dcrat | a07df24fcb9105b0be3b921cd48eae9202bd7f929f5dd57efd8a37c238cd411c

Analysis

max time kernel
95s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 14:46

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General

Target

fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
Size

828KB
MD5

b553593ddafa968aa68b16a806f2598b
SHA1

8de10ee8f4d29475d5ceb4f4974e7dc08bae31c3
SHA256

fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90
SHA512

da10426fd8471d8fabe63cdc41121d37accf821bd39bc26d822b96766a677ca8173e7cb697542c8f3d73bd20ea112ba0853cd865c6cd7ae6aa6f33bde39a9ffb
SSDEEP

12288:CuZLhFZJ3Rz1L7YDvlUFfPrs+LluzBEZMSneuW1Se13+ymHy:CuFTZHz1L7YhofPA+LJZMOHW3O/S

Score

10^/10

dcrat infostealer rat

Malware Config

Signatures

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

Process spawned unexpected child process 27 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	3600	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4676	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1916	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4988	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2848	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2432	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4380	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4264	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3844	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4884	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1844	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3604	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3892	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3280	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4924	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2256	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4692	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3880	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4024	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2924	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4720	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2332	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	688	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1300	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2760	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5100	2072	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2900	2072	schtasks.exe	87

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/3444-0-0x0000000000A20000-0x0000000000AF6000-memory.dmp	dcrat
behavioral2/files/0x0007000000023412-11.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe

Executes dropped EXE 1 IoCs

pid	Process
3404	unsecapp.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\ServiceState\WinHttpAutoProxySvc\Data\fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Windows\IdentityCRL\INT\backgroundTaskHost.exe	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Windows\IdentityCRL\INT\eddb19405b7ce1	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Windows\ShellComponents\winlogon.exe	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Windows\ShellComponents\cc11b995f2a76d	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 27 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2332	schtasks.exe
3280	schtasks.exe
4024	schtasks.exe
2924	schtasks.exe
5100	schtasks.exe
4884	schtasks.exe
3892	schtasks.exe
2760	schtasks.exe
1844	schtasks.exe
4720	schtasks.exe
688	schtasks.exe
2900	schtasks.exe
4676	schtasks.exe
4380	schtasks.exe
3844	schtasks.exe
2256	schtasks.exe
4692	schtasks.exe
4988	schtasks.exe
2848	schtasks.exe
3604	schtasks.exe
1916	schtasks.exe
3880	schtasks.exe
3600	schtasks.exe
2432	schtasks.exe
1300	schtasks.exe
4264	schtasks.exe
4924	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
3404	unsecapp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
Token: SeDebugPrivilege	3404	unsecapp.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3444 wrote to memory of 3404	3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe	115
PID 3444 wrote to memory of 3404	3444	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe	115

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\fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
"C:\Users\Admin\AppData\Local\Temp\fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3444
- C:\Windows\Temp\Crashpad\reports\unsecapp.exe
  "C:\Windows\Temp\Crashpad\reports\unsecapp.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\Saved Games\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Admin\Saved Games\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\Saved Games\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Saved Games\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Default\Saved Games\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Users\Default\Saved Games\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2432

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4380

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
- Creates scheduled task(s)
PID:4264

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3892

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 8 /tr "'C:\Windows\Temp\Crashpad\reports\unsecapp.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\Temp\Crashpad\reports\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3280

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 13 /tr "'C:\Windows\Temp\Crashpad\reports\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\Desktop\sihost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2256

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Users\All Users\Desktop\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Desktop\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4692

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 12 /tr "'C:\Windows\IdentityCRL\INT\backgroundTaskHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\IdentityCRL\INT\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 7 /tr "'C:\Windows\IdentityCRL\INT\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 13 /tr "'C:\Windows\ShellComponents\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1300

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\ShellComponents\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2332

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 5 /tr "'C:\Windows\ShellComponents\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:5100

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\backgroundTaskHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2900

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\Temp\Crashpad\reports\unsecapp.exe

Filesize
828KB

MD5
b553593ddafa968aa68b16a806f2598b

SHA1
8de10ee8f4d29475d5ceb4f4974e7dc08bae31c3

SHA256
fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90

SHA512
da10426fd8471d8fabe63cdc41121d37accf821bd39bc26d822b96766a677ca8173e7cb697542c8f3d73bd20ea112ba0853cd865c6cd7ae6aa6f33bde39a9ffb

Download Submit
memory/3404-32-0x00007FFE59CB0000-0x00007FFE5A771000-memory.dmp

Filesize
10.8MB

Download
memory/3404-34-0x00000000030E0000-0x00000000030F0000-memory.dmp

Filesize
64KB

Download
memory/3404-36-0x00007FFE59CB0000-0x00007FFE5A771000-memory.dmp

Filesize
10.8MB

Download
memory/3444-0-0x0000000000A20000-0x0000000000AF6000-memory.dmp

Filesize
856KB

Download
memory/3444-3-0x00007FFE59CB0000-0x00007FFE5A771000-memory.dmp

Filesize
10.8MB

Download
memory/3444-4-0x000000001B6A0000-0x000000001B6B0000-memory.dmp

Filesize
64KB

Download
memory/3444-33-0x00007FFE59CB0000-0x00007FFE5A771000-memory.dmp

Filesize
10.8MB

Download