remcos | cb7ffda616dbfb59cec05339b9bee2e7ecae48595545ee4e63d93e9751feb594

Analysis

max time kernel
149s
max time network
151s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
09/01/2023, 13:09

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General

Target
698538dba415e2812977332cc1435722.exe
Size 990KB
Sample230109-qdr79sec46
SHA256 cb7ffda616dbfb59cec05339b9bee2e7ecae48595545ee4e63d93e9751feb594
MD5 698538dba415e2812977332cc1435722
SHA1 e2471d54803ba0b53ed3593d8d1a3ea33768f276
SHA512 b7a8d08508427627a086e839283d0bbdfa6c723ae51b8271f040c2eb7accaf03aaf6f71d429fdcac30166ca579bfa9bf55779dfa26885207a1323ac60d4c7a1b
SSDEEP 24576:J7qCZ3GpdnPmDZygjYYjnaDBRjqZNvGAieuTbvzHY+l7zkkMv2v:oCZ3GpdnuDZygjYQnadkvvae8LzHT7aO
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos mekino-remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Mekino-RemoteHost

nadiac7806.hopto.org:2397

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
los.exe
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-XBQXEL
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
trn
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Executes dropped EXE 2 IoCs

pid	Process
1184	los.exe
428	los.exe

Loads dropped DLL 2 IoCs

pid	Process
1964	cmd.exe
1964	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	698538dba415e2812977332cc1435722.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	698538dba415e2812977332cc1435722.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\	los.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	los.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	los.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	los.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\	698538dba415e2812977332cc1435722.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\trn = "\"C:\\Users\\Admin\\AppData\\Roaming\\los.exe\""	698538dba415e2812977332cc1435722.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1664 set thread context of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1184 set thread context of 428	1184	los.exe	34

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1664	698538dba415e2812977332cc1435722.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1664	698538dba415e2812977332cc1435722.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
428	los.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 1664 wrote to memory of 1240	1664	698538dba415e2812977332cc1435722.exe	28
PID 1664 wrote to memory of 1240	1664	698538dba415e2812977332cc1435722.exe	28
PID 1664 wrote to memory of 1240	1664	698538dba415e2812977332cc1435722.exe	28
PID 1664 wrote to memory of 1240	1664	698538dba415e2812977332cc1435722.exe	28
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1664 wrote to memory of 1376	1664	698538dba415e2812977332cc1435722.exe	29
PID 1376 wrote to memory of 728	1376	698538dba415e2812977332cc1435722.exe	30
PID 1376 wrote to memory of 728	1376	698538dba415e2812977332cc1435722.exe	30
PID 1376 wrote to memory of 728	1376	698538dba415e2812977332cc1435722.exe	30
PID 1376 wrote to memory of 728	1376	698538dba415e2812977332cc1435722.exe	30
PID 728 wrote to memory of 1964	728	WScript.exe	31
PID 728 wrote to memory of 1964	728	WScript.exe	31
PID 728 wrote to memory of 1964	728	WScript.exe	31
PID 728 wrote to memory of 1964	728	WScript.exe	31
PID 1964 wrote to memory of 1184	1964	cmd.exe	33
PID 1964 wrote to memory of 1184	1964	cmd.exe	33
PID 1964 wrote to memory of 1184	1964	cmd.exe	33
PID 1964 wrote to memory of 1184	1964	cmd.exe	33
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34
PID 1184 wrote to memory of 428	1184	los.exe	34

C:\Users\Admin\AppData\Local\Temp\698538dba415e2812977332cc1435722.exe
"C:\Users\Admin\AppData\Local\Temp\698538dba415e2812977332cc1435722.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1664
- C:\Users\Admin\AppData\Local\Temp\698538dba415e2812977332cc1435722.exe
  "C:\Users\Admin\AppData\Local\Temp\698538dba415e2812977332cc1435722.exe"
  2⤵
  PID:1240
- C:\Users\Admin\AppData\Local\Temp\698538dba415e2812977332cc1435722.exe
  "C:\Users\Admin\AppData\Local\Temp\698538dba415e2812977332cc1435722.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1376
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\zemkkwvydtpbzoemkbzbsiaituoiwas.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:728
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\los.exe"
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1964
    - - C:\Users\Admin\AppData\Roaming\los.exe
        
        C:\Users\Admin\AppData\Roaming\los.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:1184
      - C:\Users\Admin\AppData\Roaming\los.exe
        
        "C:\Users\Admin\AppData\Roaming\los.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:428

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

zemkkwvydtpbzoemkbzbsiaituoiwas.vbs

Path C:\Users\Admin\AppData\Local\Temp\zemkkwvydtpbzoemkbzbsiaituoiwas.vbs
Size 398B
SHA256 65c976c1e229ea7bc352c40862a0b71208b0b6bbe94a74d2ecb14b1fb70fcd3f
MD5 cf758ec06c989323030d19d47fc4dd16
SHA1 3e9f66e79d7c8964e0446f76b163198384bebb24
SHA512 7d4e37e7e8d73a554fff47cf1557cc6c89e816b567fac40019805ac67b11db6f2f635134a30f7dbac11b9733af2caec9e2137fa1e03d588e3adea64adbfa09ea
MD5 SHA1 SHA512

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los.exe

Path C:\Users\Admin\AppData\Roaming\los.exe
Size 990KB
SHA256 cb7ffda616dbfb59cec05339b9bee2e7ecae48595545ee4e63d93e9751feb594
MD5 698538dba415e2812977332cc1435722
SHA1 e2471d54803ba0b53ed3593d8d1a3ea33768f276
SHA512 b7a8d08508427627a086e839283d0bbdfa6c723ae51b8271f040c2eb7accaf03aaf6f71d429fdcac30166ca579bfa9bf55779dfa26885207a1323ac60d4c7a1b
SSDEEP 24576:J7qCZ3GpdnPmDZygjYYjnaDBRjqZNvGAieuTbvzHY+l7zkkMv2v:oCZ3GpdnuDZygjYQnadkvvae8LzHT7aO
MD5 SHA1 SHA512 SSDEEP

Submit Download

los.exe

Path C:\Users\Admin\AppData\Roaming\los.exe
Size 990KB
SHA256 cb7ffda616dbfb59cec05339b9bee2e7ecae48595545ee4e63d93e9751feb594
MD5 698538dba415e2812977332cc1435722
SHA1 e2471d54803ba0b53ed3593d8d1a3ea33768f276
SHA512 b7a8d08508427627a086e839283d0bbdfa6c723ae51b8271f040c2eb7accaf03aaf6f71d429fdcac30166ca579bfa9bf55779dfa26885207a1323ac60d4c7a1b
SSDEEP 24576:J7qCZ3GpdnPmDZygjYYjnaDBRjqZNvGAieuTbvzHY+l7zkkMv2v:oCZ3GpdnuDZygjYQnadkvvae8LzHT7aO
MD5 SHA1 SHA512 SSDEEP

Submit Download

los.exe

Path C:\Users\Admin\AppData\Roaming\los.exe
Size 990KB
SHA256 cb7ffda616dbfb59cec05339b9bee2e7ecae48595545ee4e63d93e9751feb594
MD5 698538dba415e2812977332cc1435722
SHA1 e2471d54803ba0b53ed3593d8d1a3ea33768f276
SHA512 b7a8d08508427627a086e839283d0bbdfa6c723ae51b8271f040c2eb7accaf03aaf6f71d429fdcac30166ca579bfa9bf55779dfa26885207a1323ac60d4c7a1b
SSDEEP 24576:J7qCZ3GpdnPmDZygjYYjnaDBRjqZNvGAieuTbvzHY+l7zkkMv2v:oCZ3GpdnuDZygjYQnadkvvae8LzHT7aO
MD5 SHA1 SHA512 SSDEEP

Submit Download

los.exe

Path \Users\Admin\AppData\Roaming\los.exe
Size 990KB
SHA256 cb7ffda616dbfb59cec05339b9bee2e7ecae48595545ee4e63d93e9751feb594
MD5 698538dba415e2812977332cc1435722
SHA1 e2471d54803ba0b53ed3593d8d1a3ea33768f276
SHA512 b7a8d08508427627a086e839283d0bbdfa6c723ae51b8271f040c2eb7accaf03aaf6f71d429fdcac30166ca579bfa9bf55779dfa26885207a1323ac60d4c7a1b
SSDEEP 24576:J7qCZ3GpdnPmDZygjYYjnaDBRjqZNvGAieuTbvzHY+l7zkkMv2v:oCZ3GpdnuDZygjYQnadkvvae8LzHT7aO
MD5 SHA1 SHA512 SSDEEP

Submit Download

los.exe

Path \Users\Admin\AppData\Roaming\los.exe
Size 990KB
SHA256 cb7ffda616dbfb59cec05339b9bee2e7ecae48595545ee4e63d93e9751feb594
MD5 698538dba415e2812977332cc1435722
SHA1 e2471d54803ba0b53ed3593d8d1a3ea33768f276
SHA512 b7a8d08508427627a086e839283d0bbdfa6c723ae51b8271f040c2eb7accaf03aaf6f71d429fdcac30166ca579bfa9bf55779dfa26885207a1323ac60d4c7a1b
SSDEEP 24576:J7qCZ3GpdnPmDZygjYYjnaDBRjqZNvGAieuTbvzHY+l7zkkMv2v:oCZ3GpdnuDZygjYQnadkvvae8LzHT7aO
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/428-108-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/428-107-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/428-106-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1184-87-0x0000000010CC0000-0x0000000010DBC000-memory.dmp

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memory/1376-63-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-66-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-76-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-72-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-78-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-70-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-60-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-67-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-68-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-65-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1376-61-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/1664-54-0x0000000010650000-0x000000001074C000-memory.dmp

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memory/1664-59-0x0000000004620000-0x00000000046AC000-memory.dmp

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memory/1664-58-0x0000000007A20000-0x0000000007AE2000-memory.dmp

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memory/1664-57-0x00000000004C0000-0x00000000004CA000-memory.dmp

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memory/1664-56-0x00000000004B0000-0x00000000004C6000-memory.dmp

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memory/1664-55-0x0000000076181000-0x0000000076183000-memory.dmp

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