dcrat | 51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2

General

Target

51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
Size

413KB
MD5

d42e209f293b2f4551ca20bbfaf685bf
SHA1

5e77d2a5933e32b57ef96464e94d4a2b692f6421
SHA256

51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2
SHA512

62580c3a1524d46c907b6c040d20bb67dbf375bc5c9fb0452bdadb30f21e42b9c1e40f0176ebd6eb437f2f7f47825398febaa147f0cb4459c2b19dbd011d0787
SSDEEP

12288:XQndjOJNp/0+fS4qVleduxRTP42SgJ3H+DEqn:AndjOJbjS4qVleduxRTP42SgBb+

Score

10^/10

dcrat infostealer persistence 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 payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral1/memory/1736-54-0x0000000000860000-0x00000000008CE000-memory.dmp	dcrat
C:\ProgramData\Microsoft Help\WmiPrvSE.exe	dcrat
C:\ProgramData\Microsoft Help\WmiPrvSE.exe	dcrat
behavioral1/memory/1352-64-0x0000000000010000-0x000000000007E000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

Processes:

WmiPrvSE.exe

pid process

1352 WmiPrvSE.exe

pid	process
1352	WmiPrvSE.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Windows\\schemas\\AvailableNetwork\\dwm.exe\""	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Users\\Public\\Favorites\\csrss.exe\""	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Recovery\\ad6fdfc2-6219-11ed-a572-5e34c4ab0fa3\\lsass.exe\""	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\PerfLogs\\Admin\\spoolsv.exe\""	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\PerfLogs\\Admin\\WMIADAP.exe\""	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\ProgramData\\Microsoft Help\\WmiPrvSE.exe\""	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe

Drops file in Windows directory 3 IoCs

Processes:

51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe

description	ioc	process
File created	C:\Windows\schemas\AvailableNetwork\dwm.exe	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
File opened for modification	C:\Windows\schemas\AvailableNetwork\dwm.exe	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
File created	C:\Windows\schemas\AvailableNetwork\6cb0b6c459d5d3455a3da700e713f2e2529862ff	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe

Creates scheduled task(s) 1 TTPs 6 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

1500 schtasks.exe
772 schtasks.exe
1440 schtasks.exe
1572 schtasks.exe
920 schtasks.exe
664 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exeWmiPrvSE.exe

pid process

1736 51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
1352 WmiPrvSE.exe

pid	process
1500	schtasks.exe
772	schtasks.exe
1440	schtasks.exe
1572	schtasks.exe
920	schtasks.exe
664	schtasks.exe

pid	process
1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
1352	WmiPrvSE.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exeWmiPrvSE.exe

description	pid	process
Token: SeDebugPrivilege	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
Token: SeDebugPrivilege	1352	WmiPrvSE.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe

description	pid	process	target process
PID 1736 wrote to memory of 664	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 664	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 664	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1500	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1500	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1500	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 772	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 772	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 772	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1440	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1440	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1440	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1572	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1572	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1572	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 920	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 920	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 920	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	schtasks.exe
PID 1736 wrote to memory of 1352	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	WmiPrvSE.exe
PID 1736 wrote to memory of 1352	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	WmiPrvSE.exe
PID 1736 wrote to memory of 1352	1736	51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe	WmiPrvSE.exe

C:\Users\Admin\AppData\Local\Temp\51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe
"C:\Users\Admin\AppData\Local\Temp\51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\schemas\AvailableNetwork\dwm.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:664

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Public\Favorites\csrss.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1500

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\ad6fdfc2-6219-11ed-a572-5e34c4ab0fa3\lsass.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:772

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "spoolsv" /sc ONLOGON /tr "'C:\PerfLogs\Admin\spoolsv.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1440

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\PerfLogs\Admin\WMIADAP.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1572

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\ProgramData\Microsoft Help\WmiPrvSE.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:920

C:\ProgramData\Microsoft Help\WmiPrvSE.exe
"C:\ProgramData\Microsoft Help\WmiPrvSE.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1352

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\Microsoft Help\WmiPrvSE.exe
Filesize
413KB

MD5
d42e209f293b2f4551ca20bbfaf685bf

SHA1
5e77d2a5933e32b57ef96464e94d4a2b692f6421

SHA256
51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2

SHA512
62580c3a1524d46c907b6c040d20bb67dbf375bc5c9fb0452bdadb30f21e42b9c1e40f0176ebd6eb437f2f7f47825398febaa147f0cb4459c2b19dbd011d0787

Download Submit
C:\ProgramData\Microsoft Help\WmiPrvSE.exe
Filesize
413KB

MD5
d42e209f293b2f4551ca20bbfaf685bf

SHA1
5e77d2a5933e32b57ef96464e94d4a2b692f6421

SHA256
51757c2b6e29dce91c13dc76c9a75fba921144d80adc56e3fb36e3491ad461d2

SHA512
62580c3a1524d46c907b6c040d20bb67dbf375bc5c9fb0452bdadb30f21e42b9c1e40f0176ebd6eb437f2f7f47825398febaa147f0cb4459c2b19dbd011d0787

Download Submit
memory/664-55-0x0000000000000000-mapping.dmp

Download
memory/772-57-0x0000000000000000-mapping.dmp

Download
memory/920-60-0x0000000000000000-mapping.dmp

Download
memory/1352-61-0x0000000000000000-mapping.dmp

Download
memory/1352-64-0x0000000000010000-0x000000000007E000-memory.dmp

Filesize
440KB

Download
memory/1440-58-0x0000000000000000-mapping.dmp

Download
memory/1500-56-0x0000000000000000-mapping.dmp

Download
memory/1572-59-0x0000000000000000-mapping.dmp

Download
memory/1736-54-0x0000000000860000-0x00000000008CE000-memory.dmp

Filesize
440KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads