remcos | 4969dc5e2b7349e189cdc079c2e9e02014e559d1315564b6d6fd18eeb252c605

General

Target

RFQ-00205-0305.exe
Size

753KB
MD5

621cb2fb281f8fc1a1e0bfdbd317570e
SHA1

378b0726c6d90a9ba4c3f58ca4bef518e6ef6410
SHA256

4969dc5e2b7349e189cdc079c2e9e02014e559d1315564b6d6fd18eeb252c605
SHA512

bc257309d57129ae19402e25be0b69243f7fdc9686d0d690d9ce4357f311d0487bfa05569f79e530ba3b936dee55e7137b3ccb73cd660830c823da482c8ce5ba

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

style.ptbagasps.co.id:42024

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 2 IoCs

Processes:

Netplwiz.exeNetplwiz.exe

pid process

1424 Netplwiz.exe
1056 Netplwiz.exe

pid	process
1424	Netplwiz.exe
1056	Netplwiz.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RFQ-00205-0305.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\Txxvuz = "C:\\Users\\Public\\Libraries\\zuvxxT.url"	RFQ-00205-0305.exe

Drops file in System32 directory 1 IoCs

Processes:

secinit.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\secinit.exe secinit.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQ-00205-0305.exe

description pid process target process

PID 1084 set thread context of 572 1084 RFQ-00205-0305.exe secinit.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

secinit.exe

pid process

572 secinit.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\secinit.exe	secinit.exe

description	pid	process	target process
PID 1084 set thread context of 572	1084	RFQ-00205-0305.exe	secinit.exe

pid	process
572	secinit.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

RFQ-00205-0305.execmd.exesecinit.exe

description	pid	process	target process
PID 1084 wrote to memory of 572	1084	RFQ-00205-0305.exe	secinit.exe
PID 1084 wrote to memory of 572	1084	RFQ-00205-0305.exe	secinit.exe
PID 1084 wrote to memory of 572	1084	RFQ-00205-0305.exe	secinit.exe
PID 1084 wrote to memory of 572	1084	RFQ-00205-0305.exe	secinit.exe
PID 1084 wrote to memory of 572	1084	RFQ-00205-0305.exe	secinit.exe
PID 1084 wrote to memory of 572	1084	RFQ-00205-0305.exe	secinit.exe
PID 1084 wrote to memory of 1184	1084	RFQ-00205-0305.exe	cmd.exe
PID 1084 wrote to memory of 1184	1084	RFQ-00205-0305.exe	cmd.exe
PID 1084 wrote to memory of 1184	1084	RFQ-00205-0305.exe	cmd.exe
PID 1084 wrote to memory of 1184	1084	RFQ-00205-0305.exe	cmd.exe
PID 1184 wrote to memory of 1484	1184	cmd.exe	cmd.exe
PID 1184 wrote to memory of 1484	1184	cmd.exe	cmd.exe
PID 1184 wrote to memory of 1484	1184	cmd.exe	cmd.exe
PID 1184 wrote to memory of 1484	1184	cmd.exe	cmd.exe
PID 572 wrote to memory of 1060	572	secinit.exe	WScript.exe
PID 572 wrote to memory of 1060	572	secinit.exe	WScript.exe
PID 572 wrote to memory of 1060	572	secinit.exe	WScript.exe
PID 572 wrote to memory of 1060	572	secinit.exe	WScript.exe

C:\Users\Admin\AppData\Local\Temp\RFQ-00205-0305.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ-00205-0305.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1084

C:\Windows\SysWOW64\secinit.exe
C:\Windows\System32\secinit.exe
2⤵
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:572

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\iqvplh.vbs"
3⤵
PID:1060

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Public\stt.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:1184

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /K C:\Users\Public\PXOR.bat
3⤵
PID:1484

C:\Windows \System32\Netplwiz.exe
"C:\Windows \System32\Netplwiz.exe"
4⤵
- Executes dropped EXE
PID:1424

C:\Windows \System32\Netplwiz.exe
"C:\Windows \System32\Netplwiz.exe"
4⤵
- Executes dropped EXE
PID:1056

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\iqvplh.vbs
MD5
1c4314c4b5ed0110fb017425efe01fed

SHA1
d04ec8a5f4ee577d8b31d54b0fdd6687981a4074

SHA256
352d219bec004bbf6eea91efe3625baf4bd393a449ddf0c8e27991ab317ed220

SHA512
bf0ed4ee4c764dc86a1099feff7b904cddd1596883c2476faec9cae9df29f153d0e540aaba52aba34846eacb7a077f265219826d18ac4d03b6c6e625fbd216f2

Download Submit
C:\Users\Public\NETUTILS.dll
MD5
39507d772c63ca496a25a14a8b5d14b2

SHA1
5b603f5c11eb9ab4313694315b4d4894ff4641d4

SHA256
36d1fa474cd8271f9b74b9481025614b6ff309f767f69d9f1ff3960c7205ad12

SHA512
0c740fd7b6d67d9938b0d8e1ea7d6c41910dd6d0b85b4ec8b6015ff8c0c73798dee01f01da0b5b0c07038663aca7945faca0e2b5afc1cb751aaba7567d332f5f

Download Submit
C:\Users\Public\Netplwiz.exe
MD5
f94b7fb6dac49844d03c7087b2d8b472

SHA1
0e84139fced0ee8ef929d0bd5f01559a7dcf1db0

SHA256
46e31f337ed0d9a6fe3f159abc91c9b9b6a6062982bbcd84a51784d7128e7ae4

SHA512
d63878f94f7699e4cc63c2cd885c29455e0c423d32dba750e4fc3aa74dbaca80a1a4b176719213b9fc6584de6a40cddff7864c7fb4cfba13dfcb437a36e41b80

Download Submit
C:\Users\Public\PXOR.bat
MD5
0d8aef656413642f55e0902cc5df5e6f

SHA1
73ec56d08bd9b3c45d55c97bd1c1286b77c8ff49

SHA256
670f94b92f45bc2f3f44a80c7f3021f874aa16fde38ed7d7f3ebed13ae09fa11

SHA512
efe690b1bcf06e16be469622b45c98b5dc1f1e06410cbf7e7dccb2975524c4d6bc7e23de9a129d50d73cd924f02e23f925555894f2c7da1064dcc57151f50876

Download Submit
C:\Users\Public\stt.bat
MD5
8a850253c31df9a7e1c00c80df2630d5

SHA1
e3da74081b027a3b591488b28da22742bcfe8495

SHA256
8fdeba3ec903bde700342083d16f72452366aa0b1b30d0e58dee0af74cebfa35

SHA512
30510bdc34680a0865a0811d9be29dec91c74717feccd58c9b4d88e77be9e5d13a539806a1b2901aff595b2fe2cc45926b69ed42e899d2dd2913c78a732e84d1

Download Submit
C:\Windows \System32\Netplwiz.exe
MD5
f94b7fb6dac49844d03c7087b2d8b472

SHA1
0e84139fced0ee8ef929d0bd5f01559a7dcf1db0

SHA256
46e31f337ed0d9a6fe3f159abc91c9b9b6a6062982bbcd84a51784d7128e7ae4

SHA512
d63878f94f7699e4cc63c2cd885c29455e0c423d32dba750e4fc3aa74dbaca80a1a4b176719213b9fc6584de6a40cddff7864c7fb4cfba13dfcb437a36e41b80

Download Submit
C:\Windows \System32\Netplwiz.exe
MD5
f94b7fb6dac49844d03c7087b2d8b472

SHA1
0e84139fced0ee8ef929d0bd5f01559a7dcf1db0

SHA256
46e31f337ed0d9a6fe3f159abc91c9b9b6a6062982bbcd84a51784d7128e7ae4

SHA512
d63878f94f7699e4cc63c2cd885c29455e0c423d32dba750e4fc3aa74dbaca80a1a4b176719213b9fc6584de6a40cddff7864c7fb4cfba13dfcb437a36e41b80

Download Submit
memory/572-67-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/572-64-0x00000000752F1000-0x00000000752F3000-memory.dmp

Filesize
8KB

Download
memory/572-61-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/572-62-0x000000000042EEEF-mapping.dmp

Download
memory/1060-75-0x0000000000000000-mapping.dmp

Download
memory/1084-60-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/1184-63-0x0000000000000000-mapping.dmp

Download
memory/1484-66-0x0000000000000000-mapping.dmp

Download
memory/1484-74-0x0000000002210000-0x0000000002305000-memory.dmp

Filesize
980KB

Download

Analysis

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