limerat | 6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3

Analysis

max time kernel
161s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
12/05/2022, 11:44

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General

Target
6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe
Size 1.1MB
Sample220512-nwf7lsfhhn
SHA256 6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3
MD5 09207b17856243f5db24fce5353d5d63
SHA1 68c750485959e707adc2a613347215e72ece2354
SHA512 6083692488706c84072875c742f86b0fec00bb467f9e04a43135c6bd954ad595da2e9582aa5a63cdce1a0abe1160fcb4c25562152e2d8840b7527ad97113c964
MD5 SHA1 SHA512

Score

10^/10

limerat rat

Malware Config

Extracted

Family

limerat

Wallets

1JBKLGyE6AnRGvk92A8x3m8qmXfh3fcEty

Attributes

aes_key
nulled
antivm
true
c2_url
https://pastebin.com/raw/cXuQ0V20
delay
3
download_payload
false
install
false
install_name
Winservices.exe
main_folder
AppData
pin_spread
false
sub_folder
\
usb_spread
true

Signatures

LimeRAT
Simple yet powerful RAT for Windows machines written in .NET.
rat limerat

Executes dropped EXE 2 IoCs

pid	Process
4776	sdchange.exe
4968	sdchange.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	sdchange.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	sdchange.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	RegAsm.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0006000000022e41-137.dat	autoit_exe
behavioral2/files/0x0006000000022e41-138.dat	autoit_exe
behavioral2/files/0x0006000000022e41-146.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2680 set thread context of 4460	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	86
PID 4776 set thread context of 4032	4776	sdchange.exe	94
PID 4968 set thread context of 1012	4968	sdchange.exe	105

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
764	schtasks.exe
4332	schtasks.exe
2424	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4032	RegAsm.exe
Token: SeDebugPrivilege	4032	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 4460	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	86
PID 2680 wrote to memory of 4460	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	86
PID 2680 wrote to memory of 4460	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	86
PID 2680 wrote to memory of 4460	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	86
PID 2680 wrote to memory of 4460	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	86
PID 2680 wrote to memory of 2424	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	90
PID 2680 wrote to memory of 2424	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	90
PID 2680 wrote to memory of 2424	2680	6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe	90
PID 4776 wrote to memory of 4032	4776	sdchange.exe	94
PID 4776 wrote to memory of 4032	4776	sdchange.exe	94
PID 4776 wrote to memory of 4032	4776	sdchange.exe	94
PID 4776 wrote to memory of 4032	4776	sdchange.exe	94
PID 4776 wrote to memory of 4032	4776	sdchange.exe	94
PID 4776 wrote to memory of 764	4776	sdchange.exe	95
PID 4776 wrote to memory of 764	4776	sdchange.exe	95
PID 4776 wrote to memory of 764	4776	sdchange.exe	95
PID 4968 wrote to memory of 1012	4968	sdchange.exe	105
PID 4968 wrote to memory of 1012	4968	sdchange.exe	105
PID 4968 wrote to memory of 1012	4968	sdchange.exe	105
PID 4968 wrote to memory of 1012	4968	sdchange.exe	105
PID 4968 wrote to memory of 1012	4968	sdchange.exe	105
PID 4968 wrote to memory of 4332	4968	sdchange.exe	106
PID 4968 wrote to memory of 4332	4968	sdchange.exe	106
PID 4968 wrote to memory of 4332	4968	sdchange.exe	106

C:\Users\Admin\AppData\Local\Temp\6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe
"C:\Users\Admin\AppData\Local\Temp\6556a3f7322ae73fcecf30dc5ac853c952aba5e1d91cf91d78496919ab377ed3.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:4460
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SettingSyncHost /tr "C:\Users\Admin\secinit\sdchange.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:2424

C:\Users\Admin\secinit\sdchange.exe
C:\Users\Admin\secinit\sdchange.exe
1⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4776
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  - Maps connected drives based on registry
  - Suspicious use of AdjustPrivilegeToken
  PID:4032
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SettingSyncHost /tr "C:\Users\Admin\secinit\sdchange.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:764

C:\Users\Admin\secinit\sdchange.exe
C:\Users\Admin\secinit\sdchange.exe
1⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:1012
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SettingSyncHost /tr "C:\Users\Admin\secinit\sdchange.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:4332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

RegAsm.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\RegAsm.exe.log
Size 316B
SHA256 8a7cb420c82edf1bb2c7bdfef52091e5169fabaecc370e120985e91406fcbbec
MD5 9f893d94b017a0684012d50319c9ffbe
SHA1 140cc2cb6b2520ba4f9a1f666a5f679853472793
SHA512 4b7df94d3622b82d852b0f532d7fd810ca2113d7b737ec417023d5b2142e9e79414a06d22647d73f8bc114f8e871a3a741a479b0aba48892f9078975ec78acba
MD5 SHA1 SHA512

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sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 28ff2eb983f4318bcf06b9e9cca68c938c1d291fc7cc4465c72d7c3bb8738dc7
MD5 f863e1ad7ff44cf6bc49a3bb5499e392
SHA1 f7052b9e31b0a994ddf5d8b6867c0100ed3c7916
SHA512 3ac6e5ef28ba271e8b9aa65ce134375349c86bd25b04a3062a45d0cde6c813741bef0624ab44a6eff2044ecf49ef1485dd4bef0f966d308a8a9ccfe9970e4745
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25X:/h+ZkldoPK8Ya971XjFtAX
MD5 SHA1 SHA512 SSDEEP

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sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 28ff2eb983f4318bcf06b9e9cca68c938c1d291fc7cc4465c72d7c3bb8738dc7
MD5 f863e1ad7ff44cf6bc49a3bb5499e392
SHA1 f7052b9e31b0a994ddf5d8b6867c0100ed3c7916
SHA512 3ac6e5ef28ba271e8b9aa65ce134375349c86bd25b04a3062a45d0cde6c813741bef0624ab44a6eff2044ecf49ef1485dd4bef0f966d308a8a9ccfe9970e4745
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25X:/h+ZkldoPK8Ya971XjFtAX
MD5 SHA1 SHA512 SSDEEP

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sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 28ff2eb983f4318bcf06b9e9cca68c938c1d291fc7cc4465c72d7c3bb8738dc7
MD5 f863e1ad7ff44cf6bc49a3bb5499e392
SHA1 f7052b9e31b0a994ddf5d8b6867c0100ed3c7916
SHA512 3ac6e5ef28ba271e8b9aa65ce134375349c86bd25b04a3062a45d0cde6c813741bef0624ab44a6eff2044ecf49ef1485dd4bef0f966d308a8a9ccfe9970e4745
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25X:/h+ZkldoPK8Ya971XjFtAX
MD5 SHA1 SHA512 SSDEEP

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memory/1012-154-0x00000000739C0000-0x0000000073F71000-memory.dmp

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memory/4032-145-0x00000000739C0000-0x0000000073F71000-memory.dmp

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memory/4032-140-0x0000000000150000-0x000000000015C000-memory.dmp

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memory/4460-135-0x00000000739C0000-0x0000000073F71000-memory.dmp

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memory/4460-131-0x0000000000400000-0x000000000040C000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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