dcrat | 394c5bdb282b16f8fc323f01c9a0ebe0a3824c95efbc082a5ae7b1d547ab3617

General

Target

154029aecb8134930418ece2437864b8.exe
Size

1.5MB
MD5

154029aecb8134930418ece2437864b8
SHA1

a43825d5c82e4266a37e60a746c31ab128b2a4a1
SHA256

394c5bdb282b16f8fc323f01c9a0ebe0a3824c95efbc082a5ae7b1d547ab3617
SHA512

2cc0dd8965fb53479fed5107ec2b8ba90ae15dbbc22f1d0d7bffc573cf049d69ce745840fdaa582060940f5be8381cfd5ecec870943d6a3ddda95c9f32a9826c
SSDEEP

24576:u/R6JpYYCpuA5TwiNgFE/4vZy270wlc8cz4lc2zVg5OlyxJ:uZ6a8+DsZ5lyzIcUawly

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	2872	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2896	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2972	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2968	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2904	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2648	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2792	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2824	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2644	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2600	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3056	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3060	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1768	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	308	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2060	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1200	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2688	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2024	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2164	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1916	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1268	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1612	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1508	2768	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1732	2768	schtasks.exe	30

DCRat payload 5 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2376-1-0x00000000000B0000-0x0000000000242000-memory.dmp	dcrat
behavioral1/files/0x0005000000019436-20.dat	dcrat
behavioral1/files/0x0005000000019fb9-44.dat	dcrat
behavioral1/files/0x000500000001a067-64.dat	dcrat
behavioral1/memory/2188-133-0x0000000000CC0000-0x0000000000E52000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2188	System.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Program Files\Java\jdk1.7.0_80\bin\fb707b414c0281	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\RCXC958.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\RCXC959.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe	154029aecb8134930418ece2437864b8.exe

Drops file in Windows directory 15 IoCs

description	ioc	Process
File created	C:\Windows\de-DE\f3b6ecef712a24	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\L2Schemas\sppsvc.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\de-DE\RCXC203.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\DigitalLocker\RCXC474.tmp	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\L2Schemas\sppsvc.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\de-DE\spoolsv.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\DigitalLocker\6ccacd8608530f	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\de-DE\spoolsv.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\DigitalLocker\Idle.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\L2Schemas\0a1fd5f707cd16	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\DigitalLocker\Idle.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\L2Schemas\RCXBB78.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\de-DE\RCXC195.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\L2Schemas\RCXBB77.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\DigitalLocker\RCXC475.tmp	154029aecb8134930418ece2437864b8.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
1768	schtasks.exe
308	schtasks.exe
2872	schtasks.exe
2972	schtasks.exe
2904	schtasks.exe
2824	schtasks.exe
2600	schtasks.exe
2060	schtasks.exe
2688	schtasks.exe
1268	schtasks.exe
1732	schtasks.exe
1508	schtasks.exe
3056	schtasks.exe
3060	schtasks.exe
1200	schtasks.exe
2896	schtasks.exe
2968	schtasks.exe
2648	schtasks.exe
2792	schtasks.exe
2644	schtasks.exe
2024	schtasks.exe
2164	schtasks.exe
1916	schtasks.exe
1612	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2376	154029aecb8134930418ece2437864b8.exe
2376	154029aecb8134930418ece2437864b8.exe
2376	154029aecb8134930418ece2437864b8.exe
2188	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2376	154029aecb8134930418ece2437864b8.exe
Token: SeDebugPrivilege	2188	System.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 752	2376	154029aecb8134930418ece2437864b8.exe	56
PID 2376 wrote to memory of 752	2376	154029aecb8134930418ece2437864b8.exe	56
PID 2376 wrote to memory of 752	2376	154029aecb8134930418ece2437864b8.exe	56
PID 752 wrote to memory of 320	752	cmd.exe	58
PID 752 wrote to memory of 320	752	cmd.exe	58
PID 752 wrote to memory of 320	752	cmd.exe	58
PID 752 wrote to memory of 2188	752	cmd.exe	59
PID 752 wrote to memory of 2188	752	cmd.exe	59
PID 752 wrote to memory of 2188	752	cmd.exe	59

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\154029aecb8134930418ece2437864b8.exe
"C:\Users\Admin\AppData\Local\Temp\154029aecb8134930418ece2437864b8.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\NDYpU86GSv.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:752
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:320
- - C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe
    "C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2188

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2972

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 11 /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2644

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 6 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3056

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Windows\de-DE\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\de-DE\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Windows\de-DE\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2060

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Windows\DigitalLocker\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1200

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Windows\DigitalLocker\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\Windows\DigitalLocker\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2164

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Default User\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1268

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "154029aecb8134930418ece2437864b81" /sc MINUTE /mo 7 /tr "'C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "154029aecb8134930418ece2437864b8" /sc ONLOGON /tr "'C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1508

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "154029aecb8134930418ece2437864b81" /sc MINUTE /mo 5 /tr "'C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1732

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\RCXBD8C.tmp

Filesize
1.5MB

MD5
b66ab928d005c01e272ac126df443b9a

SHA1
aa31d93b26e4172953a46a3c9b68a3221e69220a

SHA256
6344d2c73350e07c8e30d64180483de154713efe517422b4b23d6a9de376901e

SHA512
2d738a0854c1e9e83f9a6e03978e9bb10ba33869f34cfe4cbfb85b22e478269b5f23b5f5f77509b5f4e40d20c242ae0779e308c460f45beb342002ec03afb53e

Download Submit
C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe

Filesize
1.5MB

MD5
5cb89939971a12da1aea4b90d045e19c

SHA1
6de4ce4d696c0e92c154a1372cd4c92311d2e28a

SHA256
68629c937c7603b54531e10b18bf74368a9da0b4039182d82d049e598800ada4

SHA512
c6e09b0ffe64ff6c24c408936904240eeb37862bd20894e737c37e5cf702d49f09f343601664bdfd2b64e2dc9b3242cd031fef5544ab7815d767e4d7c45f02aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\NDYpU86GSv.bat

Filesize
224B

MD5
e6b7519612ec6650e3cc6957812618c9

SHA1
1b764ba3047ac20cb0159e95566435f1cf5d51ef

SHA256
b96101f3eb1be278c16ecfd6c77cfea5c5025179b70ca7bfbfb69f35654b62c0

SHA512
c130911c4df4048f44a3db1990afb0f0d1d0070c5728ec50957280cdf9826384465b696b2587868d020b91460d6076806b07d19ee164e02dc917b5302b0bf039

Download Submit
C:\Windows\de-DE\spoolsv.exe

Filesize
1.5MB

MD5
154029aecb8134930418ece2437864b8

SHA1
a43825d5c82e4266a37e60a746c31ab128b2a4a1

SHA256
394c5bdb282b16f8fc323f01c9a0ebe0a3824c95efbc082a5ae7b1d547ab3617

SHA512
2cc0dd8965fb53479fed5107ec2b8ba90ae15dbbc22f1d0d7bffc573cf049d69ce745840fdaa582060940f5be8381cfd5ecec870943d6a3ddda95c9f32a9826c

Download Submit
memory/2188-133-0x0000000000CC0000-0x0000000000E52000-memory.dmp

Filesize
1.6MB

Download
memory/2376-4-0x0000000000380000-0x0000000000390000-memory.dmp

Filesize
64KB

Download
memory/2376-6-0x00000000005B0000-0x00000000005C0000-memory.dmp

Filesize
64KB

Download
memory/2376-7-0x00000000005C0000-0x00000000005CC000-memory.dmp

Filesize
48KB

Download
memory/2376-8-0x00000000005D0000-0x00000000005DC000-memory.dmp

Filesize
48KB

Download
memory/2376-9-0x00000000005E0000-0x00000000005EE000-memory.dmp

Filesize
56KB

Download
memory/2376-10-0x00000000005F0000-0x00000000005FE000-memory.dmp

Filesize
56KB

Download
memory/2376-11-0x0000000000680000-0x000000000068A000-memory.dmp

Filesize
40KB

Download
memory/2376-5-0x0000000000590000-0x00000000005A6000-memory.dmp

Filesize
88KB

Download
memory/2376-0-0x000007FEF6523000-0x000007FEF6524000-memory.dmp

Filesize
4KB

Download
memory/2376-3-0x0000000000360000-0x000000000037C000-memory.dmp

Filesize
112KB

Download
memory/2376-129-0x000007FEF6520000-0x000007FEF6F0C000-memory.dmp

Filesize
9.9MB

Download
memory/2376-2-0x000007FEF6520000-0x000007FEF6F0C000-memory.dmp

Filesize
9.9MB

Download
memory/2376-1-0x00000000000B0000-0x0000000000242000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads