dcrat | 8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243

General

Target

8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
Size

828KB
MD5

18b132b3bb8258358bbef60b2807923c
SHA1

1a6dea54b8dbaafc894c426425f3f207fa7df156
SHA256

8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243
SHA512

fc909490a131af1d724253bacbb44d516460190725e5f2d742ce0c53568cb3499ef5fb541b6ecc99ebe5a3a04f6636d4423305579fee17e2f108e884e6335964
SSDEEP

12288:3PrWRdiFHcEtCJpDod8Guj/ban6rBPgNrCDbAz8zckbh:3PrfF8EteW8GujM6YIz3V

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 18 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	4628	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2244	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4884	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4192	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2260	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4336	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2644	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4720	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4248	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2284	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	672	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1728	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4764	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4492	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1980	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3148	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2980	4984	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3868	4984	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/3288-1-0x0000000000020000-0x00000000000F6000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cbe-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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe

Executes dropped EXE 1 IoCs

pid	Process
1460	csrss.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Internet Explorer\explorer.exe	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
File opened for modification	C:\Program Files (x86)\Internet Explorer\explorer.exe	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
File created	C:\Program Files (x86)\Internet Explorer\7a0fd90576e088	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
File created	C:\Program Files\Google\spoolsv.exe	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
File created	C:\Program Files\Google\f3b6ecef712a24	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
File created	C:\Program Files\Windows Media Player\csrss.exe	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
File created	C:\Program Files\Windows Media Player\886983d96e3d3e	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.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 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
672	schtasks.exe
2980	schtasks.exe
4628	schtasks.exe
4336	schtasks.exe
4720	schtasks.exe
4192	schtasks.exe
4764	schtasks.exe
3868	schtasks.exe
4492	schtasks.exe
1980	schtasks.exe
3148	schtasks.exe
2244	schtasks.exe
2644	schtasks.exe
4248	schtasks.exe
1728	schtasks.exe
4884	schtasks.exe
2260	schtasks.exe
2284	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
1460	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
Token: SeDebugPrivilege	1460	csrss.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 1460	3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe	101
PID 3288 wrote to memory of 1460	3288	8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe	101

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\8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe
"C:\Users\Admin\AppData\Local\Temp\8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Program Files\Windows Media Player\csrss.exe
  "C:\Program Files\Windows Media Player\csrss.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Internet Explorer\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4628

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2244

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Internet Explorer\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default User\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2260

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4336

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2644

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4248

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files\Google\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2284

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Google\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:672

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Program Files\Google\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4492

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Media Player\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Windows Media Player\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Media Player\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3868

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\sihost.exe

Filesize
828KB

MD5
18b132b3bb8258358bbef60b2807923c

SHA1
1a6dea54b8dbaafc894c426425f3f207fa7df156

SHA256
8fe2dc79406633301e735531a3ba11b1136838ccfb21ab149b06115f36ee3243

SHA512
fc909490a131af1d724253bacbb44d516460190725e5f2d742ce0c53568cb3499ef5fb541b6ecc99ebe5a3a04f6636d4423305579fee17e2f108e884e6335964

Download Submit
memory/3288-0-0x00007FFA105F3000-0x00007FFA105F5000-memory.dmp

Filesize
8KB

Download
memory/3288-1-0x0000000000020000-0x00000000000F6000-memory.dmp

Filesize
856KB

Download
memory/3288-2-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download
memory/3288-26-0x00007FFA105F0000-0x00007FFA110B1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads