dcrat | a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3c

Analysis

max time kernel
55s
max time network
43s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-01-2025 04:07

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General

Target

a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Size

783KB
MD5

fe3d6c88424163b80a62962709b16250
SHA1

e0c49ed67f31bfbae1269c112026a548fa4c023c
SHA256

a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3c
SHA512

d2225dc3bb4574bd891a9aef820d43e24d4b5c3c368855bc0edc834ce6b45473cbdcc70ac92189cbcc1bbaa680637a47182db14cb235ae2cbfbf7919ab5f0a13
SSDEEP

12288:mqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:m+OQbpbgsFdAyQvzSqaq8q

Score

10^/10

dcrat defense_evasion infostealer persistence rat trojan

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 5 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	2632	2584	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2624	2584	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2736	2584	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2776	2584	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2520	2584	schtasks.exe	28

UAC bypass 3 TTPs 6 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	services.exe

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2384-1-0x00000000002A0000-0x000000000036A000-memory.dmp	dcrat
behavioral1/files/0x0005000000018761-32.dat	dcrat
behavioral1/memory/296-80-0x0000000000C70000-0x0000000000D3A000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
296	services.exe

Adds Run key to start application 2 TTPs 5 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\services = "\"C:\\Windows\\System32\\inseng\\services.exe\""	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Recovery\\1b8b1de2-69f6-11ef-9774-62cb582c238c\\explorer.exe\""	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\Downloaded Program Files\\lsass.exe\""	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Users\\Public\\Recorded TV\\Sample Media\\sppsvc.exe\""	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Windows\\System32\\drvinst\\sppsvc.exe\""	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	services.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drvinst\sppsvc.exe	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File created	C:\Windows\System32\inseng\services.exe	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File opened for modification	C:\Windows\System32\inseng\services.exe	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File created	C:\Windows\System32\inseng\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File created	C:\Windows\System32\drvinst\sppsvc.exe	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File created	C:\Windows\System32\drvinst\0a1fd5f707cd16ea89afd3d6db52b2da58214a6c	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File opened for modification	C:\Windows\System32\inseng\RCX8ED8.tmp	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File opened for modification	C:\Windows\System32\drvinst\RCX97B2.tmp	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\Downloaded Program Files\lsass.exe	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File created	C:\Windows\Downloaded Program Files\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File opened for modification	C:\Windows\Downloaded Program Files\RCX934D.tmp	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
File opened for modification	C:\Windows\Downloaded Program Files\lsass.exe	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.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 5 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2632	schtasks.exe
2624	schtasks.exe
2736	schtasks.exe
2776	schtasks.exe
2520	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe
296	services.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Token: SeDebugPrivilege	296	services.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 1036	2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe	34
PID 2384 wrote to memory of 1036	2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe	34
PID 2384 wrote to memory of 1036	2384	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe	34
PID 1036 wrote to memory of 2316	1036	cmd.exe	36
PID 1036 wrote to memory of 2316	1036	cmd.exe	36
PID 1036 wrote to memory of 2316	1036	cmd.exe	36
PID 1036 wrote to memory of 296	1036	cmd.exe	37
PID 1036 wrote to memory of 296	1036	cmd.exe	37
PID 1036 wrote to memory of 296	1036	cmd.exe	37

System policy modification 1 TTPs 6 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	services.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.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\a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe
"C:\Users\Admin\AppData\Local\Temp\a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3cN.exe"
1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2384
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\oCVVfwXdi6.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1036
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2316
- - C:\Windows\System32\inseng\services.exe
    "C:\Windows\System32\inseng\services.exe"
    3⤵
    - UAC bypass
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - System policy modification
    PID:296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\inseng\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\1b8b1de2-69f6-11ef-9774-62cb582c238c\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2736

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\Downloaded Program Files\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2624

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\Public\Recorded TV\Sample Media\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2776

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\drvinst\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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:\Users\Admin\AppData\Local\Temp\oCVVfwXdi6.bat

Filesize
203B

MD5
68b5762daa4c58ac7b52071c0e038123

SHA1
61e7150755197e181947e18ca7fa761bb01cfd1c

SHA256
35c394941bfb8ba0730b7c004f585407e3f34ea5bc61c2f5042901f65715923b

SHA512
00ede586075d400ecb63c082e72148abed6119411c131d9bd944c97197ea6e002dc8ad2face58fb9b704d436a52778e7de2990759e01af8344e3008742920af5

Download Submit
C:\Windows\System32\drvinst\sppsvc.exe

Filesize
783KB

MD5
fe3d6c88424163b80a62962709b16250

SHA1
e0c49ed67f31bfbae1269c112026a548fa4c023c

SHA256
a08c1dbff924e8ae6d84449d5e354fa1d0bb729a4a265515bce03f09edb68e3c

SHA512
d2225dc3bb4574bd891a9aef820d43e24d4b5c3c368855bc0edc834ce6b45473cbdcc70ac92189cbcc1bbaa680637a47182db14cb235ae2cbfbf7919ab5f0a13

Download Submit
memory/296-80-0x0000000000C70000-0x0000000000D3A000-memory.dmp

Filesize
808KB

Download
memory/2384-21-0x0000000002230000-0x000000000223C000-memory.dmp

Filesize
48KB

Download
memory/2384-19-0x0000000002210000-0x0000000002218000-memory.dmp

Filesize
32KB

Download
memory/2384-4-0x0000000000540000-0x0000000000548000-memory.dmp

Filesize
32KB

Download
memory/2384-6-0x00000000005E0000-0x00000000005E8000-memory.dmp

Filesize
32KB

Download
memory/2384-8-0x0000000002110000-0x000000000211A000-memory.dmp

Filesize
40KB

Download
memory/2384-7-0x00000000020D0000-0x00000000020DC000-memory.dmp

Filesize
48KB

Download
memory/2384-9-0x00000000020C0000-0x00000000020CA000-memory.dmp

Filesize
40KB

Download
memory/2384-10-0x00000000020F0000-0x00000000020F8000-memory.dmp

Filesize
32KB

Download
memory/2384-12-0x0000000000600000-0x0000000000608000-memory.dmp

Filesize
32KB

Download
memory/2384-11-0x0000000002130000-0x0000000002138000-memory.dmp

Filesize
32KB

Download
memory/2384-13-0x00000000020E0000-0x00000000020E8000-memory.dmp

Filesize
32KB

Download
memory/2384-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/2384-20-0x0000000002220000-0x0000000002228000-memory.dmp

Filesize
32KB

Download
memory/2384-5-0x00000000005D0000-0x00000000005E0000-memory.dmp

Filesize
64KB

Download
memory/2384-18-0x0000000002180000-0x0000000002188000-memory.dmp

Filesize
32KB

Download
memory/2384-17-0x0000000002150000-0x0000000002158000-memory.dmp

Filesize
32KB

Download
memory/2384-16-0x0000000002140000-0x0000000002148000-memory.dmp

Filesize
32KB

Download
memory/2384-14-0x0000000002100000-0x0000000002108000-memory.dmp

Filesize
32KB

Download
memory/2384-15-0x0000000002120000-0x0000000002128000-memory.dmp

Filesize
32KB

Download
memory/2384-22-0x00000000005F0000-0x00000000005F8000-memory.dmp

Filesize
32KB

Download
memory/2384-25-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2384-3-0x0000000000530000-0x0000000000538000-memory.dmp

Filesize
32KB

Download
memory/2384-55-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2384-63-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2384-2-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2384-77-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2384-1-0x00000000002A0000-0x000000000036A000-memory.dmp

Filesize
808KB

Download