dcrat | dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519

General

Target

dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
Size

1.3MB
MD5

07ad210b70374acab17e6afb9b25a125
SHA1

9c7a17901aa8607ae955b73ba16d7ea82115b76d
SHA256

dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519
SHA512

fd60061a17f6f54a0d628799f3f5bc83af8cd1ade54f99d292903b5f47956120c38f046a7e3f2e6aec3c90202c84a35503e440d728fb61490fb888ec7c535582
SSDEEP

24576:9b58JXB2QrpIxsA6m9Fsd1Mqvr1z0ShHqgJ8iy2IE/m:9bK1B24pIeAjjA+HiyLK

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 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	1476	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1712	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2196	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2468	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2820	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2936	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2868	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2988	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2272	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2752	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2740	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2880	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2716	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2748	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2792	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2392	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2696	2220	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2032	2220	schtasks.exe	28

DCRat payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2796-54-0x0000000000C50000-0x0000000000D9C000-memory.dmp	dcrat
behavioral1/files/0x0006000000018b86-69.dat	dcrat
behavioral1/files/0x0006000000018bd4-79.dat	dcrat
behavioral1/files/0x0006000000018bd4-80.dat	dcrat
behavioral1/memory/1000-81-0x0000000000040000-0x000000000018C000-memory.dmp	dcrat
behavioral1/memory/1000-85-0x000000001AF40000-0x000000001AFC0000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1000	winlogon.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Photo Viewer\es-ES\winlogon.exe	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
File created	C:\Program Files\Windows Photo Viewer\es-ES\cc11b995f2a76d	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\spoolsv.exe	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
File created	C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\f3b6ecef712a24	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\de-DE\lsass.exe	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
File opened for modification	C:\Windows\de-DE\lsass.exe	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
File created	C:\Windows\de-DE\6203df4a6bafc7	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.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 18 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2468	schtasks.exe
2032	schtasks.exe
1712	schtasks.exe
2196	schtasks.exe
2868	schtasks.exe
2740	schtasks.exe
2748	schtasks.exe
2792	schtasks.exe
2696	schtasks.exe
2880	schtasks.exe
2716	schtasks.exe
1476	schtasks.exe
2820	schtasks.exe
2936	schtasks.exe
2988	schtasks.exe
2272	schtasks.exe
2752	schtasks.exe
2392	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2796	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
1000	winlogon.exe
1000	winlogon.exe
1000	winlogon.exe
1000	winlogon.exe
1000	winlogon.exe
1000	winlogon.exe
1000	winlogon.exe
1000	winlogon.exe
1000	winlogon.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1000	winlogon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
Token: SeDebugPrivilege	1000	winlogon.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 3052	2796	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe	47
PID 2796 wrote to memory of 3052	2796	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe	47
PID 2796 wrote to memory of 3052	2796	dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe	47
PID 3052 wrote to memory of 1880	3052	cmd.exe	49
PID 3052 wrote to memory of 1880	3052	cmd.exe	49
PID 3052 wrote to memory of 1880	3052	cmd.exe	49
PID 3052 wrote to memory of 1000	3052	cmd.exe	50
PID 3052 wrote to memory of 1000	3052	cmd.exe	50
PID 3052 wrote to memory of 1000	3052	cmd.exe	50

C:\Users\Admin\AppData\Local\Temp\dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe
"C:\Users\Admin\AppData\Local\Temp\dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519_JC.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\lbKBZUlOPJ.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1880
- - C:\Recovery\909558a2-20ee-11ee-b7b1-d66763f08456\winlogon.exe
    "C:\Recovery\909558a2-20ee-11ee-b7b1-d66763f08456\winlogon.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:1000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Windows\de-DE\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\de-DE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1712

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Windows\de-DE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2196

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2468

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\es-ES\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2820

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Photo Viewer\es-ES\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2936

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\audiodg.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodg" /sc ONLOGON /tr "'C:\MSOCache\All Users\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "audiodga" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\audiodg.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2272

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 6 /tr "'C:\Users\Public\Videos\Sample Videos\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Users\Public\Videos\Sample Videos\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2748

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Users\Public\Videos\Sample Videos\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 7 /tr "'C:\Recovery\909558a2-20ee-11ee-b7b1-d66763f08456\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2392

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Recovery\909558a2-20ee-11ee-b7b1-d66763f08456\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 5 /tr "'C:\Recovery\909558a2-20ee-11ee-b7b1-d66763f08456\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2032

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Recovery\909558a2-20ee-11ee-b7b1-d66763f08456\winlogon.exe

Filesize
1.3MB

MD5
07ad210b70374acab17e6afb9b25a125

SHA1
9c7a17901aa8607ae955b73ba16d7ea82115b76d

SHA256
dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519

SHA512
fd60061a17f6f54a0d628799f3f5bc83af8cd1ade54f99d292903b5f47956120c38f046a7e3f2e6aec3c90202c84a35503e440d728fb61490fb888ec7c535582

Download Submit
C:\Recovery\909558a2-20ee-11ee-b7b1-d66763f08456\winlogon.exe

Filesize
1.3MB

MD5
07ad210b70374acab17e6afb9b25a125

SHA1
9c7a17901aa8607ae955b73ba16d7ea82115b76d

SHA256
dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519

SHA512
fd60061a17f6f54a0d628799f3f5bc83af8cd1ade54f99d292903b5f47956120c38f046a7e3f2e6aec3c90202c84a35503e440d728fb61490fb888ec7c535582

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

Filesize
226B

MD5
e1820f367e38051ada72996bd0450053

SHA1
37209d6863ac3aaa72498b375fa1a8001305c43f

SHA256
b0d214bbc6b41dcea2bfa183b92a524dad8986812ee82b242cc4be6b8bcb4b69

SHA512
7c4800fa86f86b80a4ba1f4cec13f6be2b836a0e7d8bcc62b7d2d0a98bf6b2f4f231a1af461f925238472541c4563a7f8991c166796a44f7ac5a6ef3362d4246

Download Submit
C:\Users\Public\Videos\Sample Videos\System.exe

Filesize
1.3MB

MD5
07ad210b70374acab17e6afb9b25a125

SHA1
9c7a17901aa8607ae955b73ba16d7ea82115b76d

SHA256
dde37291022dad1f8a4b27584006e7ab2937e2e9398df727181e78c4f3e1d519

SHA512
fd60061a17f6f54a0d628799f3f5bc83af8cd1ade54f99d292903b5f47956120c38f046a7e3f2e6aec3c90202c84a35503e440d728fb61490fb888ec7c535582

Download Submit
memory/1000-81-0x0000000000040000-0x000000000018C000-memory.dmp

Filesize
1.3MB

Download
memory/1000-82-0x000007FEF4B20000-0x000007FEF550C000-memory.dmp

Filesize
9.9MB

Download
memory/1000-83-0x000000001AF40000-0x000000001AFC0000-memory.dmp

Filesize
512KB

Download
memory/1000-84-0x000007FEF4B20000-0x000007FEF550C000-memory.dmp

Filesize
9.9MB

Download
memory/1000-85-0x000000001AF40000-0x000000001AFC0000-memory.dmp

Filesize
512KB

Download
memory/2796-59-0x0000000000280000-0x0000000000290000-memory.dmp

Filesize
64KB

Download
memory/2796-60-0x0000000000290000-0x000000000029E000-memory.dmp

Filesize
56KB

Download
memory/2796-58-0x0000000000260000-0x0000000000276000-memory.dmp

Filesize
88KB

Download
memory/2796-57-0x0000000000140000-0x000000000015C000-memory.dmp

Filesize
112KB

Download
memory/2796-78-0x000007FEF5510000-0x000007FEF5EFC000-memory.dmp

Filesize
9.9MB

Download
memory/2796-56-0x000000001AC30000-0x000000001ACB0000-memory.dmp

Filesize
512KB

Download
memory/2796-55-0x000007FEF5510000-0x000007FEF5EFC000-memory.dmp

Filesize
9.9MB

Download
memory/2796-54-0x0000000000C50000-0x0000000000D9C000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads