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-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\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

4688 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

4496 attrib.exe
3068 attrib.exe

pid	process
4688	msdcsc.exe

pid	process
4496	attrib.exe
3068	attrib.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3088-132-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	upx
C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	upx
behavioral2/memory/4688-140-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/4688-141-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3088-142-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

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

Processes:

flexabyprojectv2.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	flexabyprojectv2.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msdcsc.exeiexplore.exeflexabyprojectv2.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	flexabyprojectv2.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 4688 set thread context of 2000 4688 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 4688 set thread context of 2000	4688	msdcsc.exe	iexplore.exe

Modifies registry class 1 IoCs

Processes:

flexabyprojectv2.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	flexabyprojectv2.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

flexabyprojectv2.exemsdcsc.exeiexplore.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3088	flexabyprojectv2.exe
Token: SeSecurityPrivilege	3088	flexabyprojectv2.exe
Token: SeTakeOwnershipPrivilege	3088	flexabyprojectv2.exe
Token: SeLoadDriverPrivilege	3088	flexabyprojectv2.exe
Token: SeSystemProfilePrivilege	3088	flexabyprojectv2.exe
Token: SeSystemtimePrivilege	3088	flexabyprojectv2.exe
Token: SeProfSingleProcessPrivilege	3088	flexabyprojectv2.exe
Token: SeIncBasePriorityPrivilege	3088	flexabyprojectv2.exe
Token: SeCreatePagefilePrivilege	3088	flexabyprojectv2.exe
Token: SeBackupPrivilege	3088	flexabyprojectv2.exe
Token: SeRestorePrivilege	3088	flexabyprojectv2.exe
Token: SeShutdownPrivilege	3088	flexabyprojectv2.exe
Token: SeDebugPrivilege	3088	flexabyprojectv2.exe
Token: SeSystemEnvironmentPrivilege	3088	flexabyprojectv2.exe
Token: SeChangeNotifyPrivilege	3088	flexabyprojectv2.exe
Token: SeRemoteShutdownPrivilege	3088	flexabyprojectv2.exe
Token: SeUndockPrivilege	3088	flexabyprojectv2.exe
Token: SeManageVolumePrivilege	3088	flexabyprojectv2.exe
Token: SeImpersonatePrivilege	3088	flexabyprojectv2.exe
Token: SeCreateGlobalPrivilege	3088	flexabyprojectv2.exe
Token: 33	3088	flexabyprojectv2.exe
Token: 34	3088	flexabyprojectv2.exe
Token: 35	3088	flexabyprojectv2.exe
Token: 36	3088	flexabyprojectv2.exe
Token: SeIncreaseQuotaPrivilege	4688	msdcsc.exe
Token: SeSecurityPrivilege	4688	msdcsc.exe
Token: SeTakeOwnershipPrivilege	4688	msdcsc.exe
Token: SeLoadDriverPrivilege	4688	msdcsc.exe
Token: SeSystemProfilePrivilege	4688	msdcsc.exe
Token: SeSystemtimePrivilege	4688	msdcsc.exe
Token: SeProfSingleProcessPrivilege	4688	msdcsc.exe
Token: SeIncBasePriorityPrivilege	4688	msdcsc.exe
Token: SeCreatePagefilePrivilege	4688	msdcsc.exe
Token: SeBackupPrivilege	4688	msdcsc.exe
Token: SeRestorePrivilege	4688	msdcsc.exe
Token: SeShutdownPrivilege	4688	msdcsc.exe
Token: SeDebugPrivilege	4688	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	4688	msdcsc.exe
Token: SeChangeNotifyPrivilege	4688	msdcsc.exe
Token: SeRemoteShutdownPrivilege	4688	msdcsc.exe
Token: SeUndockPrivilege	4688	msdcsc.exe
Token: SeManageVolumePrivilege	4688	msdcsc.exe
Token: SeImpersonatePrivilege	4688	msdcsc.exe
Token: SeCreateGlobalPrivilege	4688	msdcsc.exe
Token: 33	4688	msdcsc.exe
Token: 34	4688	msdcsc.exe
Token: 35	4688	msdcsc.exe
Token: 36	4688	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	2000	iexplore.exe
Token: SeSecurityPrivilege	2000	iexplore.exe
Token: SeTakeOwnershipPrivilege	2000	iexplore.exe
Token: SeLoadDriverPrivilege	2000	iexplore.exe
Token: SeSystemProfilePrivilege	2000	iexplore.exe
Token: SeSystemtimePrivilege	2000	iexplore.exe
Token: SeProfSingleProcessPrivilege	2000	iexplore.exe
Token: SeIncBasePriorityPrivilege	2000	iexplore.exe
Token: SeCreatePagefilePrivilege	2000	iexplore.exe
Token: SeBackupPrivilege	2000	iexplore.exe
Token: SeRestorePrivilege	2000	iexplore.exe
Token: SeShutdownPrivilege	2000	iexplore.exe
Token: SeDebugPrivilege	2000	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2000	iexplore.exe
Token: SeChangeNotifyPrivilege	2000	iexplore.exe
Token: SeRemoteShutdownPrivilege	2000	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

2000 iexplore.exe

pid	process
2000	iexplore.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

flexabyprojectv2.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 3088 wrote to memory of 2012	3088	flexabyprojectv2.exe	cmd.exe
PID 3088 wrote to memory of 2012	3088	flexabyprojectv2.exe	cmd.exe
PID 3088 wrote to memory of 2012	3088	flexabyprojectv2.exe	cmd.exe
PID 3088 wrote to memory of 448	3088	flexabyprojectv2.exe	cmd.exe
PID 3088 wrote to memory of 448	3088	flexabyprojectv2.exe	cmd.exe
PID 3088 wrote to memory of 448	3088	flexabyprojectv2.exe	cmd.exe
PID 2012 wrote to memory of 4496	2012	cmd.exe	attrib.exe
PID 2012 wrote to memory of 4496	2012	cmd.exe	attrib.exe
PID 2012 wrote to memory of 4496	2012	cmd.exe	attrib.exe
PID 448 wrote to memory of 3068	448	cmd.exe	attrib.exe
PID 448 wrote to memory of 3068	448	cmd.exe	attrib.exe
PID 448 wrote to memory of 3068	448	cmd.exe	attrib.exe
PID 3088 wrote to memory of 4688	3088	flexabyprojectv2.exe	msdcsc.exe
PID 3088 wrote to memory of 4688	3088	flexabyprojectv2.exe	msdcsc.exe
PID 3088 wrote to memory of 4688	3088	flexabyprojectv2.exe	msdcsc.exe
PID 4688 wrote to memory of 2000	4688	msdcsc.exe	iexplore.exe
PID 4688 wrote to memory of 2000	4688	msdcsc.exe	iexplore.exe
PID 4688 wrote to memory of 2000	4688	msdcsc.exe	iexplore.exe
PID 4688 wrote to memory of 2000	4688	msdcsc.exe	iexplore.exe
PID 4688 wrote to memory of 2000	4688	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

4496 attrib.exe
3068 attrib.exe

pid	process
4496	attrib.exe
3068	attrib.exe

C:\Users\Admin\AppData\Local\Temp\flexabyprojectv2.exe
"C:\Users\Admin\AppData\Local\Temp\flexabyprojectv2.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3088

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:2012

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:4496

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:448

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:3068

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:4688

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:2000

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

Query Registry

1

T1012

System Information Discovery

2

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
memory/448-134-0x0000000000000000-mapping.dmp

Download
memory/2012-133-0x0000000000000000-mapping.dmp

Download
memory/3068-136-0x0000000000000000-mapping.dmp

Download
memory/3088-132-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3088-142-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4496-135-0x0000000000000000-mapping.dmp

Download
memory/4688-137-0x0000000000000000-mapping.dmp

Download
memory/4688-140-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4688-141-0x0000000000400000-0x00000000004B7000-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