dcrat | 82039f0956002ab4215ac1eec5ae1951408ff0fea64f87f924fd46faf844f15e

General

Target

JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Size

2.0MB
MD5

1d55b32e2aee97d34060fd2c3b416c14
SHA1

f4eb512aa5c0fb9059a8fae1cd822bd9c91992cf
SHA256

82039f0956002ab4215ac1eec5ae1951408ff0fea64f87f924fd46faf844f15e
SHA512

0ac15e8795e3b52f8c01c376d17d321072ecf3eec9d363239ab24f2194595f6a29eb4cbd195cc29e820130f1d4a8811802c6563cf8431c438725cb9b46859010
SSDEEP

49152:fA6rKdfybQlb8Em0lP/PHNQsGE6+tlcwDXbuvDtk:XrKngUlPtQsG831burK

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 family
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	2704	2840	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2724	2840	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2696	2840	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2528	2840	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2568	2840	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	264	2840	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2880-1-0x0000000001280000-0x0000000001492000-memory.dmp	dcrat
behavioral1/files/0x0005000000019481-11.dat	dcrat
behavioral1/memory/2612-23-0x00000000011D0000-0x00000000013E2000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2612	wininit.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\System32\\qasf\\wininit.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Program Files\\Windows Mail\\de-DE\\lsass.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\System32\\C_1258\\wininit.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14 = "\"C:\\MSOCache\\All Users\\{90140000-0018-0409-0000-0000000FF1CE}-C\\JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\chkntfs\\winlogon.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\DHCPQEC\\winlogon.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

Drops file in System32 directory 9 IoCs

description	ioc	Process
File created	C:\Windows\System32\chkntfs\winlogon.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\qasf\wininit.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\C_1258\560854153607923c4c5f107085a7db67be01f252	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\C_1258\wininit.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\chkntfs\cc11b995f2a76da408ea6a601e682e64743153ad	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\DHCPQEC\winlogon.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\DHCPQEC\cc11b995f2a76da408ea6a601e682e64743153ad	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File opened for modification	C:\Windows\System32\qasf\wininit.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\qasf\560854153607923c4c5f107085a7db67be01f252	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Mail\de-DE\lsass.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Program Files\Windows Mail\de-DE\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2528	schtasks.exe
2568	schtasks.exe
264	schtasks.exe
2704	schtasks.exe
2724	schtasks.exe
2696	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
2612	wininit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Token: SeDebugPrivilege	2612	wininit.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2880 wrote to memory of 708	2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe	37
PID 2880 wrote to memory of 708	2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe	37
PID 2880 wrote to memory of 708	2880	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe	37
PID 708 wrote to memory of 1732	708	cmd.exe	39
PID 708 wrote to memory of 1732	708	cmd.exe	39
PID 708 wrote to memory of 1732	708	cmd.exe	39
PID 708 wrote to memory of 2612	708	cmd.exe	40
PID 708 wrote to memory of 2612	708	cmd.exe	40
PID 708 wrote to memory of 2612	708	cmd.exe	40

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2880
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\a2Bi7XNN77.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:708
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1732
- - C:\Windows\System32\qasf\wininit.exe
    "C:\Windows\System32\qasf\wininit.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\qasf\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\de-DE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2724

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\C_1258\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0018-0409-0000-0000000FF1CE}-C\JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2528

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\chkntfs\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2568

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\DHCPQEC\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\a2Bi7XNN77.bat

Filesize
200B

MD5
0096093a9f55c92fea3dde4df3963a8e

SHA1
46babcb6725a89860bff99db8ced46863d044bff

SHA256
512171749ebfb3b3016a0afbb32347252adde3c8c3af81d5fe6fffbd728b1338

SHA512
4a496bb22c592236ab1cdf4d87abb42e2ffaec092433562a8c5c30b968147fff42eba8ebdebc1d8de4a03c633c6f44a1fa5f0cfa56d491c268166f33a31c4f47

Download Submit
C:\Windows\System32\chkntfs\winlogon.exe

Filesize
2.0MB

MD5
1d55b32e2aee97d34060fd2c3b416c14

SHA1
f4eb512aa5c0fb9059a8fae1cd822bd9c91992cf

SHA256
82039f0956002ab4215ac1eec5ae1951408ff0fea64f87f924fd46faf844f15e

SHA512
0ac15e8795e3b52f8c01c376d17d321072ecf3eec9d363239ab24f2194595f6a29eb4cbd195cc29e820130f1d4a8811802c6563cf8431c438725cb9b46859010

Download Submit
memory/2612-23-0x00000000011D0000-0x00000000013E2000-memory.dmp

Filesize
2.1MB

Download
memory/2612-25-0x00000000003F0000-0x00000000003FC000-memory.dmp

Filesize
48KB

Download
memory/2612-24-0x00000000003C0000-0x00000000003CC000-memory.dmp

Filesize
48KB

Download
memory/2612-26-0x00000000003E0000-0x00000000003E8000-memory.dmp

Filesize
32KB

Download
memory/2612-27-0x0000000000D20000-0x0000000000D76000-memory.dmp

Filesize
344KB

Download
memory/2612-28-0x00000000003D0000-0x00000000003DA000-memory.dmp

Filesize
40KB

Download
memory/2612-29-0x0000000000420000-0x0000000000428000-memory.dmp

Filesize
32KB

Download
memory/2612-30-0x00000000005D0000-0x00000000005D8000-memory.dmp

Filesize
32KB

Download
memory/2880-2-0x000007FEF5E30000-0x000007FEF681C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-1-0x0000000001280000-0x0000000001492000-memory.dmp

Filesize
2.1MB

Download
memory/2880-20-0x000007FEF5E30000-0x000007FEF681C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-0-0x000007FEF5E33000-0x000007FEF5E34000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads