xtremerat | 080473b13a294961678932c9b543a55695995da095fbe446d2b7419ba894f618

General

Target

msndll.exe
Size

119KB
MD5

444af42eedf1678eba46eb04aa3310dd
SHA1

7e3d7e95820dce4ed0b2775123513fe40463332b
SHA256

438e621864ee31ab757e92ef4e5120d2a8142fcd650d10f992cedfa236ea3064
SHA512

b7656360ff7556589e20bc9dea5fe58dafd1e1ed7546892ce5fbadb84d24a15a234251729272a3730f42a870b8d16e87f52946a657a9272ff92a8dbedebf8d2e
SSDEEP

1536:pOF7+/JyYNWJ85KSUav8lnpmVdhcHgWm1o+Uam5w01yKb:pOFS/IYNWSwSUZmnmAr157m5Z1/

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Extracted

Family

xtremerat

C2

mikropbisey.no-ip.biz

Signatures

Detect XtremeRAT payload 4 IoCs

resource	yara_rule
behavioral4/memory/1536-5-0x0000000010000000-0x000000001004B000-memory.dmp	family_xtremerat
behavioral4/memory/1164-7-0x0000000010000000-0x000000001004B000-memory.dmp	family_xtremerat
behavioral4/memory/1536-8-0x0000000010000000-0x000000001004B000-memory.dmp	family_xtremerat
behavioral4/memory/1164-9-0x0000000010000000-0x000000001004B000-memory.dmp	family_xtremerat

XtremeRAT
The XtremeRAT was developed by xtremecoder and has been available since at least 2010, and written in Delphi.
persistence spyware rat xtremerat
Xtremerat family
xtremerat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4308 set thread context of 1536	4308	msndll.exe	83

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral4/memory/1536-2-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral4/memory/1536-4-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral4/memory/1536-5-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral4/memory/1536-6-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral4/memory/1164-7-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral4/memory/1536-8-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral4/memory/1164-9-0x0000000010000000-0x000000001004B000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
60	1164	WerFault.exe	84
4468	1164	WerFault.exe	84

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msndll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msndll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4308	msndll.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 4308 wrote to memory of 1536	4308	msndll.exe	83
PID 1536 wrote to memory of 1164	1536	msndll.exe	84
PID 1536 wrote to memory of 1164	1536	msndll.exe	84
PID 1536 wrote to memory of 1164	1536	msndll.exe	84
PID 1536 wrote to memory of 1164	1536	msndll.exe	84
PID 1536 wrote to memory of 3480	1536	msndll.exe	85
PID 1536 wrote to memory of 3480	1536	msndll.exe	85
PID 1536 wrote to memory of 3480	1536	msndll.exe	85

C:\Users\Admin\AppData\Local\Temp\msndll.exe
"C:\Users\Admin\AppData\Local\Temp\msndll.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Users\Admin\AppData\Local\Temp\msndll.exe
  C:\Users\Admin\AppData\Local\Temp\msndll.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1536
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1164
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1164 -s 480
      4⤵
      Program crash
      PID:60
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1164 -s 500
      4⤵
      Program crash
      PID:4468
- - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    3⤵
    PID:3480

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1164 -ip 1164
1⤵
PID:3540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1164 -ip 1164
1⤵
PID:4052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1164-7-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/1164-9-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/1536-2-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/1536-4-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/1536-5-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/1536-6-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/1536-8-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download

Analysis

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