dcrat | 30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c

General

Target

30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Size

3.3MB
MD5

ca1c3f84e0259d9c423e34e20840f142
SHA1

3efc257f5027a1a1a205adcdbcb999e1ef8b3b7d
SHA256

30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c
SHA512

8cf6d715fbcad8eff71f4102479ed189a8e71438613225ae26c4e40dd696152a9d2efec028d602b8e25902aeea25961541749029d30a6f5fce5fd36d997fd5e1
SSDEEP

98304:0LMvB0KtBC+ZiFJCY4zsqyv7TUws7LRh1Bk308m3/T:0gvOK9MF5qy/UZdz8Q/T

Score

10^/10

dcrat evasion infostealer rat 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 12 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	1512	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4936	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1976	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1280	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3024	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1176	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1552	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	988	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1548	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4344	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4780	1488	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3900	1488	schtasks.exe	85

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\ConsentPromptBehaviorAdmin = "0"	taskhostw.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	taskhostw.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	taskhostw.exe

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/3136-1-0x0000000000520000-0x000000000087C000-memory.dmp	dcrat
behavioral2/files/0x0009000000023bac-22.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe

Executes dropped EXE 1 IoCs

pid	Process
5024	taskhostw.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	taskhostw.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	taskhostw.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Microsoft Office 15\ClientX64\ea1d8f6d871115	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
File created	C:\Program Files\Crashpad\SppExtComObj.exe	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
File created	C:\Program Files\Crashpad\e1ef82546f0b02	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
File created	C:\Program Files\Microsoft Office 15\ClientX64\upfc.exe	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.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 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4936	schtasks.exe
1976	schtasks.exe
1176	schtasks.exe
988	schtasks.exe
4780	schtasks.exe
3900	schtasks.exe
1512	schtasks.exe
1280	schtasks.exe
3024	schtasks.exe
1552	schtasks.exe
1548	schtasks.exe
4344	schtasks.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
5024	taskhostw.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Token: SeDebugPrivilege	5024	taskhostw.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3136 wrote to memory of 5024	3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe	98
PID 3136 wrote to memory of 5024	3136	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe	98

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\EnableLUA = "0"	taskhostw.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	taskhostw.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	taskhostw.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.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\30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe
"C:\Users\Admin\AppData\Local\Temp\30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c.exe"
1⤵
- UAC bypass
- Checks computer location settings
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3136
- C:\Recovery\WindowsRE\taskhostw.exe
  "C:\Recovery\WindowsRE\taskhostw.exe"
  2⤵
  - UAC bypass
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - System policy modification
  PID:5024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1512

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\taskhostw.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 "taskhostwt" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Users\All Users\Documents\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1280

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\All Users\Documents\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\Documents\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1176

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 6 /tr "'C:\Program Files\Crashpad\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files\Crashpad\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 14 /tr "'C:\Program Files\Crashpad\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1548

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 12 /tr "'C:\Program Files\Microsoft Office 15\ClientX64\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4344

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office 15\ClientX64\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4780

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 13 /tr "'C:\Program Files\Microsoft Office 15\ClientX64\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3900

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

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Recovery\WindowsRE\taskhostw.exe

Filesize
3.3MB

MD5
ca1c3f84e0259d9c423e34e20840f142

SHA1
3efc257f5027a1a1a205adcdbcb999e1ef8b3b7d

SHA256
30d404945af42d77bfd6ac92739486e8d00496a977ba6a6f0240cd20b7989f2c

SHA512
8cf6d715fbcad8eff71f4102479ed189a8e71438613225ae26c4e40dd696152a9d2efec028d602b8e25902aeea25961541749029d30a6f5fce5fd36d997fd5e1

Download Submit
memory/3136-8-0x000000001BE80000-0x000000001BED6000-memory.dmp

Filesize
344KB

Download
memory/3136-5-0x000000001BC80000-0x000000001BCD0000-memory.dmp

Filesize
320KB

Download
memory/3136-9-0x000000001BC50000-0x000000001BC5C000-memory.dmp

Filesize
48KB

Download
memory/3136-4-0x000000001BC10000-0x000000001BC2C000-memory.dmp

Filesize
112KB

Download
memory/3136-10-0x000000001BC60000-0x000000001BC72000-memory.dmp

Filesize
72KB

Download
memory/3136-6-0x000000001BC30000-0x000000001BC38000-memory.dmp

Filesize
32KB

Download
memory/3136-7-0x000000001BC40000-0x000000001BC4A000-memory.dmp

Filesize
40KB

Download
memory/3136-11-0x000000001C420000-0x000000001C948000-memory.dmp

Filesize
5.2MB

Download
memory/3136-3-0x000000001B480000-0x000000001B48E000-memory.dmp

Filesize
56KB

Download
memory/3136-2-0x00007FF8DBAB0000-0x00007FF8DC571000-memory.dmp

Filesize
10.8MB

Download
memory/3136-0-0x00007FF8DBAB3000-0x00007FF8DBAB5000-memory.dmp

Filesize
8KB

Download
memory/3136-13-0x000000001BF40000-0x000000001BF4C000-memory.dmp

Filesize
48KB

Download
memory/3136-12-0x000000001BC70000-0x000000001BC7E000-memory.dmp

Filesize
56KB

Download
memory/3136-1-0x0000000000520000-0x000000000087C000-memory.dmp

Filesize
3.4MB

Download
memory/3136-33-0x00007FF8DBAB0000-0x00007FF8DC571000-memory.dmp

Filesize
10.8MB

Download
memory/5024-34-0x000000001B940000-0x000000001B996000-memory.dmp

Filesize
344KB

Download
memory/5024-35-0x000000001B320000-0x000000001B332000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads