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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\Uiksi = "C:\\Users\\Admin\\iskiU.url"	SO#HKGB05163300~HKGB05163305.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

SO#HKGB05163300~HKGB05163305.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Main	SO#HKGB05163300~HKGB05163305.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

SO#HKGB05163300~HKGB05163305.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	SO#HKGB05163300~HKGB05163305.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 040000000100000010000000410352dc0ff7501b16f0028eba6f45c50f00000001000000140000005bcaa1c2780f0bcb5a90770451d96f38963f012d0b000000010000001e000000440053005400200052006f006f0074002000430041002000580033000000090000000100000016000000301406082b0601050507030406082b06010505070301140000000100000014000000c4a7b1a47b2c71fadbe14b9075ffc415608589101d00000001000000100000004558d512eecb27464920897de7b66053030000000100000014000000dac9024f54d8f6df94935fb1732638ca6ad77c131900000001000000100000006cf252fec3e8f20996de5d4dd9aef42420000000010000004e0300003082034a30820232a003020102021044afb080d6a327ba893039862ef8406b300d06092a864886f70d0101050500303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f74204341205833301e170d3030303933303231313231395a170d3231303933303134303131355a303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f7420434120583330820122300d06092a864886f70d01010105000382010f003082010a0282010100dfafe99750088357b4cc6265f69082ecc7d32c6b30ca5becd9c37dc740c118148be0e83376492ae33f214993ac4e0eaf3e48cb65eefcd3210f65d22ad9328f8ce5f777b0127bb595c089a3a9baed732e7a0c063283a27e8a1430cd11a0e12a38b9790a31fd50bd8065dfb7516383c8e28861ea4b6181ec526bb9a2e24b1a289f48a39e0cda098e3e172e1edd20df5bc62a8aab2ebd70adc50b1a25907472c57b6aab34d63089ffe568137b540bc8d6aeec5a9c921e3d64b38cc6dfbfc94170ec1672d526ec38553943d0fcfd185c40f197ebd59a9b8d1dbada25b9c6d8dfc115023aabda6ef13e2ef55c089c3cd68369e4109b192ab62957e3e53d9b9ff0025d0203010001a3423040300f0603551d130101ff040530030101ff300e0603551d0f0101ff040403020106301d0603551d0e04160414c4a7b1a47b2c71fadbe14b9075ffc41560858910300d06092a864886f70d01010505000382010100a31a2c9b17005ca91eee2866373abf83c73f4bc309a095205de3d95944d23e0d3ebd8a4ba0741fce10829c741a1d7e981addcb134bb32044e491e9ccfc7da5db6ae5fee6fde04eddb7003ab57049aff2e5eb02f1d1028b19cb943a5e48c4181e58195f1e025af00cf1b1ada9dc59868b6ee991f586cafab96633aa595bcee2a7167347cb2bcc99b03748cfe3564bf5cf0f0c723287c6f044bb53726d43f526489a5267b758abfe67767178db0da256141339243185a2a8025a3047e1dd5007bc02099000eb6463609b16bc88c912e6d27d918bf93d328d65b4e97cb15776eac5b62839bf15651cc8f677966a0a8d770bd8910b048e07db29b60aee9d82353510	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	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 SetWindowsHookEx 2 IoCs

Processes:

SO#HKGB05163300~HKGB05163305.exe

pid process

1864 SO#HKGB05163300~HKGB05163305.exe
1864 SO#HKGB05163300~HKGB05163305.exe

pid	process
1864	SO#HKGB05163300~HKGB05163305.exe
1864	SO#HKGB05163300~HKGB05163305.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

SO#HKGB05163300~HKGB05163305.exe

description	pid	process	target process
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	SO#HKGB05163300~HKGB05163305.exe	ieinstal.exe
PID 1864 wrote to memory of 564	1864	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
- Modifies Internet Explorer settings
- Modifies system certificate store
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1864

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Program Files (x86)\internet explorer\ieinstal.exe"
2⤵
PID:564

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

3

T1112

Install Root Certificate

1

T1130

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/564-5-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/564-6-0x0000000000000000-mapping.dmp

Download
memory/564-7-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/564-9-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/564-15-0x0000000010540000-0x0000000010565000-memory.dmp

Filesize
148KB

Download
memory/564-16-0x00000000001C0000-0x00000000001E1000-memory.dmp

Filesize
132KB

Download
memory/1864-2-0x00000000760B1000-0x00000000760B3000-memory.dmp

Filesize
8KB

Download
memory/1864-3-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2020-4-0x000007FEF7810000-0x000007FEF7A8A000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads