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 15 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	2324	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2760	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2816	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2864	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2496	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2652	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2640	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2872	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2644	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2616	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2648	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2692	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3064	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2292	2320	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1780	2320	schtasks.exe	30

DCRat payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2444-1-0x0000000000B00000-0x0000000000C92000-memory.dmp	dcrat
behavioral1/files/0x00050000000193c9-20.dat	dcrat
behavioral1/files/0x0005000000019501-38.dat	dcrat
behavioral1/files/0x0008000000019503-66.dat	dcrat
behavioral1/files/0x000b000000016cf8-79.dat	dcrat
behavioral1/memory/2808-89-0x0000000001070000-0x0000000001202000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2808	winlogon.exe

Drops file in Program Files directory 10 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows NT\Accessories\fr-FR\6ccacd8608530f	154029aecb8134930418ece2437864b8.exe
File created	C:\Program Files\Microsoft Office\Office14\1033\WmiPrvSE.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files (x86)\Windows NT\Accessories\fr-FR\Idle.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files\Microsoft Office\Office14\1033\RCXD516.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files\Microsoft Office\Office14\1033\WmiPrvSE.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\fr-FR\Idle.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Program Files\Microsoft Office\Office14\1033\24dbde2999530e	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files (x86)\Windows NT\Accessories\fr-FR\RCXD08E.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files (x86)\Windows NT\Accessories\fr-FR\RCXD08F.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Program Files\Microsoft Office\Office14\1033\RCXD515.tmp	154029aecb8134930418ece2437864b8.exe

Drops file in Windows directory 15 IoCs

description	ioc	Process
File created	C:\Windows\Logs\DPX\winlogon.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\Logs\DPX\winlogon.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\AppPatch\de-DE\smss.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\AppPatch\de-DE\smss.exe	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\AppPatch\de-DE\RCXD301.tmp	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\Logs\DPX\cc11b995f2a76d	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\Microsoft.NET\assembly\csrss.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\AppPatch\de-DE\69ddcba757bf72	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\Logs\DPX\RCXCB8C.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\Microsoft.NET\assembly\csrss.exe	154029aecb8134930418ece2437864b8.exe
File created	C:\Windows\Microsoft.NET\assembly\886983d96e3d3e	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\Logs\DPX\RCXCB1E.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\Microsoft.NET\assembly\RCXCD9F.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\Microsoft.NET\assembly\RCXCE1D.tmp	154029aecb8134930418ece2437864b8.exe
File opened for modification	C:\Windows\AppPatch\de-DE\RCXD293.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 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2292	schtasks.exe
2616	schtasks.exe
2652	schtasks.exe
2872	schtasks.exe
2644	schtasks.exe
1780	schtasks.exe
2816	schtasks.exe
2864	schtasks.exe
2496	schtasks.exe
2640	schtasks.exe
2324	schtasks.exe
2648	schtasks.exe
2692	schtasks.exe
3064	schtasks.exe
2760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2444	154029aecb8134930418ece2437864b8.exe
2808	winlogon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2444	154029aecb8134930418ece2437864b8.exe
Token: SeDebugPrivilege	2808	winlogon.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 2808	2444	154029aecb8134930418ece2437864b8.exe	47
PID 2444 wrote to memory of 2808	2444	154029aecb8134930418ece2437864b8.exe	47
PID 2444 wrote to memory of 2808	2444	154029aecb8134930418ece2437864b8.exe	47

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:2444
- C:\Windows\Logs\DPX\winlogon.exe
  "C:\Windows\Logs\DPX\winlogon.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2808

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Windows\Logs\DPX\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2324

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\Logs\DPX\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\Windows\Logs\DPX\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Windows\Microsoft.NET\assembly\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\Microsoft.NET\assembly\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2496

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Windows\Microsoft.NET\assembly\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows NT\Accessories\fr-FR\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\fr-FR\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows NT\Accessories\fr-FR\Idle.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 "smsss" /sc MINUTE /mo 14 /tr "'C:\Windows\AppPatch\de-DE\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2616

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\AppPatch\de-DE\smss.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 "smsss" /sc MINUTE /mo 7 /tr "'C:\Windows\AppPatch\de-DE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 13 /tr "'C:\Program Files\Microsoft Office\Office14\1033\WmiPrvSE.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\Office14\1033\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2292

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 12 /tr "'C:\Program Files\Microsoft Office\Office14\1033\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1780

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:\Program Files\Microsoft Office\Office14\1033\RCXD516.tmp

Filesize
1.5MB

MD5
b66ab928d005c01e272ac126df443b9a

SHA1
aa31d93b26e4172953a46a3c9b68a3221e69220a

SHA256
6344d2c73350e07c8e30d64180483de154713efe517422b4b23d6a9de376901e

SHA512
2d738a0854c1e9e83f9a6e03978e9bb10ba33869f34cfe4cbfb85b22e478269b5f23b5f5f77509b5f4e40d20c242ae0779e308c460f45beb342002ec03afb53e

Download Submit
C:\Program Files\Microsoft Office\Office14\1033\WmiPrvSE.exe

Filesize
1.5MB

MD5
154029aecb8134930418ece2437864b8

SHA1
a43825d5c82e4266a37e60a746c31ab128b2a4a1

SHA256
394c5bdb282b16f8fc323f01c9a0ebe0a3824c95efbc082a5ae7b1d547ab3617

SHA512
2cc0dd8965fb53479fed5107ec2b8ba90ae15dbbc22f1d0d7bffc573cf049d69ce745840fdaa582060940f5be8381cfd5ecec870943d6a3ddda95c9f32a9826c

Download Submit
C:\Windows\AppPatch\de-DE\smss.exe

Filesize
1.5MB

MD5
4e8a6c19aedcc6f021a44e67e36dd398

SHA1
ac2843cc59c332ba148795ddea96a5b171b8d873

SHA256
c01e80cbd7d25ae5504bd4fd03eb6fde2faf0a520a7b645bba63cd212cb4e392

SHA512
7bdaef7415df37add6b4011798030a47a9787734130eacab35cc00fbd04aa2534ba861531d2b56b6d817e27f579a039e9bb2425bd1c70c40cb9ec0fbd85752ed

Download Submit
C:\Windows\Logs\DPX\winlogon.exe

Filesize
1.5MB

MD5
84b195ce8bf506a8bbd1293174866be1

SHA1
467620d5f7cb35e732f95f69cb317b9d964518e0

SHA256
d052f16f1ff0904ca34323705e37358aca2ca578788e7e163b3f9571b10f27be

SHA512
299017f69ad65b640566896464d1f8d4ff3fc72c961b491e54359b0c5b828fbadb10044ceb5dff16713df7312d4927497f393ec32faa122f838323f4aec8efb7

Download Submit
memory/2444-4-0x0000000000AF0000-0x0000000000B00000-memory.dmp

Filesize
64KB

Download
memory/2444-11-0x0000000002310000-0x000000000231A000-memory.dmp

Filesize
40KB

Download
memory/2444-6-0x00000000020C0000-0x00000000020D0000-memory.dmp

Filesize
64KB

Download
memory/2444-7-0x00000000021D0000-0x00000000021DC000-memory.dmp

Filesize
48KB

Download
memory/2444-8-0x00000000022E0000-0x00000000022EC000-memory.dmp

Filesize
48KB

Download
memory/2444-9-0x00000000022F0000-0x00000000022FE000-memory.dmp

Filesize
56KB

Download
memory/2444-10-0x0000000002300000-0x000000000230E000-memory.dmp

Filesize
56KB

Download
memory/2444-5-0x00000000020A0000-0x00000000020B6000-memory.dmp

Filesize
88KB

Download
memory/2444-0-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

Filesize
4KB

Download
memory/2444-3-0x00000000004E0000-0x00000000004FC000-memory.dmp

Filesize
112KB

Download
memory/2444-2-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

Filesize
9.9MB

Download
memory/2444-1-0x0000000000B00000-0x0000000000C92000-memory.dmp

Filesize
1.6MB

Download
memory/2444-90-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

Filesize
9.9MB

Download
memory/2808-89-0x0000000001070000-0x0000000001202000-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