remcos | de0d4994a1ad1a24ef1fb67a79be19d78d50d1eb994542ae63385abace8c9b46

General

Target

a1f6790b7576fb5eee8c0dc29d6c1740.exe
Size

1.4MB
MD5

a1f6790b7576fb5eee8c0dc29d6c1740
SHA1

662597c705d33f7c6678e68e9b7d4b964ef1bfe2
SHA256

de0d4994a1ad1a24ef1fb67a79be19d78d50d1eb994542ae63385abace8c9b46
SHA512

443cbdecbd5a45f9468a058d3609ace5f79cf19722599e19b1e5634b616fef6c82edca667bef337f99c0152bf0c6cb3fd07a3381afcaafb2444567dfa53500c8
SSDEEP

24576:46yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6Et:XY9UORVOM1jJHzaiape0hsABFRJch6L5

Score

10^/10

remcos graced rat rezer0 upx

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

GRACED

C2

thankyoulord.ddns.net:5050

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-0S5XD9
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

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

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral2/memory/648-12-0x00000000056B0000-0x00000000056DC000-memory.dmp	rezer0

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

test.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1790404759-2178872477-2616469472-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

648 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1790404759-2178872477-2616469472-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
648	test.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/2828-0-0x0000000000400000-0x00000000006F2000-memory.dmp	upx
behavioral2/memory/2828-27-0x0000000000400000-0x00000000006F2000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

test.exe

description pid process target process

PID 648 set thread context of 2668 648 test.exe vbc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

3212 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

648 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 648 test.exe

description	pid	process	target process
PID 648 set thread context of 2668	648	test.exe	vbc.exe

pid	process
3212	schtasks.exe

pid	process
648	test.exe

description	pid	process
Token: SeDebugPrivilege	648	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

a1f6790b7576fb5eee8c0dc29d6c1740.execmd.exetest.exe

description	pid	process	target process
PID 2828 wrote to memory of 1352	2828	a1f6790b7576fb5eee8c0dc29d6c1740.exe	cmd.exe
PID 2828 wrote to memory of 1352	2828	a1f6790b7576fb5eee8c0dc29d6c1740.exe	cmd.exe
PID 2828 wrote to memory of 1352	2828	a1f6790b7576fb5eee8c0dc29d6c1740.exe	cmd.exe
PID 1352 wrote to memory of 648	1352	cmd.exe	test.exe
PID 1352 wrote to memory of 648	1352	cmd.exe	test.exe
PID 1352 wrote to memory of 648	1352	cmd.exe	test.exe
PID 648 wrote to memory of 3212	648	test.exe	schtasks.exe
PID 648 wrote to memory of 3212	648	test.exe	schtasks.exe
PID 648 wrote to memory of 3212	648	test.exe	schtasks.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe
PID 648 wrote to memory of 2668	648	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\a1f6790b7576fb5eee8c0dc29d6c1740.exe
"C:\Users\Admin\AppData\Local\Temp\a1f6790b7576fb5eee8c0dc29d6c1740.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2828

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:1352

C:\Users\Admin\AppData\Local\Temp\test.exe
test.exe
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:648

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9E15.tmp"
4⤵
- Creates scheduled task(s)
PID:3212

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:2668

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scripting

1

T1064

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\test.exe
Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9E15.tmp
Filesize
1KB

MD5
26f6f1e68aea40762e3922e260890dd9

SHA1
2e058b44228a2aec907d8a414238e7cd25b56612

SHA256
97afbeb3b8472dc5a68045342c3eaa54b998d9815327a96d24c8385d5bd13670

SHA512
18eb664b891d6b7b1ef51b11ae623da57c75c28b63075881bb52cd1798e90c234dc3fe08db7268bcb652844faf183bdc1f0b90fd297f8cecbc1f9f6bc8df1b85

Download Submit
memory/648-24-0x00000000743D0000-0x0000000074B80000-memory.dmp

Filesize
7.7MB

Download
memory/648-5-0x00000000743D0000-0x0000000074B80000-memory.dmp

Filesize
7.7MB

Download
memory/648-6-0x0000000000930000-0x0000000000988000-memory.dmp

Filesize
352KB

Download
memory/648-7-0x0000000005770000-0x0000000005D14000-memory.dmp

Filesize
5.6MB

Download
memory/648-8-0x0000000005260000-0x00000000052F2000-memory.dmp

Filesize
584KB

Download
memory/648-9-0x0000000005240000-0x0000000005250000-memory.dmp

Filesize
64KB

Download
memory/648-10-0x0000000005300000-0x000000000530A000-memory.dmp

Filesize
40KB

Download
memory/648-11-0x0000000005250000-0x0000000005258000-memory.dmp

Filesize
32KB

Download
memory/648-12-0x00000000056B0000-0x00000000056DC000-memory.dmp

Filesize
176KB

Download
memory/648-13-0x0000000005EC0000-0x0000000005F5C000-memory.dmp

Filesize
624KB

Download
memory/2668-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-35-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-39-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-43-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2668-53-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2828-0-0x0000000000400000-0x00000000006F2000-memory.dmp

Filesize
2.9MB

Download
memory/2828-27-0x0000000000400000-0x00000000006F2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads