dcrat | d4e0dbb934691a16f4c9fb7534e2c0f2940389e65e1799f6f231909edaf171a7

General

Target

3053cb488a47f0cfa652722c79486ff8.exe
Size

2.3MB
MD5

3053cb488a47f0cfa652722c79486ff8
SHA1

59eeca2266169cab55c917755e5f0996b4866cf8
SHA256

d4e0dbb934691a16f4c9fb7534e2c0f2940389e65e1799f6f231909edaf171a7
SHA512

c346ac3d951e85371a237a0eef469331f756096a5d68f7b529cef9e48fa2ea2e8a4d6687f09fdad177c0b4eb4d70ca6fd3edeb13e38f9d91eecef5e92b730a4c
SSDEEP

49152:AWZrpdaJJVoYNRFmujPP2TyqYOENC3tAaJWX/L2qU6A77DA7so8j8K:AWp8oYNquTkyPXw3yaJ0JUL7ah

Score

10^/10

dcrat infostealer rat spyware stealer

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 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	4252	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1064	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1460	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2064	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2460	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3904	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3612	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4172	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3576	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2684	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3548	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1664	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4372	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3096	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2736	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	320	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	216	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2876	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	404	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4956	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5052	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3828	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4364	1940	schtasks.exe	63
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4796	1940	schtasks.exe	63

DCRat payload 5 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4772-134-0x0000000000820000-0x0000000000D18000-memory.dmp	dcrat
behavioral2/memory/4772-169-0x0000000000820000-0x0000000000D18000-memory.dmp	dcrat
behavioral2/memory/340-171-0x0000000001000000-0x00000000014F8000-memory.dmp	dcrat
behavioral2/memory/340-172-0x0000000001000000-0x00000000014F8000-memory.dmp	dcrat
behavioral2/memory/340-176-0x0000000001000000-0x00000000014F8000-memory.dmp	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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	3053cb488a47f0cfa652722c79486ff8.exe

Executes dropped EXE 1 IoCs

pid	Process
340	sihost.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

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
21	ipinfo.io
22	ipinfo.io

Suspicious use of NtSetInformationThreadHideFromDebugger 17 IoCs

pid	Process
4772	3053cb488a47f0cfa652722c79486ff8.exe
4772	3053cb488a47f0cfa652722c79486ff8.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\sihost.exe	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\886983d96e3d3e	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\ja-JP\7a0fd90576e088	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files\Microsoft Office\Updates\Apply\FilesInUse\RuntimeBroker.exe	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files\Microsoft Office\Updates\Apply\FilesInUse\9e8d7a4ca61bd9	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\sihost.exe	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\66fc9ff0ee96c2	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\csrss.exe	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\ja-JP\explorer.exe	3053cb488a47f0cfa652722c79486ff8.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Boot\PCAT\es-MX\upfc.exe	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Windows\de-DE\backgroundTaskHost.exe	3053cb488a47f0cfa652722c79486ff8.exe
File created	C:\Windows\de-DE\eddb19405b7ce1	3053cb488a47f0cfa652722c79486ff8.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 24 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
404	schtasks.exe
4252	schtasks.exe
3904	schtasks.exe
3576	schtasks.exe
3548	schtasks.exe
2736	schtasks.exe
320	schtasks.exe
216	schtasks.exe
4956	schtasks.exe
4364	schtasks.exe
4796	schtasks.exe
2460	schtasks.exe
1664	schtasks.exe
4372	schtasks.exe
3096	schtasks.exe
2876	schtasks.exe
3828	schtasks.exe
1064	schtasks.exe
1460	schtasks.exe
2064	schtasks.exe
3612	schtasks.exe
4172	schtasks.exe
2684	schtasks.exe
5052	schtasks.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
4772	3053cb488a47f0cfa652722c79486ff8.exe
4772	3053cb488a47f0cfa652722c79486ff8.exe
4772	3053cb488a47f0cfa652722c79486ff8.exe
4772	3053cb488a47f0cfa652722c79486ff8.exe
4772	3053cb488a47f0cfa652722c79486ff8.exe
4772	3053cb488a47f0cfa652722c79486ff8.exe
4772	3053cb488a47f0cfa652722c79486ff8.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe
340	sihost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
340	sihost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4772	3053cb488a47f0cfa652722c79486ff8.exe
Token: SeDebugPrivilege	340	sihost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4772	3053cb488a47f0cfa652722c79486ff8.exe
340	sihost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 340	4772	3053cb488a47f0cfa652722c79486ff8.exe	110
PID 4772 wrote to memory of 340	4772	3053cb488a47f0cfa652722c79486ff8.exe	110
PID 4772 wrote to memory of 340	4772	3053cb488a47f0cfa652722c79486ff8.exe	110

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\3053cb488a47f0cfa652722c79486ff8.exe
"C:\Users\Admin\AppData\Local\Temp\3053cb488a47f0cfa652722c79486ff8.exe"
1⤵
- Checks computer location settings
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Users\All Users\sihost.exe
  "C:\Users\All Users\sihost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:340

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\sihost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4252

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 12 /tr "'C:\Windows\de-DE\backgroundTaskHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\de-DE\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 10 /tr "'C:\Windows\de-DE\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\odt\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\odt\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4172

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\odt\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3576

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Users\Public\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Public\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3548

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Users\Public\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4372

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3096

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2736

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Photo Viewer\ja-JP\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:320

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\ja-JP\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:216

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Photo Viewer\ja-JP\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files\Microsoft Office\Updates\Apply\FilesInUse\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\Updates\Apply\FilesInUse\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4956

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Program Files\Microsoft Office\Updates\Apply\FilesInUse\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:5052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\sihost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3828

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Users\All Users\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4364

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\csrss.exe

Filesize
2.3MB

MD5
3053cb488a47f0cfa652722c79486ff8

SHA1
59eeca2266169cab55c917755e5f0996b4866cf8

SHA256
d4e0dbb934691a16f4c9fb7534e2c0f2940389e65e1799f6f231909edaf171a7

SHA512
c346ac3d951e85371a237a0eef469331f756096a5d68f7b529cef9e48fa2ea2e8a4d6687f09fdad177c0b4eb4d70ca6fd3edeb13e38f9d91eecef5e92b730a4c

Download Submit
C:\ProgramData\sihost.exe

Filesize
2.3MB

MD5
3053cb488a47f0cfa652722c79486ff8

SHA1
59eeca2266169cab55c917755e5f0996b4866cf8

SHA256
d4e0dbb934691a16f4c9fb7534e2c0f2940389e65e1799f6f231909edaf171a7

SHA512
c346ac3d951e85371a237a0eef469331f756096a5d68f7b529cef9e48fa2ea2e8a4d6687f09fdad177c0b4eb4d70ca6fd3edeb13e38f9d91eecef5e92b730a4c

Download Submit
C:\Users\All Users\sihost.exe

Filesize
2.3MB

MD5
3053cb488a47f0cfa652722c79486ff8

SHA1
59eeca2266169cab55c917755e5f0996b4866cf8

SHA256
d4e0dbb934691a16f4c9fb7534e2c0f2940389e65e1799f6f231909edaf171a7

SHA512
c346ac3d951e85371a237a0eef469331f756096a5d68f7b529cef9e48fa2ea2e8a4d6687f09fdad177c0b4eb4d70ca6fd3edeb13e38f9d91eecef5e92b730a4c

Download Submit
memory/340-170-0x0000000001000000-0x00000000014F8000-memory.dmp

Filesize
5.0MB

Download
memory/340-171-0x0000000001000000-0x00000000014F8000-memory.dmp

Filesize
5.0MB

Download
memory/340-215-0x0000000005700000-0x0000000005710000-memory.dmp

Filesize
64KB

Download
memory/340-176-0x0000000001000000-0x00000000014F8000-memory.dmp

Filesize
5.0MB

Download
memory/340-174-0x0000000007FD0000-0x0000000008192000-memory.dmp

Filesize
1.8MB

Download
memory/340-173-0x0000000005700000-0x0000000005710000-memory.dmp

Filesize
64KB

Download
memory/340-172-0x0000000001000000-0x00000000014F8000-memory.dmp

Filesize
5.0MB

Download
memory/4772-142-0x0000000007090000-0x00000000070F6000-memory.dmp

Filesize
408KB

Download
memory/4772-169-0x0000000000820000-0x0000000000D18000-memory.dmp

Filesize
5.0MB

Download
memory/4772-133-0x0000000000820000-0x0000000000D18000-memory.dmp

Filesize
5.0MB

Download
memory/4772-134-0x0000000000820000-0x0000000000D18000-memory.dmp

Filesize
5.0MB

Download
memory/4772-135-0x0000000006A20000-0x0000000006FC4000-memory.dmp

Filesize
5.6MB

Download
memory/4772-136-0x0000000005FA0000-0x0000000005FB0000-memory.dmp

Filesize
64KB

Download
memory/4772-137-0x0000000006670000-0x0000000006702000-memory.dmp

Filesize
584KB

Download
memory/4772-139-0x0000000007500000-0x0000000007A2C000-memory.dmp

Filesize
5.2MB

Download
memory/4772-138-0x0000000006620000-0x0000000006670000-memory.dmp

Filesize
320KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads