remcos | 1e4c43645fb4a1b4ca08c7b22b4e63d38f7fe76191abda38e84fcada08339bfc

Analysis

max time kernel
152s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
21/10/2022, 08:24

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General

Target
Signed_PO_801221651.exe
Size 6KB
Sample221021-kap1vabcf9
SHA256 1e4c43645fb4a1b4ca08c7b22b4e63d38f7fe76191abda38e84fcada08339bfc
MD5 60032e284ee011f4f46fce76c60e138f
SHA1 f667ad3b3c50bd88c1c25ddd453f33acbfdb4dd9
SHA512 18ee51ebbdc2f85c282cfc66001d1951b9bd7ae723c64bfec159de8e02f29407b4c0f7afd074d5c14d68c4e7e1b39a85fdfd23e43015dfd0b5ae80fc6b084d6c
SSDEEP 48:62jgrsiEetneWESty89PYTaV6iIxdixNMr+2+zmbq5cSk9MXsAOsitiOlzM+J6M7:gieteWPtjA2VAdik+2+yJO+xi2BszNt
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos 55055 collection persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

55055

41.216.183.96:55055

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
RegardsRegards-NOWFJE
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2312-153-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2680-154-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2680-155-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 4 IoCs

resource	yara_rule
behavioral2/memory/4128-152-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2312-153-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/2680-154-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2680-155-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Signed_PO_801221651.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Signed_PO_801221651.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wgkmwmxuf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zofrbcbldrj\\Wgkmwmxuf.exe\""	Signed_PO_801221651.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1112 set thread context of 4508	1112	Signed_PO_801221651.exe	89
PID 4508 set thread context of 2680	4508	Signed_PO_801221651.exe	92
PID 4508 set thread context of 2312	4508	Signed_PO_801221651.exe	93
PID 4508 set thread context of 4128	4508	Signed_PO_801221651.exe	94

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 8 IoCs

pid	Process
5020	powershell.exe
5020	powershell.exe
4128	Signed_PO_801221651.exe
4128	Signed_PO_801221651.exe
2680	Signed_PO_801221651.exe
2680	Signed_PO_801221651.exe
2680	Signed_PO_801221651.exe
2680	Signed_PO_801221651.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
4508	Signed_PO_801221651.exe
4508	Signed_PO_801221651.exe
4508	Signed_PO_801221651.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1112	Signed_PO_801221651.exe
Token: SeDebugPrivilege	5020	powershell.exe
Token: SeDebugPrivilege	4128	Signed_PO_801221651.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1112 wrote to memory of 5020	1112	Signed_PO_801221651.exe	83
PID 1112 wrote to memory of 5020	1112	Signed_PO_801221651.exe	83
PID 1112 wrote to memory of 5020	1112	Signed_PO_801221651.exe	83
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 1112 wrote to memory of 4508	1112	Signed_PO_801221651.exe	89
PID 4508 wrote to memory of 2680	4508	Signed_PO_801221651.exe	92
PID 4508 wrote to memory of 2680	4508	Signed_PO_801221651.exe	92
PID 4508 wrote to memory of 2680	4508	Signed_PO_801221651.exe	92
PID 4508 wrote to memory of 2680	4508	Signed_PO_801221651.exe	92
PID 4508 wrote to memory of 2312	4508	Signed_PO_801221651.exe	93
PID 4508 wrote to memory of 2312	4508	Signed_PO_801221651.exe	93
PID 4508 wrote to memory of 2312	4508	Signed_PO_801221651.exe	93
PID 4508 wrote to memory of 2312	4508	Signed_PO_801221651.exe	93
PID 4508 wrote to memory of 4128	4508	Signed_PO_801221651.exe	94
PID 4508 wrote to memory of 4128	4508	Signed_PO_801221651.exe	94
PID 4508 wrote to memory of 4128	4508	Signed_PO_801221651.exe	94
PID 4508 wrote to memory of 4128	4508	Signed_PO_801221651.exe	94

C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe
"C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1112
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5020
- C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe
  C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4508
- - C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe
    C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe /stext "C:\Users\Admin\AppData\Local\Temp\dwdjxtzhyxqlhxnu"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2680
- - C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe
    C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe /stext "C:\Users\Admin\AppData\Local\Temp\fyicxmjaufjqjdbyyrl"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2312
- - C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe
    C:\Users\Admin\AppData\Local\Temp\Signed_PO_801221651.exe /stext "C:\Users\Admin\AppData\Local\Temp\psomyeucinbuurxkpcyuspd"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4128

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

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

dwdjxtzhyxqlhxnu

Path C:\Users\Admin\AppData\Local\Temp\dwdjxtzhyxqlhxnu
Size 4KB
SHA256 76d4066990e2ee2776f733a25ce23e9af545fd6f1a3b5760d603bdc05d9402d5
MD5 30177e1276595fd69ea96b692f49d776
SHA1 75769c29031ca1ad8e175dd700c74b5e35c5b0c7
SHA512 ccdf20174d299de8ec21445faaf4ebe95c04bd7634c9fe138ba54262b754620c2dfd53a5c94b7d53518181d2eab7b5c97d7933d3a66d05220b06aee120893d4b
SSDEEP 48:wvvv0SgxfvvcSgxfdvv0SgxBvv0Sgxakvv0Sg7:mvJgxvxgp1vJgPvJgbvJg7
MD5 SHA1 SHA512 SSDEEP

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memory/1112-132-0x00000000000C0000-0x00000000000C8000-memory.dmp

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memory/1112-133-0x00000000056D0000-0x00000000056F2000-memory.dmp

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memory/1112-142-0x0000000005B60000-0x0000000005BF2000-memory.dmp

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memory/1112-143-0x000000003E380000-0x000000003E924000-memory.dmp

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memory/2312-153-0x0000000000400000-0x0000000000457000-memory.dmp

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memory/2680-155-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2680-154-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4128-152-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4508-145-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4508-146-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4508-147-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4508-148-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4508-157-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/5020-139-0x00000000066D0000-0x00000000066EE000-memory.dmp

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memory/5020-140-0x0000000007F30000-0x00000000085AA000-memory.dmp

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memory/5020-138-0x00000000060A0000-0x0000000006106000-memory.dmp

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memory/5020-137-0x0000000005FC0000-0x0000000006026000-memory.dmp

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memory/5020-136-0x0000000005880000-0x0000000005EA8000-memory.dmp

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memory/5020-135-0x0000000005140000-0x0000000005176000-memory.dmp

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memory/5020-141-0x0000000006BC0000-0x0000000006BDA000-memory.dmp

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