Analysis Overview
SHA256
027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8
Threat Level: Known bad
The file 027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8 was found to be: Known bad.
Malicious Activity Summary
Modifies WinLogon for persistence
RMS
Executes dropped EXE
UPX packed file
Checks computer location settings
Adds Run key to start application
Drops file in Windows directory
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Runs .reg file with regedit
Suspicious behavior: SetClipboardViewer
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-05-24 14:48
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-05-24 14:48
Reported
2022-05-24 15:30
Platform
win7-20220414-en
Command Line
Signatures
Processes
Network
Files
Analysis: behavioral2
Detonation Overview
Submitted
2022-05-24 14:48
Reported
2022-05-24 15:29
Platform
win10v2004-20220414-en
Max time kernel
150s
Max time network
156s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe" | C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe" | C:\Windows\System64\1rfusclient.exe | N/A |
RMS
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System64\1rfusclient.exe | N/A |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
| N/A | N/A | C:\Windows\System64\rfusclient.exe | N/A |
| N/A | N/A | C:\Windows\System64\rfusclient.exe | N/A |
| N/A | N/A | C:\Windows\System64\rfusclient.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation | C:\Windows\System64\1rfusclient.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows\CurrentVersion\Run | C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rfusclient.exe = "C:\\Windows\\System64\\1rfusclient.exe" | C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows\CurrentVersion\Run | C:\Windows\System64\1rfusclient.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\System64\rfusclient.exe | C:\Windows\System64\1rfusclient.exe | N/A |
| File opened for modification | C:\Windows\System64\rfusclient.exe | C:\Windows\System64\1rfusclient.exe | N/A |
| File created | C:\Windows\System64\vp8decoder.dll | C:\Windows\System64\1rfusclient.exe | N/A |
| File created | C:\Windows\System64\vp8encoder.dll | C:\Windows\System64\1rfusclient.exe | N/A |
| File created | C:\Windows\Zont911\Tupe.bat | C:\Windows\System64\1rfusclient.exe | N/A |
| File opened for modification | C:\Windows\System64\1rfusclient.exe | C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe | N/A |
| File created | C:\Windows\Zont911\Regedit.reg | C:\Windows\System64\1rfusclient.exe | N/A |
| File created | C:\Windows\Zont911\hostbb.zip | C:\Windows\System64\1rfusclient.exe | N/A |
| File opened for modification | C:\Windows\System64\vp8decoder.dll | C:\Windows\System64\1rfusclient.exe | N/A |
| File opened for modification | C:\Windows\System64\vp8encoder.dll | C:\Windows\System64\1rfusclient.exe | N/A |
| File created | C:\Windows\System64\1rfusclient.exe | C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe | N/A |
| File created | C:\Windows\System64\rutserv.exe | C:\Windows\System64\1rfusclient.exe | N/A |
| File opened for modification | C:\Windows\System64\rutserv.exe | C:\Windows\System64\1rfusclient.exe | N/A |
Enumerates physical storage devices
Runs .reg file with regedit
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\regedit.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: SetClipboardViewer
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System64\rfusclient.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\System64\rutserv.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System64\rutserv.exe | N/A |
| Token: SeTakeOwnershipPrivilege | N/A | C:\Windows\System64\rutserv.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\Windows\System64\rutserv.exe | N/A |
| Token: SeTcbPrivilege | N/A | C:\Windows\System64\rutserv.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
| N/A | N/A | C:\Windows\System64\rutserv.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe
"C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe"
C:\Windows\System64\1rfusclient.exe
"C:\Windows\System64\1rfusclient.exe"
C:\Windows\SysWOW64\regedit.exe
"C:\Windows\System32\regedit.exe" /s "C:\Windows\Zont911\Regedit.reg"
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Windows\Zont911\Tupe.bat" "
C:\Windows\SysWOW64\chcp.com
Chcp 1251
C:\Windows\System64\rutserv.exe
"C:\Windows\System64\rutserv.exe" /silentinstall
C:\Windows\System64\rutserv.exe
"C:\Windows\System64\rutserv.exe" /firewall
C:\Windows\System64\rutserv.exe
"C:\Windows\System64\rutserv.exe" /start
C:\Windows\System64\rutserv.exe
C:\Windows\System64\rutserv.exe
C:\Windows\System64\rfusclient.exe
C:\Windows\System64\rfusclient.exe /tray
C:\Windows\System64\rfusclient.exe
C:\Windows\System64\rfusclient.exe
C:\Windows\System64\rfusclient.exe
C:\Windows\System64\rfusclient.exe /tray
Network
| Country | Destination | Domain | Proto |
| FR | 149.202.83.171:5555 | tcp | |
| US | 8.8.8.8:53 | rmansys.ru | udp |
| RU | 31.31.198.18:80 | rmansys.ru | tcp |
| RU | 31.31.198.18:80 | rmansys.ru | tcp |
| US | 8.8.8.8:53 | rms-server.tektonit.ru | udp |
| RU | 95.213.205.83:5655 | rms-server.tektonit.ru | tcp |
| NL | 104.110.191.133:80 | tcp | |
| US | 20.189.173.13:443 | tcp | |
| NL | 104.110.191.133:80 | tcp | |
| NL | 104.110.191.133:80 | tcp | |
| NL | 95.101.78.209:80 | tcp |
Files
memory/808-130-0x0000000000000000-mapping.dmp
C:\Windows\System64\1rfusclient.exe
| MD5 | edc66358fbfd4fed0b446f67a229be63 |
| SHA1 | 9459061611df5469510e0b8b9790cb87fd5abeaf |
| SHA256 | 027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8 |
| SHA512 | 52d05eef4c8810c14b393b91e677853e795053bde8f2acad005257260482dafe0cbdf52874da8d0f5a6df4e107758ac0fd4b8ad6f94b79d5a607d52152bba32e |
C:\Windows\System64\1rfusclient.exe
| MD5 | edc66358fbfd4fed0b446f67a229be63 |
| SHA1 | 9459061611df5469510e0b8b9790cb87fd5abeaf |
| SHA256 | 027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8 |
| SHA512 | 52d05eef4c8810c14b393b91e677853e795053bde8f2acad005257260482dafe0cbdf52874da8d0f5a6df4e107758ac0fd4b8ad6f94b79d5a607d52152bba32e |
memory/1920-133-0x0000000000000000-mapping.dmp
C:\Windows\Zont911\Regedit.reg
| MD5 | 6c375f35079dd2c3a33f417735079c81 |
| SHA1 | c017ccea562e62a5dbb89952867ae18595c73691 |
| SHA256 | 2a776515deefe9f4d2a3e7cbb4e4ab6f1c534858dba34473ecb935a8ec0d6dcb |
| SHA512 | 0faedcaa54fe6d6cec872c71fffcb2b64408204028e7e2a6b62a4f666c10d83ed7e8e605c0e6936a8c02366ea8c86e3c794b68e6a46cdba9e25261b20bc52653 |
memory/2844-135-0x0000000000000000-mapping.dmp
C:\Windows\Zont911\Tupe.bat
| MD5 | 46b491b3846fcc6b17ffbbb598fe8ab4 |
| SHA1 | 6cf658c9d4320230e17462a047191a76979e2d19 |
| SHA256 | d1f1da9a663e4bcc6ceb55f5ff11c12cfd5baa1ff915d8f901118058a3aa5801 |
| SHA512 | 8a3796b7894d8604ba94f70277010406fba977bce598712c57dda3558589a7bcc2afabfda0b0f90c2a9e499e098cd81f0764159ca7db0f5d9c34c82917aeaa77 |
memory/4380-137-0x0000000000000000-mapping.dmp
C:\Windows\System64\rfusclient.exe
| MD5 | eac85a4a79a168cb47c0810e23e6d2fe |
| SHA1 | 0e053ed568dc2f07d76b0e006a9e19655797b89e |
| SHA256 | 86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f |
| SHA512 | b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0 |
C:\Windows\System64\rutserv.exe
| MD5 | fa4b26c53cfb2661ba072cf8da181b1a |
| SHA1 | 295f19aad28e80c5e371078989815c612110229c |
| SHA256 | 3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7 |
| SHA512 | f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64 |
memory/4772-139-0x0000000000000000-mapping.dmp
C:\Windows\System64\rutserv.exe
| MD5 | fa4b26c53cfb2661ba072cf8da181b1a |
| SHA1 | 295f19aad28e80c5e371078989815c612110229c |
| SHA256 | 3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7 |
| SHA512 | f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64 |
memory/2504-142-0x0000000000000000-mapping.dmp
C:\Windows\System64\rutserv.exe
| MD5 | fa4b26c53cfb2661ba072cf8da181b1a |
| SHA1 | 295f19aad28e80c5e371078989815c612110229c |
| SHA256 | 3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7 |
| SHA512 | f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64 |
memory/3960-144-0x0000000000000000-mapping.dmp
C:\Windows\System64\rutserv.exe
| MD5 | fa4b26c53cfb2661ba072cf8da181b1a |
| SHA1 | 295f19aad28e80c5e371078989815c612110229c |
| SHA256 | 3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7 |
| SHA512 | f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64 |
C:\Windows\System64\rutserv.exe
| MD5 | fa4b26c53cfb2661ba072cf8da181b1a |
| SHA1 | 295f19aad28e80c5e371078989815c612110229c |
| SHA256 | 3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7 |
| SHA512 | f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64 |
C:\Windows\System64\vp8decoder.dll
| MD5 | d43fa82fab5337ce20ad14650085c5d9 |
| SHA1 | 678aa092075ff65b6815ffc2d8fdc23af8425981 |
| SHA256 | c022958429edd94bfe31f2eacfe24ff6b45d6f12747725c449a36116373de03b |
| SHA512 | 103e61a9f58df03316676a074487e50ec518479c11068df3736df139b85c7671048c65bce0ef2c55b3c50c61fde54e9e6c7d1b795aea71263ae94c91d4874e0d |
C:\Windows\System64\vp8encoder.dll
| MD5 | dab4646806dfca6d0e0b4d80fa9209d6 |
| SHA1 | 8244dfe22ec2090eee89dad103e6b2002059d16a |
| SHA256 | cb6ef96d3a66ef08ec2c8640b751a52d6d4f4530cf01162a69966f0fd5153587 |
| SHA512 | aa5eb93bf23a10de797d6fb52a55a95d36bc48927c76fedd81e0c48872745cb7f7d1b3f230eaae42fd4e79b6a59ca707e56bd6963b03644cbd5984f11e98d6e7 |
memory/1708-150-0x0000000000000000-mapping.dmp
memory/2448-149-0x0000000000000000-mapping.dmp
C:\Windows\System64\rfusclient.exe
| MD5 | eac85a4a79a168cb47c0810e23e6d2fe |
| SHA1 | 0e053ed568dc2f07d76b0e006a9e19655797b89e |
| SHA256 | 86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f |
| SHA512 | b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0 |
C:\Windows\System64\rfusclient.exe
| MD5 | eac85a4a79a168cb47c0810e23e6d2fe |
| SHA1 | 0e053ed568dc2f07d76b0e006a9e19655797b89e |
| SHA256 | 86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f |
| SHA512 | b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0 |
memory/2176-153-0x0000000000000000-mapping.dmp
C:\Windows\System64\rfusclient.exe
| MD5 | eac85a4a79a168cb47c0810e23e6d2fe |
| SHA1 | 0e053ed568dc2f07d76b0e006a9e19655797b89e |
| SHA256 | 86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f |
| SHA512 | b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0 |