limerat | 05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
12/05/2022, 11:45

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General

Target
05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe
Size 1.1MB
Sample220512-nwqfaadbd4
SHA256 05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e
MD5 0c481e53c5824b63f39960ce0a17c764
SHA1 3449d836a6e5b395696e3e676785ec42d9458b4c
SHA512 59af65cb030c0e9730597047066cff5c4727b466130df3ecfbfb2b22a9b0f3bc11ca8500014c9459fa3196085c024dc23fb0b32656981aae0d4e4dd282a34312
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
4716	sdchange.exe
4828	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-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	sdchange.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\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/0x00060000000231d0-137.dat	autoit_exe
behavioral2/files/0x00060000000231d0-138.dat	autoit_exe
behavioral2/files/0x00060000000231d0-146.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2480 set thread context of 5020	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	81
PID 4716 set thread context of 4916	4716	sdchange.exe	86
PID 4828 set thread context of 5032	4828	sdchange.exe	96

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
2728	schtasks.exe
4476	schtasks.exe
3872	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5020	RegAsm.exe
Token: SeDebugPrivilege	5020	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2480 wrote to memory of 5020	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	81
PID 2480 wrote to memory of 5020	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	81
PID 2480 wrote to memory of 5020	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	81
PID 2480 wrote to memory of 5020	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	81
PID 2480 wrote to memory of 5020	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	81
PID 2480 wrote to memory of 2728	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	83
PID 2480 wrote to memory of 2728	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	83
PID 2480 wrote to memory of 2728	2480	05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe	83
PID 4716 wrote to memory of 4916	4716	sdchange.exe	86
PID 4716 wrote to memory of 4916	4716	sdchange.exe	86
PID 4716 wrote to memory of 4916	4716	sdchange.exe	86
PID 4716 wrote to memory of 4916	4716	sdchange.exe	86
PID 4716 wrote to memory of 4916	4716	sdchange.exe	86
PID 4716 wrote to memory of 4476	4716	sdchange.exe	88
PID 4716 wrote to memory of 4476	4716	sdchange.exe	88
PID 4716 wrote to memory of 4476	4716	sdchange.exe	88
PID 4828 wrote to memory of 5032	4828	sdchange.exe	96
PID 4828 wrote to memory of 5032	4828	sdchange.exe	96
PID 4828 wrote to memory of 5032	4828	sdchange.exe	96
PID 4828 wrote to memory of 5032	4828	sdchange.exe	96
PID 4828 wrote to memory of 5032	4828	sdchange.exe	96
PID 4828 wrote to memory of 3872	4828	sdchange.exe	97
PID 4828 wrote to memory of 3872	4828	sdchange.exe	97
PID 4828 wrote to memory of 3872	4828	sdchange.exe	97

C:\Users\Admin\AppData\Local\Temp\05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe
"C:\Users\Admin\AppData\Local\Temp\05c772b7839a921008f2773976257df1a0fa02d7be0650f6357c14148fef350e.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2480
- 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:5020
- 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:2728

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:4716
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:4916
- 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:4476

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:4828
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:5032
- 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:3872

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 4157b38c71dfe7d7c67909f419d1276d5f4933fb21eaaa748a92b34e2647c00d
MD5 e20a93d01913f18413b39488ac9fe1d1
SHA1 eaa3f640227148dd992350b32f5ab1e6fcddad16
SHA512 683117b250d20c8b88fdc0498b85ef6e5fc093ebb3ca2646ef31fe96f8e3d6326965948e9958a193bb55229ecfcd848eb9d4fd957ff5b7a18c1a2a5b5a43674e
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25Y:/h+ZkldoPK8Ya971XjFtAY
MD5 SHA1 SHA512 SSDEEP

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sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 4157b38c71dfe7d7c67909f419d1276d5f4933fb21eaaa748a92b34e2647c00d
MD5 e20a93d01913f18413b39488ac9fe1d1
SHA1 eaa3f640227148dd992350b32f5ab1e6fcddad16
SHA512 683117b250d20c8b88fdc0498b85ef6e5fc093ebb3ca2646ef31fe96f8e3d6326965948e9958a193bb55229ecfcd848eb9d4fd957ff5b7a18c1a2a5b5a43674e
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25Y:/h+ZkldoPK8Ya971XjFtAY
MD5 SHA1 SHA512 SSDEEP

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sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 4157b38c71dfe7d7c67909f419d1276d5f4933fb21eaaa748a92b34e2647c00d
MD5 e20a93d01913f18413b39488ac9fe1d1
SHA1 eaa3f640227148dd992350b32f5ab1e6fcddad16
SHA512 683117b250d20c8b88fdc0498b85ef6e5fc093ebb3ca2646ef31fe96f8e3d6326965948e9958a193bb55229ecfcd848eb9d4fd957ff5b7a18c1a2a5b5a43674e
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25Y:/h+ZkldoPK8Ya971XjFtAY
MD5 SHA1 SHA512 SSDEEP

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memory/4916-144-0x0000000073690000-0x0000000073C41000-memory.dmp

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memory/5020-136-0x0000000073690000-0x0000000073C41000-memory.dmp

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memory/5020-131-0x0000000000400000-0x000000000040C000-memory.dmp

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memory/5032-148-0x00000000007C0000-0x00000000007CC000-memory.dmp

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memory/5032-154-0x0000000073690000-0x0000000073C41000-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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