dcrat | 366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb

General

Target

3c439a0dac41ce86b80a6b1f2eb8908b.exe
Size

2.2MB
MD5

3c439a0dac41ce86b80a6b1f2eb8908b
SHA1

1ed48a383c839bf2f601c63e237b02bf532c5f4a
SHA256

366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb
SHA512

4c446ed60f907b496a5246371f6afb6b7c39d52e5eb89c20cb4aed402de0b8947441badbd7a8ffe17ca38f910538b71f7ee03aec8c8ee463a529395eb5e8af00
SSDEEP

24576:BIKJvchtNfuWMqI/+Q0uwPTJ7CVhqbYziqp66B2eNizXR6yPp+oUP2mBXrp8AfiM:hJiB20rrsiqp6W22ITCdt85aBtuEg

Score

10^/10

dcrat evasion infostealer rat spyware stealer trojan

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 9 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	3792	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4380	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5004	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2180	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4700	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3144	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4944	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1580	1980	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1532	1980	schtasks.exe	83

UAC bypass 3 TTPs 6 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	sysmon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	sysmon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	sysmon.exe

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1888-1-0x0000000000020000-0x000000000025A000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cb2-16.dat	dcrat

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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	3c439a0dac41ce86b80a6b1f2eb8908b.exe

Executes dropped EXE 1 IoCs

pid	Process
4948	sysmon.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	sysmon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	sysmon.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Logs\TextInputHost.exe	3c439a0dac41ce86b80a6b1f2eb8908b.exe
File created	C:\Windows\Logs\22eafd247d37c3	3c439a0dac41ce86b80a6b1f2eb8908b.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4380	schtasks.exe
3144	schtasks.exe
4944	schtasks.exe
1580	schtasks.exe
1532	schtasks.exe
3792	schtasks.exe
5004	schtasks.exe
2180	schtasks.exe
4700	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1888	3c439a0dac41ce86b80a6b1f2eb8908b.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe
4948	sysmon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1888	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Token: SeDebugPrivilege	4948	sysmon.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1888 wrote to memory of 4948	1888	3c439a0dac41ce86b80a6b1f2eb8908b.exe	93
PID 1888 wrote to memory of 4948	1888	3c439a0dac41ce86b80a6b1f2eb8908b.exe	93

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	sysmon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	sysmon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	sysmon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	3c439a0dac41ce86b80a6b1f2eb8908b.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	3c439a0dac41ce86b80a6b1f2eb8908b.exe

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\3c439a0dac41ce86b80a6b1f2eb8908b.exe
"C:\Users\Admin\AppData\Local\Temp\3c439a0dac41ce86b80a6b1f2eb8908b.exe"
1⤵
- UAC bypass
- Checks computer location settings
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1888
- C:\Recovery\WindowsRE\sysmon.exe
  "C:\Recovery\WindowsRE\sysmon.exe"
  2⤵
  - UAC bypass
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - System policy modification
  PID:4948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4380

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5004

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 10 /tr "'C:\Windows\Logs\TextInputHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2180

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\Logs\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 12 /tr "'C:\Windows\Logs\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3144

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1532

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

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Recovery\WindowsRE\sysmon.exe

Filesize
2.2MB

MD5
3c439a0dac41ce86b80a6b1f2eb8908b

SHA1
1ed48a383c839bf2f601c63e237b02bf532c5f4a

SHA256
366f3a7eb764ad2e8b8bd1ebcf389cbfad6034f4c6257f1cdd21a7a3cac768eb

SHA512
4c446ed60f907b496a5246371f6afb6b7c39d52e5eb89c20cb4aed402de0b8947441badbd7a8ffe17ca38f910538b71f7ee03aec8c8ee463a529395eb5e8af00

Download Submit
memory/1888-0-0x00007FFAABF93000-0x00007FFAABF95000-memory.dmp

Filesize
8KB

Download
memory/1888-1-0x0000000000020000-0x000000000025A000-memory.dmp

Filesize
2.2MB

Download
memory/1888-2-0x00007FFAABF90000-0x00007FFAACA51000-memory.dmp

Filesize
10.8MB

Download
memory/1888-3-0x0000000002370000-0x000000000238C000-memory.dmp

Filesize
112KB

Download
memory/1888-4-0x0000000002500000-0x0000000002550000-memory.dmp

Filesize
320KB

Download
memory/1888-6-0x0000000000A70000-0x0000000000A7A000-memory.dmp

Filesize
40KB

Download
memory/1888-5-0x0000000002390000-0x00000000023A6000-memory.dmp

Filesize
88KB

Download
memory/1888-7-0x000000001AF40000-0x000000001AF96000-memory.dmp

Filesize
344KB

Download
memory/1888-8-0x00000000023B0000-0x00000000023BC000-memory.dmp

Filesize
48KB

Download
memory/1888-26-0x00007FFAABF90000-0x00007FFAACA51000-memory.dmp

Filesize
10.8MB

Download
memory/4948-27-0x000000001BBC0000-0x000000001BC16000-memory.dmp

Filesize
344KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads