stormkitty | 4d42a51d71daae6e4fcf09e5030cce2f9d220a0d4106fca7e0bee974b0fbff0c

General

Target

SilverClient.exe
Size

37KB
MD5

776fac12ea695a8f220fc086ac25be69
SHA1

dd90c8b3f18da5c7791a0a1d023fc829e8e6fc71
SHA256

4d42a51d71daae6e4fcf09e5030cce2f9d220a0d4106fca7e0bee974b0fbff0c
SHA512

d6c468d337013025106913092a3c1863acdcdcd1811e5caf6327ab06538cbbf193f1354e836e41495a0dcbc1fd049478765bfdfb39ecb586750452e7dacd7b73
SSDEEP

768:z98X+6AlPNHIcSHLgBaRJGw9I9YB6SPMTtvsGvJE:x8Xhj5j93ofTtUGvJE

Score

10^/10

stormkitty discovery 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/416-28-0x000000001E890000-0x000000001E8BA000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Downloads MZ/PE file 1 IoCs

flow	pid	Process
38	1808	Process not Found

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-1-5-21-156903528-2922517348-1168185335-1000\Control Panel\International\Geo\Nation	$77Discord.exe

Executes dropped EXE 1 IoCs

pid	Process
416	$77Discord.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2140	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
8	discord.com
9	discord.com

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 1 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	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1112	MicrosoftEdgeUpdate.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2704	timeout.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
3620	SilverClient.exe
2140	powershell.exe
2140	powershell.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeDebugPrivilege	3620	SilverClient.exe
Token: SeDebugPrivilege	416	$77Discord.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeIncreaseQuotaPrivilege	2140	powershell.exe
Token: SeSecurityPrivilege	2140	powershell.exe
Token: SeTakeOwnershipPrivilege	2140	powershell.exe
Token: SeLoadDriverPrivilege	2140	powershell.exe
Token: SeSystemProfilePrivilege	2140	powershell.exe
Token: SeSystemtimePrivilege	2140	powershell.exe
Token: SeProfSingleProcessPrivilege	2140	powershell.exe
Token: SeIncBasePriorityPrivilege	2140	powershell.exe
Token: SeCreatePagefilePrivilege	2140	powershell.exe
Token: SeBackupPrivilege	2140	powershell.exe
Token: SeRestorePrivilege	2140	powershell.exe
Token: SeShutdownPrivilege	2140	powershell.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeSystemEnvironmentPrivilege	2140	powershell.exe
Token: SeRemoteShutdownPrivilege	2140	powershell.exe
Token: SeUndockPrivilege	2140	powershell.exe
Token: SeManageVolumePrivilege	2140	powershell.exe
Token: 33	2140	powershell.exe
Token: 34	2140	powershell.exe
Token: 35	2140	powershell.exe
Token: 36	2140	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3620 wrote to memory of 1488	3620	SilverClient.exe	84
PID 3620 wrote to memory of 1488	3620	SilverClient.exe	84
PID 1488 wrote to memory of 2704	1488	cmd.exe	86
PID 1488 wrote to memory of 2704	1488	cmd.exe	86
PID 1488 wrote to memory of 416	1488	cmd.exe	88
PID 1488 wrote to memory of 416	1488	cmd.exe	88
PID 416 wrote to memory of 2140	416	$77Discord.exe	89
PID 416 wrote to memory of 2140	416	$77Discord.exe	89

C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3620
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8E75.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1488
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2704
- - C:\Users\Admin\Discord\$77Discord.exe
    "C:\Users\Admin\Discord\$77Discord.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:416
  - - 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:2140

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-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
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1112

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

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pnmxcjpp.d0u.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8E75.tmp.bat

Filesize
146B

MD5
fdc919b3fb3ac306bc22500fa4124dcc

SHA1
0498cd25415bcfe1136e6e68eb0c2a6e141443d5

SHA256
718a3ef26a8f1ef6453e589cdf3537c6fdfa6a16442cee8f63b708bc9c0946a0

SHA512
2060cdb94d657d214be4f7b498d2543fd8b59f2390572dab1d0c0eb8ac67474dcd4d1c01fc15bd83bb211b8857ce7e7f23353034ff25f5cd280ce4de4afadce0

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

Filesize
37KB

MD5
776fac12ea695a8f220fc086ac25be69

SHA1
dd90c8b3f18da5c7791a0a1d023fc829e8e6fc71

SHA256
4d42a51d71daae6e4fcf09e5030cce2f9d220a0d4106fca7e0bee974b0fbff0c

SHA512
d6c468d337013025106913092a3c1863acdcdcd1811e5caf6327ab06538cbbf193f1354e836e41495a0dcbc1fd049478765bfdfb39ecb586750452e7dacd7b73

Download Submit
memory/416-12-0x00007FFC95440000-0x00007FFC95F02000-memory.dmp

Filesize
10.8MB

Download
memory/416-13-0x00007FFC95440000-0x00007FFC95F02000-memory.dmp

Filesize
10.8MB

Download
memory/416-26-0x00007FFC95440000-0x00007FFC95F02000-memory.dmp

Filesize
10.8MB

Download
memory/416-28-0x000000001E890000-0x000000001E8BA000-memory.dmp

Filesize
168KB

Download
memory/2140-23-0x0000022FF51A0000-0x0000022FF51C2000-memory.dmp

Filesize
136KB

Download
memory/3620-0-0x00007FFC95A23000-0x00007FFC95A25000-memory.dmp

Filesize
8KB

Download
memory/3620-1-0x0000000000150000-0x000000000015E000-memory.dmp

Filesize
56KB

Download
memory/3620-2-0x00007FFC95A20000-0x00007FFC964E2000-memory.dmp

Filesize
10.8MB

Download
memory/3620-8-0x00007FFC95A20000-0x00007FFC964E2000-memory.dmp

Filesize
10.8MB

Download

Analysis

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