dcrat | f6a307d243c407c27489de37adac83e9205be531cbb4e2cb71545627faf813fd

Resubmissions

11-01-2021 13:09

210111-dlhjyngw66 8

11-01-2021 07:36

210111-xfhgmxjy6n 10

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7v20201028
submitted
11-01-2021 07:36

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General

Target

4ced2056e4efe1c93b9f4adaaeaba20c.exe
Size

607KB
MD5

4ced2056e4efe1c93b9f4adaaeaba20c
SHA1

b975777c42d7d8fb04c34a2efc64dc5e4c574712
SHA256

f6a307d243c407c27489de37adac83e9205be531cbb4e2cb71545627faf813fd
SHA512

014df0ad54bf23335f964fa4e313a91b60b3ea2c62b73a306e973177830b573666aaebc1932cafa766042f34b8e32adcfabe3027aae2cc09341fd138a8963eaf

Score

10^/10

dcrat evasion 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

DC Rat Payload 5 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe	dcrat
C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe	dcrat
C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe	dcrat
C:\PerfLogs\Admin\WmiPrvSE.exe	dcrat
C:\PerfLogs\Admin\WmiPrvSE.exe	dcrat

Disables Task Manager via registry modification
evasion
Executes dropped EXE 3 IoCs

Processes:

HoykwG9pmLZ7sZbSP8eb.exewinrar-x84.exeWmiPrvSE.exe

pid process

1252 HoykwG9pmLZ7sZbSP8eb.exe
1528 winrar-x84.exe
268 WmiPrvSE.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.execmd.exe

pid process

1264 cmd.exe
1064 cmd.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
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

6 ipinfo.io
7 ipinfo.io

pid	process
1252	HoykwG9pmLZ7sZbSP8eb.exe
1528	winrar-x84.exe
268	WmiPrvSE.exe

pid	process
1264	cmd.exe
1064	cmd.exe

flow	ioc
6	ipinfo.io
7	ipinfo.io

Drops file in Program Files directory 2 IoCs

Processes:

winrar-x84.exe

description	ioc	process
File created	C:\Program Files (x86)\WindowsPowerShell\Modules\csrss.exe	winrar-x84.exe
File created	C:\Program Files (x86)\WindowsPowerShell\Modules\886983d96e3d3e31032c679b2d4ea91b6c05afef	winrar-x84.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

1396 schtasks.exe
1864 schtasks.exe
1388 schtasks.exe
1636 schtasks.exe
1856 schtasks.exe
1188 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

544 reg.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

winrar-x84.exeWmiPrvSE.exe

pid process

1528 winrar-x84.exe
268 WmiPrvSE.exe
268 WmiPrvSE.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

winrar-x84.exeWmiPrvSE.exe

description pid process

Token: SeDebugPrivilege 1528 winrar-x84.exe
Token: SeDebugPrivilege 268 WmiPrvSE.exe

pid	process
1396	schtasks.exe
1864	schtasks.exe
1388	schtasks.exe
1636	schtasks.exe
1856	schtasks.exe
1188	schtasks.exe

pid	process
544	reg.exe

pid	process
1528	winrar-x84.exe
268	WmiPrvSE.exe
268	WmiPrvSE.exe

description	pid	process
Token: SeDebugPrivilege	1528	winrar-x84.exe
Token: SeDebugPrivilege	268	WmiPrvSE.exe

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

4ced2056e4efe1c93b9f4adaaeaba20c.exeWScript.execmd.exeHoykwG9pmLZ7sZbSP8eb.exeWScript.execmd.exewinrar-x84.exe

description	pid	process	target process
PID 1184 wrote to memory of 1812	1184	4ced2056e4efe1c93b9f4adaaeaba20c.exe	WScript.exe
PID 1184 wrote to memory of 1812	1184	4ced2056e4efe1c93b9f4adaaeaba20c.exe	WScript.exe
PID 1184 wrote to memory of 1812	1184	4ced2056e4efe1c93b9f4adaaeaba20c.exe	WScript.exe
PID 1184 wrote to memory of 1812	1184	4ced2056e4efe1c93b9f4adaaeaba20c.exe	WScript.exe
PID 1812 wrote to memory of 1264	1812	WScript.exe	cmd.exe
PID 1812 wrote to memory of 1264	1812	WScript.exe	cmd.exe
PID 1812 wrote to memory of 1264	1812	WScript.exe	cmd.exe
PID 1812 wrote to memory of 1264	1812	WScript.exe	cmd.exe
PID 1264 wrote to memory of 1252	1264	cmd.exe	HoykwG9pmLZ7sZbSP8eb.exe
PID 1264 wrote to memory of 1252	1264	cmd.exe	HoykwG9pmLZ7sZbSP8eb.exe
PID 1264 wrote to memory of 1252	1264	cmd.exe	HoykwG9pmLZ7sZbSP8eb.exe
PID 1264 wrote to memory of 1252	1264	cmd.exe	HoykwG9pmLZ7sZbSP8eb.exe
PID 1252 wrote to memory of 1028	1252	HoykwG9pmLZ7sZbSP8eb.exe	WScript.exe
PID 1252 wrote to memory of 1028	1252	HoykwG9pmLZ7sZbSP8eb.exe	WScript.exe
PID 1252 wrote to memory of 1028	1252	HoykwG9pmLZ7sZbSP8eb.exe	WScript.exe
PID 1252 wrote to memory of 1028	1252	HoykwG9pmLZ7sZbSP8eb.exe	WScript.exe
PID 1028 wrote to memory of 1064	1028	WScript.exe	cmd.exe
PID 1028 wrote to memory of 1064	1028	WScript.exe	cmd.exe
PID 1028 wrote to memory of 1064	1028	WScript.exe	cmd.exe
PID 1028 wrote to memory of 1064	1028	WScript.exe	cmd.exe
PID 1064 wrote to memory of 1528	1064	cmd.exe	winrar-x84.exe
PID 1064 wrote to memory of 1528	1064	cmd.exe	winrar-x84.exe
PID 1064 wrote to memory of 1528	1064	cmd.exe	winrar-x84.exe
PID 1064 wrote to memory of 1528	1064	cmd.exe	winrar-x84.exe
PID 1528 wrote to memory of 1636	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1636	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1636	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1856	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1856	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1856	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1188	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1188	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1188	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1396	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1396	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1396	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1864	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1864	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1864	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1388	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1388	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 1388	1528	winrar-x84.exe	schtasks.exe
PID 1528 wrote to memory of 268	1528	winrar-x84.exe	WmiPrvSE.exe
PID 1528 wrote to memory of 268	1528	winrar-x84.exe	WmiPrvSE.exe
PID 1528 wrote to memory of 268	1528	winrar-x84.exe	WmiPrvSE.exe
PID 1064 wrote to memory of 544	1064	cmd.exe	reg.exe
PID 1064 wrote to memory of 544	1064	cmd.exe	reg.exe
PID 1064 wrote to memory of 544	1064	cmd.exe	reg.exe
PID 1064 wrote to memory of 544	1064	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\4ced2056e4efe1c93b9f4adaaeaba20c.exe
"C:\Users\Admin\AppData\Local\Temp\4ced2056e4efe1c93b9f4adaaeaba20c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1184

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\WinRAR\wSmIzsMZSTGIPjXygtTeiEZYkIjJjD.vbe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1812

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Roaming\WinRAR\wAcLjfo4uMcnTa1rAjnz0eLcoo04D9.bat" "
3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1264

C:\Users\Admin\AppData\Roaming\WinRAR\HoykwG9pmLZ7sZbSP8eb.exe
HoykwG9pmLZ7sZbSP8eb.exe -p2e840a597483ac4423c7c5ec1a09b39042cbf75d
4⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1252

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\WinRAR\tPKG2uMJtmCS4Bv6TMepBvdoqxAPGa.vbe"
5⤵
- Suspicious use of WriteProcessMemory
PID:1028

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Roaming\WinRAR\mQE440b4P9lIBPO3Qboqf8inqaQoJr.bat" "
6⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1064

C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe
"C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe"
7⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1528

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Recovery\a7611f42-198c-11eb-8a49-ee401b9e63cb\WmiPrvSE.exe'" /rl HIGHEST /f
8⤵
- Creates scheduled task(s)
PID:1636

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f
8⤵
- Creates scheduled task(s)
PID:1856

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\PerfLogs\Admin\wininit.exe'" /rl HIGHEST /f
8⤵
- Creates scheduled task(s)
PID:1188

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\WindowsPowerShell\Modules\csrss.exe'" /rl HIGHEST /f
8⤵
- Creates scheduled task(s)
PID:1396

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Recovery\a7611f42-198c-11eb-8a49-ee401b9e63cb\sppsvc.exe'" /rl HIGHEST /f
8⤵
- Creates scheduled task(s)
PID:1864

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\PerfLogs\Admin\WmiPrvSE.exe'" /rl HIGHEST /f
8⤵
- Creates scheduled task(s)
PID:1388

C:\PerfLogs\Admin\WmiPrvSE.exe
"C:\PerfLogs\Admin\WmiPrvSE.exe"
8⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:268

C:\Windows\SysWOW64\reg.exe
reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
7⤵
- Modifies registry key
PID:544

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\PerfLogs\Admin\WmiPrvSE.exe
MD5
bb15e4323d2b8ce4bb903b05c7b45562

SHA1
c596278a1c30c1c68577c421fbdd21a672cb3622

SHA256
808ccc6e8d8a46dc73a6c18326fd3f484eb8bf52c78602092d1be0c851bc0372

SHA512
f630375b4cc2f4b25c977334d6f90462f6c6f897df2d8bd887f0d9f5e622877fb7f280fda7c5add4d95cd1bef600b060c4bc38780c7c201188f8c0f5a20f5a1f

Download Submit
C:\PerfLogs\Admin\WmiPrvSE.exe
MD5
bb15e4323d2b8ce4bb903b05c7b45562

SHA1
c596278a1c30c1c68577c421fbdd21a672cb3622

SHA256
808ccc6e8d8a46dc73a6c18326fd3f484eb8bf52c78602092d1be0c851bc0372

SHA512
f630375b4cc2f4b25c977334d6f90462f6c6f897df2d8bd887f0d9f5e622877fb7f280fda7c5add4d95cd1bef600b060c4bc38780c7c201188f8c0f5a20f5a1f

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\HoykwG9pmLZ7sZbSP8eb.exe
MD5
92066cc64fbbdc6d4a1b0293f80b2bdd

SHA1
ffa822f85e5d87ea90b8572bbb1bac8c1859b7e0

SHA256
c5d5173a31a341be6e07f90434b2ca20c6d148668ac5c26ea2ecfa200e59e40d

SHA512
0e9fda642e6a56567f1304e93e27b6b82da035aa6e992aaf4691e2879af043178765407452adf775309d08749014e2a6ed3f49a588ed3e855fd261d0749c0104

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\HoykwG9pmLZ7sZbSP8eb.exe
MD5
92066cc64fbbdc6d4a1b0293f80b2bdd

SHA1
ffa822f85e5d87ea90b8572bbb1bac8c1859b7e0

SHA256
c5d5173a31a341be6e07f90434b2ca20c6d148668ac5c26ea2ecfa200e59e40d

SHA512
0e9fda642e6a56567f1304e93e27b6b82da035aa6e992aaf4691e2879af043178765407452adf775309d08749014e2a6ed3f49a588ed3e855fd261d0749c0104

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\mQE440b4P9lIBPO3Qboqf8inqaQoJr.bat
MD5
ed2715cde51a566a09ffc2b014c19151

SHA1
f4c12f15a573acebc744a615a8fed1fcb6ce63fb

SHA256
314aaf622368833d4d7c1dc9810a68990783fe71f77ff398183b750c97a9d1b2

SHA512
015832bd16f920e2f58388d8017a13bcc70d1a128dd03b77e50ab76c6450e9d211a6c54c39913e55ab206b791bebf06bb0207d8e7cb508bef495073508b91de5

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\tPKG2uMJtmCS4Bv6TMepBvdoqxAPGa.vbe
MD5
753c5cefa9d71892e70c2698575acb20

SHA1
38c83d89b6c2f166009bbbfb90e483c0053b6450

SHA256
5b81eb6d542e036272f8c3e02d72a0080be8d31b6c821534568fe6b7f7581d28

SHA512
bc964ed6522b2647575a149329a4ee02cfd54ab964f43747b8fe7d4d615701fc394b99feac16b6d4da6c7dfd6405726386841912d2c38767b9db375c13a86ee9

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\wAcLjfo4uMcnTa1rAjnz0eLcoo04D9.bat
MD5
ce75cfe3a73c8e92c7dbfbc4c945990f

SHA1
da5cbaa82e1c622b29c5971dd299345c1a1274fa

SHA256
be4233a3fb0da15811de2c98fa0c58e60e2af7b98cb449107a198b4167665aef

SHA512
c678ac1d8dccc210e40d02dab9dd7c217e7a36a0e46dd82197dcada4b4b2e3511b6a7ea274936dea1a66de7778608ac2bcaf0dabb3e876a32ea3b21247018d01

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\wSmIzsMZSTGIPjXygtTeiEZYkIjJjD.vbe
MD5
22382236eed1791830d2cb491490686b

SHA1
5927c6f2246eb952efa44d42b7e3e68acdb5d097

SHA256
ba2d08aeb026be4ea0b2ce2e69d77493daf7c111bb1e3ee44e18028df898092f

SHA512
c0bbb9d2f64b0d084b61f94075dc45a612a871676b291d960d2639fec6aa7f4e078411fb50738aa4d515bdb6bab709e323e268ac26d8905a5ae6a6ffe582e94d

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe
MD5
bb15e4323d2b8ce4bb903b05c7b45562

SHA1
c596278a1c30c1c68577c421fbdd21a672cb3622

SHA256
808ccc6e8d8a46dc73a6c18326fd3f484eb8bf52c78602092d1be0c851bc0372

SHA512
f630375b4cc2f4b25c977334d6f90462f6c6f897df2d8bd887f0d9f5e622877fb7f280fda7c5add4d95cd1bef600b060c4bc38780c7c201188f8c0f5a20f5a1f

Download Submit
C:\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe
MD5
bb15e4323d2b8ce4bb903b05c7b45562

SHA1
c596278a1c30c1c68577c421fbdd21a672cb3622

SHA256
808ccc6e8d8a46dc73a6c18326fd3f484eb8bf52c78602092d1be0c851bc0372

SHA512
f630375b4cc2f4b25c977334d6f90462f6c6f897df2d8bd887f0d9f5e622877fb7f280fda7c5add4d95cd1bef600b060c4bc38780c7c201188f8c0f5a20f5a1f

Download Submit
\Users\Admin\AppData\Roaming\WinRAR\HoykwG9pmLZ7sZbSP8eb.exe
MD5
92066cc64fbbdc6d4a1b0293f80b2bdd

SHA1
ffa822f85e5d87ea90b8572bbb1bac8c1859b7e0

SHA256
c5d5173a31a341be6e07f90434b2ca20c6d148668ac5c26ea2ecfa200e59e40d

SHA512
0e9fda642e6a56567f1304e93e27b6b82da035aa6e992aaf4691e2879af043178765407452adf775309d08749014e2a6ed3f49a588ed3e855fd261d0749c0104

Download Submit
\Users\Admin\AppData\Roaming\WinRAR\winrar-x84.exe
MD5
bb15e4323d2b8ce4bb903b05c7b45562

SHA1
c596278a1c30c1c68577c421fbdd21a672cb3622

SHA256
808ccc6e8d8a46dc73a6c18326fd3f484eb8bf52c78602092d1be0c851bc0372

SHA512
f630375b4cc2f4b25c977334d6f90462f6c6f897df2d8bd887f0d9f5e622877fb7f280fda7c5add4d95cd1bef600b060c4bc38780c7c201188f8c0f5a20f5a1f

Download Submit
memory/268-29-0x0000000000000000-mapping.dmp

Download
memory/268-34-0x0000000000E10000-0x0000000000E11000-memory.dmp

Filesize
4KB

Download
memory/268-32-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/544-33-0x0000000000000000-mapping.dmp

Download
memory/1028-11-0x0000000000000000-mapping.dmp

Download
memory/1028-15-0x00000000026F0000-0x00000000026F4000-memory.dmp

Filesize
16KB

Download
memory/1064-14-0x0000000000000000-mapping.dmp

Download
memory/1188-25-0x0000000000000000-mapping.dmp

Download
memory/1252-9-0x0000000000000000-mapping.dmp

Download
memory/1264-5-0x0000000000000000-mapping.dmp

Download
memory/1388-28-0x0000000000000000-mapping.dmp

Download
memory/1396-26-0x0000000000000000-mapping.dmp

Download
memory/1528-21-0x0000000000120000-0x0000000000121000-memory.dmp

Filesize
4KB

Download
memory/1528-20-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/1528-17-0x0000000000000000-mapping.dmp

Download
memory/1636-23-0x0000000000000000-mapping.dmp

Download
memory/1812-6-0x00000000026B0000-0x00000000026B4000-memory.dmp

Filesize
16KB

Download
memory/1812-2-0x0000000000000000-mapping.dmp

Download
memory/1856-24-0x0000000000000000-mapping.dmp

Download
memory/1864-27-0x0000000000000000-mapping.dmp

Download