limerat | 97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1

Analysis

max time kernel
186s
max time network
198s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
08/05/2022, 05:59

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General

Target
97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe
Size 1.1MB
Sample220508-gpvcbsbgaq
SHA256 97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1
MD5 1a888bb782fb315674193846015b240c
SHA1 6856d1881793432c3f2f381b9f1196051d227b5f
SHA512 b2782f0b20aa1f3b49c3a1451a331ccb7518203980f93c4be95c9783db47502d0109372096103c82712283d1282075dd09dedd08a0b798aa3c021ca4846732fe
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
4340	sdchange.exe
3576	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	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.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/0x00060000000231d9-137.dat	autoit_exe
behavioral2/files/0x00060000000231d9-138.dat	autoit_exe
behavioral2/files/0x00060000000231d9-146.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2408 set thread context of 4000	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	80
PID 4340 set thread context of 4208	4340	sdchange.exe	84
PID 3576 set thread context of 3284	3576	sdchange.exe	91

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
4120	schtasks.exe
4228	schtasks.exe
2960	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4000	RegAsm.exe
Token: SeDebugPrivilege	4000	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2408 wrote to memory of 4000	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	80
PID 2408 wrote to memory of 4000	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	80
PID 2408 wrote to memory of 4000	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	80
PID 2408 wrote to memory of 4000	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	80
PID 2408 wrote to memory of 4000	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	80
PID 2408 wrote to memory of 4120	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	81
PID 2408 wrote to memory of 4120	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	81
PID 2408 wrote to memory of 4120	2408	97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe	81
PID 4340 wrote to memory of 4208	4340	sdchange.exe	84
PID 4340 wrote to memory of 4208	4340	sdchange.exe	84
PID 4340 wrote to memory of 4208	4340	sdchange.exe	84
PID 4340 wrote to memory of 4208	4340	sdchange.exe	84
PID 4340 wrote to memory of 4208	4340	sdchange.exe	84
PID 4340 wrote to memory of 4228	4340	sdchange.exe	85
PID 4340 wrote to memory of 4228	4340	sdchange.exe	85
PID 4340 wrote to memory of 4228	4340	sdchange.exe	85
PID 3576 wrote to memory of 3284	3576	sdchange.exe	91
PID 3576 wrote to memory of 3284	3576	sdchange.exe	91
PID 3576 wrote to memory of 3284	3576	sdchange.exe	91
PID 3576 wrote to memory of 3284	3576	sdchange.exe	91
PID 3576 wrote to memory of 3284	3576	sdchange.exe	91
PID 3576 wrote to memory of 2960	3576	sdchange.exe	92
PID 3576 wrote to memory of 2960	3576	sdchange.exe	92
PID 3576 wrote to memory of 2960	3576	sdchange.exe	92

C:\Users\Admin\AppData\Local\Temp\97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe
"C:\Users\Admin\AppData\Local\Temp\97b2c6a744f0269d45e728f89ec3374b103e8920b22300f0cabd54efc47f54b1.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2408
- 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:4000
- 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:4120

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:4340
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:4208
- 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:4228

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:3576
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:3284
- 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:2960

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 96be6f8e9b5662ef2619fc5f9456a60ff099ff904427693c7f0b2f0c10d31139
MD5 cf9556e55f820c4bdeb16942de9cc071
SHA1 def461a6f3d4dedc5593170a8befd9a71cf7ea3a
SHA512 db915bff2f2563f3cfc5899542bbb56341b993714ca1a518b2cb9e4ba146e32e9bd05ab2782f7e114d0b202ad83bb44cd3a7410333175d4e6611c2b27bc04386
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25h:/h+ZkldoPK8Ya971XjFtAh
MD5 SHA1 SHA512 SSDEEP

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sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 96be6f8e9b5662ef2619fc5f9456a60ff099ff904427693c7f0b2f0c10d31139
MD5 cf9556e55f820c4bdeb16942de9cc071
SHA1 def461a6f3d4dedc5593170a8befd9a71cf7ea3a
SHA512 db915bff2f2563f3cfc5899542bbb56341b993714ca1a518b2cb9e4ba146e32e9bd05ab2782f7e114d0b202ad83bb44cd3a7410333175d4e6611c2b27bc04386
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25h:/h+ZkldoPK8Ya971XjFtAh
MD5 SHA1 SHA512 SSDEEP

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sdchange.exe

Path C:\Users\Admin\secinit\sdchange.exe
Size 1.1MB
SHA256 96be6f8e9b5662ef2619fc5f9456a60ff099ff904427693c7f0b2f0c10d31139
MD5 cf9556e55f820c4bdeb16942de9cc071
SHA1 def461a6f3d4dedc5593170a8befd9a71cf7ea3a
SHA512 db915bff2f2563f3cfc5899542bbb56341b993714ca1a518b2cb9e4ba146e32e9bd05ab2782f7e114d0b202ad83bb44cd3a7410333175d4e6611c2b27bc04386
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25h:/h+ZkldoPK8Ya971XjFtAh
MD5 SHA1 SHA512 SSDEEP

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memory/3284-148-0x00000000005B0000-0x00000000005BC000-memory.dmp

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memory/3284-154-0x0000000073C40000-0x00000000741F1000-memory.dmp

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memory/4000-131-0x0000000000400000-0x000000000040C000-memory.dmp

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memory/4000-135-0x0000000073C40000-0x00000000741F1000-memory.dmp

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memory/4208-145-0x0000000073C40000-0x00000000741F1000-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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