dcrat | d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec

General

Target

d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Size

973KB
MD5

253a89ab5e44cbb0b5dd82d939bdaef5
SHA1

8be0ac5f520d74dbbce9687095609fc64f3ffd53
SHA256

d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec
SHA512

95f32123151550ccfb1fa9ee3a9e9b59508afcf96632e8ac2835fc04514406d51d78e8d33d3246c7db46f054e338f59617bbbafa7e6a0a384f35a1bf95c04eb8
SSDEEP

12288:nhhBMuext92N3cit1RGJV/H0uQ1PjmzBd5EBy10cgZMc29ZxasnLlDDE:n5E92NRzO/UFdmBchH29Zsg9E

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 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	3520	4996	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1632	4996	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4684	4996	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2160	4996	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4828	4996	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	468	4996	schtasks.exe	83

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Executes dropped EXE 1 IoCs

pid	Process
232	lsass.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\spoolsv = "\"C:\\Recovery\\WindowsRE\\spoolsv.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Windows\\L2Schemas\\sysmon.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Windows\\System32\\KBDYCL\\fontdrvhost.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\Windows\\System32\\MCCSEngineShared\\taskhostw.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\X_80.contrast-white\\lsass.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec = "\"C:\\Users\\All Users\\Microsoft\\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\System32\KBDYCL\fontdrvhost.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\KBDYCL\5b884080fd4f94	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\MCCSEngineShared\ea9f0e6c9e2dcd	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\KBDYCL\RCX8658.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\KBDYCL\fontdrvhost.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\MCCSEngineShared\taskhostw.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\X_80.contrast-white\RCX8A62.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\MCCSEngineShared\taskhostw.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\X_80.contrast-white\lsass.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\X_80.contrast-white\6203df4a6bafc7	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\MCCSEngineShared\RCX885D.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\X_80.contrast-white\lsass.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\L2Schemas\sysmon.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\L2Schemas\sysmon.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\L2Schemas\121e5b5079f7c0	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\L2Schemas\RCX83E6.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.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
3520	schtasks.exe
1632	schtasks.exe
4684	schtasks.exe
2160	schtasks.exe
4828	schtasks.exe
468	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Token: SeDebugPrivilege	232	lsass.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3148 wrote to memory of 232	3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe	91
PID 3148 wrote to memory of 232	3148	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe	91

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\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
"C:\Users\Admin\AppData\Local\Temp\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3148
- C:\Windows\System32\X_80.contrast-white\lsass.exe
  "C:\Windows\System32\X_80.contrast-white\lsass.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:232

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\L2Schemas\sysmon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\KBDYCL\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\MCCSEngineShared\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\X_80.contrast-white\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2160

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec" /sc ONLOGON /tr "'C:\Users\All Users\Microsoft\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4828

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:468

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Microsoft\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Filesize
973KB

MD5
253a89ab5e44cbb0b5dd82d939bdaef5

SHA1
8be0ac5f520d74dbbce9687095609fc64f3ffd53

SHA256
d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec

SHA512
95f32123151550ccfb1fa9ee3a9e9b59508afcf96632e8ac2835fc04514406d51d78e8d33d3246c7db46f054e338f59617bbbafa7e6a0a384f35a1bf95c04eb8

Download Submit
C:\Windows\System32\X_80.contrast-white\lsass.exe

Filesize
973KB

MD5
32bcf33f39f65c64ebd3236a2dce5889

SHA1
dd400aeac5390f74cde0c18afe9d06143a5f7cf8

SHA256
360540ed2dfe6819e3368ba07ebf6fe44fcb9cd498de7978b28f0dd605542226

SHA512
dc69cfa4453110d4f6a9f289928b218a172f0bf31d5e22a32eb65e936e3212f7a416a503e87fb5b5a8f5e47d299c0b972b4cd51ad69d66ce4cbac6974cdc77c9

Download Submit
memory/232-74-0x0000000000F40000-0x000000000103A000-memory.dmp

Filesize
1000KB

Download
memory/3148-0-0x00007FFA102C3000-0x00007FFA102C5000-memory.dmp

Filesize
8KB

Download
memory/3148-1-0x0000000000AD0000-0x0000000000BCA000-memory.dmp

Filesize
1000KB

Download
memory/3148-2-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/3148-4-0x0000000002D50000-0x0000000002D60000-memory.dmp

Filesize
64KB

Download
memory/3148-3-0x0000000002D40000-0x0000000002D48000-memory.dmp

Filesize
32KB

Download
memory/3148-5-0x0000000002D70000-0x0000000002D7C000-memory.dmp

Filesize
48KB

Download
memory/3148-6-0x0000000002D80000-0x0000000002D8C000-memory.dmp

Filesize
48KB

Download
memory/3148-7-0x0000000002D90000-0x0000000002D98000-memory.dmp

Filesize
32KB

Download
memory/3148-75-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads