dcrat | 75bfc36e8b50cca42624747cf33c16a7003e2734efd21517d4691a126edf0db7

General

Target

28ad3765ae12249efa6e1b0ab7911f78.exe
Size

826KB
MD5

28ad3765ae12249efa6e1b0ab7911f78
SHA1

46243e90e99fde5dcd81aba6b1c05c3c9b7a7d3d
SHA256

75bfc36e8b50cca42624747cf33c16a7003e2734efd21517d4691a126edf0db7
SHA512

d63d54d58bb9878f650fe95b25b6c7ca10610d57eca18fdaea90726a0ae5a8defbf69a7a3190ff47074c24f5e333ee6e8a5fceffba2c1a7147335682eefd4de3
SSDEEP

12288:jPio/EcS0dyQWtnLZMvWIgoY0b5/5X0QYXE95:j3/EcS0dYtnLZMvXXb5/SJU5

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 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	4760	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3636	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4312	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2204	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3896	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4172	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2440	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3312	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	900	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1436	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3196	2124	schtasks.exe	85
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3388	2124	schtasks.exe	85

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4064-1-0x00000000005A0000-0x0000000000676000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cca-18.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	28ad3765ae12249efa6e1b0ab7911f78.exe

Executes dropped EXE 1 IoCs

pid	Process
2908	spoolsv.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Portable Devices\spoolsv.exe	28ad3765ae12249efa6e1b0ab7911f78.exe
File created	C:\Program Files\Windows Portable Devices\f3b6ecef712a24	28ad3765ae12249efa6e1b0ab7911f78.exe
File created	C:\Program Files\Common Files\DESIGNER\services.exe	28ad3765ae12249efa6e1b0ab7911f78.exe
File created	C:\Program Files\Common Files\DESIGNER\c5b4cb5e9653cc	28ad3765ae12249efa6e1b0ab7911f78.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-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	28ad3765ae12249efa6e1b0ab7911f78.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
3636	schtasks.exe
4312	schtasks.exe
2204	schtasks.exe
3312	schtasks.exe
3196	schtasks.exe
4760	schtasks.exe
3896	schtasks.exe
4172	schtasks.exe
2440	schtasks.exe
900	schtasks.exe
1436	schtasks.exe
3388	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4064	28ad3765ae12249efa6e1b0ab7911f78.exe
4064	28ad3765ae12249efa6e1b0ab7911f78.exe
4064	28ad3765ae12249efa6e1b0ab7911f78.exe
4064	28ad3765ae12249efa6e1b0ab7911f78.exe
4064	28ad3765ae12249efa6e1b0ab7911f78.exe
2908	spoolsv.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4064	28ad3765ae12249efa6e1b0ab7911f78.exe
Token: SeDebugPrivilege	2908	spoolsv.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 1948	4064	28ad3765ae12249efa6e1b0ab7911f78.exe	98
PID 4064 wrote to memory of 1948	4064	28ad3765ae12249efa6e1b0ab7911f78.exe	98
PID 1948 wrote to memory of 4712	1948	cmd.exe	100
PID 1948 wrote to memory of 4712	1948	cmd.exe	100
PID 1948 wrote to memory of 2908	1948	cmd.exe	102
PID 1948 wrote to memory of 2908	1948	cmd.exe	102

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\28ad3765ae12249efa6e1b0ab7911f78.exe
"C:\Users\Admin\AppData\Local\Temp\28ad3765ae12249efa6e1b0ab7911f78.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4064
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\65o2G5Ax8V.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1948
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:4712
- - C:\Program Files\Windows Portable Devices\spoolsv.exe
    "C:\Program Files\Windows Portable Devices\spoolsv.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2908

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4312

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\Videos\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2204

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Admin\Videos\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\Videos\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4172

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\Program Files\Common Files\DESIGNER\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2440

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\Common Files\DESIGNER\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3312

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 6 /tr "'C:\Program Files\Common Files\DESIGNER\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:900

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Portable Devices\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1436

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Windows Portable Devices\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3196

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Portable Devices\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3388

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:\Program Files\Windows Portable Devices\spoolsv.exe

Filesize
826KB

MD5
28ad3765ae12249efa6e1b0ab7911f78

SHA1
46243e90e99fde5dcd81aba6b1c05c3c9b7a7d3d

SHA256
75bfc36e8b50cca42624747cf33c16a7003e2734efd21517d4691a126edf0db7

SHA512
d63d54d58bb9878f650fe95b25b6c7ca10610d57eca18fdaea90726a0ae5a8defbf69a7a3190ff47074c24f5e333ee6e8a5fceffba2c1a7147335682eefd4de3

Download Submit
C:\Users\Admin\AppData\Local\Temp\65o2G5Ax8V.bat

Filesize
218B

MD5
8a22fa359e94a97b3ef9766a365d12e0

SHA1
1881503c7acee130016599323178fde24c577a05

SHA256
9e1925a760c69acd80583e4f660754afefda367bc7b8eaae529872b5f09a2b07

SHA512
5b3d7ccab7a20547b40c8425f974ef043998e543c2b99114135b56908786cc6c507ab434a0a4279108f1f2c7c20f0d6ccd0b0e99628abe71f6b5a8bfc0ad0758

Download Submit
memory/4064-0-0x00007FF976223000-0x00007FF976225000-memory.dmp

Filesize
8KB

Download
memory/4064-1-0x00000000005A0000-0x0000000000676000-memory.dmp

Filesize
856KB

Download
memory/4064-4-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/4064-16-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads