darkcomet | 82df3f039af299fd82ac54b1c8e02346509f9a2c8f09cb843d9d7a6d2d842b2c

General

Target

flexabyprojectv2.exe
Size

252KB
MD5

b414dba465bb735661e18eae4e7aca89
SHA1

30c69c395ef9bc6cbcf0fbc7dc8a8f07b1b696c2
SHA256

82df3f039af299fd82ac54b1c8e02346509f9a2c8f09cb843d9d7a6d2d842b2c
SHA512

7de9df971ca0deda15a408e9f4b7c15210453b38072d5b6192ecfc35e65cfb1eb6c772ce3bc1499f82d76c20d40e6b552879c21b0856ec283192847130914d08
SSDEEP

6144:FcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:FcW7KEZlPzCy37

Score

10^/10

darkcomet sazan evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

hckexe.duckdns.org:1604

Mutex

DC_MUTEX-DY54MEJ

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
aBlcf64AC80d
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:

flexabyprojectv2.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	flexabyprojectv2.exe

Modifies security service 2 TTPs 2 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

msdcsc.exeiexplore.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	iexplore.exe

Disables RegEdit via registry modification 2 IoCs

evasion

Processes:

msdcsc.exeiexplore.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	iexplore.exe

Disables Task Manager via registry modification
evasion
Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

992 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

524 attrib.exe
1256 attrib.exe

pid	process
992	msdcsc.exe

pid	process
524	attrib.exe
1256	attrib.exe

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2028-55-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
\Windows\SysWOW64\MSDCSC\msdcsc.exe	upx
\Windows\SysWOW64\MSDCSC\msdcsc.exe	upx
C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	upx
C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	upx
behavioral1/memory/992-67-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral1/memory/2028-68-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral1/memory/992-69-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

flexabyprojectv2.exe

pid process

2028 flexabyprojectv2.exe
2028 flexabyprojectv2.exe

pid	process
2028	flexabyprojectv2.exe
2028	flexabyprojectv2.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

flexabyprojectv2.exemsdcsc.exeiexplore.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	flexabyprojectv2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	iexplore.exe

Drops file in System32 directory 3 IoCs

Processes:

flexabyprojectv2.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	flexabyprojectv2.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	flexabyprojectv2.exe
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	flexabyprojectv2.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

msdcsc.exe

description pid process target process

PID 992 set thread context of 296 992 msdcsc.exe iexplore.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 992 set thread context of 296	992	msdcsc.exe	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

flexabyprojectv2.exemsdcsc.exeiexplore.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2028	flexabyprojectv2.exe
Token: SeSecurityPrivilege	2028	flexabyprojectv2.exe
Token: SeTakeOwnershipPrivilege	2028	flexabyprojectv2.exe
Token: SeLoadDriverPrivilege	2028	flexabyprojectv2.exe
Token: SeSystemProfilePrivilege	2028	flexabyprojectv2.exe
Token: SeSystemtimePrivilege	2028	flexabyprojectv2.exe
Token: SeProfSingleProcessPrivilege	2028	flexabyprojectv2.exe
Token: SeIncBasePriorityPrivilege	2028	flexabyprojectv2.exe
Token: SeCreatePagefilePrivilege	2028	flexabyprojectv2.exe
Token: SeBackupPrivilege	2028	flexabyprojectv2.exe
Token: SeRestorePrivilege	2028	flexabyprojectv2.exe
Token: SeShutdownPrivilege	2028	flexabyprojectv2.exe
Token: SeDebugPrivilege	2028	flexabyprojectv2.exe
Token: SeSystemEnvironmentPrivilege	2028	flexabyprojectv2.exe
Token: SeChangeNotifyPrivilege	2028	flexabyprojectv2.exe
Token: SeRemoteShutdownPrivilege	2028	flexabyprojectv2.exe
Token: SeUndockPrivilege	2028	flexabyprojectv2.exe
Token: SeManageVolumePrivilege	2028	flexabyprojectv2.exe
Token: SeImpersonatePrivilege	2028	flexabyprojectv2.exe
Token: SeCreateGlobalPrivilege	2028	flexabyprojectv2.exe
Token: 33	2028	flexabyprojectv2.exe
Token: 34	2028	flexabyprojectv2.exe
Token: 35	2028	flexabyprojectv2.exe
Token: SeIncreaseQuotaPrivilege	992	msdcsc.exe
Token: SeSecurityPrivilege	992	msdcsc.exe
Token: SeTakeOwnershipPrivilege	992	msdcsc.exe
Token: SeLoadDriverPrivilege	992	msdcsc.exe
Token: SeSystemProfilePrivilege	992	msdcsc.exe
Token: SeSystemtimePrivilege	992	msdcsc.exe
Token: SeProfSingleProcessPrivilege	992	msdcsc.exe
Token: SeIncBasePriorityPrivilege	992	msdcsc.exe
Token: SeCreatePagefilePrivilege	992	msdcsc.exe
Token: SeBackupPrivilege	992	msdcsc.exe
Token: SeRestorePrivilege	992	msdcsc.exe
Token: SeShutdownPrivilege	992	msdcsc.exe
Token: SeDebugPrivilege	992	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	992	msdcsc.exe
Token: SeChangeNotifyPrivilege	992	msdcsc.exe
Token: SeRemoteShutdownPrivilege	992	msdcsc.exe
Token: SeUndockPrivilege	992	msdcsc.exe
Token: SeManageVolumePrivilege	992	msdcsc.exe
Token: SeImpersonatePrivilege	992	msdcsc.exe
Token: SeCreateGlobalPrivilege	992	msdcsc.exe
Token: 33	992	msdcsc.exe
Token: 34	992	msdcsc.exe
Token: 35	992	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	296	iexplore.exe
Token: SeSecurityPrivilege	296	iexplore.exe
Token: SeTakeOwnershipPrivilege	296	iexplore.exe
Token: SeLoadDriverPrivilege	296	iexplore.exe
Token: SeSystemProfilePrivilege	296	iexplore.exe
Token: SeSystemtimePrivilege	296	iexplore.exe
Token: SeProfSingleProcessPrivilege	296	iexplore.exe
Token: SeIncBasePriorityPrivilege	296	iexplore.exe
Token: SeCreatePagefilePrivilege	296	iexplore.exe
Token: SeBackupPrivilege	296	iexplore.exe
Token: SeRestorePrivilege	296	iexplore.exe
Token: SeShutdownPrivilege	296	iexplore.exe
Token: SeDebugPrivilege	296	iexplore.exe
Token: SeSystemEnvironmentPrivilege	296	iexplore.exe
Token: SeChangeNotifyPrivilege	296	iexplore.exe
Token: SeRemoteShutdownPrivilege	296	iexplore.exe
Token: SeUndockPrivilege	296	iexplore.exe
Token: SeManageVolumePrivilege	296	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

296 iexplore.exe

pid	process
296	iexplore.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

flexabyprojectv2.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 2028 wrote to memory of 764	2028	flexabyprojectv2.exe	cmd.exe
PID 2028 wrote to memory of 764	2028	flexabyprojectv2.exe	cmd.exe
PID 2028 wrote to memory of 764	2028	flexabyprojectv2.exe	cmd.exe
PID 2028 wrote to memory of 764	2028	flexabyprojectv2.exe	cmd.exe
PID 2028 wrote to memory of 1912	2028	flexabyprojectv2.exe	cmd.exe
PID 2028 wrote to memory of 1912	2028	flexabyprojectv2.exe	cmd.exe
PID 2028 wrote to memory of 1912	2028	flexabyprojectv2.exe	cmd.exe
PID 2028 wrote to memory of 1912	2028	flexabyprojectv2.exe	cmd.exe
PID 764 wrote to memory of 524	764	cmd.exe	attrib.exe
PID 764 wrote to memory of 524	764	cmd.exe	attrib.exe
PID 764 wrote to memory of 524	764	cmd.exe	attrib.exe
PID 764 wrote to memory of 524	764	cmd.exe	attrib.exe
PID 1912 wrote to memory of 1256	1912	cmd.exe	attrib.exe
PID 1912 wrote to memory of 1256	1912	cmd.exe	attrib.exe
PID 1912 wrote to memory of 1256	1912	cmd.exe	attrib.exe
PID 1912 wrote to memory of 1256	1912	cmd.exe	attrib.exe
PID 2028 wrote to memory of 992	2028	flexabyprojectv2.exe	msdcsc.exe
PID 2028 wrote to memory of 992	2028	flexabyprojectv2.exe	msdcsc.exe
PID 2028 wrote to memory of 992	2028	flexabyprojectv2.exe	msdcsc.exe
PID 2028 wrote to memory of 992	2028	flexabyprojectv2.exe	msdcsc.exe
PID 992 wrote to memory of 296	992	msdcsc.exe	iexplore.exe
PID 992 wrote to memory of 296	992	msdcsc.exe	iexplore.exe
PID 992 wrote to memory of 296	992	msdcsc.exe	iexplore.exe
PID 992 wrote to memory of 296	992	msdcsc.exe	iexplore.exe
PID 992 wrote to memory of 296	992	msdcsc.exe	iexplore.exe
PID 992 wrote to memory of 296	992	msdcsc.exe	iexplore.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

msdcsc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	msdcsc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

524 attrib.exe
1256 attrib.exe

pid	process
524	attrib.exe
1256	attrib.exe

C:\Users\Admin\AppData\Local\Temp\flexabyprojectv2.exe
"C:\Users\Admin\AppData\Local\Temp\flexabyprojectv2.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\flexabyprojectv2.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:764

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\flexabyprojectv2.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:524

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:1912

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:1256

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
"C:\Windows\system32\MSDCSC\msdcsc.exe"
2⤵
- Modifies security service
- Disables RegEdit via registry modification
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:992

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
3⤵
- Modifies security service
- Disables RegEdit via registry modification
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:296

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Modify Existing Service

1

T1031

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

4

T1112

Hidden Files and Directories

2

T1158

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
Filesize
252KB

MD5
b414dba465bb735661e18eae4e7aca89

SHA1
30c69c395ef9bc6cbcf0fbc7dc8a8f07b1b696c2

SHA256
82df3f039af299fd82ac54b1c8e02346509f9a2c8f09cb843d9d7a6d2d842b2c

SHA512
7de9df971ca0deda15a408e9f4b7c15210453b38072d5b6192ecfc35e65cfb1eb6c772ce3bc1499f82d76c20d40e6b552879c21b0856ec283192847130914d08

Download Submit
C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
Filesize
252KB

MD5
b414dba465bb735661e18eae4e7aca89

SHA1
30c69c395ef9bc6cbcf0fbc7dc8a8f07b1b696c2

SHA256
82df3f039af299fd82ac54b1c8e02346509f9a2c8f09cb843d9d7a6d2d842b2c

SHA512
7de9df971ca0deda15a408e9f4b7c15210453b38072d5b6192ecfc35e65cfb1eb6c772ce3bc1499f82d76c20d40e6b552879c21b0856ec283192847130914d08

Download Submit
\Windows\SysWOW64\MSDCSC\msdcsc.exe
Filesize
252KB

MD5
b414dba465bb735661e18eae4e7aca89

SHA1
30c69c395ef9bc6cbcf0fbc7dc8a8f07b1b696c2

SHA256
82df3f039af299fd82ac54b1c8e02346509f9a2c8f09cb843d9d7a6d2d842b2c

SHA512
7de9df971ca0deda15a408e9f4b7c15210453b38072d5b6192ecfc35e65cfb1eb6c772ce3bc1499f82d76c20d40e6b552879c21b0856ec283192847130914d08

Download Submit
\Windows\SysWOW64\MSDCSC\msdcsc.exe
Filesize
252KB

MD5
b414dba465bb735661e18eae4e7aca89

SHA1
30c69c395ef9bc6cbcf0fbc7dc8a8f07b1b696c2

SHA256
82df3f039af299fd82ac54b1c8e02346509f9a2c8f09cb843d9d7a6d2d842b2c

SHA512
7de9df971ca0deda15a408e9f4b7c15210453b38072d5b6192ecfc35e65cfb1eb6c772ce3bc1499f82d76c20d40e6b552879c21b0856ec283192847130914d08

Download Submit
memory/524-58-0x0000000000000000-mapping.dmp

Download
memory/764-56-0x0000000000000000-mapping.dmp

Download
memory/992-62-0x0000000000000000-mapping.dmp

Download
memory/992-67-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/992-69-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1256-59-0x0000000000000000-mapping.dmp

Download
memory/1912-57-0x0000000000000000-mapping.dmp

Download
memory/2028-54-0x0000000076651000-0x0000000076653000-memory.dmp

Filesize
8KB

Download
memory/2028-55-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2028-66-0x0000000003A70000-0x0000000003B27000-memory.dmp

Filesize
732KB

Download
memory/2028-68-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads