dcrat | 79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526

General

Target

79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
Size

1001KB
MD5

5313e2143d6c1f978638038f19f29e6b
SHA1

c70695edf05d60e4726fcdd905ff23248b7ba1dd
SHA256

79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526
SHA512

1b6293810afd89fee0b93a73a6ae73844677f98a7e1cff389637d56dbf908e2f20556765cb95d77156fd704c154f224920bec666deb23b5972b9ed0dcdb4e76b
SSDEEP

12288:9gSCIO3J+/FC3kveKD/FefpE/PZpaf0UPIvJ+0DELw4X7x2tTtUG4:9xCIOgFC3kveIFnPMhG3EEOAvUG4

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 21 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	4488	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1992	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3016	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3900	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3408	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4156	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4308	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1848	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4080	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3836	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2676	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1384	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3896	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3592	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	976	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3752	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1288	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4032	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4688	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1952	4324	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4412	4324	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4716-1-0x0000000000890000-0x0000000000992000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cb5-13.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe

Executes dropped EXE 1 IoCs

pid	Process
4272	RuntimeBroker.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows NT\Accessories\ja-JP\9e8d7a4ca61bd9	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
File created	C:\Program Files\Windows NT\Accessories\ja-JP\RuntimeBroker.exe	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\PLA\Rules\en-US\unsecapp.exe	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
File opened for modification	C:\Windows\PLA\Rules\en-US\unsecapp.exe	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
File created	C:\Windows\PLA\Rules\en-US\29c1c3cc0f7685	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.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-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 21 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4688	schtasks.exe
4488	schtasks.exe
1992	schtasks.exe
1848	schtasks.exe
3896	schtasks.exe
3592	schtasks.exe
4080	schtasks.exe
3836	schtasks.exe
976	schtasks.exe
1288	schtasks.exe
4032	schtasks.exe
1952	schtasks.exe
4412	schtasks.exe
3900	schtasks.exe
3408	schtasks.exe
4308	schtasks.exe
2676	schtasks.exe
1384	schtasks.exe
3016	schtasks.exe
4156	schtasks.exe
3752	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
4272	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
Token: SeDebugPrivilege	4272	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4716 wrote to memory of 3304	4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe	106
PID 4716 wrote to memory of 3304	4716	79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe	106
PID 3304 wrote to memory of 948	3304	cmd.exe	108
PID 3304 wrote to memory of 948	3304	cmd.exe	108
PID 3304 wrote to memory of 4272	3304	cmd.exe	115
PID 3304 wrote to memory of 4272	3304	cmd.exe	115

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\79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.exe
"C:\Users\Admin\AppData\Local\Temp\79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526.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:4716
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\HjQK8aO9M1.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3304
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:948
- - C:\Program Files\Windows NT\Accessories\ja-JP\RuntimeBroker.exe
    "C:\Program Files\Windows NT\Accessories\ja-JP\RuntimeBroker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4272

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 5 /tr "'C:\Windows\PLA\Rules\en-US\unsecapp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4488

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\PLA\Rules\en-US\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 6 /tr "'C:\Windows\PLA\Rules\en-US\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows NT\Accessories\ja-JP\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3900

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\ja-JP\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3408

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows NT\Accessories\ja-JP\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4156

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Users\Public\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Public\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Users\Public\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4080

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\Oracle\Java\.oracle_jre_usage\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Users\All Users\Oracle\Java\.oracle_jre_usage\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Users\All Users\Oracle\Java\.oracle_jre_usage\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1384

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Saved Games\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Default\Saved Games\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Users\Default\Saved Games\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Users\Default\My Documents\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Default\My Documents\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1288

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Users\Default\My Documents\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Music\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Default\Music\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1952

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 10 /tr "'C:\Users\Default\Music\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4412

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:\Users\Admin\AppData\Local\Temp\HjQK8aO9M1.bat

Filesize
228B

MD5
8a4f36ffd60f5058275ade63b2b04583

SHA1
743174e20e82707e1ce5ac3aac7479ea3a85acb0

SHA256
fcb431bc30e2dc39f169ab59ca404ee0c8b4f6b7ac276de2da3f449f1391bd1a

SHA512
4d5a40a72f6a42e415a61f6ec02c3f4597872f0bf11b2d0fb095516b8719c036c0d39cb1a315bbee53944b7517aa1c293da3cb726f9a6076ec6773f851a90dc1

Download Submit
C:\Users\Default\Saved Games\smss.exe

Filesize
1001KB

MD5
5313e2143d6c1f978638038f19f29e6b

SHA1
c70695edf05d60e4726fcdd905ff23248b7ba1dd

SHA256
79dae0f514b2233117f467b8853affc5c050e71621761b5bca2a7f002c1ca526

SHA512
1b6293810afd89fee0b93a73a6ae73844677f98a7e1cff389637d56dbf908e2f20556765cb95d77156fd704c154f224920bec666deb23b5972b9ed0dcdb4e76b

Download Submit
memory/4716-0-0x00007FFF17D33000-0x00007FFF17D35000-memory.dmp

Filesize
8KB

Download
memory/4716-1-0x0000000000890000-0x0000000000992000-memory.dmp

Filesize
1.0MB

Download
memory/4716-2-0x00007FFF17D30000-0x00007FFF187F1000-memory.dmp

Filesize
10.8MB

Download
memory/4716-3-0x0000000002A60000-0x0000000002A7C000-memory.dmp

Filesize
112KB

Download
memory/4716-4-0x000000001B640000-0x000000001B690000-memory.dmp

Filesize
320KB

Download
memory/4716-24-0x00007FFF17D30000-0x00007FFF187F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads