darkcomet | c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b

General

Target

c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe
Size

300KB
MD5

cc0b280b1138859bedd6af39377526a5
SHA1

861cecd1d68a5ee192e69e5f1cf028114ec1b7af
SHA256

c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b
SHA512

b002cfc305630fca9c6af061ff032aae88ae0aaa185628808d717ce1eb0ef4802d916a9f78e8582b97e64981d7f1c0ecce4eee35df9f6c5e2d2bbcbead5d51ff
SSDEEP

6144:YRk2kQjwtxwiG9Gl9St23NZCB0lsvW8gco/LDLPOj03p2KZhE:YR49x6EmslevWQIHDOj03p2

Score

10^/10

darkcomet guest16 evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

jjb4xt3r.myftp.biz:1604

Mutex

DC_MUTEX-8JY3N3Z

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
SjbmmcfPKkjH
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

2144 msdcsc.exe
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

2428 attrib.exe
952 attrib.exe

pid	process
2144	msdcsc.exe

pid	process
2428	attrib.exe
952	attrib.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/5032-134-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/5032-136-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/5032-137-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/5032-138-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/5032-140-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/5032-149-0x0000000000400000-0x00000000004B9000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe

description	pid	process	target process
PID 4060 set thread context of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe

Drops file in Windows directory 2 IoCs

Processes:

attrib.exeattrib.exe

description	ioc	process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe	attrib.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727	attrib.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	5032	vbc.exe
Token: SeSecurityPrivilege	5032	vbc.exe
Token: SeTakeOwnershipPrivilege	5032	vbc.exe
Token: SeLoadDriverPrivilege	5032	vbc.exe
Token: SeSystemProfilePrivilege	5032	vbc.exe
Token: SeSystemtimePrivilege	5032	vbc.exe
Token: SeProfSingleProcessPrivilege	5032	vbc.exe
Token: SeIncBasePriorityPrivilege	5032	vbc.exe
Token: SeCreatePagefilePrivilege	5032	vbc.exe
Token: SeBackupPrivilege	5032	vbc.exe
Token: SeRestorePrivilege	5032	vbc.exe
Token: SeShutdownPrivilege	5032	vbc.exe
Token: SeDebugPrivilege	5032	vbc.exe
Token: SeSystemEnvironmentPrivilege	5032	vbc.exe
Token: SeChangeNotifyPrivilege	5032	vbc.exe
Token: SeRemoteShutdownPrivilege	5032	vbc.exe
Token: SeUndockPrivilege	5032	vbc.exe
Token: SeManageVolumePrivilege	5032	vbc.exe
Token: SeImpersonatePrivilege	5032	vbc.exe
Token: SeCreateGlobalPrivilege	5032	vbc.exe
Token: 33	5032	vbc.exe
Token: 34	5032	vbc.exe
Token: 35	5032	vbc.exe
Token: 36	5032	vbc.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 4060 wrote to memory of 5032	4060	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 5032 wrote to memory of 796	5032	vbc.exe	cmd.exe
PID 5032 wrote to memory of 796	5032	vbc.exe	cmd.exe
PID 5032 wrote to memory of 796	5032	vbc.exe	cmd.exe
PID 5032 wrote to memory of 4772	5032	vbc.exe	cmd.exe
PID 5032 wrote to memory of 4772	5032	vbc.exe	cmd.exe
PID 5032 wrote to memory of 4772	5032	vbc.exe	cmd.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 5032 wrote to memory of 2196	5032	vbc.exe	notepad.exe
PID 796 wrote to memory of 952	796	cmd.exe	attrib.exe
PID 796 wrote to memory of 952	796	cmd.exe	attrib.exe
PID 796 wrote to memory of 952	796	cmd.exe	attrib.exe
PID 5032 wrote to memory of 2144	5032	vbc.exe	msdcsc.exe
PID 5032 wrote to memory of 2144	5032	vbc.exe	msdcsc.exe
PID 5032 wrote to memory of 2144	5032	vbc.exe	msdcsc.exe
PID 4772 wrote to memory of 2428	4772	cmd.exe	attrib.exe
PID 4772 wrote to memory of 2428	4772	cmd.exe	attrib.exe
PID 4772 wrote to memory of 2428	4772	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

952 attrib.exe
2428 attrib.exe

pid	process
952	attrib.exe
2428	attrib.exe

C:\Users\Admin\AppData\Local\Temp\c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe
"C:\Users\Admin\AppData\Local\Temp\c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4060

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
2⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5032

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:796

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:952

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:4772

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:2428

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:2196

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:2144

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Winlogon Helper DLL

1

T1004

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Hidden Files and Directories

2

T1158

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/796-141-0x0000000000000000-mapping.dmp

Download
memory/952-144-0x0000000000000000-mapping.dmp

Download
memory/2144-145-0x0000000000000000-mapping.dmp

Download
memory/2196-143-0x0000000000000000-mapping.dmp

Download
memory/2428-147-0x0000000000000000-mapping.dmp

Download
memory/4060-139-0x0000000074F90000-0x0000000075541000-memory.dmp

Filesize
5.7MB

Download
memory/4060-132-0x0000000074F90000-0x0000000075541000-memory.dmp

Filesize
5.7MB

Download
memory/4772-142-0x0000000000000000-mapping.dmp

Download
memory/5032-138-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/5032-140-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/5032-137-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/5032-136-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/5032-134-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/5032-133-0x0000000000000000-mapping.dmp

Download
memory/5032-149-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads