stormkitty | 01dc20c640b1a5d41354f57e06b324ff2a5753cd1ef98c5f5773c5475284e27d

General

Target

bc7EKCf.exe
Size

2.9MB
MD5

c042e73bc713b483058772dabf080733
SHA1

06f64d679249be4d555fc81e495b871b09b98976
SHA256

01dc20c640b1a5d41354f57e06b324ff2a5753cd1ef98c5f5773c5475284e27d
SHA512

a019c0fa3dd6f179fe748a33aa4f5e62197b232cadca5b481fbb75688ec81dd1b78c7ddd3e64744f7ffca6b578a26382b66ca3982e394b1c61412193c1eaf98f
SSDEEP

49152:XTPo/58bWNrFMnwfHvo1FyeOhJG0BNpBtDmMT2N1a3wc2zmHayHNABEc4v0OqMPE:XzoBG+FMwfP6FyTiipHaMT2ukAtUFL4J

Score

10^/10

stormkitty discovery stealer

Malware Config

Signatures

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

StormKitty payload 5 IoCs

resource	yara_rule
behavioral1/memory/2856-12-0x0000000000400000-0x0000000000694000-memory.dmp	family_stormkitty
behavioral1/memory/2856-15-0x0000000000400000-0x0000000000694000-memory.dmp	family_stormkitty
behavioral1/memory/2856-8-0x0000000000400000-0x0000000000694000-memory.dmp	family_stormkitty
behavioral1/memory/2856-6-0x0000000000400000-0x0000000000694000-memory.dmp	family_stormkitty
behavioral1/memory/2856-19-0x0000000000400000-0x0000000000694000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Deletes itself 1 IoCs

pid	Process
2792	cmd.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk 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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	bc7EKCf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	bc7EKCf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2772 set thread context of 2856	2772	bc7EKCf.exe	31

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 6 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bc7EKCf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bc7EKCf.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2944	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
692	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2856	bc7EKCf.exe
2772	bc7EKCf.exe
2772	bc7EKCf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2772	bc7EKCf.exe
Token: SeDebugPrivilege	2856	bc7EKCf.exe
Token: SeDebugPrivilege	692	taskkill.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2772 wrote to memory of 2856	2772	bc7EKCf.exe	31
PID 2856 wrote to memory of 2792	2856	bc7EKCf.exe	32
PID 2856 wrote to memory of 2792	2856	bc7EKCf.exe	32
PID 2856 wrote to memory of 2792	2856	bc7EKCf.exe	32
PID 2856 wrote to memory of 2792	2856	bc7EKCf.exe	32
PID 2792 wrote to memory of 2860	2792	cmd.exe	34
PID 2792 wrote to memory of 2860	2792	cmd.exe	34
PID 2792 wrote to memory of 2860	2792	cmd.exe	34
PID 2792 wrote to memory of 2860	2792	cmd.exe	34
PID 2792 wrote to memory of 692	2792	cmd.exe	35
PID 2792 wrote to memory of 692	2792	cmd.exe	35
PID 2792 wrote to memory of 692	2792	cmd.exe	35
PID 2792 wrote to memory of 692	2792	cmd.exe	35
PID 2792 wrote to memory of 2944	2792	cmd.exe	36
PID 2792 wrote to memory of 2944	2792	cmd.exe	36
PID 2792 wrote to memory of 2944	2792	cmd.exe	36
PID 2792 wrote to memory of 2944	2792	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\bc7EKCf.exe
"C:\Users\Admin\AppData\Local\Temp\bc7EKCf.exe"
1⤵
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2772
- C:\Users\Admin\AppData\Local\Temp\bc7EKCf.exe
  "C:\Users\Admin\AppData\Local\Temp\bc7EKCf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2856
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\tmp30A2.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmp30A2.tmp.bat"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2792
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2860
  - - C:\Windows\SysWOW64\taskkill.exe
      TaskKill /F /PID 2856
      4⤵
      System Location Discovery: System Language Discovery
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:692
  - - C:\Windows\SysWOW64\timeout.exe
      Timeout /T 2 /Nobreak
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp30A2.tmp.bat

Filesize
115B

MD5
2c2d943444e3bfbccf162b1a369c066d

SHA1
339d385faed1581080c33fd50ebee5044685e7d2

SHA256
d40c7069bc725edc000660e00dcd741388cc2ab76cc509c3f407886d766acb5d

SHA512
3d591655a878fd09e658942c5e31cf444a8501757e0f5a352dc8da0fc33e4247770c7ce39589db0c073782b72b8cb4dd6d742437f5248d162e1882676368eae6

Download Submit
memory/2772-0-0x00000000745CE000-0x00000000745CF000-memory.dmp

Filesize
4KB

Download
memory/2772-1-0x0000000000A20000-0x0000000000D0A000-memory.dmp

Filesize
2.9MB

Download
memory/2772-2-0x00000000745C0000-0x0000000074CAE000-memory.dmp

Filesize
6.9MB

Download
memory/2772-3-0x0000000000960000-0x000000000097A000-memory.dmp

Filesize
104KB

Download
memory/2772-25-0x00000000745C0000-0x0000000074CAE000-memory.dmp

Filesize
6.9MB

Download
memory/2772-24-0x00000000745CE000-0x00000000745CF000-memory.dmp

Filesize
4KB

Download
memory/2772-13-0x00000000745C0000-0x0000000074CAE000-memory.dmp

Filesize
6.9MB

Download
memory/2856-6-0x0000000000400000-0x0000000000694000-memory.dmp

Filesize
2.6MB

Download
memory/2856-21-0x00000000008F0000-0x0000000000900000-memory.dmp

Filesize
64KB

Download
memory/2856-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2856-5-0x0000000000400000-0x0000000000694000-memory.dmp

Filesize
2.6MB

Download
memory/2856-4-0x0000000000400000-0x0000000000694000-memory.dmp

Filesize
2.6MB

Download
memory/2856-19-0x0000000000400000-0x0000000000694000-memory.dmp

Filesize
2.6MB

Download
memory/2856-22-0x00000000745C0000-0x0000000074CAE000-memory.dmp

Filesize
6.9MB

Download
memory/2856-8-0x0000000000400000-0x0000000000694000-memory.dmp

Filesize
2.6MB

Download
memory/2856-20-0x00000000003F0000-0x00000000003FA000-memory.dmp

Filesize
40KB

Download
memory/2856-23-0x0000000000950000-0x0000000000958000-memory.dmp

Filesize
32KB

Download
memory/2856-15-0x0000000000400000-0x0000000000694000-memory.dmp

Filesize
2.6MB

Download
memory/2856-18-0x00000000745C0000-0x0000000074CAE000-memory.dmp

Filesize
6.9MB

Download
memory/2856-26-0x00000000745C0000-0x0000000074CAE000-memory.dmp

Filesize
6.9MB

Download
memory/2856-12-0x0000000000400000-0x0000000000694000-memory.dmp

Filesize
2.6MB

Download
memory/2856-29-0x00000000745C0000-0x0000000074CAE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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