limerat | e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969

Analysis

max time kernel
156s
max time network
174s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
08/05/2022, 05:58

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe
Size 1.1MB
Sample220508-gph93aggc6
SHA256 e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969
MD5 1f656aa836d6c64f8f6ae502c4e0aa93
SHA1 cb75d189d6858f3566fbdbf8c40f17482d9973ec
SHA512 7429a53dc2a9928940da5c81958cf8a3cf2b432f929dbbb3695b7536520b802279bdd0903b9fe80c35e90aa265648775a9732b4a7f60a6be08affde617a16078
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
4328	sdchange.exe
2436	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-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	sdchange.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\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/0x0006000000022ec2-137.dat	autoit_exe
behavioral2/files/0x0006000000022ec2-138.dat	autoit_exe
behavioral2/files/0x0006000000022ec2-146.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4676 set thread context of 4940	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	83
PID 4328 set thread context of 4980	4328	sdchange.exe	100
PID 2436 set thread context of 4084	2436	sdchange.exe	106

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
116	schtasks.exe
1144	schtasks.exe
1872	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4940	RegAsm.exe
Token: SeDebugPrivilege	4940	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4676 wrote to memory of 4940	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	83
PID 4676 wrote to memory of 4940	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	83
PID 4676 wrote to memory of 4940	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	83
PID 4676 wrote to memory of 4940	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	83
PID 4676 wrote to memory of 4940	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	83
PID 4676 wrote to memory of 116	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	87
PID 4676 wrote to memory of 116	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	87
PID 4676 wrote to memory of 116	4676	e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe	87
PID 4328 wrote to memory of 4980	4328	sdchange.exe	100
PID 4328 wrote to memory of 4980	4328	sdchange.exe	100
PID 4328 wrote to memory of 4980	4328	sdchange.exe	100
PID 4328 wrote to memory of 4980	4328	sdchange.exe	100
PID 4328 wrote to memory of 4980	4328	sdchange.exe	100
PID 4328 wrote to memory of 1144	4328	sdchange.exe	101
PID 4328 wrote to memory of 1144	4328	sdchange.exe	101
PID 4328 wrote to memory of 1144	4328	sdchange.exe	101
PID 2436 wrote to memory of 4084	2436	sdchange.exe	106
PID 2436 wrote to memory of 4084	2436	sdchange.exe	106
PID 2436 wrote to memory of 4084	2436	sdchange.exe	106
PID 2436 wrote to memory of 4084	2436	sdchange.exe	106
PID 2436 wrote to memory of 4084	2436	sdchange.exe	106
PID 2436 wrote to memory of 1872	2436	sdchange.exe	107
PID 2436 wrote to memory of 1872	2436	sdchange.exe	107
PID 2436 wrote to memory of 1872	2436	sdchange.exe	107

C:\Users\Admin\AppData\Local\Temp\e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe
"C:\Users\Admin\AppData\Local\Temp\e5f1c038bac43cc3b45946f3bfd02b6fe78c0748af55391238bb6e4400410969.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4676
- 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:4940
- 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:116

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:4328
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:4980
- 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:1144

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:2436
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:4084
- 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:1872

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

Replay Monitor

Loading Replay Monitor...

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

Submit Download

sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 3a79b8f03578fd929135741da5341d43b5c9578b64899b3e69610d825d2247df
MD5 da25e529751b127cc64e3ad8a25122f0
SHA1 08c8109cae3c020344711169783a00248db927f2
SHA512 292be15032a48c3598ca4ca4dae9cb0b66acd84658c631ad3dc449f49fe33b8ba430a638fc2828f4b9cd5125e5e99be5ffe352476995b3886a199fe7b375506e
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25u:/h+ZkldoPK8Ya971XjFtAu
MD5 SHA1 SHA512 SSDEEP

Submit Download

sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 3a79b8f03578fd929135741da5341d43b5c9578b64899b3e69610d825d2247df
MD5 da25e529751b127cc64e3ad8a25122f0
SHA1 08c8109cae3c020344711169783a00248db927f2
SHA512 292be15032a48c3598ca4ca4dae9cb0b66acd84658c631ad3dc449f49fe33b8ba430a638fc2828f4b9cd5125e5e99be5ffe352476995b3886a199fe7b375506e
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25u:/h+ZkldoPK8Ya971XjFtAu
MD5 SHA1 SHA512 SSDEEP

Submit Download

sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 3a79b8f03578fd929135741da5341d43b5c9578b64899b3e69610d825d2247df
MD5 da25e529751b127cc64e3ad8a25122f0
SHA1 08c8109cae3c020344711169783a00248db927f2
SHA512 292be15032a48c3598ca4ca4dae9cb0b66acd84658c631ad3dc449f49fe33b8ba430a638fc2828f4b9cd5125e5e99be5ffe352476995b3886a199fe7b375506e
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25u:/h+ZkldoPK8Ya971XjFtAu
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4084-154-0x0000000074900000-0x0000000074EB1000-memory.dmp

Download

memory/4084-148-0x0000000000190000-0x000000000019C000-memory.dmp

Download

memory/4940-136-0x0000000074900000-0x0000000074EB1000-memory.dmp

Download

memory/4940-131-0x0000000000400000-0x000000000040C000-memory.dmp

Download

memory/4980-144-0x0000000074900000-0x0000000074EB1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads