dcrat | 7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd

General

Target

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Size

1017KB
MD5

d3c5eed3ff2e208576288da3caf4feb7
SHA1

5405262345f60c37eec11c8731f163069137864f
SHA256

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd
SHA512

b67c12670cd42b816d2be8d6524c8b6122e8b239ff2f006c799f94daa4c9f4eafb24f91bd7208db3c94db926afcc7fbfd05f87f03201f567132984923e38e899
SSDEEP

12288:FWS8z4eYDr/0fAhZRFABcwTiEJad8KZyc2nS1hYLcS4nQsMPd7XSeD6vGaI1qn4M:FWSK6H0fMGcwzJsZZyLwvn2V7nDki+4M

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.

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2884	560	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	436	560	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	420	560	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3744	560	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4700	560	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3088	560	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4476	560	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral2/memory/4936-1-0x0000000000F40000-0x0000000001046000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cba-11.dat	dcrat

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

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

Executes dropped EXE 1 IoCs

Processes:

spoolsv.exe

pid	Process
2156	spoolsv.exe

Adds Run key to start application 2 TTPs 7 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\TextInputHost = "\"C:\\Windows\\SystemApps\\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\\InputApp\\TextInput\\TextInputHost.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\PerfLogs\\SearchApp.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\Recovery\\WindowsRE\\System.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\WiaExtensionHost64\\dllhost.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\smss = "\"C:\\Documents and Settings\\smss.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Recovery\\WindowsRE\\fontdrvhost.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Users\\All Users\\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\\updates\\308046B0AF4A39CB\\spoolsv.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

Drops file in System32 directory 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	ioc	Process
File created	C:\Windows\System32\WiaExtensionHost64\5940a34987c99120d96dace90a3f93f329dcad63	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
File created	C:\Windows\System32\WiaExtensionHost64\dllhost.exe	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

Drops file in Windows directory 3 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	ioc	Process
File created	C:\Windows\schemas\EAPHost\csrss.exe	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
File created	C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInput\TextInputHost.exe	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
File created	C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInput\22eafd247d37c30fed3795ee41d259ec72bb351c	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.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

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	Process
4476	schtasks.exe
2884	schtasks.exe
436	schtasks.exe
420	schtasks.exe
3744	schtasks.exe
4700	schtasks.exe
3088	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exespoolsv.exe

pid	Process
4936	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
2156	spoolsv.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exespoolsv.exe

description	pid	Process
Token: SeDebugPrivilege	4936	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Token: SeDebugPrivilege	2156	spoolsv.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	pid	Process	procid_target
PID 4936 wrote to memory of 2156	4936	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe	91
PID 4936 wrote to memory of 2156	4936	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.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\7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
"C:\Users\Admin\AppData\Local\Temp\7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.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:4936
- C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\spoolsv.exe
  "C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\spoolsv.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2156

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\All Users\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInput\TextInputHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:436

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\PerfLogs\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:420

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\WiaExtensionHost64\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Documents and Settings\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3088

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4476

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

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Downloads

C:\Windows\System32\WiaExtensionHost64\dllhost.exe

Filesize
1017KB

MD5
d3c5eed3ff2e208576288da3caf4feb7

SHA1
5405262345f60c37eec11c8731f163069137864f

SHA256
7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd

SHA512
b67c12670cd42b816d2be8d6524c8b6122e8b239ff2f006c799f94daa4c9f4eafb24f91bd7208db3c94db926afcc7fbfd05f87f03201f567132984923e38e899

Download Submit
memory/2156-29-0x0000000001490000-0x000000000149E000-memory.dmp

Filesize
56KB

Download
memory/2156-30-0x00000000014A0000-0x00000000014AC000-memory.dmp

Filesize
48KB

Download
memory/2156-32-0x000000001B920000-0x000000001BA22000-memory.dmp

Filesize
1.0MB

Download
memory/4936-1-0x0000000000F40000-0x0000000001046000-memory.dmp

Filesize
1.0MB

Download
memory/4936-0-0x00007FFACA290000-0x00007FFACA485000-memory.dmp

Filesize
2.0MB

Download
memory/4936-2-0x00007FFACA290000-0x00007FFACA485000-memory.dmp

Filesize
2.0MB

Download
memory/4936-28-0x00007FFACA290000-0x00007FFACA485000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads