remcos | be8ea87d52a6570b9076067c31f86ebb6a185b5c2ef94a7f3a1dab50829f0156

Analysis

max time kernel
148s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
23/07/2024, 12:45

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General

Target
fd0987654345.exe
Size 19KB
Sample240723-py3dastbke
SHA256 be8ea87d52a6570b9076067c31f86ebb6a185b5c2ef94a7f3a1dab50829f0156
MD5 0ea93be3e01f5f04f45065e9b765dfa2
SHA1 6a8d20dbe318fccd9208615d29d7e411b82978bc
SHA512 3679eec6e3012fad456b82f3b9d24151b69e14fc8a60f09dc7e9fa7742d3b7b48226a50bf0f4600256a227244089c2857c1d2ea4384958196a78d8b3665698bf
SSDEEP 384:177ekgGt+GTfeJTjdep2DiAM8NtzVrjECvpTZ7YZiiay9ycyrsR2vZ:UypiYin8ycyrsR2vZ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost collection rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

107.175.229.139:8823

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-2BGC0K
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Detected Nirsoft tools 8 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3636-27-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4768-29-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4508-34-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4508-38-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3636-39-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3636-32-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4768-31-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4768-41-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4508-34-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4508-38-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4768-29-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4768-31-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4768-41-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	MSBuild.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4552 set thread context of 4864	4552	fd0987654345.exe	86
PID 4864 set thread context of 4768	4864	MSBuild.exe	94
PID 4864 set thread context of 4508	4864	MSBuild.exe	96
PID 4864 set thread context of 3636	4864	MSBuild.exe	97

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4552	fd0987654345.exe
4552	fd0987654345.exe
4552	fd0987654345.exe
4768	MSBuild.exe
4768	MSBuild.exe
3636	MSBuild.exe
3636	MSBuild.exe
4768	MSBuild.exe
4768	MSBuild.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4864	MSBuild.exe
4864	MSBuild.exe
4864	MSBuild.exe
4864	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4552	fd0987654345.exe
Token: SeDebugPrivilege	3636	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4864	MSBuild.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 840	4552	fd0987654345.exe	85
PID 4552 wrote to memory of 840	4552	fd0987654345.exe	85
PID 4552 wrote to memory of 840	4552	fd0987654345.exe	85
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4552 wrote to memory of 4864	4552	fd0987654345.exe	86
PID 4864 wrote to memory of 4768	4864	MSBuild.exe	94
PID 4864 wrote to memory of 4768	4864	MSBuild.exe	94
PID 4864 wrote to memory of 4768	4864	MSBuild.exe	94
PID 4864 wrote to memory of 4768	4864	MSBuild.exe	94
PID 4864 wrote to memory of 624	4864	MSBuild.exe	95
PID 4864 wrote to memory of 624	4864	MSBuild.exe	95
PID 4864 wrote to memory of 624	4864	MSBuild.exe	95
PID 4864 wrote to memory of 4508	4864	MSBuild.exe	96
PID 4864 wrote to memory of 4508	4864	MSBuild.exe	96
PID 4864 wrote to memory of 4508	4864	MSBuild.exe	96
PID 4864 wrote to memory of 4508	4864	MSBuild.exe	96
PID 4864 wrote to memory of 3636	4864	MSBuild.exe	97
PID 4864 wrote to memory of 3636	4864	MSBuild.exe	97
PID 4864 wrote to memory of 3636	4864	MSBuild.exe	97
PID 4864 wrote to memory of 3636	4864	MSBuild.exe	97

C:\Users\Admin\AppData\Local\Temp\fd0987654345.exe
"C:\Users\Admin\AppData\Local\Temp\fd0987654345.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  PID:840
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4864
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\kdgbqlpemghrelw"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4768
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\uxtuqdzyiozwprksuw"
    3⤵
    PID:624
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\uxtuqdzyiozwprksuw"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:4508
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\ezyerokzwwrbrfhwlhrdxd"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 b9bf858e00c7ca2db1adc83487b58620320afe54bc2b2b7761e9c4109b37aaa2
MD5 b372fa17a3d1297a393663739cd4b57a
SHA1 e32bbd66b16065b77828276ecd1d6bf999753e39
SHA512 243398ac2506644228fe3a3d85e54d85845131adef57173eed5d92096babd0fa8f9c8dfa382650b117e48c5be5d56fa665b36b603666c708342bb30b2f558e0d
MD5 SHA1 SHA512

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kdgbqlpemghrelw

Path C:\Users\Admin\AppData\Local\Temp\kdgbqlpemghrelw
Size 4KB
SHA256 9e347aa1a363532c72d7728abe1afdc48b9418fae8cbf8bcbc50c9c22dfefa57
MD5 60e30555becdb968406edb87fff512ef
SHA1 65551417f6371c40e6d5dab38fe87ab634f9446e
SHA512 cbe1aebf171b54f481028208aa85fb04145cc40772cc30e67107caa5cc70c73f274da362766f125093c1fab1416c687744e53e0f7c30b6ead866c6f6ba671449
SSDEEP 48:wvvv0QTxfvvcQTxfdvv0QTxBvv0QTxakvv0QT7:mvlxvdp1vlPvlbvl7
MD5 SHA1 SHA512 SSDEEP

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memory/3636-27-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3636-23-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3636-26-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3636-32-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3636-39-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4508-22-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4508-30-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4508-38-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4508-34-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4508-33-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4552-13-0x00007FFFE2E00000-0x00007FFFE38C1000-memory.dmp

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memory/4552-1-0x00007FFFE2E03000-0x00007FFFE2E05000-memory.dmp

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memory/4552-2-0x0000000000DE0000-0x0000000000DEA000-memory.dmp

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memory/4552-3-0x00007FFFE2E00000-0x00007FFFE38C1000-memory.dmp

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memory/4552-0-0x00000000004F0000-0x00000000004FA000-memory.dmp

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memory/4768-24-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4768-41-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4768-20-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4768-29-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4768-31-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4864-11-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-47-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4864-7-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-6-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-5-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-12-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-4-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-14-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-15-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-19-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-17-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-43-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4864-46-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/4864-8-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-48-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-52-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-16-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-55-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-56-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-63-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-64-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-71-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-72-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-79-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4864-80-0x0000000000400000-0x0000000000482000-memory.dmp

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