stormkitty | 6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993

Analysis

max time kernel
297s
max time network
293s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09-09-2024 05:03

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General

Target

6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe
Size

94KB
MD5

db5717fd494495eea3c8f7d4ab29d6b0
SHA1

39ba82340121d9b08e9cf3d4ba6dfcb12eb6c559
SHA256

6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993
SHA512

b16c7bffc8418a0349e5189d61439df325d2ab33a42c720380a305decde00348f83d96b6c263a95dc253128eb0e47b1a3dc96f8f115da868ff9227b9a40882de
SSDEEP

1536:1z8H8uTSHKoKlDeE0C3shB1ueVby8EXEFA4Xib6TWcgMfAOISZsw61EmS:+c/q/l6EP3mvuwby8EXuhX6cgXOI0stE

Score

10^/10

stormkitty xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

xworm

exonic-hacks.com:1920

Attributes

Install_directory
%Userprofile%
install_file
Windows.exe

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/memory/4236-184-0x000000001ADF0000-0x000000001ADFE000-memory.dmp	disable_win_def

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4236-1-0x00000000001D0000-0x00000000001EE000-memory.dmp	family_xworm
behavioral2/files/0x000d00000001ab17-194.dat	family_xworm

StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/4236-185-0x000000001C9F0000-0x000000001CB0E000-memory.dmp	family_stormkitty

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3540	powershell.exe
2816	powershell.exe
2344	powershell.exe
1136	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows.lnk	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows.lnk	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe

Executes dropped EXE 5 IoCs

pid	Process
4100	Windows.exe
4260	Windows.exe
4680	Windows.exe
2992	Windows.exe
1136	Windows.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows = "C:\\Users\\Admin\\Windows.exe"	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
352	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
2344	powershell.exe
2344	powershell.exe
2344	powershell.exe
1136	powershell.exe
1136	powershell.exe
1136	powershell.exe
3540	powershell.exe
3540	powershell.exe
3540	powershell.exe
2816	powershell.exe
2816	powershell.exe
2816	powershell.exe
4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe
4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe
4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe
Token: SeDebugPrivilege	2344	powershell.exe
Token: SeIncreaseQuotaPrivilege	2344	powershell.exe
Token: SeSecurityPrivilege	2344	powershell.exe
Token: SeTakeOwnershipPrivilege	2344	powershell.exe
Token: SeLoadDriverPrivilege	2344	powershell.exe
Token: SeSystemProfilePrivilege	2344	powershell.exe
Token: SeSystemtimePrivilege	2344	powershell.exe
Token: SeProfSingleProcessPrivilege	2344	powershell.exe
Token: SeIncBasePriorityPrivilege	2344	powershell.exe
Token: SeCreatePagefilePrivilege	2344	powershell.exe
Token: SeBackupPrivilege	2344	powershell.exe
Token: SeRestorePrivilege	2344	powershell.exe
Token: SeShutdownPrivilege	2344	powershell.exe
Token: SeDebugPrivilege	2344	powershell.exe
Token: SeSystemEnvironmentPrivilege	2344	powershell.exe
Token: SeRemoteShutdownPrivilege	2344	powershell.exe
Token: SeUndockPrivilege	2344	powershell.exe
Token: SeManageVolumePrivilege	2344	powershell.exe
Token: 33	2344	powershell.exe
Token: 34	2344	powershell.exe
Token: 35	2344	powershell.exe
Token: 36	2344	powershell.exe
Token: SeDebugPrivilege	1136	powershell.exe
Token: SeIncreaseQuotaPrivilege	1136	powershell.exe
Token: SeSecurityPrivilege	1136	powershell.exe
Token: SeTakeOwnershipPrivilege	1136	powershell.exe
Token: SeLoadDriverPrivilege	1136	powershell.exe
Token: SeSystemProfilePrivilege	1136	powershell.exe
Token: SeSystemtimePrivilege	1136	powershell.exe
Token: SeProfSingleProcessPrivilege	1136	powershell.exe
Token: SeIncBasePriorityPrivilege	1136	powershell.exe
Token: SeCreatePagefilePrivilege	1136	powershell.exe
Token: SeBackupPrivilege	1136	powershell.exe
Token: SeRestorePrivilege	1136	powershell.exe
Token: SeShutdownPrivilege	1136	powershell.exe
Token: SeDebugPrivilege	1136	powershell.exe
Token: SeSystemEnvironmentPrivilege	1136	powershell.exe
Token: SeRemoteShutdownPrivilege	1136	powershell.exe
Token: SeUndockPrivilege	1136	powershell.exe
Token: SeManageVolumePrivilege	1136	powershell.exe
Token: 33	1136	powershell.exe
Token: 34	1136	powershell.exe
Token: 35	1136	powershell.exe
Token: 36	1136	powershell.exe
Token: SeDebugPrivilege	3540	powershell.exe
Token: SeIncreaseQuotaPrivilege	3540	powershell.exe
Token: SeSecurityPrivilege	3540	powershell.exe
Token: SeTakeOwnershipPrivilege	3540	powershell.exe
Token: SeLoadDriverPrivilege	3540	powershell.exe
Token: SeSystemProfilePrivilege	3540	powershell.exe
Token: SeSystemtimePrivilege	3540	powershell.exe
Token: SeProfSingleProcessPrivilege	3540	powershell.exe
Token: SeIncBasePriorityPrivilege	3540	powershell.exe
Token: SeCreatePagefilePrivilege	3540	powershell.exe
Token: SeBackupPrivilege	3540	powershell.exe
Token: SeRestorePrivilege	3540	powershell.exe
Token: SeShutdownPrivilege	3540	powershell.exe
Token: SeDebugPrivilege	3540	powershell.exe
Token: SeSystemEnvironmentPrivilege	3540	powershell.exe
Token: SeRemoteShutdownPrivilege	3540	powershell.exe
Token: SeUndockPrivilege	3540	powershell.exe
Token: SeManageVolumePrivilege	3540	powershell.exe
Token: 33	3540	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 2344	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	73
PID 4236 wrote to memory of 2344	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	73
PID 4236 wrote to memory of 1136	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	76
PID 4236 wrote to memory of 1136	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	76
PID 4236 wrote to memory of 3540	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	78
PID 4236 wrote to memory of 3540	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	78
PID 4236 wrote to memory of 2816	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	80
PID 4236 wrote to memory of 2816	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	80
PID 4236 wrote to memory of 352	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	82
PID 4236 wrote to memory of 352	4236	6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe	82

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe
"C:\Users\Admin\AppData\Local\Temp\6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2344
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1136
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\Windows.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3540
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:2816
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows" /tr "C:\Users\Admin\Windows.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:352

C:\Users\Admin\Windows.exe
C:\Users\Admin\Windows.exe
1⤵
- Executes dropped EXE
PID:4100

C:\Users\Admin\Windows.exe
C:\Users\Admin\Windows.exe
1⤵
- Executes dropped EXE
PID:4260

C:\Users\Admin\Windows.exe
C:\Users\Admin\Windows.exe
1⤵
- Executes dropped EXE
PID:4680

C:\Users\Admin\Windows.exe
C:\Users\Admin\Windows.exe
1⤵
- Executes dropped EXE
PID:2992

C:\Users\Admin\Windows.exe
C:\Users\Admin\Windows.exe
1⤵
- Executes dropped EXE
PID:1136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Windows.exe.log

Filesize
654B

MD5
16c5fce5f7230eea11598ec11ed42862

SHA1
75392d4824706090f5e8907eee1059349c927600

SHA256
87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151

SHA512
153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
8592ba100a78835a6b94d5949e13dfc1

SHA1
63e901200ab9a57c7dd4c078d7f75dcd3b357020

SHA256
fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c

SHA512
87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
0cf5f35977161dc3aeb7d26bce13b2b1

SHA1
00627c8495a608003488f3ed7a0fb64832ca6c50

SHA256
278af1627bdb2b9431b2b8f15a3267fe6d2547006a928a09c7181b81c49bde2a

SHA512
db47b2281c87f2fcb58dbfa7fc844ec782930217eacc9016af59e448e4cfe03a65a4f9c77be3a1a90165a27140746104af2b19cea9f6235f12d6d8d7cd6ef1f7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
6d3266681efaa78fb713e4f42b662b2b

SHA1
9dc83714f5136fb7c8dc66a8f85f380cc523eaeb

SHA256
67b4cb7e1149fa332ce1d9ea48991649d4156b727d5459e0225e7a5c8f22bc5f

SHA512
78ee79d9af4066995ba5ccf04af14ebbc4911979cac7150dfd75cc38e4d6c987a0fe45e06055027213a1938243ef7d8c4023b0873af6248fc969e21d5eaa2698

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
ac93bc54d35c821994548e1488cfce7d

SHA1
8aa80b32a5e639ed72b25a1206ddfb9601243af1

SHA256
e21901fe8cc7b9f94d8f776d56c6006ca4d495e76aa0205d1fe78b62afa4b5bc

SHA512
f45f063b0793e0f5c9cbe4d8304c07bc11a2bfad7336d86d78e00d3fdffbe1a2b71609bfd7a6212d18df0e87ef549ef8647d8b52b23759c8bfefec0e1cc31939

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kt2q2keu.4i2.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
C:\Users\Admin\Windows.exe

Filesize
94KB

MD5
db5717fd494495eea3c8f7d4ab29d6b0

SHA1
39ba82340121d9b08e9cf3d4ba6dfcb12eb6c559

SHA256
6b59309ab12f1859a94fb2ce1c98639b2a538e6e098ffac127e45c29733bd993

SHA512
b16c7bffc8418a0349e5189d61439df325d2ab33a42c720380a305decde00348f83d96b6c263a95dc253128eb0e47b1a3dc96f8f115da868ff9227b9a40882de

Download Submit
memory/2344-10-0x000001AAF18C0000-0x000001AAF18E2000-memory.dmp

Filesize
136KB

Download
memory/2344-13-0x000001AAF1AF0000-0x000001AAF1B66000-memory.dmp

Filesize
472KB

Download
memory/2344-50-0x00007FFFD3120000-0x00007FFFD3B0C000-memory.dmp

Filesize
9.9MB

Download
memory/2344-9-0x00007FFFD3120000-0x00007FFFD3B0C000-memory.dmp

Filesize
9.9MB

Download
memory/2344-8-0x00007FFFD3120000-0x00007FFFD3B0C000-memory.dmp

Filesize
9.9MB

Download
memory/4236-3-0x00007FFFD3120000-0x00007FFFD3B0C000-memory.dmp

Filesize
9.9MB

Download
memory/4236-2-0x00007FFFD3123000-0x00007FFFD3124000-memory.dmp

Filesize
4KB

Download
memory/4236-183-0x00007FFFD3120000-0x00007FFFD3B0C000-memory.dmp

Filesize
9.9MB

Download
memory/4236-184-0x000000001ADF0000-0x000000001ADFE000-memory.dmp

Filesize
56KB

Download
memory/4236-185-0x000000001C9F0000-0x000000001CB0E000-memory.dmp

Filesize
1.1MB

Download
memory/4236-0-0x00007FFFD3123000-0x00007FFFD3124000-memory.dmp

Filesize
4KB

Download
memory/4236-1-0x00000000001D0000-0x00000000001EE000-memory.dmp

Filesize
120KB

Download