limerat | 5209bba177a2075a6c5b1d65906344208405d997f9cab2371b47276d020df858

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16/05/2024, 19:51

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General

Target
4cc6941db410630d3d300a6093932339_JaffaCakes118.exe
Size 1.1MB
Sample240516-ylabesde61
SHA256 5209bba177a2075a6c5b1d65906344208405d997f9cab2371b47276d020df858
MD5 4cc6941db410630d3d300a6093932339
SHA1 eeaa0601427db44c13f687ae4570f6d77fd4a151
SHA512 21208a11a199809cad1dcf53a59d828a21d0e976e41810e9c27fb281b60476ee70cdf7da560c15d4ff715e36c711ac26153122841a45be9cc6fccd0b3c63bc3a
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25M:/h+ZkldoPK8Ya971XjFtAM
MD5 SHA1 SHA512 SSDEEP

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

Extracted

Family

limerat

Attributes

antivm
false
c2_url
https://pastebin.com/raw/cXuQ0V20
download_payload
false
install
false
pin_spread
false
usb_spread
false

Signatures

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

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	sdchange.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	sdchange.exe

Executes dropped EXE 2 IoCs

pid	Process
2100	sdchange.exe
4568	sdchange.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
23	pastebin.com
24	pastebin.com

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 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000a0000000233f3-13.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 724 set thread context of 1604	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	86
PID 2100 set thread context of 1500	2100	sdchange.exe	102
PID 4568 set thread context of 1736	4568	sdchange.exe	113

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 3 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
3512	schtasks.exe
2220	schtasks.exe
1596	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1604	RegAsm.exe
Token: SeDebugPrivilege	1604	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 724 wrote to memory of 1604	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	86
PID 724 wrote to memory of 1604	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	86
PID 724 wrote to memory of 1604	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	86
PID 724 wrote to memory of 1604	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	86
PID 724 wrote to memory of 1604	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	86
PID 724 wrote to memory of 3512	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	87
PID 724 wrote to memory of 3512	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	87
PID 724 wrote to memory of 3512	724	4cc6941db410630d3d300a6093932339_JaffaCakes118.exe	87
PID 2100 wrote to memory of 1500	2100	sdchange.exe	102
PID 2100 wrote to memory of 1500	2100	sdchange.exe	102
PID 2100 wrote to memory of 1500	2100	sdchange.exe	102
PID 2100 wrote to memory of 1500	2100	sdchange.exe	102
PID 2100 wrote to memory of 1500	2100	sdchange.exe	102
PID 2100 wrote to memory of 2220	2100	sdchange.exe	103
PID 2100 wrote to memory of 2220	2100	sdchange.exe	103
PID 2100 wrote to memory of 2220	2100	sdchange.exe	103
PID 4568 wrote to memory of 1736	4568	sdchange.exe	113
PID 4568 wrote to memory of 1736	4568	sdchange.exe	113
PID 4568 wrote to memory of 1736	4568	sdchange.exe	113
PID 4568 wrote to memory of 1736	4568	sdchange.exe	113
PID 4568 wrote to memory of 1736	4568	sdchange.exe	113
PID 4568 wrote to memory of 1596	4568	sdchange.exe	114
PID 4568 wrote to memory of 1596	4568	sdchange.exe	114
PID 4568 wrote to memory of 1596	4568	sdchange.exe	114

C:\Users\Admin\AppData\Local\Temp\4cc6941db410630d3d300a6093932339_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4cc6941db410630d3d300a6093932339_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:724
- 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:1604
- 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:3512

C:\Users\Admin\secinit\sdchange.exe
C:\Users\Admin\secinit\sdchange.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:1500
- 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:2220

C:\Users\Admin\secinit\sdchange.exe
C:\Users\Admin\secinit\sdchange.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4568
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:1736
- 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:1596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

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 fddd88438855577fcc856338a8d6142b81b3c481dcc32f9205a57944fedb07da
MD5 9bdd404ef4a9a95bcaab20e8dcb7058f
SHA1 022645b0903920954ca1fd063cbafe18ce079692
SHA512 6c993c5bb4deb291fb46d5ad263c80410f52a6c0d6158714b70398cd38426304544d436ca6cb8df5447842b30f8e57b36a4e0d38f4fd88c0136786e61c8bef12
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25J:/h+ZkldoPK8Ya971XjFtAJ
MD5 SHA1 SHA512 SSDEEP

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memory/724-0-0x0000000001580000-0x0000000001581000-memory.dmp

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memory/1604-1-0x0000000000400000-0x000000000040C000-memory.dmp

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memory/1604-5-0x0000000074A72000-0x0000000074A73000-memory.dmp

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memory/1604-6-0x0000000074A70000-0x0000000075021000-memory.dmp

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memory/1604-7-0x0000000074A70000-0x0000000075021000-memory.dmp

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memory/1604-10-0x0000000074A70000-0x0000000075021000-memory.dmp

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memory/1604-11-0x0000000074A72000-0x0000000074A73000-memory.dmp

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memory/1604-12-0x0000000074A70000-0x0000000075021000-memory.dmp

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memory/1736-21-0x00000000003F0000-0x00000000003FC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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