dcrat | 705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622

General

Target

705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
Size

547KB
MD5

637920e868b2367c5e6517ee4744d3c9
SHA1

09f66f5db717cf9df695bb89d8e2643229379969
SHA256

705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622
SHA512

92846cd4ee57c2be2c5146692defab8f5b4cb58eed5f44ba13b3aa36f537f8454090929618f4ec9104ee90cba8af9aa2340f89dac3ec3d488f30682af2760443
SSDEEP

12288:xqnO30tV2lZu09sR2ia1OgdDG3cSIksYEkQlrBt:x+O3rvZDiUx5r

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 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	2632	2324	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2680	2324	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2792	2324	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2548	2324	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2832	2324	schtasks.exe	31

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2032-1-0x00000000002D0000-0x0000000000360000-memory.dmp	dcrat
behavioral1/files/0x0006000000017403-11.dat	dcrat
behavioral1/memory/2616-21-0x0000000000AA0000-0x0000000000B30000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2616	OSPPSVC.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\sppsvc = "\"C:\\Windows\\System32\\racpldlg\\sppsvc.exe\""	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Documents and Settings\\OSPPSVC.exe\""	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Program Files\\Windows Photo Viewer\\ja-JP\\OSPPSVC.exe\""	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Program Files\\Common Files\\Microsoft Shared\\OfficeSoftwareProtectionPlatform\\OSPPOBJS\\OSPPSVC.exe\""	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Users\\Admin\\dllhost.exe\""	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\System32\racpldlg\sppsvc.exe	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
File opened for modification	C:\Windows\System32\racpldlg\sppsvc.exe	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
File created	C:\Windows\System32\racpldlg\0a1fd5f707cd16ea89afd3d6db52b2da58214a6c	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Photo Viewer\ja-JP\OSPPSVC.exe	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
File created	C:\Program Files\Windows Photo Viewer\ja-JP\1610b97d3ab4a74cd8ae104b51bea7bfcc5b9c6f	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
File created	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\OSPPSVC.exe	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
File created	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\1610b97d3ab4a74cd8ae104b51bea7bfcc5b9c6f	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe

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
2548	schtasks.exe
2832	schtasks.exe
2632	schtasks.exe
2680	schtasks.exe
2792	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2032	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
2032	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
2032	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
2616	OSPPSVC.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
Token: SeDebugPrivilege	2616	OSPPSVC.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2564	2032	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe	37
PID 2032 wrote to memory of 2564	2032	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe	37
PID 2032 wrote to memory of 2564	2032	705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe	37
PID 2564 wrote to memory of 2652	2564	cmd.exe	39
PID 2564 wrote to memory of 2652	2564	cmd.exe	39
PID 2564 wrote to memory of 2652	2564	cmd.exe	39
PID 2564 wrote to memory of 2616	2564	cmd.exe	40
PID 2564 wrote to memory of 2616	2564	cmd.exe	40
PID 2564 wrote to memory of 2616	2564	cmd.exe	40

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\705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe
"C:\Users\Admin\AppData\Local\Temp\705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\UIf4G0azQ0.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2652
- - C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\OSPPSVC.exe
    "C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\OSPPSVC.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2616

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\racpldlg\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Documents and Settings\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPOBJS\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2548

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Admin\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2832

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

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

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\UIf4G0azQ0.bat

Filesize
264B

MD5
5c736cb959a880e60f817f6a2cd5976f

SHA1
98a4060bed345eb0363f4a36b2902011a29942dd

SHA256
0cac63eedacb456132e17bde211949f27f1091bc2e35849189de4522e550cc8b

SHA512
f8bd543db512a9bd091839709d0df9c66fa14b65f31fb10225bc96fd7eac0b42180f3ef0e417c80333332fab441fca3f2f88417283c148e0ce349c6163b428e7

Download Submit
C:\Users\Admin\dllhost.exe

Filesize
547KB

MD5
637920e868b2367c5e6517ee4744d3c9

SHA1
09f66f5db717cf9df695bb89d8e2643229379969

SHA256
705e9214debeb58fba4ec0bf3cea5a08df142f5bbde6d4b82b6646cf3f2a6622

SHA512
92846cd4ee57c2be2c5146692defab8f5b4cb58eed5f44ba13b3aa36f537f8454090929618f4ec9104ee90cba8af9aa2340f89dac3ec3d488f30682af2760443

Download Submit
memory/2032-0-0x000007FEF5C33000-0x000007FEF5C34000-memory.dmp

Filesize
4KB

Download
memory/2032-1-0x00000000002D0000-0x0000000000360000-memory.dmp

Filesize
576KB

Download
memory/2032-2-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

Filesize
9.9MB

Download
memory/2032-18-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

Filesize
9.9MB

Download
memory/2616-21-0x0000000000AA0000-0x0000000000B30000-memory.dmp

Filesize
576KB

Download
memory/2616-22-0x0000000000160000-0x000000000016C000-memory.dmp

Filesize
48KB

Download
memory/2616-23-0x0000000000180000-0x000000000018C000-memory.dmp

Filesize
48KB

Download
memory/2616-24-0x0000000000190000-0x000000000019E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads