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 7 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	2540	3812	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4552	3812	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1284	3812	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1872	3812	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3236	3812	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	976	3812	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4052	3812	schtasks.exe	82

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Executes dropped EXE 1 IoCs

pid	Process
5036	explorer.exe

Adds Run key to start application 2 TTPs 7 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\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec = "\"C:\\Program Files (x86)\\Windows Media Player\\en-US\\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Recovery\\WindowsRE\\explorer.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sihost = "\"C:\\Windows\\System32\\Windows.Management.Service\\sihost.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\WudfSMCClassExt\\RuntimeBroker.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec = "\"C:\\Documents and Settings\\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\Globalization\\Time Zone\\wininit.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Registry = "\"C:\\Users\\Default\\Pictures\\Registry.exe\""	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\WudfSMCClassExt\RCX9D11.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\WudfSMCClassExt\RuntimeBroker.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\Windows.Management.Service\sihost.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\Windows.Management.Service\66fc9ff0ee96c2	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\WudfSMCClassExt\RuntimeBroker.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\System32\WudfSMCClassExt\9e8d7a4ca61bd9	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\Windows.Management.Service\RCX9B0C.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\System32\Windows.Management.Service\sihost.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Media Player\en-US\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Program Files (x86)\Windows Media Player\en-US\14dcb484196c0b	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\en-US\RCX9703.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\en-US\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Globalization\Time Zone\RCX92FA.tmp	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\Globalization\Time Zone\wininit.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File opened for modification	C:\Windows\Globalization\Time Zone\wininit.exe	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
File created	C:\Windows\Globalization\Time Zone\56085415360792	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 7 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3236	schtasks.exe
976	schtasks.exe
4052	schtasks.exe
2540	schtasks.exe
4552	schtasks.exe
1284	schtasks.exe
1872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4856	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe
Token: SeDebugPrivilege	5036	explorer.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 5036	4856	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe	90
PID 4856 wrote to memory of 5036	4856	d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe	90

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 Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Recovery\WindowsRE\explorer.exe
  "C:\Recovery\WindowsRE\explorer.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:5036

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\Globalization\Time Zone\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2540

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Users\Default\Pictures\Registry.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\en-US\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1284

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1872

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\System32\Windows.Management.Service\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\WudfSMCClassExt\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec" /sc ONLOGON /tr "'C:\Documents and Settings\d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4052

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:\Windows\System32\Windows.Management.Service\sihost.exe

Filesize
973KB

MD5
253a89ab5e44cbb0b5dd82d939bdaef5

SHA1
8be0ac5f520d74dbbce9687095609fc64f3ffd53

SHA256
d6d1b2020ca0764371016591ce25235a49372651dd5d8d5278decbdc6b9163ec

SHA512
95f32123151550ccfb1fa9ee3a9e9b59508afcf96632e8ac2835fc04514406d51d78e8d33d3246c7db46f054e338f59617bbbafa7e6a0a384f35a1bf95c04eb8

Download Submit
C:\Windows\System32\WudfSMCClassExt\RuntimeBroker.exe

Filesize
973KB

MD5
a45818fdc1e55fb0e907514d75cd5c76

SHA1
325af26f692b6ec42661694bc4395380056c3d8f

SHA256
cb512e4c6af231bef79532a6cb90c5bb67032ff9adec06fd02598f08fd42d984

SHA512
d0aa0ce63f84b3af6a8506471160aece10c816e6fd2864e1573911aaeaf88c13a8be62870df5f05930ef46f8f7d1ba1f82f8063b563dc512f904fec46a0448a9

Download Submit
memory/4856-0-0x00007FF901873000-0x00007FF901875000-memory.dmp

Filesize
8KB

Download
memory/4856-1-0x0000000000D70000-0x0000000000E6A000-memory.dmp

Filesize
1000KB

Download
memory/4856-2-0x00007FF901870000-0x00007FF902331000-memory.dmp

Filesize
10.8MB

Download
memory/4856-4-0x0000000001680000-0x0000000001690000-memory.dmp

Filesize
64KB

Download
memory/4856-3-0x0000000001670000-0x0000000001678000-memory.dmp

Filesize
32KB

Download
memory/4856-5-0x0000000003090000-0x000000000309C000-memory.dmp

Filesize
48KB

Download
memory/4856-6-0x00000000030A0000-0x00000000030AC000-memory.dmp

Filesize
48KB

Download
memory/4856-7-0x00000000030B0000-0x00000000030B8000-memory.dmp

Filesize
32KB

Download
memory/4856-84-0x00007FF901870000-0x00007FF902331000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads