dcrat | 2c1c9222242148483befec88bb981d11b1736abe489f0005bd3a3d921329b772

Analysis

max time kernel
95s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19/01/2025, 21:01

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General

Target

ec9c92645e4178fda49d0a3aecd70b39.exe
Size

315KB
MD5

ec9c92645e4178fda49d0a3aecd70b39
SHA1

ec0c8e353318c041da25c11c4d9cc593519137d8
SHA256

2c1c9222242148483befec88bb981d11b1736abe489f0005bd3a3d921329b772
SHA512

d96c7dfba3094507bd4e9d4ee23ae08c221f011131b2ba7ffa3b97edc0934e4056ebdb6623171bc9b52d77ddd9e34e265ea953cd1547b3c83703aece766c9a8f
SSDEEP

6144:2dsy2oo7KrfynB80ZhrabrFyA/5Txe0M/Lmld4pQdxTbkr9u:2P2N7KKS0ZXA/HF06dx8Z

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 27 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	4732	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1268	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1896	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1840	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5016	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	232	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3040	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2892	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4748	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4328	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4140	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2904	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4692	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3152	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	864	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4992	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4552	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3656	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4716	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3940	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3984	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	636	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3052	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1688	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4032	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2244	2460	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1456	2460	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1520-1-0x0000000000BD0000-0x0000000000C26000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cb0-11.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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	ec9c92645e4178fda49d0a3aecd70b39.exe

Executes dropped EXE 1 IoCs

pid	Process
1792	unsecapp.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\MSBuild\RuntimeBroker.exe	ec9c92645e4178fda49d0a3aecd70b39.exe
File created	C:\Program Files (x86)\MSBuild\9e8d7a4ca61bd9	ec9c92645e4178fda49d0a3aecd70b39.exe
File created	C:\Program Files\Uninstall Information\Registry.exe	ec9c92645e4178fda49d0a3aecd70b39.exe
File opened for modification	C:\Program Files\Uninstall Information\Registry.exe	ec9c92645e4178fda49d0a3aecd70b39.exe
File created	C:\Program Files\Uninstall Information\ee2ad38f3d4382	ec9c92645e4178fda49d0a3aecd70b39.exe
File created	C:\Program Files (x86)\Google\Temp\wininit.exe	ec9c92645e4178fda49d0a3aecd70b39.exe
File created	C:\Program Files (x86)\Google\Temp\56085415360792	ec9c92645e4178fda49d0a3aecd70b39.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Migration\WTR\69ddcba757bf72	ec9c92645e4178fda49d0a3aecd70b39.exe
File created	C:\Windows\Migration\WTR\smss.exe	ec9c92645e4178fda49d0a3aecd70b39.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-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	ec9c92645e4178fda49d0a3aecd70b39.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 27 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
864	schtasks.exe
3984	schtasks.exe
3052	schtasks.exe
4748	schtasks.exe
4140	schtasks.exe
2904	schtasks.exe
1840	schtasks.exe
2892	schtasks.exe
1268	schtasks.exe
1688	schtasks.exe
1456	schtasks.exe
4716	schtasks.exe
4032	schtasks.exe
2244	schtasks.exe
3152	schtasks.exe
1896	schtasks.exe
4992	schtasks.exe
3040	schtasks.exe
4692	schtasks.exe
636	schtasks.exe
4732	schtasks.exe
232	schtasks.exe
4328	schtasks.exe
3656	schtasks.exe
3940	schtasks.exe
5016	schtasks.exe
4552	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1520	ec9c92645e4178fda49d0a3aecd70b39.exe
1792	unsecapp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	ec9c92645e4178fda49d0a3aecd70b39.exe
Token: SeDebugPrivilege	1792	unsecapp.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2064	1520	ec9c92645e4178fda49d0a3aecd70b39.exe	111
PID 1520 wrote to memory of 2064	1520	ec9c92645e4178fda49d0a3aecd70b39.exe	111
PID 2064 wrote to memory of 2128	2064	cmd.exe	113
PID 2064 wrote to memory of 2128	2064	cmd.exe	113
PID 2064 wrote to memory of 1792	2064	cmd.exe	115
PID 2064 wrote to memory of 1792	2064	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\ec9c92645e4178fda49d0a3aecd70b39.exe
"C:\Users\Admin\AppData\Local\Temp\ec9c92645e4178fda49d0a3aecd70b39.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:1520
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\JYPNpOSKsk.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2064
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2128
- - C:\Recovery\WindowsRE\unsecapp.exe
    "C:\Recovery\WindowsRE\unsecapp.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 7 /tr "'C:\Program Files\Uninstall Information\Registry.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4732

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\Registry.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1268

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 5 /tr "'C:\Program Files\Uninstall Information\Registry.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1896

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1840

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5016

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:232

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3040

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:2892

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:4748

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Google\Temp\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4328

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Temp\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4140

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Google\Temp\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Windows\Migration\WTR\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\Migration\WTR\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3152

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Windows\Migration\WTR\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\MSBuild\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\MSBuild\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\MSBuild\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.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 "csrssc" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\JYPNpOSKsk.bat

Filesize
199B

MD5
e35514da27ed00f774d50693cf3db6d9

SHA1
5c4d357e31e42b1e3c749a439fba66c8e24d5997

SHA256
b52094402452f652c5188583fd4b04f68fbf0327dff74e4dc2edbf963cdfc990

SHA512
c1176092b667aacd619c14299617ec024eaf1c88008a95a851726173a128fecd39c58449bf841c859e7e9403453f54e3bd554a395a2ba643a1d687d03c5d338c

Download Submit
C:\Windows\Migration\WTR\smss.exe

Filesize
315KB

MD5
ec9c92645e4178fda49d0a3aecd70b39

SHA1
ec0c8e353318c041da25c11c4d9cc593519137d8

SHA256
2c1c9222242148483befec88bb981d11b1736abe489f0005bd3a3d921329b772

SHA512
d96c7dfba3094507bd4e9d4ee23ae08c221f011131b2ba7ffa3b97edc0934e4056ebdb6623171bc9b52d77ddd9e34e265ea953cd1547b3c83703aece766c9a8f

Download Submit
memory/1520-0-0x00007FFEEDD43000-0x00007FFEEDD45000-memory.dmp

Filesize
8KB

Download
memory/1520-1-0x0000000000BD0000-0x0000000000C26000-memory.dmp

Filesize
344KB

Download
memory/1520-4-0x00007FFEEDD40000-0x00007FFEEE801000-memory.dmp

Filesize
10.8MB

Download
memory/1520-26-0x00007FFEEDD40000-0x00007FFEEE801000-memory.dmp

Filesize
10.8MB

Download