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

1408 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

1068 attrib.exe
544 attrib.exe

pid	process
1408	msdcsc.exe

pid	process
1068	attrib.exe
544	attrib.exe

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1128-56-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral1/memory/1128-58-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral1/memory/1128-60-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral1/memory/1128-62-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral1/memory/1128-64-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral1/memory/1128-66-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral1/memory/1128-76-0x0000000000400000-0x00000000004B9000-memory.dmp	upx

Loads dropped DLL 1 IoCs

Processes:

vbc.exe

pid process

1128 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1128	vbc.exe

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-1-5-21-1214520366-621468234-4062160515-1000\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 472 set thread context of 1128 472 c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe vbc.exe

description	pid	process	target process
PID 472 set thread context of 1128	472	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	attrib.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe	attrib.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1128	vbc.exe
Token: SeSecurityPrivilege	1128	vbc.exe
Token: SeTakeOwnershipPrivilege	1128	vbc.exe
Token: SeLoadDriverPrivilege	1128	vbc.exe
Token: SeSystemProfilePrivilege	1128	vbc.exe
Token: SeSystemtimePrivilege	1128	vbc.exe
Token: SeProfSingleProcessPrivilege	1128	vbc.exe
Token: SeIncBasePriorityPrivilege	1128	vbc.exe
Token: SeCreatePagefilePrivilege	1128	vbc.exe
Token: SeBackupPrivilege	1128	vbc.exe
Token: SeRestorePrivilege	1128	vbc.exe
Token: SeShutdownPrivilege	1128	vbc.exe
Token: SeDebugPrivilege	1128	vbc.exe
Token: SeSystemEnvironmentPrivilege	1128	vbc.exe
Token: SeChangeNotifyPrivilege	1128	vbc.exe
Token: SeRemoteShutdownPrivilege	1128	vbc.exe
Token: SeUndockPrivilege	1128	vbc.exe
Token: SeManageVolumePrivilege	1128	vbc.exe
Token: SeImpersonatePrivilege	1128	vbc.exe
Token: SeCreateGlobalPrivilege	1128	vbc.exe
Token: 33	1128	vbc.exe
Token: 34	1128	vbc.exe
Token: 35	1128	vbc.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 472 wrote to memory of 1128	472	c4dab5471ab7c23e71f8e5796d55c8bf2d7c3a4e8ebba7637d47321aca764c5b.exe	vbc.exe
PID 1128 wrote to memory of 900	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 900	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 900	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 900	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 1720	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 1720	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 1720	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 1720	1128	vbc.exe	cmd.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 1128 wrote to memory of 2004	1128	vbc.exe	notepad.exe
PID 900 wrote to memory of 544	900	cmd.exe	attrib.exe
PID 900 wrote to memory of 544	900	cmd.exe	attrib.exe
PID 900 wrote to memory of 544	900	cmd.exe	attrib.exe
PID 900 wrote to memory of 544	900	cmd.exe	attrib.exe
PID 1720 wrote to memory of 1068	1720	cmd.exe	attrib.exe
PID 1720 wrote to memory of 1068	1720	cmd.exe	attrib.exe
PID 1720 wrote to memory of 1068	1720	cmd.exe	attrib.exe
PID 1720 wrote to memory of 1068	1720	cmd.exe	attrib.exe
PID 1128 wrote to memory of 1408	1128	vbc.exe	msdcsc.exe
PID 1128 wrote to memory of 1408	1128	vbc.exe	msdcsc.exe
PID 1128 wrote to memory of 1408	1128	vbc.exe	msdcsc.exe
PID 1128 wrote to memory of 1408	1128	vbc.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

544 attrib.exe
1068 attrib.exe

pid	process
544	attrib.exe
1068	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:472

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
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1128

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:900

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:544

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:1720

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:1068

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:2004

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:1408

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
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

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

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

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

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/472-65-0x0000000074000000-0x00000000745AB000-memory.dmp

Filesize
5.7MB

Download
memory/472-54-0x0000000074DA1000-0x0000000074DA3000-memory.dmp

Filesize
8KB

Download
memory/544-71-0x0000000000000000-mapping.dmp

Download
memory/900-67-0x0000000000000000-mapping.dmp

Download
memory/1068-72-0x0000000000000000-mapping.dmp

Download
memory/1128-61-0x00000000004B6A00-mapping.dmp

Download
memory/1128-66-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1128-64-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1128-62-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1128-60-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1128-58-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1128-56-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1128-76-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1128-55-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1408-74-0x0000000000000000-mapping.dmp

Download
memory/1720-68-0x0000000000000000-mapping.dmp

Download
memory/2004-69-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads