dcrat | a07df24fcb9105b0be3b921cd48eae9202bd7f929f5dd57efd8a37c238cd411c

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 12 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	2476	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2420	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2464	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1720	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3064	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2404	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	268	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2720	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2700	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2776	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2460	2444	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1672	2444	schtasks.exe	30

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2644-0-0x00000000000A0000-0x0000000000176000-memory.dmp	dcrat
behavioral1/files/0x00070000000144b0-11.dat	dcrat
behavioral1/memory/1904-17-0x0000000000AF0000-0x0000000000BC6000-memory.dmp	dcrat
behavioral1/memory/1904-20-0x000000001AD20000-0x000000001ADA0000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1904	taskhost.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	C:\Program Files\DVD Maker\Shared\886983d96e3d3e	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Program Files\Uninstall Information\dllhost.exe	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Program Files\Uninstall Information\5940a34987c991	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\en-US\lsm.exe	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\en-US\101b941d020240	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File created	C:\Program Files\DVD Maker\Shared\csrss.exe	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\csrss.exe	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 12 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2460	schtasks.exe
2464	schtasks.exe
1720	schtasks.exe
2404	schtasks.exe
2776	schtasks.exe
2720	schtasks.exe
2700	schtasks.exe
1672	schtasks.exe
2476	schtasks.exe
2420	schtasks.exe
3064	schtasks.exe
268	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2644	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
1904	taskhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2644	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe
Token: SeDebugPrivilege	1904	taskhost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2644 wrote to memory of 1904	2644	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe	43
PID 2644 wrote to memory of 1904	2644	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe	43
PID 2644 wrote to memory of 1904	2644	fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90.exe	43

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⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2644
- C:\Users\Default User\taskhost.exe
  "C:\Users\Default User\taskhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1904

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Program Files\DVD Maker\Shared\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\DVD Maker\Shared\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2420

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Program Files\DVD Maker\Shared\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2464

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Program Files\Uninstall Information\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Program Files\Uninstall Information\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 13 /tr "'C:\Users\Default User\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:268

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Users\Default User\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2720

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2776

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Default\taskhost.exe

Filesize
828KB

MD5
b553593ddafa968aa68b16a806f2598b

SHA1
8de10ee8f4d29475d5ceb4f4974e7dc08bae31c3

SHA256
fed72a470e5c75ecdf5eabb18de614f7caeaa4a4f629989c0477fdf28d7a2f90

SHA512
da10426fd8471d8fabe63cdc41121d37accf821bd39bc26d822b96766a677ca8173e7cb697542c8f3d73bd20ea112ba0853cd865c6cd7ae6aa6f33bde39a9ffb

Download Submit
memory/1904-17-0x0000000000AF0000-0x0000000000BC6000-memory.dmp

Filesize
856KB

Download
memory/1904-19-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download
memory/1904-20-0x000000001AD20000-0x000000001ADA0000-memory.dmp

Filesize
512KB

Download
memory/1904-21-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2644-0-0x00000000000A0000-0x0000000000176000-memory.dmp

Filesize
856KB

Download
memory/2644-1-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2644-2-0x000000001AC90000-0x000000001AD10000-memory.dmp

Filesize
512KB

Download
memory/2644-18-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads