dcrat | 45bb804f2217118de509c8aa1f6366aa64a6c9ba596236cf36cb0f814e4b1080

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2023, 10:01

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General

Target

ac27c0a6f62525fe96a24691ab05e83e.exe
Size

1.3MB
MD5

ac27c0a6f62525fe96a24691ab05e83e
SHA1

8c4e59a5aec502672f45bdb82b5f430ddb3d54e7
SHA256

45bb804f2217118de509c8aa1f6366aa64a6c9ba596236cf36cb0f814e4b1080
SHA512

d4c605a6b2eabf0a1d035b67794271e4949638f2da71c5e0ebbdb861a757af9987d64950ee13290f445abf1227ca293e394ba4eaff64d86a8944de2e9b925289
SSDEEP

24576:U2G/nvxW3Ww0t6TnzGmVBDh4+aknuRRZJND0gFJ4rD/IjC:UbA30GnzV/q+DnsXg

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	4920	3944	schtasks.exe	53
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1184	3944	schtasks.exe	53
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4844	3944	schtasks.exe	53
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4804	3944	schtasks.exe	53
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4884	3944	schtasks.exe	53
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4788	3944	schtasks.exe	53

DCRat payload 5 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x000200000001e2c7-137.dat	dcrat
behavioral2/files/0x000200000001e2c7-138.dat	dcrat
behavioral2/memory/4460-139-0x0000000000A90000-0x0000000000BA0000-memory.dmp	dcrat
behavioral2/files/0x0008000000022e32-147.dat	dcrat
behavioral2/files/0x0008000000022e32-146.dat	dcrat

Checks computer location settings 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	DllCommonsvc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	ac27c0a6f62525fe96a24691ab05e83e.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
4460	DllCommonsvc.exe
5064	taskhostw.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe	DllCommonsvc.exe
File created	C:\Windows\Branding\Basebrd\it-IT\ea9f0e6c9e2dcd	DllCommonsvc.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
4788	schtasks.exe
4920	schtasks.exe
1184	schtasks.exe
4844	schtasks.exe
4804	schtasks.exe
4884	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	ac27c0a6f62525fe96a24691ab05e83e.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
4460	DllCommonsvc.exe
1952	powershell.exe
4600	powershell.exe
3720	powershell.exe
4600	powershell.exe
1952	powershell.exe
5064	taskhostw.exe
3720	powershell.exe
5064	taskhostw.exe
5064	taskhostw.exe
5064	taskhostw.exe
5064	taskhostw.exe
5064	taskhostw.exe
5064	taskhostw.exe
5064	taskhostw.exe
5064	taskhostw.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5064	taskhostw.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4460	DllCommonsvc.exe
Token: SeDebugPrivilege	1952	powershell.exe
Token: SeDebugPrivilege	4600	powershell.exe
Token: SeDebugPrivilege	3720	powershell.exe
Token: SeDebugPrivilege	5064	taskhostw.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 4192	1280	ac27c0a6f62525fe96a24691ab05e83e.exe	81
PID 1280 wrote to memory of 4192	1280	ac27c0a6f62525fe96a24691ab05e83e.exe	81
PID 1280 wrote to memory of 4192	1280	ac27c0a6f62525fe96a24691ab05e83e.exe	81
PID 4192 wrote to memory of 2184	4192	WScript.exe	82
PID 4192 wrote to memory of 2184	4192	WScript.exe	82
PID 4192 wrote to memory of 2184	4192	WScript.exe	82
PID 2184 wrote to memory of 4460	2184	cmd.exe	84
PID 2184 wrote to memory of 4460	2184	cmd.exe	84
PID 4460 wrote to memory of 3720	4460	DllCommonsvc.exe	91
PID 4460 wrote to memory of 3720	4460	DllCommonsvc.exe	91
PID 4460 wrote to memory of 1952	4460	DllCommonsvc.exe	92
PID 4460 wrote to memory of 1952	4460	DllCommonsvc.exe	92
PID 4460 wrote to memory of 4600	4460	DllCommonsvc.exe	95
PID 4460 wrote to memory of 4600	4460	DllCommonsvc.exe	95
PID 4460 wrote to memory of 5064	4460	DllCommonsvc.exe	97
PID 4460 wrote to memory of 5064	4460	DllCommonsvc.exe	97

C:\Users\Admin\AppData\Local\Temp\ac27c0a6f62525fe96a24691ab05e83e.exe
"C:\Users\Admin\AppData\Local\Temp\ac27c0a6f62525fe96a24691ab05e83e.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1280
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:4192
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\providercommon\1zu9dW.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2184
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4460
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\DllCommonsvc.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3720
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\lsass.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1952
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe'
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4600
    - - C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe
        
        "C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:5064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4920

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1184

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 5 /tr "'C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4804

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 5 /tr "'C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4788

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

Download Submit
C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\Windows\Branding\Basebrd\it-IT\taskhostw.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\providercommon\1zu9dW.bat

Filesize
36B

MD5
6783c3ee07c7d151ceac57f1f9c8bed7

SHA1
17468f98f95bf504cc1f83c49e49a78526b3ea03

SHA256
8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

SHA512
c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

Download Submit
C:\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

Filesize
197B

MD5
8088241160261560a02c84025d107592

SHA1
083121f7027557570994c9fc211df61730455bb5

SHA256
2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

SHA512
20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

Download Submit
memory/1952-153-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/1952-145-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/3720-157-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/3720-155-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/4460-140-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/4460-149-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/4460-139-0x0000000000A90000-0x0000000000BA0000-memory.dmp

Filesize
1.1MB

Download
memory/4600-150-0x000002BFB7A00000-0x000002BFB7A22000-memory.dmp

Filesize
136KB

Download
memory/4600-148-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/4600-158-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/5064-154-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download
memory/5064-159-0x00007FFBFE880000-0x00007FFBFF341000-memory.dmp

Filesize
10.8MB

Download