dcrat | 08acc4229c4d8424570ee93f20f7c60a0e9e0605f7dc8594d14d52209b72ce00

General

Target

f4787944e95596ad1847910ce4180a20.exe
Size

942KB
MD5

f4787944e95596ad1847910ce4180a20
SHA1

f6ec2109ff3f3985ee6f73d0cf680343a90c8b2b
SHA256

08acc4229c4d8424570ee93f20f7c60a0e9e0605f7dc8594d14d52209b72ce00
SHA512

5466b793806093f291a0712846510c3573654bb7d0ded3b9f2a91a0238bd14ae4926fb1f1111a62b1c4e570f9ece54c2019c16c60b9c1af145b67ef9607e894b

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

DCRat Payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
C:\FontsavesInto\FontsavesIntorefperf.exe	dcrat
C:\FontsavesInto\FontsavesIntorefperf.exe	dcrat
C:\Windows\System32\srumapi\sihost.exe	dcrat
C:\Windows\System32\srumapi\sihost.exe	dcrat

Executes dropped EXE 2 IoCs

Processes:

FontsavesIntorefperf.exesihost.exe

pid process

3484 FontsavesIntorefperf.exe
3612 sihost.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

19 ipinfo.io
20 ipinfo.io

flow	ioc
19	ipinfo.io
20	ipinfo.io

Drops file in System32 directory 7 IoCs

Processes:

FontsavesIntorefperf.exe

description	ioc	process
File created	C:\Windows\System32\srumapi\66fc9ff0ee96c2b21f0cfded48750ae9e3032bf3	FontsavesIntorefperf.exe
File created	C:\Windows\System32\wbem\WsmAgent\WmiPrvSE.exe	FontsavesIntorefperf.exe
File opened for modification	C:\Windows\System32\wbem\WsmAgent\WmiPrvSE.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\wbem\WsmAgent\24dbde2999530ef5fd907494bc374d663924116c	FontsavesIntorefperf.exe
File created	C:\Windows\System32\KBDSF\fontdrvhost.exe	FontsavesIntorefperf.exe
File created	C:\Windows\System32\KBDSF\5b884080fd4f94e2695da25c503f9e33b9605b83	FontsavesIntorefperf.exe
File created	C:\Windows\System32\srumapi\sihost.exe	FontsavesIntorefperf.exe

Drops file in Program Files directory 2 IoCs

Processes:

FontsavesIntorefperf.exe

description	ioc	process
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems64\OfficeClickToRun.exe	FontsavesIntorefperf.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems64\e6c9b481da804f07baff8eff543b0a1441069b5d	FontsavesIntorefperf.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 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

2928 schtasks.exe
2424 schtasks.exe
3116 schtasks.exe
4084 schtasks.exe

pid	process
2928	schtasks.exe
2424	schtasks.exe
3116	schtasks.exe
4084	schtasks.exe

Modifies registry class 1 IoCs

Processes:

f4787944e95596ad1847910ce4180a20.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	f4787944e95596ad1847910ce4180a20.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

Processes:

FontsavesIntorefperf.exesihost.exe

pid	process
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3484	FontsavesIntorefperf.exe
3612	sihost.exe
3612	sihost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

sihost.exe

pid process

3612 sihost.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

FontsavesIntorefperf.exesihost.exe

description pid process

Token: SeDebugPrivilege 3484 FontsavesIntorefperf.exe
Token: SeDebugPrivilege 3612 sihost.exe

pid	process
3612	sihost.exe

description	pid	process
Token: SeDebugPrivilege	3484	FontsavesIntorefperf.exe
Token: SeDebugPrivilege	3612	sihost.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

f4787944e95596ad1847910ce4180a20.exeWScript.execmd.exeFontsavesIntorefperf.exe

description	pid	process	target process
PID 3008 wrote to memory of 3532	3008	f4787944e95596ad1847910ce4180a20.exe	WScript.exe
PID 3008 wrote to memory of 3532	3008	f4787944e95596ad1847910ce4180a20.exe	WScript.exe
PID 3008 wrote to memory of 3532	3008	f4787944e95596ad1847910ce4180a20.exe	WScript.exe
PID 3532 wrote to memory of 4036	3532	WScript.exe	cmd.exe
PID 3532 wrote to memory of 4036	3532	WScript.exe	cmd.exe
PID 3532 wrote to memory of 4036	3532	WScript.exe	cmd.exe
PID 4036 wrote to memory of 3484	4036	cmd.exe	FontsavesIntorefperf.exe
PID 4036 wrote to memory of 3484	4036	cmd.exe	FontsavesIntorefperf.exe
PID 3484 wrote to memory of 2424	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 2424	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 3116	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 3116	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 4084	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 4084	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 2928	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 2928	3484	FontsavesIntorefperf.exe	schtasks.exe
PID 3484 wrote to memory of 3612	3484	FontsavesIntorefperf.exe	sihost.exe
PID 3484 wrote to memory of 3612	3484	FontsavesIntorefperf.exe	sihost.exe

C:\Users\Admin\AppData\Local\Temp\f4787944e95596ad1847910ce4180a20.exe
"C:\Users\Admin\AppData\Local\Temp\f4787944e95596ad1847910ce4180a20.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\FontsavesInto\m8aBJ5FB2D94qk25GJ.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3532
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\FontsavesInto\5X6xHq8OosomjmO.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4036
  - - C:\FontsavesInto\FontsavesIntorefperf.exe
      "C:\FontsavesInto\FontsavesIntorefperf.exe"
      4⤵
      Executes dropped EXE
      Drops file in System32 directory
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3484
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\WsmAgent\WmiPrvSE.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2424
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\KBDSF\fontdrvhost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:3116
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems64\OfficeClickToRun.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:4084
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\System32\srumapi\sihost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2928
    - - C:\Windows\System32\srumapi\sihost.exe
        
        "C:\Windows\System32\srumapi\sihost.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:3612

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\FontsavesInto\5X6xHq8OosomjmO.bat

MD5
69a93d9784094ed30087e525d8e5ca93

SHA1
e441ac2e33082d55745c23ff7d6eef726f6c716a

SHA256
f91a106ad3e48562b43ee4145edb307f4994eff2aac723032c45c838c9b15b58

SHA512
80079b263f6e7cd0a6accd8bd4b5ed7726efdfda5263957c60a904e1e622691e0e2b63ff9c3029e03e377049adbf06c50204cdb9ec47d535d52e331c72ba3fb6

Download Submit
C:\FontsavesInto\FontsavesIntorefperf.exe

MD5
6bea156153d2dcd0bb45e379333f8da8

SHA1
9383d9f769297fd43591390b9642d8b3ee6c47ec

SHA256
16d74e63bd0f09ecb21133532c18c3fbb6582b4696914277c0e7a986dd40a40d

SHA512
40fd958f6cefb12b92fe757ec3d8fec8e56f0c91a627e3b5587d8e751d04d0af7eea78b05e73067800cb306d45a7d4ea00683423b92582c2fdb07017c1127251

Download Submit
C:\FontsavesInto\FontsavesIntorefperf.exe

MD5
6bea156153d2dcd0bb45e379333f8da8

SHA1
9383d9f769297fd43591390b9642d8b3ee6c47ec

SHA256
16d74e63bd0f09ecb21133532c18c3fbb6582b4696914277c0e7a986dd40a40d

SHA512
40fd958f6cefb12b92fe757ec3d8fec8e56f0c91a627e3b5587d8e751d04d0af7eea78b05e73067800cb306d45a7d4ea00683423b92582c2fdb07017c1127251

Download Submit
C:\FontsavesInto\m8aBJ5FB2D94qk25GJ.vbe

MD5
190d748d25680584fe1b63a74f480b29

SHA1
71e99245cb768b3d4fbcb532dbe0f9e48f46c4ff

SHA256
ac99dee81aaf04088144ec0926ff227e0ada78e2c4d1a4c0e6f5cd3106e69b21

SHA512
294b2f4fafafcfa12d7c11477486492709b3e61e3ddd98eddfe5e44574e3c0cb5e1bf8adbf7bad9074a0912c16a114b11bd2c487312a21c3b806e282ae8e62a9

Download Submit
C:\Windows\System32\srumapi\sihost.exe

MD5
6bea156153d2dcd0bb45e379333f8da8

SHA1
9383d9f769297fd43591390b9642d8b3ee6c47ec

SHA256
16d74e63bd0f09ecb21133532c18c3fbb6582b4696914277c0e7a986dd40a40d

SHA512
40fd958f6cefb12b92fe757ec3d8fec8e56f0c91a627e3b5587d8e751d04d0af7eea78b05e73067800cb306d45a7d4ea00683423b92582c2fdb07017c1127251

Download Submit
C:\Windows\System32\srumapi\sihost.exe

MD5
6bea156153d2dcd0bb45e379333f8da8

SHA1
9383d9f769297fd43591390b9642d8b3ee6c47ec

SHA256
16d74e63bd0f09ecb21133532c18c3fbb6582b4696914277c0e7a986dd40a40d

SHA512
40fd958f6cefb12b92fe757ec3d8fec8e56f0c91a627e3b5587d8e751d04d0af7eea78b05e73067800cb306d45a7d4ea00683423b92582c2fdb07017c1127251

Download Submit
memory/2424-13-0x0000000000000000-mapping.dmp

Download
memory/2928-16-0x0000000000000000-mapping.dmp

Download
memory/3116-14-0x0000000000000000-mapping.dmp

Download
memory/3484-10-0x0000018AE53C0000-0x0000018AE53C1000-memory.dmp

Filesize
4KB

Download
memory/3484-12-0x0000018AFF900000-0x0000018AFF902000-memory.dmp

Filesize
8KB

Download
memory/3484-6-0x0000000000000000-mapping.dmp

Download
memory/3484-9-0x00007FFCA1E60000-0x00007FFCA284C000-memory.dmp

Filesize
9.9MB

Download
memory/3532-2-0x0000000000000000-mapping.dmp

Download
memory/3612-17-0x0000000000000000-mapping.dmp

Download
memory/3612-20-0x00007FFCA1E60000-0x00007FFCA284C000-memory.dmp

Filesize
9.9MB

Download
memory/3612-23-0x0000026290D90000-0x0000026290D92000-memory.dmp

Filesize
8KB

Download
memory/3612-24-0x0000026290DC0000-0x0000026290DC1000-memory.dmp

Filesize
4KB

Download
memory/4036-5-0x0000000000000000-mapping.dmp

Download
memory/4084-15-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads