dcrat | 6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fd

General

Target

6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Size

784KB
MD5

de823afda19d28d9868a69153f623070
SHA1

9dc57b5bfd50f833432646b5a482e31801297b44
SHA256

6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fd
SHA512

10b5ced20ffb9082e211245eaf4a002dfab0faf5106f449719529f345be1f2b25a538cd61636d09d6b6326be575cc45c78a8a7c33a3c864f2c376e0996cf71c4
SSDEEP

12288:eqnO8YpD1oOJp+Ce1PSiG2jfIBoI5DyDwYMDxFesH0ioBw7oKk2:e+ORToOWSi5gBoS4wYUJ0eo2

Score

10^/10

dcrat evasion infostealer persistence rat trojan

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 5 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	2480	3024	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2940	3024	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2852	3024	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2880	3024	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2724	3024	schtasks.exe	30

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1968-1-0x0000000000BB0000-0x0000000000C7A000-memory.dmp	dcrat
behavioral1/files/0x0006000000016d6f-32.dat	dcrat
behavioral1/memory/1212-79-0x0000000000FD0000-0x000000000109A000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1212	lsm.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\ProgramData\\Microsoft Help\\csrss.exe\""	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\NlsLexicons0007\\dllhost.exe\""	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\ExplorerFrame\\lsm.exe\""	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\TimeDateMUICallback\\csrss.exe\""	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\SetupExe(20241023170646928)\\6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe\""	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\NlsLexicons0007\dllhost.exe	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File created	C:\Windows\System32\TimeDateMUICallback\csrss.exe	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File created	C:\Windows\System32\TimeDateMUICallback\886983d96e3d3e31032c679b2d4ea91b6c05afef	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File opened for modification	C:\Windows\System32\NlsLexicons0007\RCXA2F4.tmp	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File opened for modification	C:\Windows\System32\ExplorerFrame\lsm.exe	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File created	C:\Windows\System32\NlsLexicons0007\dllhost.exe	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File created	C:\Windows\System32\NlsLexicons0007\5940a34987c99120d96dace90a3f93f329dcad63	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File created	C:\Windows\System32\ExplorerFrame\lsm.exe	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File created	C:\Windows\System32\ExplorerFrame\101b941d020240259ca4912829b53995ad543df6	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File opened for modification	C:\Windows\System32\ExplorerFrame\RCXA4F8.tmp	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File opened for modification	C:\Windows\System32\TimeDateMUICallback\RCXA71B.tmp	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
File opened for modification	C:\Windows\System32\TimeDateMUICallback\csrss.exe	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.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 5 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2940	schtasks.exe
2852	schtasks.exe
2880	schtasks.exe
2724	schtasks.exe
2480	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Token: SeDebugPrivilege	1212	lsm.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 1212	1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe	36
PID 1968 wrote to memory of 1212	1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe	36
PID 1968 wrote to memory of 1212	1968	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe	36

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe

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\6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe
"C:\Users\Admin\AppData\Local\Temp\6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe"
1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1968
- C:\Windows\System32\ExplorerFrame\lsm.exe
  "C:\Windows\System32\ExplorerFrame\lsm.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\NlsLexicons0007\dllhost.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 "lsm" /sc ONLOGON /tr "'C:\Windows\System32\ExplorerFrame\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\TimeDateMUICallback\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\SetupExe(20241023170646928)\6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fdN.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\ProgramData\Microsoft Help\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2724

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Microsoft Help\csrss.exe

Filesize
784KB

MD5
de823afda19d28d9868a69153f623070

SHA1
9dc57b5bfd50f833432646b5a482e31801297b44

SHA256
6932a63853e3107a6fc6aba076776ff370d6d79dc076e457eafcc5c6a2b2d9fd

SHA512
10b5ced20ffb9082e211245eaf4a002dfab0faf5106f449719529f345be1f2b25a538cd61636d09d6b6326be575cc45c78a8a7c33a3c864f2c376e0996cf71c4

Download Submit
memory/1212-79-0x0000000000FD0000-0x000000000109A000-memory.dmp

Filesize
808KB

Download
memory/1968-17-0x00000000020E0000-0x00000000020E8000-memory.dmp

Filesize
32KB

Download
memory/1968-1-0x0000000000BB0000-0x0000000000C7A000-memory.dmp

Filesize
808KB

Download
memory/1968-5-0x00000000003E0000-0x00000000003F0000-memory.dmp

Filesize
64KB

Download
memory/1968-4-0x00000000003D0000-0x00000000003D8000-memory.dmp

Filesize
32KB

Download
memory/1968-10-0x0000000000570000-0x0000000000578000-memory.dmp

Filesize
32KB

Download
memory/1968-9-0x0000000000560000-0x000000000056A000-memory.dmp

Filesize
40KB

Download
memory/1968-8-0x0000000000550000-0x000000000055A000-memory.dmp

Filesize
40KB

Download
memory/1968-7-0x0000000000520000-0x000000000052C000-memory.dmp

Filesize
48KB

Download
memory/1968-6-0x0000000000500000-0x0000000000508000-memory.dmp

Filesize
32KB

Download
memory/1968-11-0x0000000000510000-0x0000000000518000-memory.dmp

Filesize
32KB

Download
memory/1968-12-0x0000000000530000-0x0000000000538000-memory.dmp

Filesize
32KB

Download
memory/1968-13-0x0000000000540000-0x0000000000548000-memory.dmp

Filesize
32KB

Download
memory/1968-80-0x000007FEF67F0000-0x000007FEF71DC000-memory.dmp

Filesize
9.9MB

Download
memory/1968-3-0x00000000003C0000-0x00000000003C8000-memory.dmp

Filesize
32KB

Download
memory/1968-21-0x0000000002120000-0x000000000212C000-memory.dmp

Filesize
48KB

Download
memory/1968-15-0x00000000020C0000-0x00000000020C8000-memory.dmp

Filesize
32KB

Download
memory/1968-14-0x0000000002090000-0x0000000002098000-memory.dmp

Filesize
32KB

Download
memory/1968-20-0x00000000020F0000-0x00000000020F8000-memory.dmp

Filesize
32KB

Download
memory/1968-18-0x0000000002100000-0x0000000002108000-memory.dmp

Filesize
32KB

Download
memory/1968-19-0x0000000002080000-0x0000000002088000-memory.dmp

Filesize
32KB

Download
memory/1968-22-0x0000000000790000-0x0000000000798000-memory.dmp

Filesize
32KB

Download
memory/1968-25-0x000007FEF67F0000-0x000007FEF71DC000-memory.dmp

Filesize
9.9MB

Download
memory/1968-2-0x000007FEF67F0000-0x000007FEF71DC000-memory.dmp

Filesize
9.9MB

Download
memory/1968-43-0x000007FEF67F0000-0x000007FEF71DC000-memory.dmp

Filesize
9.9MB

Download
memory/1968-63-0x000007FEF67F0000-0x000007FEF71DC000-memory.dmp

Filesize
9.9MB

Download
memory/1968-16-0x00000000020D0000-0x00000000020D8000-memory.dmp

Filesize
32KB

Download
memory/1968-78-0x000007FEF67F0000-0x000007FEF71DC000-memory.dmp

Filesize
9.9MB

Download
memory/1968-0-0x000007FEF67F3000-0x000007FEF67F4000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads