fcfffe3a1a9c28e98e075120e5e5faf74485a8cd7fdb25ad25ec7b5c0fe1ee62

Analysis

max time kernel
6s
max time network
4s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 12:39

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Reason

Machine shutdown

General

Target
2024-06-08_b43487f598690b9d1514ce057542232c_ryuk.exe
Size 7.2MB
Sample240608-pvr36acf28
SHA256 fcfffe3a1a9c28e98e075120e5e5faf74485a8cd7fdb25ad25ec7b5c0fe1ee62
MD5 b43487f598690b9d1514ce057542232c
SHA1 43618e37a8495e66f78f2e53ceb1f5781fb66110
SHA512 d08253fcaa22f8b6900eace1221483711ddefad49416421c3de1e45e3e3b28f7ea93b6e93847ec15fe636aaad30c44b01324a2479fcdb57ed17f642d1acaa3f9
SSDEEP 196608:gmFKAsPZYyoe+rmXiHDcEJMFI3ttHhY3VP4n/:M5PZxoe+yXECFIt3gP4n/
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

pyinstaller

Malware Config

Signatures

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-06-08_b43487f598690b9d1514ce057542232c_ryuk.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4296	installer.exe
1056	installer.exe

Loads dropped DLL 2 IoCs

pid	Process
1056	installer.exe
1056	installer.exe

Detects Pyinstaller 1 IoCs

pyinstaller

resource	yara_rule
behavioral2/files/0x0007000000023403-7.dat	pyinstaller

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4820	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4580	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4580	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 3156	4808	2024-06-08_b43487f598690b9d1514ce057542232c_ryuk.exe	82
PID 4808 wrote to memory of 3156	4808	2024-06-08_b43487f598690b9d1514ce057542232c_ryuk.exe	82
PID 3156 wrote to memory of 4820	3156	cmd.exe	85
PID 3156 wrote to memory of 4820	3156	cmd.exe	85
PID 3156 wrote to memory of 4296	3156	cmd.exe	94
PID 3156 wrote to memory of 4296	3156	cmd.exe	94
PID 4296 wrote to memory of 1056	4296	installer.exe	95
PID 4296 wrote to memory of 1056	4296	installer.exe	95
PID 1056 wrote to memory of 1600	1056	installer.exe	96
PID 1056 wrote to memory of 1600	1056	installer.exe	96
PID 1600 wrote to memory of 4580	1600	cmd.exe	98
PID 1600 wrote to memory of 4580	1600	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-06-08_b43487f598690b9d1514ce057542232c_ryuk.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_b43487f598690b9d1514ce057542232c_ryuk.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\installer.bat" "
  2⤵
  - Drops startup file
  - Suspicious use of WriteProcessMemory
  PID:3156
- - C:\Windows\system32\timeout.exe
    timeout /t 5 /nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:4820
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\installer.exe
    "C:\Users\Admin\AppData\Local\Temp\RarSFX0\installer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:4296
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX0\installer.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\installer.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1056
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c taskkill /F /IM svchost.exe
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1600
      - C:\Windows\system32\taskkill.exe
        
        taskkill /F /IM svchost.exe
        6⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

installer.bat

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\installer.bat
Size 412B
SHA256 55d46545cd4f95f821873ed9f9b7e6605efdd582732333f51caf31c5d5b0476c
MD5 21d946af8a8788e38acbacfc03a26050
SHA1 94185a3fdecb171a3b7068a299a61783d8f756df
SHA512 19a4444a3f0e497faa692ac1cd5388c7d7820fcb4d1a2b17b7fbb737e0d9addc6bcd3d3b64cecc2858312e89b54a6962c8eeb57311df571bd05b738d4f49df85
MD5 SHA1 SHA512

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installer.exe

Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\installer.exe
Size 7.0MB
SHA256 0f3e824e52da9830f72c5cbb852a13ff8f2ddf146e0f9d37570bc154cd03d9fc
MD5 59f459a593e67129e598e00a51485252
SHA1 e79fdf6e148267db557905154894380f0106b0cb
SHA512 8ff9fb66d8cb373d920382082233eb4a0f5a813447766d646454b67fe06887b1e2485294da55ada15a47bd3d6f8328830f9da8afd7183d48f359ab784e48eb54
SSDEEP 196608:ZG7YzA1HeT39IigjvKub75bcjWgbkzfPSkjU38p:M1+TtIiavB5IjWqkzf
MD5 SHA1 SHA512 SSDEEP

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VCRUNTIME140.dll

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\VCRUNTIME140.dll
Size 116KB
SHA256 4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83
MD5 be8dbe2dc77ebe7f88f910c61aec691a
SHA1 a19f08bb2b1c1de5bb61daf9f2304531321e0e40
SHA512 0da644472b374f1da449a06623983d0477405b5229e386accadb154b43b8b083ee89f07c3f04d2c0c7501ead99ad95aecaa5873ff34c5eeb833285b598d5a655
SSDEEP 1536:+qvQ1Dj2DkX7OcujarvmdlYNABCmgrP4ddbkZIecbWcFML/UXzlghzdMFw84hzk:+qvQ1D2CreiABCmgYecbWVLUD6h+b4ho
MD5 SHA1 SHA512 SSDEEP

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_bz2.pyd

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\_bz2.pyd
Size 82KB
SHA256 706d4a0c26dd454538926cbb2ff6c64257c3d9bd48c956f7cabd6def36ffd13e
MD5 59d60a559c23202beb622021af29e8a9
SHA1 a405f23916833f1b882f37bdbba2dd799f93ea32
SHA512 2f60e79603cf456b2a14b8254cec75ce8be0a28d55a874d4fb23d92d63bbe781ed823ab0f4d13a23dc60c4df505cbf1dbe1a0a2049b02e4bdec8d374898002b1
SSDEEP 1536:RS7z7Sj2u5in5IVfC83zYxzbdK87kW1IACVw7SyrxX:I7z+jum3MJdN7kW1IACVwX
MD5 SHA1 SHA512 SSDEEP

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_decimal.pyd

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\_decimal.pyd
Size 246KB
SHA256 3b9ad1d2bc9ec03d37da86135853dac73b3fe851b164fe52265564a81eb8c544
MD5 f930b7550574446a015bc602d59b0948
SHA1 4ee6ff8019c6c540525bdd2790fc76385cdd6186
SHA512 10b864975945d6504433554f9ff11b47218caa00f809c6bce00f9e4089b862190a4219f659697a4ba5e5c21edbe1d8d325950921e09371acc4410469bd9189ee
SSDEEP 6144:Agvd9YyMipyD41q8xDiw9qWM53pLW1AQRRRrBoZtcr3:AQ8yryD47hix4orcr3
MD5 SHA1 SHA512 SSDEEP

Submit Download

_hashlib.pyd

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\_hashlib.pyd
Size 64KB
SHA256 4adfbbd6366d9b55d902fc54d2b42e7c8c989a83016ed707bd7a302fc3fc7b67
MD5 b0262bd89a59a3699bfa75c4dcc3ee06
SHA1 eb658849c646a26572dea7f6bfc042cb62fb49dc
SHA512 2e4b214de3b306e3a16124af434ff8f5ab832aa3eeb1aa0aa9b49b0ada0928dcbb05c57909292fbe3b01126f4cd3fe0dac9cc15eaea5f3844d6e267865b9f7b1
SSDEEP 1536:MElYij3wz91lBafLEmIRhtIAOIW7SybpxC:hYZBaTEmghtIAOIWE
MD5 SHA1 SHA512 SSDEEP

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_lzma.pyd

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\_lzma.pyd
Size 155KB
SHA256 6216173194b29875e84963cd4dc4752f7ca9493f5b1fd7e4130ca0e411c8ac6a
MD5 b71dbe0f137ffbda6c3a89d5bcbf1017
SHA1 a2e2bdc40fdb83cc625c5b5e8a336ca3f0c29c5f
SHA512 9a5c7b1e25d8e1b5738f01aedfd468c1837f1ac8dd4a5b1d24ce86dcae0db1c5b20f2ff4280960bc523aee70b71db54fd515047cdaf10d21a8bec3ebd6663358
SSDEEP 3072:Fik7me1FFD+znfF9mNo+Mu6tmxzE41IAZ1Ak:FikSiUNYO+J1E4b
MD5 SHA1 SHA512 SSDEEP

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_socket.pyd

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\_socket.pyd
Size 81KB
SHA256 5cc62aac52edf87916deb4ebbad9abb58a6a3565b32e7544f672aca305c38027
MD5 9c6283cc17f9d86106b706ec4ea77356
SHA1 af4f2f52ce6122f340e5ea1f021f98b1ffd6d5b6
SHA512 11fd6f570dd78f8ff00be645e47472a96daffa3253e8bd29183bccde3f0746f7e436a106e9a68c57cc05b80a112365441d06cc719d51c906703b428a32c93124
SSDEEP 1536:MUuhDLiJfz76Xl+1ly+uCt9/s+S+pzcHS58/n1IsJHfsZIALwqw7Syraxi:MU6DL4fHdy+uCt9/sT+pzuSQ1IwHfsZS
MD5 SHA1 SHA512 SSDEEP

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base_library.zip

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\base_library.zip
Size 1.3MB
SHA256 9f15fed288e8437df3c0b13c7ca382a29eb7310f6fc9b49435c737f34ac182d4
MD5 db4a3e83828ab1d62ac24e8505274541
SHA1 47679655a3be0ff97f14daa1a30a1ce09944a6d4
SHA512 97dec2a90fc63ff3d45c3b6827c185a432930ab1c48bcd2ccc61c69dec7b539d26179d345fa5b032df6967ffa3c9563ef8d27467ca40eb56bc51ce2e0105e147
SSDEEP 12288:uttcY+bStOmgRF1+fYNXPh26UZWAzau7joqYnhjHgkVHdmmPcHz1dG6sF7aYceZ:uttcY+UHCiaAd+cqHdmmPmzvwaYceZ
MD5 SHA1 SHA512 SSDEEP

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libcrypto-3.dll

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\libcrypto-3.dll
Size 5.0MB
SHA256 05fe080eab7fc535c51e10c1bd76a2f3e6217f9c91a25034774588881c3f99de
MD5 e547cf6d296a88f5b1c352c116df7c0c
SHA1 cafa14e0367f7c13ad140fd556f10f320a039783
SHA512 9f42edf04c7af350a00fa4fdf92b8e2e6f47ab9d2d41491985b20cd0adde4f694253399f6a88f4bdd765c4f49792f25fb01e84ec03fd5d0be8bb61773d77d74d
SSDEEP 98304:n3+pefu6fSar+SJ8aqfPomg1CPwDvt3uFlDCE:3G+u6fb+SJ8aqfwmg1CPwDvt3uFlDCE
MD5 SHA1 SHA512 SSDEEP

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python312.dll

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\python312.dll
Size 6.7MB
SHA256 789a42ac160cef98f8925cb347473eeeb4e70f5513242e7faba5139ba06edf2d
MD5 550288a078dffc3430c08da888e70810
SHA1 01b1d31f37fb3fd81d893cc5e4a258e976f5884f
SHA512 7244432fc3716f7ef27630d4e8fbc8180a2542aa97a01d44dca260ab43966dd8ac98b6023400b0478a4809aace1a128f1f4d6e544f2e591a5b436fd4c8a9d723
SSDEEP 49152:mz0oCxOqKWneF3o1VLCClOTNRpaOviXEYWyb3eOYTvuFsx/iac84YNFXiTlv5WF4:mooCcqKLHX+az2Ro8Kv7HDMiEB/
MD5 SHA1 SHA512 SSDEEP

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select.pyd

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\select.pyd
Size 29KB
SHA256 af358285a7450de6e2e5e7ff074f964d6a257fb41d9eb750146e03c7dda503ca
MD5 8a273f518973801f3c63d92ad726ec03
SHA1 069fc26b9bd0f6ea3f9b3821ad7c812fd94b021f
SHA512 7fedae0573ecb3946ede7d0b809a98acad3d4c95d6c531a40e51a31bdb035badc9f416d8aaa26463784ff2c5e7a0cc2c793d62b5fdb2b8e9fad357f93d3a65f8
SSDEEP 384:b9yLTFInPLnIdHqp3DT90IZIAQGyHQIYiSy1pCQ273bAM+o/8E9VF0Nypyn4:6inzUHqN1rZIAQGo5YiSyvUrAMxkEjh
MD5 SHA1 SHA512 SSDEEP

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unicodedata.pyd

Path C:\Users\Admin\AppData\Local\Temp\_MEI42962\unicodedata.pyd
Size 1.1MB
SHA256 be942308d99cc954931fe6f48ed8cc7a57891ccbe99aae728121bcda1fd929ab
MD5 04f35d7eec1f6b72bab9daf330fd0d6b
SHA1 ecf0c25ba7adf7624109e2720f2b5930cd2dba65
SHA512 3da405e4c1371f4b265e744229dcc149491a112a2b7ea8e518d5945f8c259cad15583f25592b35ec8a344e43007ae00da9673822635ee734d32664f65c9c8d9b
SSDEEP 12288:hrEHdcM6hbFCjJ43w9hIpCQvb0QN8MdIEQ+U2BNNmD+99FfciFt:hrEXYCjfk7bPNfv42BN6yzUiFt
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads