darkcomet | a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71

Analysis

max time kernel
151s
max time network
49s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
20/10/2022, 21:50

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General

Target

a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Size

673KB
MD5

a02f714012eb9681c2f45a162e57759a
SHA1

828aa6e08014125a66d0decd0c79760ebc90c2dc
SHA256

a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71
SHA512

b1d963eb35c799a70638ccbab7a8a6d3ca7d47218882b980ef5002dbef32ad6fa0cf88128bdbb9bbe4a76316f33e032cf3c9414998020fecba4a6bc192ef46f9
SSDEEP

12288:09HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hlu:4Z1xuVVjfFoynPaVBUR8f+kN10EB2

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

thewirartravels.no-ip.org:1604

Mutex

DC_MUTEX-DS3KZHJ

Attributes

InstallPath
MSDCSC\toolbar.bat
gencode
7D7yZb80ttsb
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

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\\toolbar.bat"	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	toolbar.bat

Executes dropped EXE 1 IoCs

pid	Process
2008	toolbar.bat

Loads dropped DLL 2 IoCs

pid	Process
1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\toolbar.bat"	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\toolbar.bat"	toolbar.bat

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

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2008	toolbar.bat

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeSecurityPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeTakeOwnershipPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeLoadDriverPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeSystemProfilePrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeSystemtimePrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeProfSingleProcessPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeIncBasePriorityPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeCreatePagefilePrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeBackupPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeRestorePrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeShutdownPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeDebugPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeSystemEnvironmentPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeChangeNotifyPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeRemoteShutdownPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeUndockPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeManageVolumePrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeImpersonatePrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeCreateGlobalPrivilege	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: 33	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: 34	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: 35	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
Token: SeIncreaseQuotaPrivilege	2008	toolbar.bat
Token: SeSecurityPrivilege	2008	toolbar.bat
Token: SeTakeOwnershipPrivilege	2008	toolbar.bat
Token: SeLoadDriverPrivilege	2008	toolbar.bat
Token: SeSystemProfilePrivilege	2008	toolbar.bat
Token: SeSystemtimePrivilege	2008	toolbar.bat
Token: SeProfSingleProcessPrivilege	2008	toolbar.bat
Token: SeIncBasePriorityPrivilege	2008	toolbar.bat
Token: SeCreatePagefilePrivilege	2008	toolbar.bat
Token: SeBackupPrivilege	2008	toolbar.bat
Token: SeRestorePrivilege	2008	toolbar.bat
Token: SeShutdownPrivilege	2008	toolbar.bat
Token: SeDebugPrivilege	2008	toolbar.bat
Token: SeSystemEnvironmentPrivilege	2008	toolbar.bat
Token: SeChangeNotifyPrivilege	2008	toolbar.bat
Token: SeRemoteShutdownPrivilege	2008	toolbar.bat
Token: SeUndockPrivilege	2008	toolbar.bat
Token: SeManageVolumePrivilege	2008	toolbar.bat
Token: SeImpersonatePrivilege	2008	toolbar.bat
Token: SeCreateGlobalPrivilege	2008	toolbar.bat
Token: 33	2008	toolbar.bat
Token: 34	2008	toolbar.bat
Token: 35	2008	toolbar.bat

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2008	toolbar.bat

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1324 wrote to memory of 2008	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe	27
PID 1324 wrote to memory of 2008	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe	27
PID 1324 wrote to memory of 2008	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe	27
PID 1324 wrote to memory of 2008	1324	a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe	27
PID 2008 wrote to memory of 1020	2008	toolbar.bat	28
PID 2008 wrote to memory of 1020	2008	toolbar.bat	28
PID 2008 wrote to memory of 1020	2008	toolbar.bat	28
PID 2008 wrote to memory of 1020	2008	toolbar.bat	28
PID 2008 wrote to memory of 1640	2008	toolbar.bat	29
PID 2008 wrote to memory of 1640	2008	toolbar.bat	29
PID 2008 wrote to memory of 1640	2008	toolbar.bat	29
PID 2008 wrote to memory of 1640	2008	toolbar.bat	29
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30
PID 2008 wrote to memory of 1152	2008	toolbar.bat	30

C:\Users\Admin\AppData\Local\Temp\a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe
"C:\Users\Admin\AppData\Local\Temp\a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Users\Admin\Documents\MSDCSC\toolbar.bat
  "C:\Users\Admin\Documents\MSDCSC\toolbar.bat"
  2⤵
  - Disables RegEdit via registry modification
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    PID:1020
- - C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    3⤵
    PID:1640
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:1152

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

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\toolbar.bat

Filesize
673KB

MD5
a02f714012eb9681c2f45a162e57759a

SHA1
828aa6e08014125a66d0decd0c79760ebc90c2dc

SHA256
a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71

SHA512
b1d963eb35c799a70638ccbab7a8a6d3ca7d47218882b980ef5002dbef32ad6fa0cf88128bdbb9bbe4a76316f33e032cf3c9414998020fecba4a6bc192ef46f9

Download Submit
C:\Users\Admin\Documents\MSDCSC\toolbar.bat

Filesize
673KB

MD5
a02f714012eb9681c2f45a162e57759a

SHA1
828aa6e08014125a66d0decd0c79760ebc90c2dc

SHA256
a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71

SHA512
b1d963eb35c799a70638ccbab7a8a6d3ca7d47218882b980ef5002dbef32ad6fa0cf88128bdbb9bbe4a76316f33e032cf3c9414998020fecba4a6bc192ef46f9

Download Submit
\Users\Admin\Documents\MSDCSC\toolbar.bat

Filesize
673KB

MD5
a02f714012eb9681c2f45a162e57759a

SHA1
828aa6e08014125a66d0decd0c79760ebc90c2dc

SHA256
a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71

SHA512
b1d963eb35c799a70638ccbab7a8a6d3ca7d47218882b980ef5002dbef32ad6fa0cf88128bdbb9bbe4a76316f33e032cf3c9414998020fecba4a6bc192ef46f9

Download Submit
\Users\Admin\Documents\MSDCSC\toolbar.bat

Filesize
673KB

MD5
a02f714012eb9681c2f45a162e57759a

SHA1
828aa6e08014125a66d0decd0c79760ebc90c2dc

SHA256
a4d929f841b8c0ad8bdee2f2bd140193016352e4c46f5d8b4731c9703fdd2f71

SHA512
b1d963eb35c799a70638ccbab7a8a6d3ca7d47218882b980ef5002dbef32ad6fa0cf88128bdbb9bbe4a76316f33e032cf3c9414998020fecba4a6bc192ef46f9

Download Submit
memory/1324-54-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads