stormkitty | 547f08253c97d96ab2fe80b49b6de98d577305078cd6c6efe71fbac431799ceb

General

Target

VC_Redist64.exe
Size

24.5MB
MD5

f38e121d7029527a7becac8a54e1e5c6
SHA1

edd4ec14a08324d6cc74f24670a0bffa98872496
SHA256

547f08253c97d96ab2fe80b49b6de98d577305078cd6c6efe71fbac431799ceb
SHA512

a007ce71b5664cfa40dfb469df28977101100f0a48eda9feef5f6f24a6594511dac8ca40afdc0d365e8982bad2bedd31b898bb69d3e962484fccab648eff8481
SSDEEP

393216:I+TzxoRXwQSqd/jVKsg9PtWzUXil6OAoZzbMMTv70FkqQUl086iWG0wL5B0fxZVw:I++lSWJKh6civoETQ7bl9WGuxU+mb1

Score

10^/10

stormkitty xworm discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

C2

tranny.racoongang.com:3389

174.89.155.190:3389

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4704-24-0x00000000009F0000-0x0000000000A0A000-memory.dmp	family_xworm
behavioral2/files/0x0007000000023ca9-23.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/4704-79-0x00000000208F0000-0x0000000020A10000-memory.dmp	family_stormkitty

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

Checks computer location settings 2 TTPs 3 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	VC_Redist64.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	svchost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	VC_redist.x64.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 5 IoCs

pid	Process
3440	VC_redist.x64.exe
4704	svchost.exe
1136	VC_redist.x64.exe
5048	svchost.exe
4716	VC_redist.x64.exe

Loads dropped DLL 1 IoCs

pid	Process
1136	VC_redist.x64.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 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\{804e7d66-ccc2-4c12-84ba-476da31d103d} = "\"C:\\ProgramData\\Package Cache\\{804e7d66-ccc2-4c12-84ba-476da31d103d}\\VC_redist.x64.exe\" /burn.runonce"	VC_redist.x64.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

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
13	ip-api.com

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

System Location Discovery: System Language Discovery 1 TTPs 3 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	VC_redist.x64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VC_redist.x64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VC_redist.x64.exe

Checks SCSI registry key(s) 3 TTPs 5 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr	vssvc.exe
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\PartitionTableCache = 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	vssvc.exe
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\SnapshotDataCache = 534e41505041525401000000700000008ec7416a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	vssvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters	vssvc.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters	vssvc.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3140	timeout.exe

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
336	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4704	svchost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4704	svchost.exe

Suspicious use of AdjustPrivilegeToken 14 IoCs

description	pid	Process
Token: SeDebugPrivilege	4704	svchost.exe
Token: SeDebugPrivilege	4704	svchost.exe
Token: SeDebugPrivilege	5048	svchost.exe
Token: SeBackupPrivilege	216	vssvc.exe
Token: SeRestorePrivilege	216	vssvc.exe
Token: SeAuditPrivilege	216	vssvc.exe
Token: SeBackupPrivilege	3788	srtasks.exe
Token: SeRestorePrivilege	3788	srtasks.exe
Token: SeSecurityPrivilege	3788	srtasks.exe
Token: SeTakeOwnershipPrivilege	3788	srtasks.exe
Token: SeBackupPrivilege	3788	srtasks.exe
Token: SeRestorePrivilege	3788	srtasks.exe
Token: SeSecurityPrivilege	3788	srtasks.exe
Token: SeTakeOwnershipPrivilege	3788	srtasks.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
1136	VC_redist.x64.exe
1136	VC_redist.x64.exe
1136	VC_redist.x64.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4704	svchost.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 3440	2848	VC_Redist64.exe	82
PID 2848 wrote to memory of 3440	2848	VC_Redist64.exe	82
PID 2848 wrote to memory of 3440	2848	VC_Redist64.exe	82
PID 2848 wrote to memory of 4704	2848	VC_Redist64.exe	83
PID 2848 wrote to memory of 4704	2848	VC_Redist64.exe	83
PID 3440 wrote to memory of 1136	3440	VC_redist.x64.exe	84
PID 3440 wrote to memory of 1136	3440	VC_redist.x64.exe	84
PID 3440 wrote to memory of 1136	3440	VC_redist.x64.exe	84
PID 4704 wrote to memory of 336	4704	svchost.exe	86
PID 4704 wrote to memory of 336	4704	svchost.exe	86
PID 1136 wrote to memory of 4716	1136	VC_redist.x64.exe	98
PID 1136 wrote to memory of 4716	1136	VC_redist.x64.exe	98
PID 1136 wrote to memory of 4716	1136	VC_redist.x64.exe	98
PID 4704 wrote to memory of 4572	4704	svchost.exe	105
PID 4704 wrote to memory of 4572	4704	svchost.exe	105
PID 4704 wrote to memory of 1444	4704	svchost.exe	107
PID 4704 wrote to memory of 1444	4704	svchost.exe	107
PID 1444 wrote to memory of 3140	1444	cmd.exe	109
PID 1444 wrote to memory of 3140	1444	cmd.exe	109

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\VC_Redist64.exe
"C:\Users\Admin\AppData\Local\Temp\VC_Redist64.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Users\Admin\AppData\Roaming\VC_redist.x64.exe
  "C:\Users\Admin\AppData\Roaming\VC_redist.x64.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3440
- - C:\Windows\Temp\{34557819-2AEB-4D85-86B9-A5977A721A52}\.cr\VC_redist.x64.exe
    "C:\Windows\Temp\{34557819-2AEB-4D85-86B9-A5977A721A52}\.cr\VC_redist.x64.exe" -burn.clean.room="C:\Users\Admin\AppData\Roaming\VC_redist.x64.exe" -burn.filehandle.attached=660 -burn.filehandle.self=692
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of WriteProcessMemory
    PID:1136
  - - C:\Windows\Temp\{C6D08C18-D935-4BE9-9119-0590D579A9A8}\.be\VC_redist.x64.exe
      "C:\Windows\Temp\{C6D08C18-D935-4BE9-9119-0590D579A9A8}\.be\VC_redist.x64.exe" -q -burn.elevated BurnPipe.{B0F2AE8F-66B3-4688-8532-7A4595A5F1D8} {4B7EDFBE-2A8C-4D38-A3CB-EA792AD1272D} 1136
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:4716
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - 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:4704
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:336
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
    3⤵
    PID:4572
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp66C0.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1444
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:3140

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5048

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Checks SCSI registry key(s)
- Suspicious use of AdjustPrivilegeToken
PID:216

C:\Windows\system32\srtasks.exe
C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3788

C:\Windows\system32\srtasks.exe
C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:3
1⤵
PID:3080

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

1

T1217

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

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\svchost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp66C0.tmp.bat

Filesize
156B

MD5
031cbf4a77d647affa7e06034baf4e7d

SHA1
cc22bb694c9c97aa45c81381d2ac0613edfda3a6

SHA256
50cdca957469c7cc3429785f9f7eea110ded2e53820a6a0493c0bbfac577b707

SHA512
9c0f39f6b36ee67ebb75dd38f31eb041f891eb56e51143746d52af69ddf9be4e4a6abc7cdbee4a5483bce2f73686f34c04414ad15c92f02a6bb6458532a7830d

Download Submit
C:\Users\Admin\AppData\Roaming\VC_redist.x64.exe

Filesize
24.5MB

MD5
223a76cd5ab9e42a5c55731154b85627

SHA1
38b647d37b42378222856972a1e22fbd8cf4b404

SHA256
1821577409c35b2b9505ac833e246376cc68a8262972100444010b57226f0940

SHA512
20e2d7437367cb262ce45184eb4d809249fe654aa450d226e376d4057c00b58ecfd8834a8b5153eb148960ffc845bed1f0943d5ff9a6fc1355b1503138562d8d

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

Filesize
77KB

MD5
9b06381f19f780f5df2229f672733783

SHA1
5f6163c1b0d4f9efb8e286194edbe4b07128b62d

SHA256
2678cd38a5aa24d85380baf37745ef144fff318463cad17cb6fd93b4e445a826

SHA512
716c30d427f903c5e76dfc1c0b00ffb9ac9604e43df768c77d55a3c1537078381634f210ab183a9f3a3157a570257a0025896e4232ea5272ca4d934647a66220

Download Submit
C:\Windows\Temp\{34557819-2AEB-4D85-86B9-A5977A721A52}\.cr\VC_redist.x64.exe

Filesize
670KB

MD5
3f32f1a9bd60ae065b89c2223676592e

SHA1
9d386d394db87f1ee41252cac863c80f1c8d6b8b

SHA256
270fa05033b8b9455bd0d38924b1f1f3e4d3e32565da263209d1f9698effbc05

SHA512
bddfeab33a03b0f37cff9008815e2900cc96bddaf763007e5f7fdffd80e56719b81341029431bd9d25c8e74123c1d9cda0f2aefafdc4937095d595093db823df

Download Submit
C:\Windows\Temp\{C6D08C18-D935-4BE9-9119-0590D579A9A8}\.ba\logo.png

Filesize
1KB

MD5
d6bd210f227442b3362493d046cea233

SHA1
ff286ac8370fc655aea0ef35e9cf0bfcb6d698de

SHA256
335a256d4779ec5dcf283d007fb56fd8211bbcaf47dcd70fe60ded6a112744ef

SHA512
464aaab9e08de610ad34b97d4076e92dc04c2cdc6669f60bfc50f0f9ce5d71c31b8943bd84cee1a04fb9ab5bbed3442bd41d9cb21a0dd170ea97c463e1ce2b5b

Download Submit
C:\Windows\Temp\{C6D08C18-D935-4BE9-9119-0590D579A9A8}\.ba\wixstdba.dll

Filesize
215KB

MD5
f68f43f809840328f4e993a54b0d5e62

SHA1
01da48ce6c81df4835b4c2eca7e1d447be893d39

SHA256
e921f69b9fb4b5ad4691809d06896c5f1d655ab75e0ce94a372319c243c56d4e

SHA512
a7a799ecf1784fb5e8cd7191bf78b510ff5b07db07363388d7b32ed21f4fddc09e34d1160113395f728c0f4e57d13768a0350dbdb207d9224337d2153dc791e1

Download Submit
memory/2848-0-0x00007FFF17D33000-0x00007FFF17D35000-memory.dmp

Filesize
8KB

Download
memory/2848-1-0x0000000000AF0000-0x0000000002380000-memory.dmp

Filesize
24.6MB

Download
memory/4704-26-0x00007FFF17D30000-0x00007FFF187F1000-memory.dmp

Filesize
10.8MB

Download
memory/4704-75-0x00007FFF17D30000-0x00007FFF187F1000-memory.dmp

Filesize
10.8MB

Download
memory/4704-78-0x0000000020100000-0x0000000020450000-memory.dmp

Filesize
3.3MB

Download
memory/4704-79-0x00000000208F0000-0x0000000020A10000-memory.dmp

Filesize
1.1MB

Download
memory/4704-118-0x000000001FDD0000-0x000000001FDF2000-memory.dmp

Filesize
136KB

Download
memory/4704-119-0x000000001BD40000-0x000000001BD4C000-memory.dmp

Filesize
48KB

Download
memory/4704-24-0x00000000009F0000-0x0000000000A0A000-memory.dmp

Filesize
104KB

Download
memory/4704-136-0x00007FFF17D30000-0x00007FFF187F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads