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 6 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

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

description	pid	pid_target	process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4520	1432	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3480	1432	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4680	1432	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1876	1432	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4556	1432	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1004	1432	schtasks.exe

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral2/memory/1352-1-0x00000000008E0000-0x00000000009E6000-memory.dmp	dcrat
C:\PerfLogs\dllhost.exe	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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

Executes dropped EXE 1 IoCs

Processes:

dllhost.exe

pid process

1124 dllhost.exe

pid	process
1124	dllhost.exe

Adds Run key to start application 2 TTPs 6 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\7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft_Windows_Desktop_Runtime_-_8.0.2_(x64)_20241007091358_003_windowsdesktop_runtime_8.0.2_win_x64.msi\\7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\StartMenuExperienceHost = "\"C:\\Users\\All Users\\Application Data\\StartMenuExperienceHost.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\upfc = "\"C:\\Program Files\\Crashpad\\reports\\upfc.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\SchCache\\dllhost.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\PerfLogs\\dllhost.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\Documents and Settings\\SearchApp.exe\""	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

Drops file in Program Files directory 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	ioc	process
File created	C:\Program Files\Crashpad\reports\upfc.exe	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
File created	C:\Program Files\Crashpad\reports\ea1d8f6d871115e19e634087152e4aa43b875a69	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

Drops file in Windows directory 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	ioc	process
File created	C:\Windows\SchCache\5940a34987c99120d96dace90a3f93f329dcad63	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
File created	C:\Windows\SchCache\dllhost.exe	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 6 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.exe

pid process

4520 schtasks.exe
3480 schtasks.exe
4680 schtasks.exe
1876 schtasks.exe
4556 schtasks.exe
1004 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exedllhost.exe

pid process

1352 7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
1124 dllhost.exe

pid	process
4520	schtasks.exe
3480	schtasks.exe
4680	schtasks.exe
1876	schtasks.exe
4556	schtasks.exe
1004	schtasks.exe

pid	process
1352	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
1124	dllhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exedllhost.exe

description	pid	process
Token: SeDebugPrivilege	1352	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe
Token: SeDebugPrivilege	1124	dllhost.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe

description	pid	process	target process
PID 1352 wrote to memory of 1124	1352	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe	dllhost.exe
PID 1352 wrote to memory of 1124	1352	7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe	dllhost.exe

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 Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1352
- C:\Windows\SchCache\dllhost.exe
  "C:\Windows\SchCache\dllhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1124

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\Microsoft_Windows_Desktop_Runtime_-_8.0.2_(x64)_20241007091358_003_windowsdesktop_runtime_8.0.2_win_x64.msi\7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Users\All Users\Application Data\StartMenuExperienceHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3480

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files\Crashpad\reports\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\SchCache\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\PerfLogs\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Documents and Settings\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1004

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

Loading Replay Monitor...

Downloads

C:\PerfLogs\dllhost.exe

Filesize
1017KB

MD5
d3c5eed3ff2e208576288da3caf4feb7

SHA1
5405262345f60c37eec11c8731f163069137864f

SHA256
7b62293bc123569809bdf209855dfdcfb1c155295e1284ebe500a737267547dd

SHA512
b67c12670cd42b816d2be8d6524c8b6122e8b239ff2f006c799f94daa4c9f4eafb24f91bd7208db3c94db926afcc7fbfd05f87f03201f567132984923e38e899

Download Submit
memory/1124-26-0x0000000002C50000-0x0000000002C5E000-memory.dmp

Filesize
56KB

Download
memory/1124-28-0x0000000002C70000-0x0000000002C7C000-memory.dmp

Filesize
48KB

Download
memory/1352-0-0x00007FF9184C3000-0x00007FF9184C5000-memory.dmp

Filesize
8KB

Download
memory/1352-1-0x00000000008E0000-0x00000000009E6000-memory.dmp

Filesize
1.0MB

Download
memory/1352-4-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/1352-27-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads