remcos | 54b874aa168963924382bcadb4e63d087c7dbf587a52f16df9efa19157f700b2

Analysis

max time kernel
146s
max time network
146s
platform
windows7_x64
resource
win7v20210410
submitted
29-04-2021 12:10

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General

Target

PO0900009.exe
Size

168KB
MD5

92a796d32256c200d3d3059c69de74a4
SHA1

8d203a1473eb53e9fe87b38bb66bc8d701535285
SHA256

54b874aa168963924382bcadb4e63d087c7dbf587a52f16df9efa19157f700b2
SHA512

8230c5e165667f40bd7a4e2ceb0f1c2d91edd94acfc152a26d5675ccb27655032ba4feb7b3ce775af553f7e503f70f1f3685905600d6002e21d2db17a4780fc6

Score

10^/10

remcos persistence rat

Malware Config

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Loads dropped DLL 1 IoCs

Processes:

PO0900009.exe

pid process

452 PO0900009.exe

pid	process
452	PO0900009.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

PO0900009.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\xifmvwyqevrrbn = "C:\\Users\\Admin\\AppData\\Roaming\\ncdsynuuc\\aiaf.exe"	PO0900009.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

PO0900009.exe

description pid process target process

PID 452 set thread context of 1432 452 PO0900009.exe PO0900009.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

PO0900009.exe

pid process

452 PO0900009.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

PO0900009.exe

pid process

1432 PO0900009.exe

description	pid	process	target process
PID 452 set thread context of 1432	452	PO0900009.exe	PO0900009.exe

pid	process
452	PO0900009.exe

pid	process
1432	PO0900009.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

PO0900009.exe

description	pid	process	target process
PID 452 wrote to memory of 1432	452	PO0900009.exe	PO0900009.exe
PID 452 wrote to memory of 1432	452	PO0900009.exe	PO0900009.exe
PID 452 wrote to memory of 1432	452	PO0900009.exe	PO0900009.exe
PID 452 wrote to memory of 1432	452	PO0900009.exe	PO0900009.exe
PID 452 wrote to memory of 1432	452	PO0900009.exe	PO0900009.exe

C:\Users\Admin\AppData\Local\Temp\PO0900009.exe
"C:\Users\Admin\AppData\Local\Temp\PO0900009.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:452

C:\Users\Admin\AppData\Local\Temp\PO0900009.exe
"C:\Users\Admin\AppData\Local\Temp\PO0900009.exe"
2⤵
- Suspicious use of SetWindowsHookEx
PID:1432

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nss1F6.tmp\ycphcnmmr30h8eb.dll
MD5
a2f6bef2275decc2f61687e3240892d6

SHA1
91a0dafd3cb00b305e66e228479685daf8e33461

SHA256
adb89dda6285e09a24ff43fb71b94126a4a66c9b3319bfa300ab92e7b103e655

SHA512
5da33b062145b1e5a56ba3c362d170548e4d4d1fb235748a932903a0611bd4ed0f5903355f6c72dbc4adf9082060dca00d101803280312c99455c5e8820c488a

Download Submit
memory/452-60-0x00000000753E1000-0x00000000753E3000-memory.dmp

Filesize
8KB

Download
memory/452-64-0x0000000000490000-0x0000000000493000-memory.dmp

Filesize
12KB

Download
memory/1432-62-0x00000000004172EC-mapping.dmp

Download
memory/1432-65-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download