stormkitty | 59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa

General

Target

SilverClient.exe
Size

42KB
MD5

e32cc14226ce47c9342ed347c7a47438
SHA1

a8ec8484eebdd76d38988007a21afe56cbeaf951
SHA256

59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa
SHA512

b164661ca40c386843b00cbeff8a86157a23f0e4c5e539fe596fad8786a1752ef50eaa65590a65ae1ca6512e720e3501fece61381b921f55e3ec4855f91bfc63
SSDEEP

768:MiIsJJcPlV1csUxJRBN/l+cJn6590BcmSHrlruPXr7yaaxLEt0URohRULL9S+1fr:MiIsDctUBbn659XTkt0UQGf9Zr1QoE9W

Score

10^/10

stormkitty execution persistence stealer

Malware Config

Signatures

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/1864-29-0x000000001E420000-0x000000001E44A000-memory.dmp	family_stormkitty

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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	$77test.exe

Executes dropped EXE 1 IoCs

pid	Process
1864	$77test.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\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\test\\$77test.exe\""	SilverClient.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4648	powershell.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
3288	timeout.exe
3632	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3544	schtasks.exe
2164	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
4512	SilverClient.exe
1864	$77test.exe
4648	powershell.exe
4648	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	648	vssvc.exe
Token: SeRestorePrivilege	648	vssvc.exe
Token: SeAuditPrivilege	648	vssvc.exe
Token: SeDebugPrivilege	4512	SilverClient.exe
Token: SeDebugPrivilege	1864	$77test.exe
Token: SeDebugPrivilege	4648	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1864	$77test.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4512 wrote to memory of 3504	4512	SilverClient.exe	97
PID 4512 wrote to memory of 3504	4512	SilverClient.exe	97
PID 3504 wrote to memory of 3288	3504	cmd.exe	99
PID 3504 wrote to memory of 3288	3504	cmd.exe	99
PID 3504 wrote to memory of 1864	3504	cmd.exe	100
PID 3504 wrote to memory of 1864	3504	cmd.exe	100
PID 1864 wrote to memory of 2576	1864	$77test.exe	103
PID 1864 wrote to memory of 2576	1864	$77test.exe	103
PID 1864 wrote to memory of 3544	1864	$77test.exe	105
PID 1864 wrote to memory of 3544	1864	$77test.exe	105
PID 1864 wrote to memory of 2620	1864	$77test.exe	107
PID 1864 wrote to memory of 2620	1864	$77test.exe	107
PID 1864 wrote to memory of 4648	1864	$77test.exe	109
PID 1864 wrote to memory of 4648	1864	$77test.exe	109
PID 1864 wrote to memory of 2164	1864	$77test.exe	110
PID 1864 wrote to memory of 2164	1864	$77test.exe	110
PID 1864 wrote to memory of 3544	1864	$77test.exe	114
PID 1864 wrote to memory of 3544	1864	$77test.exe	114
PID 1864 wrote to memory of 3964	1864	$77test.exe	116
PID 1864 wrote to memory of 3964	1864	$77test.exe	116
PID 3964 wrote to memory of 3632	3964	cmd.exe	118
PID 3964 wrote to memory of 3632	3964	cmd.exe	118
PID 3544 wrote to memory of 4060	3544	cmd.exe	119
PID 3544 wrote to memory of 4060	3544	cmd.exe	119

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
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4512
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp68.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3504
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3288
- - C:\Users\Admin\test\$77test.exe
    "C:\Users\Admin\test\$77test.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1864
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77test.exe
      4⤵
      PID:2576
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77test.exe" /TR "C:\Users\Admin\test\$77test.exe \"\$77test.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:3544
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77test.exe
      4⤵
      PID:2620
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4648
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "test_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2164
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "$77test_Task"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3544
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "$77test_Task"
        5⤵
        
        PID:4060
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8A30.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3964
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:3632

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_03kqkoys.sgi.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp68.tmp.bat

Filesize
138B

MD5
a45c7a6339145b9bd67b90cf5e9766d8

SHA1
9971bd67634939b00a763ae37a02235dcdd0a4ee

SHA256
a6f8aaca52dda1cca76ca629901e60a5f53c888c0215a1a64a066462157f39f1

SHA512
e0b48419bdca47d59743a1bf71325f39a4e91bfda979fdf3b4fb0e4f9d4f11bd8f96f1d3313b97cc71bb3c4bb0c06e77f482b088fe042020787f2d0643c284c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8A30.tmp.bat

Filesize
213B

MD5
f6aa6aaee1d753faa19b49a39a8e6d58

SHA1
0bf7ef2e32bd70abcd1ba21165a424bd137cd916

SHA256
8c51731454e483e48ed6664973748539bc5c13c756c25c3480047d540d9fd76f

SHA512
a47ec3a7c663e459e9ba9756aa9a1d5c7f14450838738a7a41ebe498c4f6b8a08f2f247a2240effac7fafb40f93e59d491f12ff76a800309b6c5699d10ab92f7

Download Submit
C:\Users\Admin\test\$77test.exe

Filesize
42KB

MD5
e32cc14226ce47c9342ed347c7a47438

SHA1
a8ec8484eebdd76d38988007a21afe56cbeaf951

SHA256
59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa

SHA512
b164661ca40c386843b00cbeff8a86157a23f0e4c5e539fe596fad8786a1752ef50eaa65590a65ae1ca6512e720e3501fece61381b921f55e3ec4855f91bfc63

Download Submit
memory/1864-29-0x000000001E420000-0x000000001E44A000-memory.dmp

Filesize
168KB

Download
memory/1864-28-0x000000001E400000-0x000000001E420000-memory.dmp

Filesize
128KB

Download
memory/4512-3-0x00007FFF127F3000-0x00007FFF127F5000-memory.dmp

Filesize
8KB

Download
memory/4512-10-0x00007FFF127F0000-0x00007FFF132B1000-memory.dmp

Filesize
10.8MB

Download
memory/4512-4-0x00007FFF127F0000-0x00007FFF132B1000-memory.dmp

Filesize
10.8MB

Download
memory/4512-0-0x00007FFF127F3000-0x00007FFF127F5000-memory.dmp

Filesize
8KB

Download
memory/4512-2-0x00007FFF127F0000-0x00007FFF132B1000-memory.dmp

Filesize
10.8MB

Download
memory/4512-1-0x0000000000BC0000-0x0000000000BD0000-memory.dmp

Filesize
64KB

Download
memory/4648-14-0x000002A5CED80000-0x000002A5CEDA2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads