dcrat | da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59

General

Target

da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
Size

829KB
MD5

cbadabd5f33ef27c7859a83fc1a2c973
SHA1

a155b4f7e2df225012b3f416ac13c2aab696f240
SHA256

da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59
SHA512

bf87a61b9a65f9c42d3bcf057ba08b328dffad7b50a49a34806a66585411849f4335336932fbfa88ec422995b394bbc4f4c326f6b9b0a4c0e28d8054057a8972
SSDEEP

24576:/8snXXpIYvwMS2AKO99fP7NvujxVMzMx:/8s1vmvM

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 18 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	2560	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2552	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2728	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2444	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2744	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1732	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2432	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2480	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2984	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3000	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	536	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	768	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1000	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1404	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	556	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2596	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2824	2692	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2804	2692	schtasks.exe	28

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2736-1-0x00000000000D0000-0x00000000001A6000-memory.dmp	dcrat
behavioral1/files/0x00080000000156b8-11.dat	dcrat
behavioral1/memory/2404-23-0x0000000000CB0000-0x0000000000D86000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2404	smss.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Reference Assemblies\explorer.exe	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
File created	C:\Program Files (x86)\Reference Assemblies\7a0fd90576e088	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
File created	C:\Program Files (x86)\Windows Media Player\Network Sharing\services.exe	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
File created	C:\Program Files (x86)\Windows Media Player\Network Sharing\c5b4cb5e9653cc	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
File created	C:\Program Files\Windows Portable Devices\smss.exe	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
File created	C:\Program Files\Windows Portable Devices\69ddcba757bf72	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
File created	C:\Program Files (x86)\Reference Assemblies\explorer.exe	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
556	schtasks.exe
1404	schtasks.exe
2728	schtasks.exe
2744	schtasks.exe
1732	schtasks.exe
2432	schtasks.exe
536	schtasks.exe
2824	schtasks.exe
2480	schtasks.exe
3000	schtasks.exe
768	schtasks.exe
1000	schtasks.exe
2596	schtasks.exe
2560	schtasks.exe
2552	schtasks.exe
2444	schtasks.exe
2984	schtasks.exe
2804	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2736	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
2404	smss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
Token: SeDebugPrivilege	2404	smss.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 1892	2736	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe	47
PID 2736 wrote to memory of 1892	2736	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe	47
PID 2736 wrote to memory of 1892	2736	da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe	47
PID 1892 wrote to memory of 2244	1892	cmd.exe	49
PID 1892 wrote to memory of 2244	1892	cmd.exe	49
PID 1892 wrote to memory of 2244	1892	cmd.exe	49
PID 1892 wrote to memory of 2404	1892	cmd.exe	50
PID 1892 wrote to memory of 2404	1892	cmd.exe	50
PID 1892 wrote to memory of 2404	1892	cmd.exe	50

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\da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe
"C:\Users\Admin\AppData\Local\Temp\da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\Jtvgn0Xmse.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2244
- - C:\Program Files\Windows Portable Devices\smss.exe
    "C:\Program Files\Windows Portable Devices\smss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Reference Assemblies\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2560

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Reference Assemblies\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2444

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Admin\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1732

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2432

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2480

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Recovery\209d6542-69f6-11ef-b491-62cb582c238c\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Media Player\Network Sharing\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\Network Sharing\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:536

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Windows Media Player\Network Sharing\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Users\Public\Documents\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Users\Public\Documents\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 5 /tr "'C:\Users\Public\Documents\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Portable Devices\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Windows Portable Devices\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Portable Devices\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2804

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Jtvgn0Xmse.bat

Filesize
215B

MD5
363c07757fb33995a451c031c224b101

SHA1
28d12e2277eebec2790c3108a34a80c029fa1cd5

SHA256
21baebb7b29299c37ca520f6af45b34ecc428e387bde1468f91d03926a3750ff

SHA512
a45915416ab74a06af128f6234410ca0b966d2b5579bef25ed8e394a484eab4b0977ff8b15ab6a6b7b78cd96146cf64a759ca132bb32bff6d8ab77326624366c

Download Submit
C:\Users\Public\Documents\explorer.exe

Filesize
829KB

MD5
cbadabd5f33ef27c7859a83fc1a2c973

SHA1
a155b4f7e2df225012b3f416ac13c2aab696f240

SHA256
da044c033d375095443875b680b1de847b251d30e55e68fb8e3735c25286bb59

SHA512
bf87a61b9a65f9c42d3bcf057ba08b328dffad7b50a49a34806a66585411849f4335336932fbfa88ec422995b394bbc4f4c326f6b9b0a4c0e28d8054057a8972

Download Submit
memory/2404-23-0x0000000000CB0000-0x0000000000D86000-memory.dmp

Filesize
856KB

Download
memory/2736-0-0x000007FEF5693000-0x000007FEF5694000-memory.dmp

Filesize
4KB

Download
memory/2736-1-0x00000000000D0000-0x00000000001A6000-memory.dmp

Filesize
856KB

Download
memory/2736-2-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

Filesize
9.9MB

Download
memory/2736-20-0x000007FEF5690000-0x000007FEF607C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads