darkcomet | b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2

Analysis

max time kernel
161s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20220310-en
submitted
11-03-2022 22:09

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General

Target

b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe
Size

3.8MB
MD5

a746174d2d98f16338ecbf24d6891364
SHA1

a2fdd1fa75b3119057596606fa214f7c9939f250
SHA256

b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2
SHA512

f52044c3fd9e92c0694212f3427145e91579d3d737c5f5fc3d4bda32e99a1e206b03eaa7613fca22c7214f3f5c5ee5bf980847945c636f0643a5d94573281bb5

Score

10^/10

darkcomet isrstealer opfer collection persistence rat spyware stealer suricata trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Opfer

panzaknacka.hopto.org:1337

Mutex

DC_MUTEX-ENLYG18

Attributes

InstallPath
MSDCSC\sysdate.exe
gencode
9uX0u38l6Y1n
install
true
offline_keylogger
true
password
l0rn
persistence
false
reg_key
sysdate.exe

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer Payload 6 IoCs

resource	yara_rule
behavioral2/files/0x000400000002065a-138.dat	family_isrstealer
behavioral2/files/0x000400000002065a-139.dat	family_isrstealer
behavioral2/files/0x000b0000000205a0-141.dat	family_isrstealer
behavioral2/files/0x000b0000000205a0-140.dat	family_isrstealer
behavioral2/files/0x000b0000000205a0-147.dat	family_isrstealer
behavioral2/files/0x000b0000000205a0-157.dat	family_isrstealer

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\sysdate.exe"	WINDOWS RUNNER.EXE

suricata: ET MALWARE ISRStealer Checkin
suricata: ET MALWARE ISRStealer Checkin
suricata

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4164-160-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral2/memory/4164-160-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

Executes dropped EXE 7 IoCs

pid	Process
1912	abc.exe
4600	beta.exe
3216	111.EXE
1200	WINDOWS RUNNER.EXE
1512	111.EXE
4840	sysdate.exe
4164	111.EXE

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0003000000020672-135.dat	upx
behavioral2/files/0x0003000000020672-136.dat	upx
behavioral2/memory/1512-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1512-149-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1512-150-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4164-156-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4164-159-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4164-160-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Checks computer location settings 2 TTPs 2 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-1-5-21-2403053463-4052593947-3703345493-1000\Control Panel\International\Geo\Nation	WINDOWS RUNNER.EXE
Key value queried	\REGISTRY\USER\S-1-5-21-2403053463-4052593947-3703345493-1000\Control Panel\International\Geo\Nation	beta.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2403053463-4052593947-3703345493-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	111.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2403053463-4052593947-3703345493-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysdate.exe = "C:\\Windows\\system32\\MSDCSC\\sysdate.exe"	WINDOWS RUNNER.EXE

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	WINDOWS RUNNER.EXE
File created	C:\Windows\SysWOW64\MSDCSC\sysdate.exe	WINDOWS RUNNER.EXE
File opened for modification	C:\Windows\SysWOW64\MSDCSC\sysdate.exe	WINDOWS RUNNER.EXE

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3216 set thread context of 1512	3216	111.EXE	93
PID 3216 set thread context of 4164	3216	111.EXE	97

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeSecurityPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeTakeOwnershipPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeLoadDriverPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeSystemProfilePrivilege	1200	WINDOWS RUNNER.EXE
Token: SeSystemtimePrivilege	1200	WINDOWS RUNNER.EXE
Token: SeProfSingleProcessPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeIncBasePriorityPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeCreatePagefilePrivilege	1200	WINDOWS RUNNER.EXE
Token: SeBackupPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeRestorePrivilege	1200	WINDOWS RUNNER.EXE
Token: SeShutdownPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeDebugPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeSystemEnvironmentPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeChangeNotifyPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeRemoteShutdownPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeUndockPrivilege	1200	WINDOWS RUNNER.EXE
Token: SeManageVolumePrivilege	1200	WINDOWS RUNNER.EXE
Token: SeImpersonatePrivilege	1200	WINDOWS RUNNER.EXE
Token: SeCreateGlobalPrivilege	1200	WINDOWS RUNNER.EXE
Token: 33	1200	WINDOWS RUNNER.EXE
Token: 34	1200	WINDOWS RUNNER.EXE
Token: 35	1200	WINDOWS RUNNER.EXE
Token: 36	1200	WINDOWS RUNNER.EXE
Token: SeIncreaseQuotaPrivilege	4840	sysdate.exe
Token: SeSecurityPrivilege	4840	sysdate.exe
Token: SeTakeOwnershipPrivilege	4840	sysdate.exe
Token: SeLoadDriverPrivilege	4840	sysdate.exe
Token: SeSystemProfilePrivilege	4840	sysdate.exe
Token: SeSystemtimePrivilege	4840	sysdate.exe
Token: SeProfSingleProcessPrivilege	4840	sysdate.exe
Token: SeIncBasePriorityPrivilege	4840	sysdate.exe
Token: SeCreatePagefilePrivilege	4840	sysdate.exe
Token: SeBackupPrivilege	4840	sysdate.exe
Token: SeRestorePrivilege	4840	sysdate.exe
Token: SeShutdownPrivilege	4840	sysdate.exe
Token: SeDebugPrivilege	4840	sysdate.exe
Token: SeSystemEnvironmentPrivilege	4840	sysdate.exe
Token: SeChangeNotifyPrivilege	4840	sysdate.exe
Token: SeRemoteShutdownPrivilege	4840	sysdate.exe
Token: SeUndockPrivilege	4840	sysdate.exe
Token: SeManageVolumePrivilege	4840	sysdate.exe
Token: SeImpersonatePrivilege	4840	sysdate.exe
Token: SeCreateGlobalPrivilege	4840	sysdate.exe
Token: 33	4840	sysdate.exe
Token: 34	4840	sysdate.exe
Token: 35	4840	sysdate.exe
Token: 36	4840	sysdate.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3216	111.EXE
4840	sysdate.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 3460 wrote to memory of 460	3460	b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe	83
PID 3460 wrote to memory of 460	3460	b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe	83
PID 3460 wrote to memory of 460	3460	b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe	83
PID 460 wrote to memory of 1912	460	cmd.exe	84
PID 460 wrote to memory of 1912	460	cmd.exe	84
PID 460 wrote to memory of 1912	460	cmd.exe	84
PID 1912 wrote to memory of 4904	1912	abc.exe	86
PID 1912 wrote to memory of 4904	1912	abc.exe	86
PID 1912 wrote to memory of 4904	1912	abc.exe	86
PID 4904 wrote to memory of 4600	4904	cmd.exe	87
PID 4904 wrote to memory of 4600	4904	cmd.exe	87
PID 4904 wrote to memory of 4600	4904	cmd.exe	87
PID 4600 wrote to memory of 3216	4600	beta.exe	91
PID 4600 wrote to memory of 3216	4600	beta.exe	91
PID 4600 wrote to memory of 3216	4600	beta.exe	91
PID 4600 wrote to memory of 1200	4600	beta.exe	92
PID 4600 wrote to memory of 1200	4600	beta.exe	92
PID 4600 wrote to memory of 1200	4600	beta.exe	92
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 3216 wrote to memory of 1512	3216	111.EXE	93
PID 1200 wrote to memory of 4840	1200	WINDOWS RUNNER.EXE	94
PID 1200 wrote to memory of 4840	1200	WINDOWS RUNNER.EXE	94
PID 1200 wrote to memory of 4840	1200	WINDOWS RUNNER.EXE	94
PID 3216 wrote to memory of 4164	3216	111.EXE	97
PID 3216 wrote to memory of 4164	3216	111.EXE	97
PID 3216 wrote to memory of 4164	3216	111.EXE	97
PID 3216 wrote to memory of 4164	3216	111.EXE	97
PID 3216 wrote to memory of 4164	3216	111.EXE	97
PID 3216 wrote to memory of 4164	3216	111.EXE	97
PID 3216 wrote to memory of 4164	3216	111.EXE	97
PID 3216 wrote to memory of 4164	3216	111.EXE	97

C:\Users\Admin\AppData\Local\Temp\b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe
"C:\Users\Admin\AppData\Local\Temp\b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3460
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\63F7.tmp\abc2.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:460
- - C:\Users\Admin\AppData\Local\Temp\abc.exe
    abc.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:1912
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\6D4E.tmp\abc.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4904
    - - C:\Users\Admin\AppData\Local\Temp\beta.exe
        
        beta.exe
        5⤵
        Executes dropped EXE
        Checks computer location settings
        Suspicious use of WriteProcessMemory
        
        PID:4600
      - C:\Users\Admin\AppData\Local\Temp\111.EXE
        
        "C:\Users\Admin\AppData\Local\Temp\111.EXE"
        6⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:3216
        
        C:\Users\Admin\AppData\Local\Temp\111.EXE
        
        /scomma "C:\Users\Admin\AppData\Local\Temp\BlVJSCb2Ry.ini"
        7⤵
        Executes dropped EXE
        
        PID:1512
        
        C:\Users\Admin\AppData\Local\Temp\111.EXE
        
        /scomma "C:\Users\Admin\AppData\Local\Temp\u8OlOilOLT.ini"
        7⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        
        PID:4164
      - C:\Users\Admin\AppData\Local\Temp\WINDOWS RUNNER.EXE
        
        "C:\Users\Admin\AppData\Local\Temp\WINDOWS RUNNER.EXE"
        6⤵
        Modifies WinLogon for persistence
        Executes dropped EXE
        Checks computer location settings
        Adds Run key to start application
        Drops file in System32 directory
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1200
        
        C:\Windows\SysWOW64\MSDCSC\sysdate.exe
        
        "C:\Windows\system32\MSDCSC\sysdate.exe"
        7⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:4840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/1200-151-0x0000000002260000-0x0000000002261000-memory.dmp

Filesize
4KB

Download
memory/1512-150-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1512-149-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1512-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4164-156-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4164-159-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4164-160-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4840-154-0x0000000002030000-0x0000000002031000-memory.dmp

Filesize
4KB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads