.exe
1072	schtasks.exe
4660	schtasks.exe
5032	schtasks.exe
4728	schtasks.exe
640	schtasks.exe
3476	schtasks.exe
1612	schtasks.exe
1064	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
1660	5614b417cca4217b0a1a4a4a081f9f43.exe
4592	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1660	5614b417cca4217b0a1a4a4a081f9f43.exe
Token: SeDebugPrivilege	4592	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 2848	1660	5614b417cca4217b0a1a4a4a081f9f43.exe	100
PID 1660 wrote to memory of 2848	1660	5614b417cca4217b0a1a4a4a081f9f43.exe	100
PID 2848 wrote to memory of 3020	2848	cmd.exe	102
PID 2848 wrote to memory of 3020	2848	cmd.exe	102
PID 2848 wrote to memory of 4592	2848	cmd.exe	109
PID 2848 wrote to memory of 4592	2848	cmd.exe	109

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\5614b417cca4217b0a1a4a4a081f9f43.exe
"C:\Users\Admin\AppData\Local\Temp\5614b417cca4217b0a1a4a4a081f9f43.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1UeGdALQqr.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2848
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:3020
- - C:\Users\Default\Documents\RuntimeBroker.exe
    "C:\Users\Default\Documents\RuntimeBroker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Documents\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1072

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Default\Documents\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4464

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Users\Default\Documents\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Program Files\Microsoft Office\PackageManifests\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\PackageManifests\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Program Files\Microsoft Office\PackageManifests\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Default User\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5614b417cca4217b0a1a4a4a081f9f435" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\5614b417cca4217b0a1a4a4a081f9f43.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5614b417cca4217b0a1a4a4a081f9f43" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\5614b417cca4217b0a1a4a4a081f9f43.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "5614b417cca4217b0a1a4a4a081f9f435" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\5614b417cca4217b0a1a4a4a081f9f43.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Program Files\Mozilla Firefox\browser\VisualElements\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\browser\VisualElements\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3800

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Program Files\Mozilla Firefox\browser\VisualElements\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:768

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Program Files\Mozilla Firefox\browser\VisualElements\System.exe

Filesize
831KB

MD5
5614b417cca4217b0a1a4a4a081f9f43

SHA1
6597f30054da2fcea4f5c37121a0581b1a93781b

SHA256
0993c5335a17f17141e1be3f1936fa420e69c33bebedcd39d01bc527f6cd7d96

SHA512
bed2ed22e5759aa7d4beac74d0b3cfaf7a045c70dc3ab97c490b978a365b741fd6257a64cf3cdf3f0653febd1176cd5278e57347dbc11d55c9513aa2c7777e12

Download Submit
C:\Users\Admin\AppData\Local\Temp\1UeGdALQqr.bat

Filesize
209B

MD5
0045aa2fad12a0ab69ff15f46a654b9f

SHA1
d2183da6e53ff9579eb0e5a49e1c35244835b8f0

SHA256
e0cdcd5b3d2cbc26ceb9b8289811dd7e133f965a10594f7b43cbcd0ede937a94

SHA512
65aa08a8c77d47910a8686d3df26a74628b3b6428afde835023a8c825d58b1e101a8d029482c0728d0f72df75458cf3ffd9294c2e1ffe8dfebe8c93dc5aee7ae

Download Submit
memory/1660-0-0x00007FF810C13000-0x00007FF810C15000-memory.dmp

Filesize
8KB

Download
memory/1660-1-0x00000000002E0000-0x00000000003B8000-memory.dmp

Filesize
864KB

Download
memory/1660-4-0x00007FF810C10000-0x00007FF8116D1000-memory.dmp

Filesize
10.8MB

Download
memory/1660-19-0x00007FF810C10000-0x00007FF8116D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads