dcrat | a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf

General

Target

50887c3ed5676401f9cab09d742bbce4.exe
Size

827KB
MD5

50887c3ed5676401f9cab09d742bbce4
SHA1

1e4016e50cffe51614df5a31817d50de7b85af26
SHA256

a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf
SHA512

bd8ec53d02ba47c8656c4260d2112f50755526898b681d1affbd50a6bdda69f01fa78d091ff812d3a25454afd03eca815fea7b869f037b4f492b1d188f376ab2
SSDEEP

12288:2NultHBphsl8LvoS8wXO0DzXLYFlTvyk31:ZHBp+ovohwDeTv131

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	3412	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2408	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	320	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4024	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	432	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3452	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3048	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3936	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4848	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4880	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4012	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1828	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4288	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3020	2780	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4584	2780	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4564-1-0x0000000000B70000-0x0000000000C46000-memory.dmp	dcrat
behavioral2/files/0x000a000000023b84-11.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	50887c3ed5676401f9cab09d742bbce4.exe

Executes dropped EXE 1 IoCs

pid	Process
2812	RuntimeBroker.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe	50887c3ed5676401f9cab09d742bbce4.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe	50887c3ed5676401f9cab09d742bbce4.exe
File created	C:\Program Files (x86)\Windows Sidebar\Gadgets\9e8d7a4ca61bd9	50887c3ed5676401f9cab09d742bbce4.exe
File created	C:\Program Files (x86)\MSBuild\OfficeClickToRun.exe	50887c3ed5676401f9cab09d742bbce4.exe
File created	C:\Program Files (x86)\MSBuild\e6c9b481da804f	50887c3ed5676401f9cab09d742bbce4.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Speech\smss.exe	50887c3ed5676401f9cab09d742bbce4.exe
File created	C:\Windows\Speech\69ddcba757bf72	50887c3ed5676401f9cab09d742bbce4.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000_Classes\Local Settings	50887c3ed5676401f9cab09d742bbce4.exe

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
3452	schtasks.exe
4012	schtasks.exe
2408	schtasks.exe
3936	schtasks.exe
4848	schtasks.exe
4584	schtasks.exe
4024	schtasks.exe
432	schtasks.exe
3048	schtasks.exe
4288	schtasks.exe
3020	schtasks.exe
3412	schtasks.exe
320	schtasks.exe
4880	schtasks.exe
1828	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
4564	50887c3ed5676401f9cab09d742bbce4.exe
2812	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4564	50887c3ed5676401f9cab09d742bbce4.exe
Token: SeDebugPrivilege	2812	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 2020	4564	50887c3ed5676401f9cab09d742bbce4.exe	98
PID 4564 wrote to memory of 2020	4564	50887c3ed5676401f9cab09d742bbce4.exe	98
PID 2020 wrote to memory of 4920	2020	cmd.exe	100
PID 2020 wrote to memory of 4920	2020	cmd.exe	100
PID 2020 wrote to memory of 2812	2020	cmd.exe	101
PID 2020 wrote to memory of 2812	2020	cmd.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\50887c3ed5676401f9cab09d742bbce4.exe
"C:\Users\Admin\AppData\Local\Temp\50887c3ed5676401f9cab09d742bbce4.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\SwwJiUUJDt.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2020
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:4920
- - C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe
    "C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2812

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3412

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2408

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:320

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\MSBuild\OfficeClickToRun.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:432

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\MSBuild\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3452

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3048

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:3936

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Windows\Speech\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\Speech\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4012

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Windows\Speech\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1828

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4288

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Users\All Users\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3020

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4584

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

Replay Monitor

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Downloads

C:\ProgramData\upfc.exe

Filesize
827KB

MD5
50887c3ed5676401f9cab09d742bbce4

SHA1
1e4016e50cffe51614df5a31817d50de7b85af26

SHA256
a22e4b92ef53c22a69ef02fa17403fcdf74d3c4b3efc8d28604040286f4cdedf

SHA512
bd8ec53d02ba47c8656c4260d2112f50755526898b681d1affbd50a6bdda69f01fa78d091ff812d3a25454afd03eca815fea7b869f037b4f492b1d188f376ab2

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

Filesize
229B

MD5
f5230256cdebba7e50c93730ce31d065

SHA1
ec8d94efcce8b5b06838b7bf0b133fd067151f20

SHA256
37b65b1ad4f105ac2eb201f4e0baea19e1831f7edc8c3ad2370423d67c9d7081

SHA512
4dcaf4ac3d76df2141c9ac1b42c21ae54d2aad57a1c0d3799e24f37f6931601e8515ef2d72494be576a8c7d1a5889994aef6717d96ce22fdb696039e3da3195b

Download Submit
memory/4564-0-0x00007FF9862B3000-0x00007FF9862B5000-memory.dmp

Filesize
8KB

Download
memory/4564-1-0x0000000000B70000-0x0000000000C46000-memory.dmp

Filesize
856KB

Download
memory/4564-4-0x00007FF9862B0000-0x00007FF986D71000-memory.dmp

Filesize
10.8MB

Download
memory/4564-18-0x00007FF9862B0000-0x00007FF986D71000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads