stormkitty | 20c29406f1b8fbbdff8528feaf19df7be1ace4da2ac3e9c1e34b710667cf7ee7

General

Target

XBinderOutput.exe
Size

498KB
MD5

2c8cf21a477d6bfa16bf2e60125f4b93
SHA1

cc7792f9f8fd2b6508437f5ff3f667cc71893bd8
SHA256

20c29406f1b8fbbdff8528feaf19df7be1ace4da2ac3e9c1e34b710667cf7ee7
SHA512

0b5ef6e9a9737357c26840b1b0cfa7b7c4ff706402d40943a5992e2b3049393d8dd20962c4a5e944b349e7e8de0287f56f81cbd3e5dd7b1e630de5f6d3bdcb69
SSDEEP

12288:vM/2474xjEoCVoe3ieEm7MyuSANU22+zPp7QroGhhZL:0O2OU6e3ieEm7M72+9yosl

Score

10^/10

stormkitty execution stealer

Malware Config

Signatures

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

StormKitty payload 1 IoCs

resource	yara_rule
behavioral1/memory/2376-65-0x000000001B940000-0x000000001B996000-memory.dmp	family_stormkitty

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2816	powershell.exe
2156	powershell.exe

Executes dropped EXE 4 IoCs

pid	Process
1048	llllllll.exe
1488	svchosts.exe
4660	WinRAR.exe
2376	WinRAR.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2156	powershell.exe
2156	powershell.exe
2816	powershell.exe
2816	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1048	llllllll.exe
Token: SeDebugPrivilege	1488	svchosts.exe
Token: SeBackupPrivilege	3024	vssvc.exe
Token: SeRestorePrivilege	3024	vssvc.exe
Token: SeAuditPrivilege	3024	vssvc.exe
Token: SeDebugPrivilege	2156	powershell.exe
Token: SeDebugPrivilege	2816	powershell.exe
Token: SeDebugPrivilege	4660	WinRAR.exe
Token: SeDebugPrivilege	2376	WinRAR.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3612 wrote to memory of 1048	3612	XBinderOutput.exe	82
PID 3612 wrote to memory of 1048	3612	XBinderOutput.exe	82
PID 3612 wrote to memory of 1488	3612	XBinderOutput.exe	83
PID 3612 wrote to memory of 1488	3612	XBinderOutput.exe	83
PID 1048 wrote to memory of 2156	1048	llllllll.exe	88
PID 1048 wrote to memory of 2156	1048	llllllll.exe	88
PID 1048 wrote to memory of 2816	1048	llllllll.exe	90
PID 1048 wrote to memory of 2816	1048	llllllll.exe	90

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\XBinderOutput.exe
"C:\Users\Admin\AppData\Local\Temp\XBinderOutput.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Users\Admin\AppData\Local\Temp\llllllll.exe
  "C:\Users\Admin\AppData\Local\Temp\llllllll.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\WinRAR.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2156
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'WinRAR.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2816
- C:\Users\Admin\AppData\Local\Temp\svchosts.exe
  "C:\Users\Admin\AppData\Local\Temp\svchosts.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1488

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3024

C:\Users\Public\WinRAR.exe
C:\Users\Public\WinRAR.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4660

C:\Users\Public\WinRAR.exe
C:\Users\Public\WinRAR.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
c2c59919d45232691e841adcf85a7ed2

SHA1
f7a1d810e35e455618050f586592a445376c3224

SHA256
e567ead667e68f92cf9b7a7b171f2dd628803add6dc0744004f26808048bb47c

SHA512
bd37bbed0d8512bfaba4185722831ca73fe5be4d5625b74e9f18cfe1cc0bbd4af786c36eca1bd856decbbc68d1f472ee8aef8e1a41b7251ff480e8fb4eabed6b

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sy1sbxhf.hva.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\llllllll.exe

Filesize
510KB

MD5
342f45e65257fb8d75b1a1896eaf35ac

SHA1
927d528d20c2c388e599b9d103cd52c7ea8821ad

SHA256
dd97980e81b5e1e51eb399defba5db7c2f9efa126fa8423955cd670dcd43da11

SHA512
e9c0f2f7da9cacfcebebcd9e72c486ccee5c395770b1ff12d98fccc203d30158b82bc01ba60528a57594309cacc996768c416c7e3a4fc5d248d77093d712eccb

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchosts.exe

Filesize
220KB

MD5
28b08dae6fe1c1af8921fc682a4d466d

SHA1
abedc3b269168207564d74a422b17dbece9b6a30

SHA256
f69a9632a9f823639d35ddd9c3e8cfb8ee92822812707b98aeb7e01dffc27460

SHA512
3a6b4ba2c38b593a89493646865503005d6b08d1f969989cbbb8767100041e629c3d442bffc106d848b93adae2997e3c4bea1795d65aeccb17ed2ca47f6d9494

Download Submit
memory/1048-26-0x0000000000CB0000-0x0000000000D36000-memory.dmp

Filesize
536KB

Download
memory/1048-28-0x00007FFEFBA40000-0x00007FFEFC502000-memory.dmp

Filesize
10.8MB

Download
memory/1048-64-0x00007FFEFBA40000-0x00007FFEFC502000-memory.dmp

Filesize
10.8MB

Download
memory/1488-30-0x00007FFEFBA40000-0x00007FFEFC502000-memory.dmp

Filesize
10.8MB

Download
memory/1488-27-0x0000000000840000-0x000000000087E000-memory.dmp

Filesize
248KB

Download
memory/1488-59-0x00007FFEFBA40000-0x00007FFEFC502000-memory.dmp

Filesize
10.8MB

Download
memory/2156-39-0x000001E757880000-0x000001E7578A2000-memory.dmp

Filesize
136KB

Download
memory/2376-65-0x000000001B940000-0x000000001B996000-memory.dmp

Filesize
344KB

Download
memory/3612-29-0x00007FFEFBA40000-0x00007FFEFC502000-memory.dmp

Filesize
10.8MB

Download
memory/3612-0-0x00007FFEFBA43000-0x00007FFEFBA45000-memory.dmp

Filesize
8KB

Download
memory/3612-3-0x00007FFEFBA40000-0x00007FFEFC502000-memory.dmp

Filesize
10.8MB

Download
memory/3612-1-0x0000000000D20000-0x0000000000DA2000-memory.dmp

Filesize
520KB

Download

Analysis

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