remcos | 595a6f87c8d7f4d41ff378424f03f27187b5abb95f8e8ca2507a00f01bacd11b

General

Target

ORDER3898.exe
Size

716KB
MD5

41a4bbdc8c2f1ff444d2fb7ab9fbeaf5
SHA1

25170e511f605a28205d83c87cd8ba73d7580ce7
SHA256

595a6f87c8d7f4d41ff378424f03f27187b5abb95f8e8ca2507a00f01bacd11b
SHA512

12dec3f07ba86b9e17c097d65f15fc3961a274b9d7a66499700e718a5d169affca5d1510ac8be3d1dad215e963d0e90ec4a703ac4798fe7078a1d9f47f4c2108

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

79.134.225.19:2556

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:

ORDER3898.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Ajlnx = "C:\\Users\\Admin\\xnljA.url"	ORDER3898.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

ORDER3898.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	ORDER3898.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 040000000100000010000000410352dc0ff7501b16f0028eba6f45c50f00000001000000140000005bcaa1c2780f0bcb5a90770451d96f38963f012d0b000000010000001e000000440053005400200052006f006f0074002000430041002000580033000000090000000100000016000000301406082b0601050507030406082b06010505070301140000000100000014000000c4a7b1a47b2c71fadbe14b9075ffc415608589101d00000001000000100000004558d512eecb27464920897de7b66053030000000100000014000000dac9024f54d8f6df94935fb1732638ca6ad77c131900000001000000100000006cf252fec3e8f20996de5d4dd9aef42420000000010000004e0300003082034a30820232a003020102021044afb080d6a327ba893039862ef8406b300d06092a864886f70d0101050500303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f74204341205833301e170d3030303933303231313231395a170d3231303933303134303131355a303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f7420434120583330820122300d06092a864886f70d01010105000382010f003082010a0282010100dfafe99750088357b4cc6265f69082ecc7d32c6b30ca5becd9c37dc740c118148be0e83376492ae33f214993ac4e0eaf3e48cb65eefcd3210f65d22ad9328f8ce5f777b0127bb595c089a3a9baed732e7a0c063283a27e8a1430cd11a0e12a38b9790a31fd50bd8065dfb7516383c8e28861ea4b6181ec526bb9a2e24b1a289f48a39e0cda098e3e172e1edd20df5bc62a8aab2ebd70adc50b1a25907472c57b6aab34d63089ffe568137b540bc8d6aeec5a9c921e3d64b38cc6dfbfc94170ec1672d526ec38553943d0fcfd185c40f197ebd59a9b8d1dbada25b9c6d8dfc115023aabda6ef13e2ef55c089c3cd68369e4109b192ab62957e3e53d9b9ff0025d0203010001a3423040300f0603551d130101ff040530030101ff300e0603551d0f0101ff040403020106301d0603551d0e04160414c4a7b1a47b2c71fadbe14b9075ffc41560858910300d06092a864886f70d01010505000382010100a31a2c9b17005ca91eee2866373abf83c73f4bc309a095205de3d95944d23e0d3ebd8a4ba0741fce10829c741a1d7e981addcb134bb32044e491e9ccfc7da5db6ae5fee6fde04eddb7003ab57049aff2e5eb02f1d1028b19cb943a5e48c4181e58195f1e025af00cf1b1ada9dc59868b6ee991f586cafab96633aa595bcee2a7167347cb2bcc99b03748cfe3564bf5cf0f0c723287c6f044bb53726d43f526489a5267b758abfe67767178db0da256141339243185a2a8025a3047e1dd5007bc02099000eb6463609b16bc88c912e6d27d918bf93d328d65b4e97cb15776eac5b62839bf15651cc8f677966a0a8d770bd8910b048e07db29b60aee9d82353510	ORDER3898.exe

Script User-Agent 2 IoCs

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

Processes:

description	flow	ioc
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	7	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

ORDER3898.exe

description	pid	process	target process
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe
PID 784 wrote to memory of 1356	784	ORDER3898.exe	ieinstal.exe

C:\Users\Admin\AppData\Local\Temp\ORDER3898.exe
"C:\Users\Admin\AppData\Local\Temp\ORDER3898.exe"
1⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious use of WriteProcessMemory
PID:784

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Program Files (x86)\internet explorer\ieinstal.exe"
2⤵
PID:1356

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

2

T1112

Install Root Certificate

1

T1130

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/784-2-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/1356-4-0x0000000000000000-mapping.dmp

Download
memory/1356-3-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/1356-5-0x0000000000110000-0x0000000000111000-memory.dmp

Filesize
4KB

Download
memory/1356-7-0x0000000000330000-0x0000000000331000-memory.dmp

Filesize
4KB

Download
memory/1356-8-0x0000000075C61000-0x0000000075C63000-memory.dmp

Filesize
8KB

Download
memory/1356-13-0x0000000010540000-0x0000000010565000-memory.dmp

Filesize
148KB

Download
memory/1356-14-0x0000000000340000-0x0000000000361000-memory.dmp

Filesize
132KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads