dcrat | 2dfeb67e47b8cf7b46385dc64ff9f48d88ca15699d6615151b2ba668bccf251b

Analysis

max time kernel
15s
max time network
18s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-12-2024 16:25

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General

Target

Medal.exe
Size

1.8MB
MD5

e27a4488cb35703f406fcf3a038a86c4
SHA1

926513f3ccca7cc4a86f281670cc9be1fdd4c613
SHA256

2dfeb67e47b8cf7b46385dc64ff9f48d88ca15699d6615151b2ba668bccf251b
SHA512

9fb695f3300f1b0a0edbc5413181230cf0d5eefcd09310e12f3e7b8b969332ebcb639a3944e4496e7b55b9e929823edb86ff21d59f92ed72fa5de7717aba9793
SSDEEP

49152:nehuClT3DpSX+KfJunl9CJ0ouJfK2CKaKWdIuqK:nehTLFFKonPJapI

Score

10^/10

dcrat discovery execution 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

Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4728	powershell.exe
1672	powershell.exe
4188	powershell.exe
4132	powershell.exe
3068	powershell.exe
684	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	Medal.exe

Executes dropped EXE 1 IoCs

pid	Process
2060	Idle.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	\??\c:\Windows\System32\-63gkj.exe	csc.exe
File created	\??\c:\Windows\System32\CSCA64FFA00AB9F4940B7D5FDEC584BB9A.TMP	csc.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\ModemLogs\RuntimeBroker.exe	Medal.exe
File created	C:\Windows\ModemLogs\9e8d7a4ca61bd9	Medal.exe

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

System Information Discovery
T1082

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

pid	Process
2660	PING.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	Medal.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2660	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1120	Medal.exe
1672	powershell.exe
4188	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1120	Medal.exe
Token: SeDebugPrivilege	1672	powershell.exe
Token: SeDebugPrivilege	4188	powershell.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	4728	powershell.exe
Token: SeDebugPrivilege	684	powershell.exe
Token: SeDebugPrivilege	4132	powershell.exe
Token: SeDebugPrivilege	2060	Idle.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 1076	1120	Medal.exe	85
PID 1120 wrote to memory of 1076	1120	Medal.exe	85
PID 1076 wrote to memory of 464	1076	csc.exe	87
PID 1076 wrote to memory of 464	1076	csc.exe	87
PID 1120 wrote to memory of 4132	1120	Medal.exe	88
PID 1120 wrote to memory of 4132	1120	Medal.exe	88
PID 1120 wrote to memory of 4188	1120	Medal.exe	89
PID 1120 wrote to memory of 4188	1120	Medal.exe	89
PID 1120 wrote to memory of 1672	1120	Medal.exe	90
PID 1120 wrote to memory of 1672	1120	Medal.exe	90
PID 1120 wrote to memory of 4728	1120	Medal.exe	91
PID 1120 wrote to memory of 4728	1120	Medal.exe	91
PID 1120 wrote to memory of 684	1120	Medal.exe	92
PID 1120 wrote to memory of 684	1120	Medal.exe	92
PID 1120 wrote to memory of 3068	1120	Medal.exe	93
PID 1120 wrote to memory of 3068	1120	Medal.exe	93
PID 1120 wrote to memory of 4676	1120	Medal.exe	100
PID 1120 wrote to memory of 4676	1120	Medal.exe	100
PID 4676 wrote to memory of 5016	4676	cmd.exe	102
PID 4676 wrote to memory of 5016	4676	cmd.exe	102
PID 4676 wrote to memory of 2660	4676	cmd.exe	103
PID 4676 wrote to memory of 2660	4676	cmd.exe	103
PID 4676 wrote to memory of 2060	4676	cmd.exe	106
PID 4676 wrote to memory of 2060	4676	cmd.exe	106

C:\Users\Admin\AppData\Local\Temp\Medal.exe
"C:\Users\Admin\AppData\Local\Temp\Medal.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\tudz1onn\tudz1onn.cmdline"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1076
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
    C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESD84F.tmp" "c:\Windows\System32\CSCA64FFA00AB9F4940B7D5FDEC584BB9A.TMP"
    3⤵
    PID:464
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\ModemLogs\RuntimeBroker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of AdjustPrivilegeToken
  PID:4132
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\smss.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4188
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Public\Downloads\dllhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1672
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\spoolsv.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of AdjustPrivilegeToken
  PID:4728
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\WindowsRE\Idle.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of AdjustPrivilegeToken
  PID:684
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Medal.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of AdjustPrivilegeToken
  PID:3068
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\jfzxZNfU5I.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4676
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:5016
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2660
- - C:\Recovery\WindowsRE\Idle.exe
    "C:\Recovery\WindowsRE\Idle.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

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
3a6bad9528f8e23fb5c77fbd81fa28e8

SHA1
f127317c3bc6407f536c0f0600dcbcf1aabfba36

SHA256
986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

SHA512
846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

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:\Users\Admin\AppData\Local\Temp\RESD84F.tmp

Filesize
1KB

MD5
8c580a73c382b64ad147da2023a00bd3

SHA1
d0a973831b0b08079095b4d2dede1d603ef6ee23

SHA256
20758020a620fa26a9ee853ecd0ec2eb6ceff9c06ab5a244ce0b5f06f0467505

SHA512
3fef512f1eb791e8a578d1bdbe9cf28a4347315d3af40d05ede7145b36e53be85ae534f2ebb74e1752bc95db0135ab6fbdcaa4f333ac9a5c0173ef73cdc8e995

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_31x4vkqi.rx1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\jfzxZNfU5I.bat

Filesize
158B

MD5
492821ab6b5febf126a00ec10d23ed9a

SHA1
b51e6215b657125d023842b65d424d754e1961b2

SHA256
877dfcd3666373062d4bde370ac03e12daa639c0785f8ec200d106d889095000

SHA512
ff2a2152a306b7949cfc0dd0ac8882083a265931d7f0b2a6f8e27a84b857090e100422fa0c161f225da33436e4e29e898386ca8863f60697c48d9c9afa3afe43

Download Submit
C:\Windows\ModemLogs\RuntimeBroker.exe

Filesize
1.8MB

MD5
e27a4488cb35703f406fcf3a038a86c4

SHA1
926513f3ccca7cc4a86f281670cc9be1fdd4c613

SHA256
2dfeb67e47b8cf7b46385dc64ff9f48d88ca15699d6615151b2ba668bccf251b

SHA512
9fb695f3300f1b0a0edbc5413181230cf0d5eefcd09310e12f3e7b8b969332ebcb639a3944e4496e7b55b9e929823edb86ff21d59f92ed72fa5de7717aba9793

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\tudz1onn\tudz1onn.0.cs

Filesize
370B

MD5
a13809ae072536d6911cbe249099b599

SHA1
f526cc112248ef93010f23fc1c7af8e9dfb0c60d

SHA256
228ecc554508f0f02bf4f7adddd1fc0cb7c5bfc885d43e15d6035d05961cb555

SHA512
abd0fb8d64182082fbe932b8c7e932d272878005e5a006be25004b837c656b4763e77c62123395992d78180ea0138549049178fac084851d80673fa386adcd43

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\tudz1onn\tudz1onn.cmdline

Filesize
235B

MD5
7bc301bf4b5c52fd8e610e73af1054c2

SHA1
c2e60ed6629faf8a583a69ed4123064c1fa01103

SHA256
5a58484df2e2b93ae8bf33d936b800d1a3ddf90d35375d3d9c2412e06e8bbe0c

SHA512
fa05d01d54e22d093d5f91a077ad73f111ba1031187f7525f65c5a9a4ba2a017093b75b7c05ce5584b31fe768ad55e256d7a163334a00ce746bbd8e0d1499e59

Download Submit
\??\c:\Windows\System32\CSCA64FFA00AB9F4940B7D5FDEC584BB9A.TMP

Filesize
1KB

MD5
82a7b8ef3bc275711e3b27c6df93c7ff

SHA1
bdac909f26475c94c74145576bcf22adb0f8203c

SHA256
582921e5e6617cb736006c46c9c8576d8fdefb8763469bdbf305d52d298f6124

SHA512
f2100bca60280f6ad93f40254d6fe69bd9917a44973516874aa54c28042796503daac5c51869924f5ecd17615f461dda6441f479e1201c44ad07f5a7728af248

Download Submit
memory/1120-8-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-45-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-17-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-14-0x0000000002670000-0x0000000002688000-memory.dmp

Filesize
96KB

Download
memory/1120-12-0x000000001B580000-0x000000001B5D0000-memory.dmp

Filesize
320KB

Download
memory/1120-11-0x0000000002650000-0x000000000266C000-memory.dmp

Filesize
112KB

Download
memory/1120-9-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-0-0x00007FF840FE3000-0x00007FF840FE5000-memory.dmp

Filesize
8KB

Download
memory/1120-44-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-16-0x0000000002610000-0x000000000261C000-memory.dmp

Filesize
48KB

Download
memory/1120-46-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-49-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-1-0x0000000000220000-0x00000000003FA000-memory.dmp

Filesize
1.9MB

Download
memory/1120-6-0x0000000002600000-0x000000000260E000-memory.dmp

Filesize
56KB

Download
memory/1120-7-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-4-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-3-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-2-0x00007FF840FE0000-0x00007FF841AA1000-memory.dmp

Filesize
10.8MB

Download
memory/1672-55-0x0000015D742D0000-0x0000015D742F2000-memory.dmp

Filesize
136KB

Download