dcrat | 4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798

General

Target

4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
Size

826KB
MD5

d0cd2568bf153709f5ed4491bd8534ab
SHA1

070e2b33bd4e51417eb1ac74301f25afb35d7ec2
SHA256

4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798
SHA512

0ea13e0dff1c362eeb02f75ebef502a3605f5c381082f05548dfd0213cdc78aa90757876f9bae5348255794645a99eb83a0c72fb27e64d4b1c02d9d0cc1c6b98
SSDEEP

12288:82NE1Iv7VIWfLEcNif4F4aJHIi4ENQj0SeyZIZOJ59bsAzeA7:e1aV9fLofI4aVNYGZ059bNyI

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
Dcrat family
dcrat

Process spawned unexpected child process 24 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	2904	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4104	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2220	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3252	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2368	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4460	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1816	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1752	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2832	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4192	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2092	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2664	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3604	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1804	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	748	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5100	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	948	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1224	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	532	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1824	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3000	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3188	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3388	4948	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	220	4948	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/2840-1-0x00000000009D0000-0x0000000000AA6000-memory.dmp	dcrat
behavioral2/files/0x0008000000023bc7-11.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe

Executes dropped EXE 1 IoCs

pid	Process
3060	fontdrvhost.exe

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Windows Portable Devices\Registry.exe	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files\WindowsPowerShell\sihost.exe	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files (x86)\Common Files\Microsoft Shared\121e5b5079f7c0	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files (x86)\Windows Portable Devices\Registry.exe	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files (x86)\Windows Portable Devices\ee2ad38f3d4382	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\en-US\fontdrvhost.exe	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\en-US\5b884080fd4f94	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files\WindowsPowerShell\66fc9ff0ee96c2	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Program Files (x86)\Common Files\Microsoft Shared\sysmon.exe	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\twain_32\System.exe	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
File created	C:\Windows\twain_32\27d1bcfc3c54e0	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.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 24 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1804	schtasks.exe
948	schtasks.exe
3252	schtasks.exe
2368	schtasks.exe
4460	schtasks.exe
4192	schtasks.exe
5100	schtasks.exe
1224	schtasks.exe
1824	schtasks.exe
3000	schtasks.exe
2220	schtasks.exe
1816	schtasks.exe
2664	schtasks.exe
3604	schtasks.exe
3188	schtasks.exe
2904	schtasks.exe
748	schtasks.exe
220	schtasks.exe
532	schtasks.exe
3388	schtasks.exe
4104	schtasks.exe
1752	schtasks.exe
2832	schtasks.exe
2092	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
3060	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
Token: SeDebugPrivilege	3060	fontdrvhost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2840 wrote to memory of 3060	2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe	107
PID 2840 wrote to memory of 3060	2840	4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe	107

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\4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe
"C:\Users\Admin\AppData\Local\Temp\4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2840
- C:\Program Files (x86)\Windows NT\Accessories\en-US\fontdrvhost.exe
  "C:\Program Files (x86)\Windows NT\Accessories\en-US\fontdrvhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Portable Devices\Registry.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\Registry.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Windows Portable Devices\Registry.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2220

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3252

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2368

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\Windows\twain_32\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Windows\twain_32\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\Windows\twain_32\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2832

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 5 /tr "'C:\Program Files\WindowsPowerShell\sihost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Program Files\WindowsPowerShell\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2092

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 6 /tr "'C:\Program Files\WindowsPowerShell\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1804

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:748

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Documents\OfficeClickToRun.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5100

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Users\All Users\Documents\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 12 /tr "'C:\Users\All Users\Documents\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1224

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Common Files\Microsoft Shared\sysmon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\Microsoft Shared\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Common Files\Microsoft Shared\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3188

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3388

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:220

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

Exfiltration

Impact

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Downloads

C:\Recovery\WindowsRE\dllhost.exe

Filesize
826KB

MD5
d0cd2568bf153709f5ed4491bd8534ab

SHA1
070e2b33bd4e51417eb1ac74301f25afb35d7ec2

SHA256
4d77c973871f6870b7adb2703dcfa7d1941d12aaf6ad761f0d7cdd94092db798

SHA512
0ea13e0dff1c362eeb02f75ebef502a3605f5c381082f05548dfd0213cdc78aa90757876f9bae5348255794645a99eb83a0c72fb27e64d4b1c02d9d0cc1c6b98

Download Submit
memory/2840-0-0x00007FFB52293000-0x00007FFB52295000-memory.dmp

Filesize
8KB

Download
memory/2840-1-0x00000000009D0000-0x0000000000AA6000-memory.dmp

Filesize
856KB

Download
memory/2840-2-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download
memory/2840-30-0x00007FFB52290000-0x00007FFB52D51000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads