dcrat | 2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb

General

Target

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
Size

757KB
MD5

892d94eeae3c0501181abe6f5c07fd11
SHA1

3c4555d758ae1e695436404a5b0b5347447afc96
SHA256

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb
SHA512

a1c4bcfe4e5118348531ae6c18fdfc3ec3066b193b21c683130b2ea24dc5f9e8bc7212300836af353560eeffbe0a14847e851615d71e0055dced9e455cea359a
SSDEEP

12288:keZM0+7o7YNQxF4WioPJicryGBWECTmvJ52liBXIA5yCJnSr3/35ellbLdV2BQjM:kedfwQ66icoECk52liBXIAMCJnQ3v0lo

Score

10^/10

dcrat infostealer persistence 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 payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral1/memory/996-56-0x00000000010F0000-0x00000000014F8000-memory.dmp	dcrat
behavioral1/memory/996-57-0x00000000010F0000-0x00000000014F8000-memory.dmp	dcrat
behavioral1/memory/316-70-0x0000000000CD0000-0x00000000010D8000-memory.dmp	dcrat
behavioral1/memory/316-71-0x0000000000CD0000-0x00000000010D8000-memory.dmp	dcrat
behavioral1/memory/996-72-0x00000000010F0000-0x00000000014F8000-memory.dmp	dcrat
behavioral1/memory/316-73-0x0000000000CD0000-0x00000000010D8000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

316 svchost.exe
Loads dropped DLL 1 IoCs

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe

pid process

996 2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe

pid	process
316	svchost.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\Users\\Default\\Links\\System.exe\""	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Users\\All Users\\Favorites\\lsass.exe\""	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Documents and Settings\\lsm.exe\""	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Documents and Settings\\lsass.exe\""	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Windows\\ja-JP\\svchost.exe\""	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Windows\\Prefetch\\ReadyBoot\\svchost.exe\""	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exesvchost.exe

pid	process
996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
316	svchost.exe
316	svchost.exe
316	svchost.exe

Drops file in Windows directory 4 IoCs

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe

description	ioc	process
File created	C:\Windows\ja-JP\svchost.exe	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
File created	C:\Windows\ja-JP\f4d236fdec2fd03914189c3b26e5cb0dfea9d761	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
File created	C:\Windows\Prefetch\ReadyBoot\svchost.exe	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
File created	C:\Windows\Prefetch\ReadyBoot\f4d236fdec2fd03914189c3b26e5cb0dfea9d761	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe

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

1640 schtasks.exe
1912 schtasks.exe
1144 schtasks.exe
280 schtasks.exe
804 schtasks.exe
980 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exesvchost.exe

pid process

996 2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
316 svchost.exe

pid	process
1640	schtasks.exe
1912	schtasks.exe
1144	schtasks.exe
280	schtasks.exe
804	schtasks.exe
980	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exesvchost.exe

description	pid	process
Token: SeDebugPrivilege	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
Token: SeDebugPrivilege	316	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exesvchost.exe

pid process

996 2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
316 svchost.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe

description	pid	process	target process
PID 996 wrote to memory of 1640	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1640	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1640	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1640	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1912	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1912	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1912	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1912	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1144	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1144	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1144	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 1144	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 280	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 280	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 280	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 280	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 804	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 804	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 804	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 804	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 980	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 980	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 980	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 980	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	schtasks.exe
PID 996 wrote to memory of 316	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	svchost.exe
PID 996 wrote to memory of 316	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	svchost.exe
PID 996 wrote to memory of 316	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	svchost.exe
PID 996 wrote to memory of 316	996	2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe
"C:\Users\Admin\AppData\Local\Temp\2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:996

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "System" /sc ONLOGON /tr "'C:\Users\Default\Links\System.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1640

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\All Users\Favorites\lsass.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1912

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "lsm" /sc ONLOGON /tr "'C:\Documents and Settings\lsm.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1144

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "lsass" /sc ONLOGON /tr "'C:\Documents and Settings\lsass.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:280

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Windows\ja-JP\svchost.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:804

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Windows\Prefetch\ReadyBoot\svchost.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:980

C:\Windows\Prefetch\ReadyBoot\svchost.exe
"C:\Windows\Prefetch\ReadyBoot\svchost.exe"
2⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:316

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\Prefetch\ReadyBoot\svchost.exe
Filesize
757KB

MD5
892d94eeae3c0501181abe6f5c07fd11

SHA1
3c4555d758ae1e695436404a5b0b5347447afc96

SHA256
2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb

SHA512
a1c4bcfe4e5118348531ae6c18fdfc3ec3066b193b21c683130b2ea24dc5f9e8bc7212300836af353560eeffbe0a14847e851615d71e0055dced9e455cea359a

Download Submit
C:\Windows\Prefetch\ReadyBoot\svchost.exe
Filesize
757KB

MD5
892d94eeae3c0501181abe6f5c07fd11

SHA1
3c4555d758ae1e695436404a5b0b5347447afc96

SHA256
2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb

SHA512
a1c4bcfe4e5118348531ae6c18fdfc3ec3066b193b21c683130b2ea24dc5f9e8bc7212300836af353560eeffbe0a14847e851615d71e0055dced9e455cea359a

Download Submit
\??\c:\users\admin\appdata\local\temp\80EB2F5C
Filesize
14B

MD5
0f23365183a767a0103be4db061899f2

SHA1
cf2bfd48c1e347ebf4d5a08f836cbb9bf1731c87

SHA256
f1a9b003ae175bc74e3abf0acb66aad36b2393545f7aa7818b13fa723f0abeb0

SHA512
15546c07d91bf7be33f00efdabd97bdec177f968e66b9c1f8b7c39d6c856fdca74d5867a038ebe30870339e210ea8341b13f6cec1e0d62cc3e2997fa92a74d3e

Download Submit
\Windows\Prefetch\ReadyBoot\svchost.exe
Filesize
757KB

MD5
892d94eeae3c0501181abe6f5c07fd11

SHA1
3c4555d758ae1e695436404a5b0b5347447afc96

SHA256
2ffa712d8f0bd9a4441047edce9e9f28d88ff15d26513b0cdf1925f6df461ecb

SHA512
a1c4bcfe4e5118348531ae6c18fdfc3ec3066b193b21c683130b2ea24dc5f9e8bc7212300836af353560eeffbe0a14847e851615d71e0055dced9e455cea359a

Download Submit
memory/280-61-0x0000000000000000-mapping.dmp

Download
memory/316-73-0x0000000000CD0000-0x00000000010D8000-memory.dmp

Filesize
4.0MB

Download
memory/316-71-0x0000000000CD0000-0x00000000010D8000-memory.dmp

Filesize
4.0MB

Download
memory/316-70-0x0000000000CD0000-0x00000000010D8000-memory.dmp

Filesize
4.0MB

Download
memory/316-65-0x0000000000000000-mapping.dmp

Download
memory/804-62-0x0000000000000000-mapping.dmp

Download
memory/980-63-0x0000000000000000-mapping.dmp

Download
memory/996-54-0x0000000075E11000-0x0000000075E13000-memory.dmp

Filesize
8KB

Download
memory/996-57-0x00000000010F0000-0x00000000014F8000-memory.dmp

Filesize
4.0MB

Download
memory/996-56-0x00000000010F0000-0x00000000014F8000-memory.dmp

Filesize
4.0MB

Download
memory/996-72-0x00000000010F0000-0x00000000014F8000-memory.dmp

Filesize
4.0MB

Download
memory/996-55-0x00000000010F0000-0x00000000014F8000-memory.dmp

Filesize
4.0MB

Download
memory/1144-60-0x0000000000000000-mapping.dmp

Download
memory/1640-58-0x0000000000000000-mapping.dmp

Download
memory/1912-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads