dcrat | 785ebbdf0f15d1bb1fd3bbe1fb5a3486dead09dae463c91368653510c3814aee

General

Target

ad7507c90821598ae3ed6e8b6c3fdb36.exe
Size

1.3MB
MD5

ad7507c90821598ae3ed6e8b6c3fdb36
SHA1

b94839035eb055acacef724166489e2c0cb60eaa
SHA256

785ebbdf0f15d1bb1fd3bbe1fb5a3486dead09dae463c91368653510c3814aee
SHA512

ca43450c10e387a95ad6763e2f888096d7f87dc274bdb3f6720e4bc7fa3d214af72bc10a47f7ac2f00b44823511709ed1ad0f86201122bae3707c23463dff179

Score

10^/10

dcrat infostealer persistence rat spyware stealer suricata

Malware Config

Signatures

DcRat 5 IoCs

DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

rat infostealer dcrat

Processes:

ad7507c90821598ae3ed6e8b6c3fdb36.exeDriversavesRuntimecommonReviewrefbroker.exeschtasks.exeschtasks.exeschtasks.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	ad7507c90821598ae3ed6e8b6c3fdb36.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\DriversavesRuntimecommon\\SppExtComObj.exe\""	DriversavesRuntimecommonReviewrefbroker.exe
2932	schtasks.exe
3872	schtasks.exe
3676	schtasks.exe

Process spawned unexpected child process 3 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

schtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2932	464	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3872	464	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3676	464	schtasks.exe

suricata: ET MALWARE DCRAT Activity (GET)
suricata: ET MALWARE DCRAT Activity (GET)
suricata
Executes dropped EXE 2 IoCs

Processes:

DriversavesRuntimecommonReviewrefbroker.exespoolsv.exe

pid process

3768 DriversavesRuntimecommonReviewrefbroker.exe
2652 spoolsv.exe
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

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

Processes:

ad7507c90821598ae3ed6e8b6c3fdb36.exeWScript.exeDriversavesRuntimecommonReviewrefbroker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	ad7507c90821598ae3ed6e8b6c3fdb36.exe
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	DriversavesRuntimecommonReviewrefbroker.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

DriversavesRuntimecommonReviewrefbroker.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\DriversavesRuntimecommon\\SppExtComObj.exe\""	DriversavesRuntimecommonReviewrefbroker.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\adrclient\\spoolsv.exe\""	DriversavesRuntimecommonReviewrefbroker.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Registry = "\"C:\\Users\\Default User\\Registry.exe\""	DriversavesRuntimecommonReviewrefbroker.exe

Drops file in System32 directory 2 IoCs

Processes:

DriversavesRuntimecommonReviewrefbroker.exe

description	ioc	process
File created	C:\Windows\System32\adrclient\spoolsv.exe	DriversavesRuntimecommonReviewrefbroker.exe
File created	C:\Windows\System32\adrclient\f3b6ecef712a24	DriversavesRuntimecommonReviewrefbroker.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

2932 schtasks.exe
3872 schtasks.exe
3676 schtasks.exe

pid	process
2932	schtasks.exe
3872	schtasks.exe
3676	schtasks.exe

Modifies data under HKEY_USERS 41 IoCs

Processes:

WaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe

Modifies registry class 1 IoCs

Processes:

ad7507c90821598ae3ed6e8b6c3fdb36.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000_Classes\Local Settings	ad7507c90821598ae3ed6e8b6c3fdb36.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

DriversavesRuntimecommonReviewrefbroker.exespoolsv.exe

pid	process
3768	DriversavesRuntimecommonReviewrefbroker.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe
2652	spoolsv.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

spoolsv.exe

pid process

2652 spoolsv.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DriversavesRuntimecommonReviewrefbroker.exespoolsv.exe

description pid process

Token: SeDebugPrivilege 3768 DriversavesRuntimecommonReviewrefbroker.exe
Token: SeDebugPrivilege 2652 spoolsv.exe

pid	process
2652	spoolsv.exe

description	pid	process
Token: SeDebugPrivilege	3768	DriversavesRuntimecommonReviewrefbroker.exe
Token: SeDebugPrivilege	2652	spoolsv.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

ad7507c90821598ae3ed6e8b6c3fdb36.exeWScript.execmd.exeDriversavesRuntimecommonReviewrefbroker.exe

description	pid	process	target process
PID 3360 wrote to memory of 3436	3360	ad7507c90821598ae3ed6e8b6c3fdb36.exe	WScript.exe
PID 3360 wrote to memory of 3436	3360	ad7507c90821598ae3ed6e8b6c3fdb36.exe	WScript.exe
PID 3360 wrote to memory of 3436	3360	ad7507c90821598ae3ed6e8b6c3fdb36.exe	WScript.exe
PID 3360 wrote to memory of 3484	3360	ad7507c90821598ae3ed6e8b6c3fdb36.exe	WScript.exe
PID 3360 wrote to memory of 3484	3360	ad7507c90821598ae3ed6e8b6c3fdb36.exe	WScript.exe
PID 3360 wrote to memory of 3484	3360	ad7507c90821598ae3ed6e8b6c3fdb36.exe	WScript.exe
PID 3436 wrote to memory of 912	3436	WScript.exe	cmd.exe
PID 3436 wrote to memory of 912	3436	WScript.exe	cmd.exe
PID 3436 wrote to memory of 912	3436	WScript.exe	cmd.exe
PID 912 wrote to memory of 3768	912	cmd.exe	DriversavesRuntimecommonReviewrefbroker.exe
PID 912 wrote to memory of 3768	912	cmd.exe	DriversavesRuntimecommonReviewrefbroker.exe
PID 3768 wrote to memory of 2652	3768	DriversavesRuntimecommonReviewrefbroker.exe	spoolsv.exe
PID 3768 wrote to memory of 2652	3768	DriversavesRuntimecommonReviewrefbroker.exe	spoolsv.exe

C:\Users\Admin\AppData\Local\Temp\ad7507c90821598ae3ed6e8b6c3fdb36.exe
"C:\Users\Admin\AppData\Local\Temp\ad7507c90821598ae3ed6e8b6c3fdb36.exe"
1⤵
- DcRat
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3360

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\DriversavesRuntimecommon\OkPX18dWDtVLA0gJUAYq8tEymJIvb.vbe"
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3436

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\DriversavesRuntimecommon\i8SeDW7.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:912

C:\DriversavesRuntimecommon\DriversavesRuntimecommonReviewrefbroker.exe
"C:\DriversavesRuntimecommon\DriversavesRuntimecommonReviewrefbroker.exe"
4⤵
- DcRat
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3768

C:\Windows\System32\adrclient\spoolsv.exe
"C:\Windows\System32\adrclient\spoolsv.exe"
5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:2652

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\DriversavesRuntimecommon\file.vbs"
2⤵
PID:3484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\DriversavesRuntimecommon\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2932

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\adrclient\spoolsv.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Users\Default User\Registry.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3676

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 79fb6385a1be29e4a75d9bad96454fec M47BRkgQTUyhsRmoBvSRng.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:3412

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

2

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\DriversavesRuntimecommon\DriversavesRuntimecommonReviewrefbroker.exe
MD5
8daa2fddfdf7939d8f6af197a459086b

SHA1
d8b3ade8c8f097cdcfc6e42c8a33f09d21fdf89b

SHA256
f135db9a52b92622d288181553661b0e3ab9338c3f86173f906ff58acdbb8a9e

SHA512
4c30dfb40aab28bb3972f165370ffdc3f6e9c3e8039d9659c717e5cb1fd33266d31f3fb030449a57f48796c9190186480daf832ed5dff42579278bb9dbcd8cc5

Download Submit
C:\DriversavesRuntimecommon\DriversavesRuntimecommonReviewrefbroker.exe
MD5
8daa2fddfdf7939d8f6af197a459086b

SHA1
d8b3ade8c8f097cdcfc6e42c8a33f09d21fdf89b

SHA256
f135db9a52b92622d288181553661b0e3ab9338c3f86173f906ff58acdbb8a9e

SHA512
4c30dfb40aab28bb3972f165370ffdc3f6e9c3e8039d9659c717e5cb1fd33266d31f3fb030449a57f48796c9190186480daf832ed5dff42579278bb9dbcd8cc5

Download Submit
C:\DriversavesRuntimecommon\OkPX18dWDtVLA0gJUAYq8tEymJIvb.vbe
MD5
d71998b7f7a50d7f82c3cb8240b75ef1

SHA1
278f6bc21583b6258b248c34a6b65cfcc752b4be

SHA256
bb473710e90bc6be56e175b4fdb382aad5cdfd77571b313235db621ede9e6c41

SHA512
c89201101b21d62a3327ab0365edeeaf1379d4c7bf6fe3449ee211707e82e8f8a78132ba8777bd935bc450684d63d8353540811dad0da76ae532a565d2919b7e

Download Submit
C:\DriversavesRuntimecommon\file.vbs
MD5
677cc4360477c72cb0ce00406a949c61

SHA1
b679e8c3427f6c5fc47c8ac46cd0e56c9424de05

SHA256
f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b

SHA512
7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a

Download Submit
C:\DriversavesRuntimecommon\i8SeDW7.bat
MD5
39a43637ff068395e3f1cc29d619b61d

SHA1
7832b43422507b545276b0338362619529e7f964

SHA256
6b74040331ca65b2959ced9dd6768cc93c7e22db31f603e9497ba88d1e5b0d79

SHA512
b2a17cde1425cf59659fc941250134487f567b28a2ced716771a7152888739a2cbf61296625b9a9f21269fb2c81df3f2431d4239cb359c9bfea94685e4fb7dd7

Download Submit
C:\Windows\System32\adrclient\spoolsv.exe
MD5
8daa2fddfdf7939d8f6af197a459086b

SHA1
d8b3ade8c8f097cdcfc6e42c8a33f09d21fdf89b

SHA256
f135db9a52b92622d288181553661b0e3ab9338c3f86173f906ff58acdbb8a9e

SHA512
4c30dfb40aab28bb3972f165370ffdc3f6e9c3e8039d9659c717e5cb1fd33266d31f3fb030449a57f48796c9190186480daf832ed5dff42579278bb9dbcd8cc5

Download Submit
C:\Windows\System32\adrclient\spoolsv.exe
MD5
8daa2fddfdf7939d8f6af197a459086b

SHA1
d8b3ade8c8f097cdcfc6e42c8a33f09d21fdf89b

SHA256
f135db9a52b92622d288181553661b0e3ab9338c3f86173f906ff58acdbb8a9e

SHA512
4c30dfb40aab28bb3972f165370ffdc3f6e9c3e8039d9659c717e5cb1fd33266d31f3fb030449a57f48796c9190186480daf832ed5dff42579278bb9dbcd8cc5

Download Submit
memory/2652-142-0x0000000000EA0000-0x0000000000EB0000-memory.dmp

Filesize
64KB

Download
memory/3768-137-0x0000000000D60000-0x0000000000E5E000-memory.dmp

Filesize
1016KB

Download
memory/3768-138-0x000000001C250000-0x000000001C778000-memory.dmp

Filesize
5.2MB

Download
memory/3768-139-0x000000001BA10000-0x000000001BA12000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads