gh0strat | 36f13661f39c9bff3e4fd6be7a5f0f951b0d4db23b8114fb1b84871d76efa11b

General

Target

MSUpdates.exe
Size

97KB
MD5

c30111e3592bf03a022b6369c110ad7f
SHA1

f7f57137a029457f132ae63c1b41eac24ac21524
SHA256

239eee98bbcc692f13bffb4d01eb5588b69c75c3e97587f428ca6042d53fb573
SHA512

31df97aba34d102b6b07594fd91966a5120a6a320dbec5bc34c8d4480261891a082ede96be2cd850c5ce0fab1c17a502e4f33d64731f571a15932d84708e0dd2
SSDEEP

1536:bXMujB//+wHnOcWnl5SZ2gcUNEr8JiPZkoo45Ddcq+gQV/caiCj:b8udHPHGlaNJiC+Dcq+gQV1J

Score

10^/10

Malware Config

Signatures

Gh0st RAT payload 1 IoCs

resource	yara_rule
behavioral1/memory/1628-0-0x0000000000330000-0x000000000039E000-memory.dmp	family_gh0strat

Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat
Gh0strat family
gh0strat

Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Active Setup\Installed Components	Explorer.EXE

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\installer\{ac76ba86-7ad7-1033-7b44-a90000000001}\pdffile_8.ico	Explorer.EXE

System Location Discovery: System Language Discovery 1 TTPs 4 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	MSUpdates.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Userinit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	runonce.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BCSSync.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	runonce.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	runonce.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_Classes\Local Settings	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	Explorer.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	Explorer.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1628	MSUpdates.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2036	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE
Token: SeShutdownPrivilege	2036	Explorer.EXE

Suspicious use of FindShellTrayWindow 28 IoCs

pid	Process
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE

Suspicious use of SendNotifyMessage 18 IoCs

pid	Process
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE
2036	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 2912	1628	MSUpdates.exe	30
PID 1628 wrote to memory of 2912	1628	MSUpdates.exe	30
PID 1628 wrote to memory of 2912	1628	MSUpdates.exe	30
PID 1628 wrote to memory of 2912	1628	MSUpdates.exe	30
PID 2912 wrote to memory of 2036	2912	Userinit.exe	31
PID 2912 wrote to memory of 2036	2912	Userinit.exe	31
PID 2912 wrote to memory of 2036	2912	Userinit.exe	31
PID 2912 wrote to memory of 2036	2912	Userinit.exe	31
PID 2036 wrote to memory of 2016	2036	Explorer.EXE	32
PID 2036 wrote to memory of 2016	2036	Explorer.EXE	32
PID 2036 wrote to memory of 2016	2036	Explorer.EXE	32
PID 2036 wrote to memory of 2812	2036	Explorer.EXE	33
PID 2036 wrote to memory of 2812	2036	Explorer.EXE	33
PID 2036 wrote to memory of 2812	2036	Explorer.EXE	33
PID 2036 wrote to memory of 2812	2036	Explorer.EXE	33
PID 2812 wrote to memory of 2784	2812	runonce.exe	35
PID 2812 wrote to memory of 2784	2812	runonce.exe	35
PID 2812 wrote to memory of 2784	2812	runonce.exe	35
PID 2812 wrote to memory of 2784	2812	runonce.exe	35

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

C:\Users\Admin\AppData\Local\Temp\MSUpdates.exe
"C:\Users\Admin\AppData\Local\Temp\MSUpdates.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\SysWOW64\Userinit.exe
  Userinit.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Drops file in Windows directory
    - Modifies registry class
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:2036
  - - C:\Windows\System32\hi5-9c.exe
      "C:\Windows\System32\hi5-9c.exe"
      4⤵
      PID:2016
  - - C:\Windows\SysWOW64\runonce.exe
      C:\Windows\SysWOW64\runonce.exe /Run6432
      4⤵
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious use of WriteProcessMemory
      PID:2812
    - - C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe
        
        "C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe" /DelayServices
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2784

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

Filesize
1KB

MD5
a266bb7dcc38a562631361bbf61dd11b

SHA1
3b1efd3a66ea28b16697394703a72ca340a05bd5

SHA256
df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

SHA512
0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

Filesize
242B

MD5
1e4c1066c85ffa0dc421f4d406af7b78

SHA1
4dad8caae757e13ab6df6be91130fef85652bb16

SHA256
87af01019c35fbab4776741f6b50c2dc40576ba3c1bf0f53dfe05d284b2234d4

SHA512
3b70bd123469d7db23ed08fcc0fcf871b224a933a8321d75aa4d838333f6bc2e6d150968321c96e5cf658835b1b633b8d2701d95d05660010b6d46afc1d421a0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\DUME8XYE\ips138[1].htm

Filesize
162B

MD5
4f8e702cc244ec5d4de32740c0ecbd97

SHA1
3adb1f02d5b6054de0046e367c1d687b6cdf7aff

SHA256
9e17cb15dd75bbbd5dbb984eda674863c3b10ab72613cf8a39a00c3e11a8492a

SHA512
21047fea5269fee75a2a187aa09316519e35068cb2f2f76cfaf371e5224445e9d5c98497bd76fb9608d2b73e9dac1a3f5bfadfdc4623c479d53ecf93d81d3c9f

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabB28F.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarB3BA.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1628-0-0x0000000000330000-0x000000000039E000-memory.dmp

Filesize
440KB

Download
memory/2036-153-0x0000000002580000-0x0000000002590000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads