remcos | ec738ca43b35df7cd2e87a4867a52807fa5205af048cd9835ac0024d488fac73

General

Target

SO#HKGB05163300~HKGB05163305.exe
Size

836KB
MD5

fd3015ffdd0f2885a2b74b2bd7878983
SHA1

20df95727c46bcee90fdb1b8f6bc9b535283c4c6
SHA256

ec738ca43b35df7cd2e87a4867a52807fa5205af048cd9835ac0024d488fac73
SHA512

ca0c0d1f93d18105f7c984c68023fe9881da21ecede0835920915cae1c4d5830156e3f7130a774960daab44055b0b0fdb2b92ea9dc638520f068bc6c46bf2727

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

194.5.97.27:1988

Signatures

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

SO#HKGB05163300~HKGB05163305.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Uiksi = "C:\\Users\\Admin\\iskiU.url"	SO#HKGB05163300~HKGB05163305.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

Processes:

description	flow	ioc
HTTP User-Agent header	15	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	17	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

SO#HKGB05163300~HKGB05163305.exe

pid process

4808 SO#HKGB05163300~HKGB05163305.exe
4808 SO#HKGB05163300~HKGB05163305.exe

pid	process
4808	SO#HKGB05163300~HKGB05163305.exe
4808	SO#HKGB05163300~HKGB05163305.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

SO#HKGB05163300~HKGB05163305.exe

description	pid	process	target process
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 4808 wrote to memory of 4444	4808	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe

C:\Users\Admin\AppData\Local\Temp\SO#HKGB05163300~HKGB05163305.exe
"C:\Users\Admin\AppData\Local\Temp\SO#HKGB05163300~HKGB05163305.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4808

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Program Files (x86)\internet explorer\ieinstal.exe"
2⤵
PID:4444

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/4444-3-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/4444-4-0x0000000000000000-mapping.dmp

Download
memory/4444-5-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/4444-7-0x00000000004F0000-0x00000000004F1000-memory.dmp

Filesize
4KB

Download
memory/4444-8-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4444-13-0x0000000010540000-0x0000000010565000-memory.dmp

Filesize
148KB

Download
memory/4444-15-0x0000000000720000-0x0000000000741000-memory.dmp

Filesize
132KB

Download
memory/4808-2-0x0000000000620000-0x0000000000621000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads