limerat | f46f42d48bccbc1ddf2758cac437b81e6d6c6d3e920d29ef2cbe627cc6a5f89f

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 07:53

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General

Target
c819e2b4d2c91d98aae0304c1ff5aa38.exe
Size 1.1MB
Sample240314-jree1age46
SHA256 f46f42d48bccbc1ddf2758cac437b81e6d6c6d3e920d29ef2cbe627cc6a5f89f
MD5 c819e2b4d2c91d98aae0304c1ff5aa38
SHA1 5bf1b2d544e7e4cce5f082d19e5e48def970bb83
SHA512 cfa54d31df64f8776d12696b59368eee5653c2249429f771f79565c30a3f652331f8ec24638cd2c522bd4d8a32682634a3d3c0b518ad3ce4e923fcb5916beeda
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25t:/h+ZkldoPK8Ya971XjFtAt
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 4 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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	c819e2b4d2c91d98aae0304c1ff5aa38.exe
Key value queried	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	sdchange.exe
Key value queried	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	sdchange.exe
Key value queried	\REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	sdchange.exe

Executes dropped EXE 3 IoCs

pid	Process
3656	sdchange.exe
1176	sdchange.exe
3236	sdchange.exe

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

Web Service

T1102

flow	ioc
36	pastebin.com
35	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/0x000a00000002318e-10.dat	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1492 set thread context of 3800	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	92
PID 3656 set thread context of 1988	3656	sdchange.exe	99
PID 1176 set thread context of 4012	1176	sdchange.exe	113
PID 3236 set thread context of 2004	3236	sdchange.exe	123

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 4 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
1276	schtasks.exe
3116	schtasks.exe
1892	schtasks.exe
4300	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3800	RegAsm.exe
Token: SeDebugPrivilege	3800	RegAsm.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 3800	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	92
PID 1492 wrote to memory of 3800	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	92
PID 1492 wrote to memory of 3800	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	92
PID 1492 wrote to memory of 3800	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	92
PID 1492 wrote to memory of 3800	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	92
PID 1492 wrote to memory of 1276	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	93
PID 1492 wrote to memory of 1276	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	93
PID 1492 wrote to memory of 1276	1492	c819e2b4d2c91d98aae0304c1ff5aa38.exe	93
PID 3656 wrote to memory of 1988	3656	sdchange.exe	99
PID 3656 wrote to memory of 1988	3656	sdchange.exe	99
PID 3656 wrote to memory of 1988	3656	sdchange.exe	99
PID 3656 wrote to memory of 1988	3656	sdchange.exe	99
PID 3656 wrote to memory of 1988	3656	sdchange.exe	99
PID 3656 wrote to memory of 3116	3656	sdchange.exe	100
PID 3656 wrote to memory of 3116	3656	sdchange.exe	100
PID 3656 wrote to memory of 3116	3656	sdchange.exe	100
PID 1176 wrote to memory of 4012	1176	sdchange.exe	113
PID 1176 wrote to memory of 4012	1176	sdchange.exe	113
PID 1176 wrote to memory of 4012	1176	sdchange.exe	113
PID 1176 wrote to memory of 4012	1176	sdchange.exe	113
PID 1176 wrote to memory of 4012	1176	sdchange.exe	113
PID 1176 wrote to memory of 1892	1176	sdchange.exe	114
PID 1176 wrote to memory of 1892	1176	sdchange.exe	114
PID 1176 wrote to memory of 1892	1176	sdchange.exe	114
PID 3236 wrote to memory of 2004	3236	sdchange.exe	123
PID 3236 wrote to memory of 2004	3236	sdchange.exe	123
PID 3236 wrote to memory of 2004	3236	sdchange.exe	123
PID 3236 wrote to memory of 2004	3236	sdchange.exe	123
PID 3236 wrote to memory of 2004	3236	sdchange.exe	123
PID 3236 wrote to memory of 4300	3236	sdchange.exe	124
PID 3236 wrote to memory of 4300	3236	sdchange.exe	124
PID 3236 wrote to memory of 4300	3236	sdchange.exe	124

C:\Users\Admin\AppData\Local\Temp\c819e2b4d2c91d98aae0304c1ff5aa38.exe
"C:\Users\Admin\AppData\Local\Temp\c819e2b4d2c91d98aae0304c1ff5aa38.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1492
- 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:3800
- 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:1276

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:3656
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:1988
- 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:3116

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:1176
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:4012
- 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:1892

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:3236
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  PID:2004
- 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:4300

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 69961eb28015c4ad525e5ef2f236262130c0e19d95a9660788726e5960de9399
MD5 e10d368f33b1b0d03efc001f8ddd0759
SHA1 8f535181286052b0d9e304e2b91984fa3b50bce6
SHA512 54e1fc5e71f717183e28dc6d0228b0aef0a7c4c061a5bf6387d765456017ed11652873b9a63c26bcaed1edfa7cdeae6a5db28fd4ad6d15128d8aa20b9ff4ce7f
SSDEEP 24576:4AHnh+eWsN3skA4RV1Hom2KXMmHa97aWtjzjFtuM25i:/h+ZkldoPK8Ya971XjFtAi
MD5 SHA1 SHA512 SSDEEP

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memory/1492-0-0x00000000033B0000-0x00000000033B1000-memory.dmp

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memory/1988-21-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/1988-12-0x0000000000780000-0x000000000078C000-memory.dmp

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memory/1988-16-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/1988-17-0x00000000025F0000-0x0000000002600000-memory.dmp

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memory/1988-18-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/2004-40-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/2004-43-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/2004-42-0x0000000000A60000-0x0000000000A70000-memory.dmp

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memory/2004-41-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/3800-23-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/3800-24-0x0000000001200000-0x0000000001210000-memory.dmp

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memory/3800-1-0x0000000000400000-0x000000000040C000-memory.dmp

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memory/3800-7-0x0000000001200000-0x0000000001210000-memory.dmp

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memory/3800-22-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/3800-5-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/3800-6-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/4012-32-0x0000000001540000-0x0000000001550000-memory.dmp

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memory/4012-31-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/4012-33-0x0000000074970000-0x0000000074F21000-memory.dmp

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memory/4012-34-0x0000000074970000-0x0000000074F21000-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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