dcrat | c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627

General

Target

c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
Size

973KB
MD5

0f03b3a0ca9a75f7b900a4e773020ec0
SHA1

1a952a87fb4e476eb9e111cee8d355e57426aadd
SHA256

c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627
SHA512

f243a27db37556c220032d2f6612193c4577f998e17a35ea9260cd942ff9211d5e12ffa4de8794081b3edd5e789206c147f2d2b9a16ddd82e2fd7b4b8247c6e7
SSDEEP

12288:nhhBMuext92N3cit1RGJV/H0uQ1PjmzBd5EBy10cgZMc29ZxasnLlDD:n5E92NRzO/UFdmBchH29Zsg9

Score

10^/10

dcrat infostealer persistence rat

Malware Config

Signatures

DcRat 6 IoCs

DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

rat infostealer dcrat

pid	Process
2912	schtasks.exe
532	schtasks.exe
2620	schtasks.exe
2596	schtasks.exe
3048	schtasks.exe
2580	schtasks.exe

Dcrat family
dcrat

Process spawned unexpected child process 6 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	2912	2964	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	532	2964	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2620	2964	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2596	2964	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3048	2964	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2580	2964	schtasks.exe	31

Executes dropped EXE 1 IoCs

pid	Process
2464	wininit.exe

Adds Run key to start application 2 TTPs 6 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\explorer = "\"C:\\PerfLogs\\Admin\\explorer.exe\""	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\C_932\\csrss.exe\""	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\audiodg = "\"C:\\PerfLogs\\Admin\\audiodg.exe\""	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\MSOCache\\All Users\\{90140000-0011-0000-0000-0000000FF1CE}-C\\sppsvc.exe\""	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\System32\\idndl\\wininit.exe\""	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Program Files\\Internet Explorer\\taskhost.exe\""	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\System32\idndl\56085415360792	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File opened for modification	C:\Windows\System32\C_932\RCX1AC3.tmp	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File opened for modification	C:\Windows\System32\C_932\csrss.exe	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File opened for modification	C:\Windows\System32\idndl\RCX210D.tmp	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File opened for modification	C:\Windows\System32\idndl\wininit.exe	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File created	C:\Windows\System32\C_932\csrss.exe	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File created	C:\Windows\System32\C_932\886983d96e3d3e	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File created	C:\Windows\System32\idndl\wininit.exe	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Internet Explorer\taskhost.exe	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File created	C:\Program Files\Internet Explorer\b75386f1303e64	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File opened for modification	C:\Program Files\Internet Explorer\RCX2320.tmp	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
File opened for modification	C:\Program Files\Internet Explorer\taskhost.exe	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.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 6 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2912	schtasks.exe
532	schtasks.exe
2620	schtasks.exe
2596	schtasks.exe
3048	schtasks.exe
2580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2656	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
2656	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
2656	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2656	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
Token: SeDebugPrivilege	2464	wininit.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 2464	2656	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe	38
PID 2656 wrote to memory of 2464	2656	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe	38
PID 2656 wrote to memory of 2464	2656	c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe	38

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\c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.exe
"C:\Users\Admin\AppData\Local\Temp\c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627N.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:2656
- C:\Windows\System32\idndl\wininit.exe
  "C:\Windows\System32\idndl\wininit.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2464

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\PerfLogs\Admin\explorer.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\C_932\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\PerfLogs\Admin\audiodg.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\sppsvc.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\idndl\wininit.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3048

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\taskhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2580

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\idndl\wininit.exe

Filesize
973KB

MD5
0f03b3a0ca9a75f7b900a4e773020ec0

SHA1
1a952a87fb4e476eb9e111cee8d355e57426aadd

SHA256
c98996c31b4e223beb8d807100536c6c8dc19ec50a10365d893fa00b270f4627

SHA512
f243a27db37556c220032d2f6612193c4577f998e17a35ea9260cd942ff9211d5e12ffa4de8794081b3edd5e789206c147f2d2b9a16ddd82e2fd7b4b8247c6e7

Download Submit
memory/2464-72-0x0000000001150000-0x000000000124A000-memory.dmp

Filesize
1000KB

Download
memory/2656-0-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/2656-1-0x0000000000C80000-0x0000000000D7A000-memory.dmp

Filesize
1000KB

Download
memory/2656-2-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2656-4-0x0000000000370000-0x0000000000380000-memory.dmp

Filesize
64KB

Download
memory/2656-3-0x0000000000350000-0x0000000000358000-memory.dmp

Filesize
32KB

Download
memory/2656-5-0x0000000000380000-0x000000000038C000-memory.dmp

Filesize
48KB

Download
memory/2656-6-0x0000000000390000-0x000000000039C000-memory.dmp

Filesize
48KB

Download
memory/2656-7-0x00000000003A0000-0x00000000003A8000-memory.dmp

Filesize
32KB

Download
memory/2656-64-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/2656-73-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads