darkcomet | b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2

Analysis

max time kernel
4294211s
max time network
124s
platform
windows7_x64
resource
win7-20220311-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 12 IoCs

resource	yara_rule
behavioral1/files/0x00070000000142d3-62.dat	family_isrstealer
behavioral1/files/0x00070000000142d3-63.dat	family_isrstealer
behavioral1/files/0x00070000000142d3-64.dat	family_isrstealer
behavioral1/files/0x00070000000142d3-65.dat	family_isrstealer
behavioral1/files/0x000e000000012322-67.dat	family_isrstealer
behavioral1/files/0x000e000000012322-68.dat	family_isrstealer
behavioral1/files/0x000e000000012322-69.dat	family_isrstealer
behavioral1/files/0x000e000000012322-76.dat	family_isrstealer
behavioral1/files/0x000e000000012322-77.dat	family_isrstealer
behavioral1/files/0x000e000000012322-79.dat	family_isrstealer
behavioral1/files/0x000e000000012322-94.dat	family_isrstealer
behavioral1/files/0x000e000000012322-96.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
behavioral1/memory/1364-100-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral1/memory/1364-100-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

Executes dropped EXE 7 IoCs

pid	Process
1116	abc.exe
1652	beta.exe
512	111.EXE
1568	WINDOWS RUNNER.EXE
1128	111.EXE
880	sysdate.exe
1364	111.EXE

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0006000000014b63-57.dat	upx
behavioral1/files/0x0006000000014b63-56.dat	upx
behavioral1/files/0x0006000000014b63-58.dat	upx
behavioral1/files/0x0006000000014b63-59.dat	upx
behavioral1/memory/1128-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1128-82-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1128-83-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1364-95-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1364-99-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1364-100-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Loads dropped DLL 12 IoCs

pid	Process
1688	cmd.exe
1688	cmd.exe
852	cmd.exe
852	cmd.exe
1652	beta.exe
1652	beta.exe
1652	beta.exe
1652	beta.exe
512	111.EXE
1568	WINDOWS RUNNER.EXE
1568	WINDOWS RUNNER.EXE
512	111.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-1-5-21-2199625441-3471261906-229485034-1000\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-1-5-21-2199625441-3471261906-229485034-1000\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 created	C:\Windows\SysWOW64\MSDCSC\sysdate.exe	WINDOWS RUNNER.EXE
File opened for modification	C:\Windows\SysWOW64\MSDCSC\sysdate.exe	WINDOWS RUNNER.EXE
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	WINDOWS RUNNER.EXE

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 512 set thread context of 1128	512	111.EXE	35
PID 512 set thread context of 1364	512	111.EXE	39

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 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeSecurityPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeTakeOwnershipPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeLoadDriverPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeSystemProfilePrivilege	1568	WINDOWS RUNNER.EXE
Token: SeSystemtimePrivilege	1568	WINDOWS RUNNER.EXE
Token: SeProfSingleProcessPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeIncBasePriorityPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeCreatePagefilePrivilege	1568	WINDOWS RUNNER.EXE
Token: SeBackupPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeRestorePrivilege	1568	WINDOWS RUNNER.EXE
Token: SeShutdownPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeDebugPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeSystemEnvironmentPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeChangeNotifyPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeRemoteShutdownPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeUndockPrivilege	1568	WINDOWS RUNNER.EXE
Token: SeManageVolumePrivilege	1568	WINDOWS RUNNER.EXE
Token: SeImpersonatePrivilege	1568	WINDOWS RUNNER.EXE
Token: SeCreateGlobalPrivilege	1568	WINDOWS RUNNER.EXE
Token: 33	1568	WINDOWS RUNNER.EXE
Token: 34	1568	WINDOWS RUNNER.EXE
Token: 35	1568	WINDOWS RUNNER.EXE
Token: SeIncreaseQuotaPrivilege	880	sysdate.exe
Token: SeSecurityPrivilege	880	sysdate.exe
Token: SeTakeOwnershipPrivilege	880	sysdate.exe
Token: SeLoadDriverPrivilege	880	sysdate.exe
Token: SeSystemProfilePrivilege	880	sysdate.exe
Token: SeSystemtimePrivilege	880	sysdate.exe
Token: SeProfSingleProcessPrivilege	880	sysdate.exe
Token: SeIncBasePriorityPrivilege	880	sysdate.exe
Token: SeCreatePagefilePrivilege	880	sysdate.exe
Token: SeBackupPrivilege	880	sysdate.exe
Token: SeRestorePrivilege	880	sysdate.exe
Token: SeShutdownPrivilege	880	sysdate.exe
Token: SeDebugPrivilege	880	sysdate.exe
Token: SeSystemEnvironmentPrivilege	880	sysdate.exe
Token: SeChangeNotifyPrivilege	880	sysdate.exe
Token: SeRemoteShutdownPrivilege	880	sysdate.exe
Token: SeUndockPrivilege	880	sysdate.exe
Token: SeManageVolumePrivilege	880	sysdate.exe
Token: SeImpersonatePrivilege	880	sysdate.exe
Token: SeCreateGlobalPrivilege	880	sysdate.exe
Token: 33	880	sysdate.exe
Token: 34	880	sysdate.exe
Token: 35	880	sysdate.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
512	111.EXE
880	sysdate.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 1168 wrote to memory of 1688	1168	b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe	28
PID 1168 wrote to memory of 1688	1168	b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe	28
PID 1168 wrote to memory of 1688	1168	b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe	28
PID 1168 wrote to memory of 1688	1168	b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe	28
PID 1688 wrote to memory of 1116	1688	cmd.exe	29
PID 1688 wrote to memory of 1116	1688	cmd.exe	29
PID 1688 wrote to memory of 1116	1688	cmd.exe	29
PID 1688 wrote to memory of 1116	1688	cmd.exe	29
PID 1116 wrote to memory of 852	1116	abc.exe	31
PID 1116 wrote to memory of 852	1116	abc.exe	31
PID 1116 wrote to memory of 852	1116	abc.exe	31
PID 1116 wrote to memory of 852	1116	abc.exe	31
PID 852 wrote to memory of 1652	852	cmd.exe	32
PID 852 wrote to memory of 1652	852	cmd.exe	32
PID 852 wrote to memory of 1652	852	cmd.exe	32
PID 852 wrote to memory of 1652	852	cmd.exe	32
PID 1652 wrote to memory of 512	1652	beta.exe	33
PID 1652 wrote to memory of 512	1652	beta.exe	33
PID 1652 wrote to memory of 512	1652	beta.exe	33
PID 1652 wrote to memory of 512	1652	beta.exe	33
PID 1652 wrote to memory of 1568	1652	beta.exe	34
PID 1652 wrote to memory of 1568	1652	beta.exe	34
PID 1652 wrote to memory of 1568	1652	beta.exe	34
PID 1652 wrote to memory of 1568	1652	beta.exe	34
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 512 wrote to memory of 1128	512	111.EXE	35
PID 1568 wrote to memory of 880	1568	WINDOWS RUNNER.EXE	36
PID 1568 wrote to memory of 880	1568	WINDOWS RUNNER.EXE	36
PID 1568 wrote to memory of 880	1568	WINDOWS RUNNER.EXE	36
PID 1568 wrote to memory of 880	1568	WINDOWS RUNNER.EXE	36
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39
PID 512 wrote to memory of 1364	512	111.EXE	39

C:\Users\Admin\AppData\Local\Temp\b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe
"C:\Users\Admin\AppData\Local\Temp\b2784bbe213a75389177773a1e0932c0e70721d3e61f94fc64767ec146442cc2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1168
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\2A2C.tmp\abc2.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1688
- - C:\Users\Admin\AppData\Local\Temp\abc.exe
    abc.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:1116
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\43D4.tmp\abc.bat""
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:852
    - - C:\Users\Admin\AppData\Local\Temp\beta.exe
        
        beta.exe
        5⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of WriteProcessMemory
        
        PID:1652
      - C:\Users\Admin\AppData\Local\Temp\111.EXE
        
        "C:\Users\Admin\AppData\Local\Temp\111.EXE"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:512
        
        C:\Users\Admin\AppData\Local\Temp\111.EXE
        
        /scomma "C:\Users\Admin\AppData\Local\Temp\Kw59260RLs.ini"
        7⤵
        Executes dropped EXE
        
        PID:1128
        
        C:\Users\Admin\AppData\Local\Temp\111.EXE
        
        /scomma "C:\Users\Admin\AppData\Local\Temp\4pkORk80SK.ini"
        7⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        
        PID:1364
      - 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
        Loads dropped DLL
        Adds Run key to start application
        Drops file in System32 directory
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1568
        
        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:880

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

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/880-91-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/1128-83-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1128-82-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1128-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1168-54-0x0000000075BB1000-0x0000000075BB3000-memory.dmp

Filesize
8KB

Download
memory/1364-95-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1364-99-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1364-100-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1568-90-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads