dcrat | b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205

Analysis

max time kernel
95s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-11-2024 18:03

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General

Target

b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe
Size

4.2MB
MD5

2608e3e0677de70d9e1eb6b108f7bdfd
SHA1

c7d42a6abb29fcbde1cdc13f681d449ced6b8a50
SHA256

b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205
SHA512

e1664a02f3e0b101ada2ef5af8fdebc4b75aecc795c1fa04cab36e7b478c11516d8daba1f65159ad7d8c2b9680dd771fac5ba24218b861807851042f1ba82c9d
SSDEEP

49152:2chlG/HMHyN4pAEx/7dvDhzETOIntW9y3yP2QAuxQzxEzwYjiwVTkO2kZBtk8hJq:

Score

10^/10

dcrat discovery 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
Dcrat family
dcrat

Detected Nirsoft tools 1 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral2/files/0x000c000000023b37-8.dat	Nirsoft

Checks computer location settings 2 TTPs 4 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exedrivEn994.exeWScript.exesurrogateProviderRuntime.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	drivEn994.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	surrogateProviderRuntime.exe

Executes dropped EXE 4 IoCs

Processes:

sqls639.exedrivEn994.exesurrogateProviderRuntime.execsrss.exe

pid	Process
5044	sqls639.exe
2416	drivEn994.exe
4824	surrogateProviderRuntime.exe
1516	csrss.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 5 IoCs

Processes:

surrogateProviderRuntime.exe

description	ioc	Process
File opened for modification	C:\Program Files\Windows Security\BrowserCore\dllhost.exe	surrogateProviderRuntime.exe
File created	C:\Program Files\Windows Security\BrowserCore\5940a34987c991	surrogateProviderRuntime.exe
File created	C:\Program Files\Mozilla Firefox\dllhost.exe	surrogateProviderRuntime.exe
File created	C:\Program Files\Mozilla Firefox\5940a34987c991	surrogateProviderRuntime.exe
File created	C:\Program Files\Windows Security\BrowserCore\dllhost.exe	surrogateProviderRuntime.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

WScript.execmd.exesqls639.exedrivEn994.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sqls639.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	drivEn994.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

Processes:

PING.EXE

pid	Process
4384	PING.EXE

Modifies registry class 2 IoCs

Processes:

drivEn994.exesurrogateProviderRuntime.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings	drivEn994.exe
Key created	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings	surrogateProviderRuntime.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
4384	PING.EXE

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

surrogateProviderRuntime.execsrss.exe

pid	Process
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
4824	surrogateProviderRuntime.exe
1516	csrss.exe
1516	csrss.exe
1516	csrss.exe
1516	csrss.exe
1516	csrss.exe
1516	csrss.exe
1516	csrss.exe
1516	csrss.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

sqls639.exe

description	pid	Process
Token: SeBackupPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeBackupPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeBackupPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe
Token: SeSecurityPrivilege	5044	sqls639.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exedrivEn994.exeWScript.execmd.exesurrogateProviderRuntime.execmd.exe

description	pid	Process	procid_target
PID 4304 wrote to memory of 5044	4304	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	83
PID 4304 wrote to memory of 5044	4304	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	83
PID 4304 wrote to memory of 5044	4304	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	83
PID 4304 wrote to memory of 2416	4304	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	84
PID 4304 wrote to memory of 2416	4304	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	84
PID 4304 wrote to memory of 2416	4304	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	84
PID 2416 wrote to memory of 4508	2416	drivEn994.exe	85
PID 2416 wrote to memory of 4508	2416	drivEn994.exe	85
PID 2416 wrote to memory of 4508	2416	drivEn994.exe	85
PID 4508 wrote to memory of 440	4508	WScript.exe	99
PID 4508 wrote to memory of 440	4508	WScript.exe	99
PID 4508 wrote to memory of 440	4508	WScript.exe	99
PID 440 wrote to memory of 4824	440	cmd.exe	101
PID 440 wrote to memory of 4824	440	cmd.exe	101
PID 4824 wrote to memory of 1536	4824	surrogateProviderRuntime.exe	102
PID 4824 wrote to memory of 1536	4824	surrogateProviderRuntime.exe	102
PID 1536 wrote to memory of 4128	1536	cmd.exe	104
PID 1536 wrote to memory of 4128	1536	cmd.exe	104
PID 1536 wrote to memory of 4384	1536	cmd.exe	105
PID 1536 wrote to memory of 4384	1536	cmd.exe	105
PID 1536 wrote to memory of 1516	1536	cmd.exe	109
PID 1536 wrote to memory of 1516	1536	cmd.exe	109

C:\Users\Admin\AppData\Local\Temp\b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe
"C:\Users\Admin\AppData\Local\Temp\b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Users\Admin\AppData\Local\Temp\sqls639.exe
  "C:\Users\Admin\AppData\Local\Temp\sqls639.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:5044
- C:\Users\Admin\AppData\Local\Temp\drivEn994.exe
  "C:\Users\Admin\AppData\Local\Temp\drivEn994.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2416
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\browserFont\TGs0Esj.vbe"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4508
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\browserFont\mb1tDxvM2A2eBj7RCoqZN.bat" "
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:440
    - - C:\browserFont\surrogateProviderRuntime.exe
        
        "C:\browserFont/surrogateProviderRuntime.exe"
        5⤵
        Checks computer location settings
        Executes dropped EXE
        Drops file in Program Files directory
        Modifies registry class
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:4824
      - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\JTZ1mPKJeJ.bat"
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:1536
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        7⤵
        
        PID:4128
        
        C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        7⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:4384
        
        C:\Users\Default User\csrss.exe
        
        "C:\Users\Default User\csrss.exe"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        
        PID:1516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\JTZ1mPKJeJ.bat

Filesize
159B

MD5
6fffeb758c4951f6453633327ede126f

SHA1
1e6ff6de1582d1cb58fbcc67f72ef7d8834b7e59

SHA256
b4055316ad54a4f5fd65e458f1c6001d8e292f567d09ed34b3a8829d9f588db2

SHA512
5588f114b382c56f9e665616b732063f24700faf746402b6e1bf80a27b078440daabff427c0c1c809162881c55ce773aab9a2dcf17fda0f1166360986455d075

Download Submit
C:\Users\Admin\AppData\Local\Temp\drivEn994.exe

Filesize
1.4MB

MD5
c04481d4d848f2edb537085ffdef01c5

SHA1
d0c1d5c2efdc1460b577720eb633c23876ada172

SHA256
a9cefa666264302fae07664e374cc1cf3b29a956f1da1219013853c66b4b0c46

SHA512
f3edf74e3ee0438999a64496cafa5a6485efae74f54674d73a2b4979de0483c896e28fab2376c40399d9cd6d627c56fefe5c652ed00671487250dacb7a05833c

Download Submit
C:\Users\Admin\AppData\Local\Temp\sqls639.exe

Filesize
130KB

MD5
f27a284ef9b018cdd2a98a7b78ccdcb3

SHA1
67e260b11e6227c18cae8925b4f6899103c607f2

SHA256
af86dc3f76d39b67b967a3b714e9e70ed43eec8d3871e9691cb45d84372b53fb

SHA512
9a8811f13517748539308a70933b126a3348407f397bf30f903019379f927532c64015853b94acf21bdbc554d638a0265d4394d026e289103db06fe93fe5524b

Download Submit
C:\browserFont\TGs0Esj.vbe

Filesize
211B

MD5
fc357bcdbf37df98247d511ccd38d22d

SHA1
0c4678b855b654c4a7182acec115482f3c7e4c5c

SHA256
41e73fcfa7fda29c62dd424e2eef794ba21c69239a1d0e4f92f29257162d4dc1

SHA512
d5370ef435382cd3192cd2b79374b270cf107b3f87132c8b09ce159603062c7f331f8b155a90789a68eaae85908bb9a3a1593247594f215412018ad0b061879d

Download Submit
C:\browserFont\mb1tDxvM2A2eBj7RCoqZN.bat

Filesize
85B

MD5
6bf7667bb9a6e818187ce67416332560

SHA1
57ebd093a1349a374aa13851cd1ff437b0c8fe14

SHA256
8ca638a3493bfef0418b1abc231eeac08d86f64853cbbf0ba8ad0d3d0d400d76

SHA512
1105eb7d88058d4a646a4cc0937c813ecbb36a988ce66e739a8b24147f2038860ed9f2ca4486ed7233d79692bdc2ee9ca933b3b00d8233d91fc3f9447f93a0be

Download Submit
C:\browserFont\surrogateProviderRuntime.exe

Filesize
1.6MB

MD5
418fcd513c372d02a740a87d9c4d0d5f

SHA1
32180f6394d72e1f5ca2cfebbe683b6fbcb8da34

SHA256
67c96692f7eff8187ab7a8d54cb15cfa9ae91732c72a6bac093982d1b4838411

SHA512
6eb8ebc542e8653e4ef8133c23c3618cd12203adbc6761fb7871b0c1df65609182fec13536cf28687db618b7c9a21dd06f90f77018c4cc3e778cc7136cc07458

Download Submit
memory/4304-0-0x00007FFFADFE5000-0x00007FFFADFE6000-memory.dmp

Filesize
4KB

Download
memory/4304-1-0x00007FFFADD30000-0x00007FFFAE6D1000-memory.dmp

Filesize
9.6MB

Download
memory/4304-4-0x00007FFFADD30000-0x00007FFFAE6D1000-memory.dmp

Filesize
9.6MB

Download
memory/4304-23-0x00007FFFADD30000-0x00007FFFAE6D1000-memory.dmp

Filesize
9.6MB

Download
memory/4824-36-0x0000000000960000-0x0000000000AF8000-memory.dmp

Filesize
1.6MB

Download