dcrat | 44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd

General

Target

44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe
Size

1002KB
MD5

207bc42f918e624c6cbb55afd7838f36
SHA1

e807453a5d2aa9408af19e056d232f1308d4a61d
SHA256

44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd
SHA512

8384b670f55ad02224bc01643dc157481b177b57deaaee7782a1b948edc9babe1e9885b17c82af3abad1eb7a3485290f41f236aa45a5a324469c1c90d93a7490
SSDEEP

24576:0HblYzEUfgfAF78QWWQx+oPmLdaqgFlInS9:w2lNtdaqGD

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

Process spawned unexpected child process 12 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	840	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1612	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3604	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1664	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4324	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3684	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1500	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4228	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4532	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4932	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3720	4900	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3020	4900	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/760-1-0x0000000000F20000-0x0000000001022000-memory.dmp	dcrat
behavioral2/files/0x0009000000023489-21.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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe

Executes dropped EXE 1 IoCs

pid	Process
5096	fontdrvhost.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\WindowsPowerShell\Configuration\services.exe	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe
File created	C:\Program Files\WindowsPowerShell\Configuration\c5b4cb5e9653cc	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\INF\smss.exe	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe
File created	C:\Windows\INF\69ddcba757bf72	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.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-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3020	schtasks.exe
840	schtasks.exe
3604	schtasks.exe
4324	schtasks.exe
3684	schtasks.exe
4932	schtasks.exe
3720	schtasks.exe
1612	schtasks.exe
1664	schtasks.exe
1500	schtasks.exe
4228	schtasks.exe
4532	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
760	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe
5096	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	760	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe
Token: SeDebugPrivilege	5096	fontdrvhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 2832	760	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe	95
PID 760 wrote to memory of 2832	760	44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe	95
PID 2832 wrote to memory of 1504	2832	cmd.exe	97
PID 2832 wrote to memory of 1504	2832	cmd.exe	97
PID 2832 wrote to memory of 5096	2832	cmd.exe	98
PID 2832 wrote to memory of 5096	2832	cmd.exe	98

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\44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.exe
"C:\Users\Admin\AppData\Local\Temp\44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd.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:760
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\sm3dfVlr9M.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1504
- - C:\Users\Public\Downloads\fontdrvhost.exe
    "C:\Users\Public\Downloads\fontdrvhost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5096

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Users\Public\Downloads\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:840

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Public\Downloads\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 13 /tr "'C:\Users\Public\Downloads\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Windows\INF\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\INF\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4324

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Windows\INF\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 6 /tr "'C:\Program Files\WindowsPowerShell\Configuration\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1500

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\WindowsPowerShell\Configuration\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4228

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 12 /tr "'C:\Program Files\WindowsPowerShell\Configuration\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 7 /tr "'C:\Users\All Users\ssh\unsecapp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4932

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Users\All Users\ssh\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\ssh\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3020

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:\Users\Admin\AppData\Local\Temp\sm3dfVlr9M.bat

Filesize
206B

MD5
a820a06724979cf4ba40106c4f753fd0

SHA1
886209cda4e0bc23fddf208822e24c6bfcfd43b7

SHA256
8925b7b1f93037296d953fe3c40f4f1d75861bf49f9ec851e4efbf9569d04045

SHA512
1f49e5fbe38c13ad763d253fe9b271bebfe929f351889acddcd63d78d8e0a658a6539c81d9824b15c6c0ee75ce901ff0399d14ba344141bcfbb8f2c349adce05

Download Submit
C:\Users\Public\Downloads\fontdrvhost.exe

Filesize
1002KB

MD5
207bc42f918e624c6cbb55afd7838f36

SHA1
e807453a5d2aa9408af19e056d232f1308d4a61d

SHA256
44c0a9eca72bba742f1b8018e870c51b079b76496a34ca1605788cf2c5c3c1bd

SHA512
8384b670f55ad02224bc01643dc157481b177b57deaaee7782a1b948edc9babe1e9885b17c82af3abad1eb7a3485290f41f236aa45a5a324469c1c90d93a7490

Download Submit
memory/760-0-0x00007FFC72B73000-0x00007FFC72B75000-memory.dmp

Filesize
8KB

Download
memory/760-1-0x0000000000F20000-0x0000000001022000-memory.dmp

Filesize
1.0MB

Download
memory/760-2-0x00007FFC72B70000-0x00007FFC73631000-memory.dmp

Filesize
10.8MB

Download
memory/760-3-0x0000000003200000-0x000000000321C000-memory.dmp

Filesize
112KB

Download
memory/760-4-0x000000001C2F0000-0x000000001C340000-memory.dmp

Filesize
320KB

Download
memory/760-19-0x00007FFC72B70000-0x00007FFC73631000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads