stormkitty | bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df

General

Target

Startup.exe
Size

41KB
MD5

5e70c383a38d3ecc7d779bc76e61753f
SHA1

4d94fe4fc00e52703fbe15d18e85998f6a92e053
SHA256

bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df
SHA512

17436a0501449867f1f0482357ac5a7c8cc706b69ddb11ed26ba68153aabb027bd7fc78ba6731378c72777acca0ef4199c5f3049b06472dd49a930909729771c
SSDEEP

768:TcAz60wqEL3OixHL1s7LZy69wF19j5Q6EO9h0LV:TcAz60K/xHLG7LZaF19j5Q6EO9EV

Score

10^/10

stormkitty xworm credential_access discovery execution persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

DkTNOCQ3zN28Lubg

Attributes

Install_directory
%AppData%
install_file
Startup.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/112-1-0x0000000000E40000-0x0000000000E50000-memory.dmp	family_xworm
behavioral2/files/0x000700000002429d-45.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/112-68-0x000000001DE60000-0x000000001DF80000-memory.dmp	family_stormkitty

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1476	powershell.exe
4504	powershell.exe
4868	powershell.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-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	Startup.exe

Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
credential_access stealer

Windows Credential Manager
T1555.004

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2096	Startup.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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-1-5-21-308834014-1004923324-1191300197-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Startup = "C:\\Users\\Admin\\AppData\\Roaming\\Startup.exe"	Startup.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1476	powershell.exe
1476	powershell.exe
4504	powershell.exe
4504	powershell.exe
4868	powershell.exe
4868	powershell.exe
4868	powershell.exe
112	Startup.exe
112	Startup.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	112	Startup.exe
Token: SeDebugPrivilege	1476	powershell.exe
Token: SeDebugPrivilege	4504	powershell.exe
Token: SeDebugPrivilege	4868	powershell.exe
Token: SeDebugPrivilege	2096	Startup.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 112 wrote to memory of 1476	112	Startup.exe	90
PID 112 wrote to memory of 1476	112	Startup.exe	90
PID 112 wrote to memory of 4504	112	Startup.exe	94
PID 112 wrote to memory of 4504	112	Startup.exe	94
PID 112 wrote to memory of 4868	112	Startup.exe	98
PID 112 wrote to memory of 4868	112	Startup.exe	98
PID 3804 wrote to memory of 2096	3804	cmd.exe	102
PID 3804 wrote to memory of 2096	3804	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\Startup.exe
"C:\Users\Admin\AppData\Local\Temp\Startup.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:112
- 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\Startup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1476
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Startup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4504
- 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\Roaming\Startup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4868

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\Startup.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:3804
- C:\Users\Admin\AppData\Roaming\Startup.exe
  C:\Users\Admin\AppData\Roaming\Startup.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

2

T1555

Credentials from Web Browsers

1

T1555.003

Windows Credential Manager

1

T1555.004

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
9789f8ddef91421fc6698bcea52563bc

SHA1
8f2cd83e1c60733d88e01d7fb0e7ca9875157eec

SHA256
f8d7ec2150c03317addd37074f67f3e3e494b8f2081d3268be3f1eccc9c6ed47

SHA512
a96f67dd0fc9a2f4ddc9f9c1c98ce875912d8c9371affdf457989561066174bcb04702187787b9eeb4e6567b68f9999cfca3e0ef31b181a214c1b55fe02887ef

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

Filesize
944B

MD5
d8cb3e9459807e35f02130fad3f9860d

SHA1
5af7f32cb8a30e850892b15e9164030a041f4bd6

SHA256
2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68

SHA512
045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_b4zwwydu.4eg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Startup.exe

Filesize
41KB

MD5
5e70c383a38d3ecc7d779bc76e61753f

SHA1
4d94fe4fc00e52703fbe15d18e85998f6a92e053

SHA256
bb3d1286bb2b5bc25e0818fca4a7d4f18e0a818cf543dd7819ca99937f7966df

SHA512
17436a0501449867f1f0482357ac5a7c8cc706b69ddb11ed26ba68153aabb027bd7fc78ba6731378c72777acca0ef4199c5f3049b06472dd49a930909729771c

Download Submit
memory/112-61-0x00007FFAE8930000-0x00007FFAE93F1000-memory.dmp

Filesize
10.8MB

Download
memory/112-1-0x0000000000E40000-0x0000000000E50000-memory.dmp

Filesize
64KB

Download
memory/112-0-0x00007FFAE8933000-0x00007FFAE8935000-memory.dmp

Filesize
8KB

Download
memory/112-66-0x00007FFAE8930000-0x00007FFAE93F1000-memory.dmp

Filesize
10.8MB

Download
memory/112-67-0x000000001DAA0000-0x000000001DAAE000-memory.dmp

Filesize
56KB

Download
memory/112-68-0x000000001DE60000-0x000000001DF80000-memory.dmp

Filesize
1.1MB

Download
memory/112-104-0x000000001E950000-0x000000001ECA0000-memory.dmp

Filesize
3.3MB

Download
memory/1476-14-0x00007FFAE8930000-0x00007FFAE93F1000-memory.dmp

Filesize
10.8MB

Download
memory/1476-17-0x00007FFAE8930000-0x00007FFAE93F1000-memory.dmp

Filesize
10.8MB

Download
memory/1476-13-0x00007FFAE8930000-0x00007FFAE93F1000-memory.dmp

Filesize
10.8MB

Download
memory/1476-12-0x00007FFAE8930000-0x00007FFAE93F1000-memory.dmp

Filesize
10.8MB

Download
memory/1476-11-0x000001B6AD110000-0x000001B6AD132000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads