darkcomet | 8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2024 11:11

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General

Target

8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Size

251KB
MD5

57bd4f73690590693b5b921f29679410
SHA1

c2cb47bf602541043589e979f21c3d7c1698e3ac
SHA256

8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa
SHA512

00b543644058a93f1c0a13e4d40b1c4e76f9581325f1773d79983761ca6903643e5a44717e7785b27a8fac2a6609c19032e3f412d3339e9cc5dc697791890318
SSDEEP

6144:ZcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:ZcW7KEZlPzCy37

Score

10^/10

darkcomet googledebugger discovery evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

GoogleDebugger

147.185.221.24:14161

Mutex

RO_MUTEX-8HU43EZ

Attributes

InstallPath
ChromeCookies\ChromeCookie.exe
gencode
WN0BLB8aPxBw
install
true
offline_keylogger
true
persistence
true
reg_key
GoogleDebugJ

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

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\\AppData\\Local\\Temp\\ChromeCookies\\ChromeCookie.exe"	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe

Disables Task Manager via registry modification
evasion

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
3576	attrib.exe
3972	attrib.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe

Executes dropped EXE 1 IoCs

pid	Process
3324	ChromeCookie.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GoogleDebugJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ChromeCookies\\ChromeCookie.exe"	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GoogleDebugJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ChromeCookies\\ChromeCookie.exe"	ChromeCookie.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GoogleDebugJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ChromeCookies\\ChromeCookie.exe"	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3324 set thread context of 772	3324	ChromeCookie.exe	92

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3016-0-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/files/0x0008000000023ca7-7.dat	upx
behavioral2/memory/3324-36-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/772-38-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3324-40-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3016-42-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ChromeCookie.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeSecurityPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeTakeOwnershipPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeLoadDriverPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeSystemProfilePrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeSystemtimePrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeProfSingleProcessPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeIncBasePriorityPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeCreatePagefilePrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeBackupPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeRestorePrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeShutdownPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeDebugPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeSystemEnvironmentPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeChangeNotifyPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeRemoteShutdownPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeUndockPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeManageVolumePrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeImpersonatePrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeCreateGlobalPrivilege	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: 33	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: 34	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: 35	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: 36	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
Token: SeIncreaseQuotaPrivilege	3324	ChromeCookie.exe
Token: SeSecurityPrivilege	3324	ChromeCookie.exe
Token: SeTakeOwnershipPrivilege	3324	ChromeCookie.exe
Token: SeLoadDriverPrivilege	3324	ChromeCookie.exe
Token: SeSystemProfilePrivilege	3324	ChromeCookie.exe
Token: SeSystemtimePrivilege	3324	ChromeCookie.exe
Token: SeProfSingleProcessPrivilege	3324	ChromeCookie.exe
Token: SeIncBasePriorityPrivilege	3324	ChromeCookie.exe
Token: SeCreatePagefilePrivilege	3324	ChromeCookie.exe
Token: SeBackupPrivilege	3324	ChromeCookie.exe
Token: SeRestorePrivilege	3324	ChromeCookie.exe
Token: SeShutdownPrivilege	3324	ChromeCookie.exe
Token: SeDebugPrivilege	3324	ChromeCookie.exe
Token: SeSystemEnvironmentPrivilege	3324	ChromeCookie.exe
Token: SeChangeNotifyPrivilege	3324	ChromeCookie.exe
Token: SeRemoteShutdownPrivilege	3324	ChromeCookie.exe
Token: SeUndockPrivilege	3324	ChromeCookie.exe
Token: SeManageVolumePrivilege	3324	ChromeCookie.exe
Token: SeImpersonatePrivilege	3324	ChromeCookie.exe
Token: SeCreateGlobalPrivilege	3324	ChromeCookie.exe
Token: 33	3324	ChromeCookie.exe
Token: 34	3324	ChromeCookie.exe
Token: 35	3324	ChromeCookie.exe
Token: 36	3324	ChromeCookie.exe
Token: SeIncreaseQuotaPrivilege	772	iexplore.exe
Token: SeSecurityPrivilege	772	iexplore.exe
Token: SeTakeOwnershipPrivilege	772	iexplore.exe
Token: SeLoadDriverPrivilege	772	iexplore.exe
Token: SeSystemProfilePrivilege	772	iexplore.exe
Token: SeSystemtimePrivilege	772	iexplore.exe
Token: SeProfSingleProcessPrivilege	772	iexplore.exe
Token: SeIncBasePriorityPrivilege	772	iexplore.exe
Token: SeCreatePagefilePrivilege	772	iexplore.exe
Token: SeBackupPrivilege	772	iexplore.exe
Token: SeRestorePrivilege	772	iexplore.exe
Token: SeShutdownPrivilege	772	iexplore.exe
Token: SeDebugPrivilege	772	iexplore.exe
Token: SeSystemEnvironmentPrivilege	772	iexplore.exe
Token: SeChangeNotifyPrivilege	772	iexplore.exe
Token: SeRemoteShutdownPrivilege	772	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
772	iexplore.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 2208	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	85
PID 3016 wrote to memory of 2208	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	85
PID 3016 wrote to memory of 2208	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	85
PID 3016 wrote to memory of 592	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	87
PID 3016 wrote to memory of 592	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	87
PID 3016 wrote to memory of 592	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	87
PID 2208 wrote to memory of 3576	2208	cmd.exe	89
PID 2208 wrote to memory of 3576	2208	cmd.exe	89
PID 2208 wrote to memory of 3576	2208	cmd.exe	89
PID 592 wrote to memory of 3972	592	cmd.exe	90
PID 592 wrote to memory of 3972	592	cmd.exe	90
PID 592 wrote to memory of 3972	592	cmd.exe	90
PID 3016 wrote to memory of 3324	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	91
PID 3016 wrote to memory of 3324	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	91
PID 3016 wrote to memory of 3324	3016	8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe	91
PID 3324 wrote to memory of 772	3324	ChromeCookie.exe	92
PID 3324 wrote to memory of 772	3324	ChromeCookie.exe	92
PID 3324 wrote to memory of 772	3324	ChromeCookie.exe	92
PID 3324 wrote to memory of 772	3324	ChromeCookie.exe	92
PID 3324 wrote to memory of 772	3324	ChromeCookie.exe	92
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93
PID 772 wrote to memory of 1284	772	iexplore.exe	93

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3576	attrib.exe
3972	attrib.exe

C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe
"C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2208
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa_Sigmanly.exe" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:3576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:592
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:3972
- C:\Users\Admin\AppData\Local\Temp\ChromeCookies\ChromeCookie.exe
  "C:\Users\Admin\AppData\Local\Temp\ChromeCookies\ChromeCookie.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3324
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:772
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      System Location Discovery: System Language Discovery
      PID:1284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ChromeCookies\ChromeCookie.exe

Filesize
251KB

MD5
57bd4f73690590693b5b921f29679410

SHA1
c2cb47bf602541043589e979f21c3d7c1698e3ac

SHA256
8a3de78cf177be4c37c1525becf05af336c1dc2a4d181cae79f6903754902efa

SHA512
00b543644058a93f1c0a13e4d40b1c4e76f9581325f1773d79983761ca6903643e5a44717e7785b27a8fac2a6609c19032e3f412d3339e9cc5dc697791890318

Download Submit
memory/772-38-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1284-41-0x0000000000D70000-0x0000000000D71000-memory.dmp

Filesize
4KB

Download
memory/3016-0-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3016-1-0x0000000000B10000-0x0000000000B11000-memory.dmp

Filesize
4KB

Download
memory/3016-42-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3324-36-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3324-37-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/3324-40-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads