dcrat | 46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c

General

Target

46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
Size

2.3MB
MD5

02d4afb627db486201d4700854e390d9
SHA1

f63533f82c2a434f9104ccc9beee3216796aeb14
SHA256

46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c
SHA512

0ccaa408f5e1e3481b413ab07dea2b77540e500097a7ab194f6052161517b2c29214d680e7731b9a39a300edf3b88a3b564f85c8008386099474e82c028109fc
SSDEEP

49152:uAHOUI3tHsLi/P025up1V40tz/i4Eq/qo8ychEcMPbVxFAK6E00:uIQ3L/zULV/qWch7MPxxFh6E0

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
Dcrat family
dcrat

Process spawned unexpected child process 18 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	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2820	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2572	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1940	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2160	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	604	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	600	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2944	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2680	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2296	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2396	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2524	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2672	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1432	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2564	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2980	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2968	1540	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2636	1540	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2876-1-0x00000000009D0000-0x0000000000C1E000-memory.dmp	dcrat
behavioral1/files/0x0005000000019227-16.dat	dcrat
behavioral1/memory/1352-28-0x00000000000D0000-0x000000000031E000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1352	wininit.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Microsoft Office\Office14\wininit.exe	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
File created	C:\Program Files\Microsoft Office\Office14\56085415360792	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
File created	C:\Program Files\Windows Defender\ja-JP\OSPPSVC.exe	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
File created	C:\Program Files\Windows Defender\ja-JP\1610b97d3ab4a7	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.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 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2396	schtasks.exe
2564	schtasks.exe
2980	schtasks.exe
1940	schtasks.exe
2160	schtasks.exe
600	schtasks.exe
2944	schtasks.exe
2680	schtasks.exe
2820	schtasks.exe
2672	schtasks.exe
1432	schtasks.exe
2572	schtasks.exe
2968	schtasks.exe
2636	schtasks.exe
2632	schtasks.exe
604	schtasks.exe
2296	schtasks.exe
2524	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2876	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
2876	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
2876	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
1352	wininit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2876	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
Token: SeDebugPrivilege	1352	wininit.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2556	2876	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe	49
PID 2876 wrote to memory of 2556	2876	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe	49
PID 2876 wrote to memory of 2556	2876	46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe	49
PID 2556 wrote to memory of 3032	2556	cmd.exe	51
PID 2556 wrote to memory of 3032	2556	cmd.exe	51
PID 2556 wrote to memory of 3032	2556	cmd.exe	51
PID 2556 wrote to memory of 1352	2556	cmd.exe	52
PID 2556 wrote to memory of 1352	2556	cmd.exe	52
PID 2556 wrote to memory of 1352	2556	cmd.exe	52

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\46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe
"C:\Users\Admin\AppData\Local\Temp\46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\AbHAxMDrDz.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2556
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:3032
- - C:\Program Files\Microsoft Office\Office14\wininit.exe
    "C:\Program Files\Microsoft Office\Office14\wininit.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1352

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 7 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\explorer.exe'" /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\18fc4542-69f6-11ef-a46c-62cb582c238c\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2820

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 9 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2572

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\Templates\OSPPSVC.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Users\Admin\Templates\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2160

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 12 /tr "'C:\Users\Admin\Templates\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1432

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 12 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\Program Files\Microsoft Office\Office14\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2672

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Microsoft Office\Office14\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2524

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Program Files\Microsoft Office\Office14\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2396

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Defender\ja-JP\OSPPSVC.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\ja-JP\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Defender\ja-JP\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2564

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2980

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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:\Program Files\Windows Defender\ja-JP\OSPPSVC.exe

Filesize
2.3MB

MD5
02d4afb627db486201d4700854e390d9

SHA1
f63533f82c2a434f9104ccc9beee3216796aeb14

SHA256
46cf8f5e46c3dbdd32c5f300f6fd395a7f12c0ec611de9e518bf7312f187590c

SHA512
0ccaa408f5e1e3481b413ab07dea2b77540e500097a7ab194f6052161517b2c29214d680e7731b9a39a300edf3b88a3b564f85c8008386099474e82c028109fc

Download Submit
C:\Users\Admin\AppData\Local\Temp\AbHAxMDrDz.bat

Filesize
219B

MD5
55cd6056f3658fb07c0d111f3601131c

SHA1
2698020d093d918e389d8c2cf38b7545032b5ee6

SHA256
f66e7ee0b79ee4f598ac0e106ddc735fb33c4487bc278587d109f445e56ba7eb

SHA512
bece0776d82a75ef4b03fad7a9d7ba7763f51bfefd85dfc9df089a6ad1473b399bfe232dd2d3a91928c6d7f8a4ee8536bdd23a2a4c3704c36290393c916fecb8

Download Submit
memory/1352-28-0x00000000000D0000-0x000000000031E000-memory.dmp

Filesize
2.3MB

Download
memory/2876-0-0x000007FEF5FB3000-0x000007FEF5FB4000-memory.dmp

Filesize
4KB

Download
memory/2876-1-0x00000000009D0000-0x0000000000C1E000-memory.dmp

Filesize
2.3MB

Download
memory/2876-2-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2876-3-0x00000000002D0000-0x00000000002EC000-memory.dmp

Filesize
112KB

Download
memory/2876-4-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2876-5-0x0000000002290000-0x00000000022E6000-memory.dmp

Filesize
344KB

Download
memory/2876-6-0x0000000000420000-0x0000000000432000-memory.dmp

Filesize
72KB

Download
memory/2876-7-0x0000000000430000-0x000000000043E000-memory.dmp

Filesize
56KB

Download
memory/2876-25-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads