dcrat | 640c60b075e866cfb3247d92043087ecf89802db24124bd97f1ca1bffa062ccd

General

Target

0ef1669b5a2a031943ebcc66dd1664ad.exe
Size

965KB
MD5

0ef1669b5a2a031943ebcc66dd1664ad
SHA1

13a11b03ad5ad87dbf9ae194bf96253f5fe48f24
SHA256

640c60b075e866cfb3247d92043087ecf89802db24124bd97f1ca1bffa062ccd
SHA512

57c40f13fe0fe14b0dce388f4f8ee64d7965e216f2fb700b29fefc3d1e65d4fc89ea90fa01b74aa5660e0e00077f7e84ec3e6a94a28a5d429f29f494569d60cb
SSDEEP

12288:+K5wpf3kJ7CZIgNw9DAlnZcUUNHuZdYD1cDN+jQ5x+lbbAKLCwzgMl+Vp:R5wp/0CZwDAlnvPa1fjmKbbj+I0

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 6 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	1088	1956	schtasks.exe	26
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	852	1956	schtasks.exe	26
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1808	1956	schtasks.exe	26
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1740	1956	schtasks.exe	26
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1068	1956	schtasks.exe	26
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1736	1956	schtasks.exe	26

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2012-54-0x00000000012F0000-0x00000000013E8000-memory.dmp	dcrat
behavioral1/files/0x0008000000005c50-59.dat	dcrat
behavioral1/files/0x0008000000005c50-60.dat	dcrat
behavioral1/memory/620-61-0x00000000010B0000-0x00000000011A8000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
620	services.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

pid	Process
852	schtasks.exe
1808	schtasks.exe
1740	schtasks.exe
1068	schtasks.exe
1736	schtasks.exe
1088	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2012	0ef1669b5a2a031943ebcc66dd1664ad.exe
620	services.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2012	0ef1669b5a2a031943ebcc66dd1664ad.exe
Token: SeDebugPrivilege	620	services.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 620	2012	0ef1669b5a2a031943ebcc66dd1664ad.exe	33
PID 2012 wrote to memory of 620	2012	0ef1669b5a2a031943ebcc66dd1664ad.exe	33
PID 2012 wrote to memory of 620	2012	0ef1669b5a2a031943ebcc66dd1664ad.exe	33

C:\Users\Admin\AppData\Local\Temp\0ef1669b5a2a031943ebcc66dd1664ad.exe
"C:\Users\Admin\AppData\Local\Temp\0ef1669b5a2a031943ebcc66dd1664ad.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Users\Admin\Music\services.exe
  "C:\Users\Admin\Music\services.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Music\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1088

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Admin\Music\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Music\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1808

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Users\Public\Recorded TV\Sample Media\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Public\Recorded TV\Sample Media\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1068

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Recorded TV\Sample Media\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1736

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

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\Music\services.exe

Filesize
965KB

MD5
a3c35eebb3739c5044f565173b5dbbb2

SHA1
2e9e5d054629e3d09ed1ec30ba33aa5004b490e7

SHA256
8e195290beb5425edc05b5e72255dde931eddba03e2c2a70b64a1fe049e8da75

SHA512
c00c33891555cc745f00519cad749345d483ae6ca84ad7b4b4d162032ab89c3c2fa6b49a66631158aec4926604c3299cc940dc6505ab737c0de5ecba20f41273

Download Submit
C:\Users\Admin\Music\services.exe

Filesize
965KB

MD5
a3c35eebb3739c5044f565173b5dbbb2

SHA1
2e9e5d054629e3d09ed1ec30ba33aa5004b490e7

SHA256
8e195290beb5425edc05b5e72255dde931eddba03e2c2a70b64a1fe049e8da75

SHA512
c00c33891555cc745f00519cad749345d483ae6ca84ad7b4b4d162032ab89c3c2fa6b49a66631158aec4926604c3299cc940dc6505ab737c0de5ecba20f41273

Download Submit
memory/620-61-0x00000000010B0000-0x00000000011A8000-memory.dmp

Filesize
992KB

Download
memory/2012-54-0x00000000012F0000-0x00000000013E8000-memory.dmp

Filesize
992KB

Download
memory/2012-55-0x00000000004E0000-0x00000000004F0000-memory.dmp

Filesize
64KB

Download
memory/2012-56-0x00000000004F0000-0x00000000004FC000-memory.dmp

Filesize
48KB

Download
memory/2012-57-0x000007FEFB9F1000-0x000007FEFB9F3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads