xtremerat | 838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958

General

Target

838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe
Size

65KB
MD5

e56933481e08daa34c129c24f9a4fc81
SHA1

9f4c8f786bab70abd4463edfb66a4a4762e4285d
SHA256

838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958
SHA512

35b4bb49c4467525fc75abf5ecf389ecdea22ff72d7819c755ca54292630530fce52b0c6196bc4417620ec3653a3da836ffe67a975e72c17eed777edfd9e3480
SSDEEP

1536:72WyRaJJ62M6hwYvckT7aNxhBs+BTf8o5Vomfu:7qOrPvPT70xhBs+9fvOmfu

Score

10^/10

xtremerat persistence rat spyware upx

Malware Config

Extracted

Family

xtremerat

C2

xstrema.no-ip.org

Signatures

Detect XtremeRAT payload 4 IoCs

resource	yara_rule
behavioral2/memory/3476-138-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/2396-139-0x0000000000000000-mapping.dmp	family_xtremerat
behavioral2/memory/2396-141-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/3476-140-0x0000000010000000-0x000000001004D000-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

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3476-135-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/3476-137-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/3476-138-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/2396-141-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/3476-140-0x0000000010000000-0x000000001004D000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4828 set thread context of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80

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

System Information Discovery
T1082

Program crash 3 IoCs

pid	pid_target	Process	procid_target
2284	4828	WerFault.exe	79
1788	2396	WerFault.exe	83
3760	2396	WerFault.exe	83

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 4828 wrote to memory of 3476	4828	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	80
PID 3476 wrote to memory of 2396	3476	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	83
PID 3476 wrote to memory of 2396	3476	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	83
PID 3476 wrote to memory of 2396	3476	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	83
PID 3476 wrote to memory of 2396	3476	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	83
PID 3476 wrote to memory of 2888	3476	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	85
PID 3476 wrote to memory of 2888	3476	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	85
PID 3476 wrote to memory of 2888	3476	838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe	85

C:\Users\Admin\AppData\Local\Temp\838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe
"C:\Users\Admin\AppData\Local\Temp\838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Users\Admin\AppData\Local\Temp\838a345bc007a981b97e9579b8ee78d7dfc5f717619fab47229efc5ffc5e7958.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3476
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    PID:2396
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2396 -s 480
      4⤵
      Program crash
      PID:1788
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2396 -s 488
      4⤵
      Program crash
      PID:3760
- - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    3⤵
    PID:2888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4828 -s 480
  2⤵
  - Program crash
  PID:2284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4828 -ip 4828
1⤵
PID:2576

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2396 -ip 2396
1⤵
PID:3188

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2396 -ip 2396
1⤵
PID:5024

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2396-141-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/3476-135-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/3476-137-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/3476-138-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/3476-140-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download

Analysis

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