dcrat | c66b91cd0446d231445052af25b86edc15127b4313e40457f6697850da21810d

General

Target

1e9d648839d6df31421c48fc5a58fdb1.exe
Size

1.3MB
MD5

1e9d648839d6df31421c48fc5a58fdb1
SHA1

8824a936225692b169bf16491e85f71149a15a90
SHA256

c66b91cd0446d231445052af25b86edc15127b4313e40457f6697850da21810d
SHA512

02a41349d165462c777970bbc41c5b3b86ad2b5af68c62e7f6e248fb3e169d9ac065039630848d1631a0e10ef43b6870d69c85f20e24904c8e638b6cf8e0f7ea
SSDEEP

24576:kOHLrVJI42Vq2TjMqmMdTjtFSV3pwcaHigoqOIW1Khv:h1JCVm5UxFsGVl

Score

10^/10

dcrat infostealer rat spyware stealer

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 6 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4476	1664	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4788	1664	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	64	1664	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3936	1664	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	520	1664	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2356	1664	schtasks.exe

Executes dropped EXE 1 IoCs

Processes:

WmiPrvSE.exe

pid process

5064 WmiPrvSE.exe

pid	process
5064	WmiPrvSE.exe

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

Processes:

1e9d648839d6df31421c48fc5a58fdb1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	1e9d648839d6df31421c48fc5a58fdb1.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Drops file in Program Files directory 2 IoCs

Processes:

1e9d648839d6df31421c48fc5a58fdb1.exe

description	ioc	process
File created	C:\Program Files (x86)\Windows Photo Viewer\en-US\SearchApp.exe	1e9d648839d6df31421c48fc5a58fdb1.exe
File created	C:\Program Files (x86)\Windows Photo Viewer\en-US\38384e6a620884	1e9d648839d6df31421c48fc5a58fdb1.exe

Drops file in Windows directory 3 IoCs

Processes:

1e9d648839d6df31421c48fc5a58fdb1.exe

description	ioc	process
File created	C:\Windows\InputMethod\WmiPrvSE.exe	1e9d648839d6df31421c48fc5a58fdb1.exe
File opened for modification	C:\Windows\InputMethod\WmiPrvSE.exe	1e9d648839d6df31421c48fc5a58fdb1.exe
File created	C:\Windows\InputMethod\24dbde2999530e	1e9d648839d6df31421c48fc5a58fdb1.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 6 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

4788 schtasks.exe
64 schtasks.exe
3936 schtasks.exe
520 schtasks.exe
2356 schtasks.exe
4476 schtasks.exe

pid	process
4788	schtasks.exe
64	schtasks.exe
3936	schtasks.exe
520	schtasks.exe
2356	schtasks.exe
4476	schtasks.exe

Modifies registry class 1 IoCs

Processes:

1e9d648839d6df31421c48fc5a58fdb1.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings	1e9d648839d6df31421c48fc5a58fdb1.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

1e9d648839d6df31421c48fc5a58fdb1.exeWmiPrvSE.exe

pid	process
5036	1e9d648839d6df31421c48fc5a58fdb1.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe
5064	WmiPrvSE.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WmiPrvSE.exe

pid process

5064 WmiPrvSE.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

1e9d648839d6df31421c48fc5a58fdb1.exeWmiPrvSE.exe

description pid process

Token: SeDebugPrivilege 5036 1e9d648839d6df31421c48fc5a58fdb1.exe
Token: SeDebugPrivilege 5064 WmiPrvSE.exe

pid	process
5064	WmiPrvSE.exe

description	pid	process
Token: SeDebugPrivilege	5036	1e9d648839d6df31421c48fc5a58fdb1.exe
Token: SeDebugPrivilege	5064	WmiPrvSE.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

1e9d648839d6df31421c48fc5a58fdb1.execmd.exe

description	pid	process	target process
PID 5036 wrote to memory of 5108	5036	1e9d648839d6df31421c48fc5a58fdb1.exe	cmd.exe
PID 5036 wrote to memory of 5108	5036	1e9d648839d6df31421c48fc5a58fdb1.exe	cmd.exe
PID 5108 wrote to memory of 3764	5108	cmd.exe	w32tm.exe
PID 5108 wrote to memory of 3764	5108	cmd.exe	w32tm.exe
PID 5108 wrote to memory of 5064	5108	cmd.exe	WmiPrvSE.exe
PID 5108 wrote to memory of 5064	5108	cmd.exe	WmiPrvSE.exe

C:\Users\Admin\AppData\Local\Temp\1e9d648839d6df31421c48fc5a58fdb1.exe
"C:\Users\Admin\AppData\Local\Temp\1e9d648839d6df31421c48fc5a58fdb1.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5036

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\UaJRNF11a2.bat"
2⤵
- Suspicious use of WriteProcessMemory
PID:5108

C:\Windows\system32\w32tm.exe
w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
3⤵
PID:3764

C:\Windows\InputMethod\WmiPrvSE.exe
"C:\Windows\InputMethod\WmiPrvSE.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:5064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 12 /tr "'C:\Windows\InputMethod\WmiPrvSE.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\InputMethod\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4788

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 12 /tr "'C:\Windows\InputMethod\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:64

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\SearchApp.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3936

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Photo Viewer\en-US\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2356

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\UaJRNF11a2.bat

Filesize
200B

MD5
5dd1249b4a403ecb992e5258361f3367

SHA1
4ac643c905ac3b896be560bd77de33efab29f669

SHA256
e2cce541a2fa33cff82ef1f1e64b2d59b52dcad0d87720e5db5a21bb36a5ea71

SHA512
0d888003af066c21183470b191a25745428386a62c3a9600c377392a5d13decb301015d2dfd3723139c8c591e468b35918427564c842da4a65220b5daf28012c

Download Submit
C:\Windows\InputMethod\WmiPrvSE.exe

Filesize
1.3MB

MD5
1e9d648839d6df31421c48fc5a58fdb1

SHA1
8824a936225692b169bf16491e85f71149a15a90

SHA256
c66b91cd0446d231445052af25b86edc15127b4313e40457f6697850da21810d

SHA512
02a41349d165462c777970bbc41c5b3b86ad2b5af68c62e7f6e248fb3e169d9ac065039630848d1631a0e10ef43b6870d69c85f20e24904c8e638b6cf8e0f7ea

Download Submit
C:\Windows\InputMethod\WmiPrvSE.exe

Filesize
1.3MB

MD5
1e9d648839d6df31421c48fc5a58fdb1

SHA1
8824a936225692b169bf16491e85f71149a15a90

SHA256
c66b91cd0446d231445052af25b86edc15127b4313e40457f6697850da21810d

SHA512
02a41349d165462c777970bbc41c5b3b86ad2b5af68c62e7f6e248fb3e169d9ac065039630848d1631a0e10ef43b6870d69c85f20e24904c8e638b6cf8e0f7ea

Download Submit
memory/3764-137-0x0000000000000000-mapping.dmp

Download
memory/5036-138-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/5036-132-0x0000000000C60000-0x0000000000DBA000-memory.dmp

Filesize
1.4MB

Download
memory/5036-134-0x0000000002ED0000-0x0000000002F20000-memory.dmp

Filesize
320KB

Download
memory/5036-133-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/5064-139-0x0000000000000000-mapping.dmp

Download
memory/5064-142-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/5064-143-0x00007FFF3BA70000-0x00007FFF3C531000-memory.dmp

Filesize
10.8MB

Download
memory/5064-144-0x000000001DD10000-0x000000001DED2000-memory.dmp

Filesize
1.8MB

Download
memory/5108-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads