xtremerat | 178505b0fe241c1e1e404e8258b460a3435acfba0434052dd2aec363aff7a0c8

General

Target

a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
Size

139KB
MD5

a90a788f257fcb6fb27f2add6c966340
SHA1

963c8589e873f43f984db75c01b5e8ba5acfd172
SHA256

178505b0fe241c1e1e404e8258b460a3435acfba0434052dd2aec363aff7a0c8
SHA512

684f5f8b14e83a0e820676a2ef21918f7adfc63be3274a5a3376f96386d7a7c0add06791759f81cd289db0da6a706055ea040009ce7a0c746e533ae6d1a252d9
SSDEEP

3072:G/v7xIj0jsCpbDRheP5AQ8JSR+VnI14xn0azFRZ0IJxtSO3TvRdr:MdJjrpfuESR+VnIyx1zFRPxjNdr

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Extracted

Family

xtremerat

C2

vista054.no-ip.biz

Signatures

Detect XtremeRAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/5032-22-0x0000000010000000-0x000000001005D000-memory.dmp	family_xtremerat
behavioral2/memory/4992-23-0x0000000010000000-0x000000001005D000-memory.dmp	family_xtremerat
behavioral2/memory/5032-24-0x0000000010000000-0x000000001005D000-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

Checks computer location settings 2 TTPs 1 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
4992	123server.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023b6b-17.dat	upx
behavioral2/memory/4992-20-0x0000000010000000-0x000000001005D000-memory.dmp	upx
behavioral2/memory/5032-22-0x0000000010000000-0x000000001005D000-memory.dmp	upx
behavioral2/memory/4992-23-0x0000000010000000-0x000000001005D000-memory.dmp	upx
behavioral2/memory/5032-24-0x0000000010000000-0x000000001005D000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
File created	C:\Windows\assembly\Desktop.ini	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe

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
4860	5032	WerFault.exe	83
3864	5032	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 2 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	123server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
Token: 33	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
Token: 33	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3224 wrote to memory of 4992	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe	82
PID 3224 wrote to memory of 4992	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe	82
PID 3224 wrote to memory of 4992	3224	a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe	82
PID 4992 wrote to memory of 5032	4992	123server.exe	83
PID 4992 wrote to memory of 5032	4992	123server.exe	83
PID 4992 wrote to memory of 5032	4992	123server.exe	83
PID 4992 wrote to memory of 5032	4992	123server.exe	83
PID 4992 wrote to memory of 2700	4992	123server.exe	84
PID 4992 wrote to memory of 2700	4992	123server.exe	84
PID 4992 wrote to memory of 2700	4992	123server.exe	84

C:\Users\Admin\AppData\Local\Temp\a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a90a788f257fcb6fb27f2add6c966340_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3224
- C:\Users\Admin\AppData\Local\Temp\123server.exe
  "C:\Users\Admin\AppData\Local\Temp\123server.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4992
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5032
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5032 -s 484
      4⤵
      Program crash
      PID:4860
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5032 -s 504
      4⤵
      Program crash
      PID:3864
- - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    3⤵
    PID:2700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 5032 -ip 5032
1⤵
PID:4920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 5032 -ip 5032
1⤵
PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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

C:\Users\Admin\AppData\Local\Temp\123server.exe

Filesize
68KB

MD5
f89062a56c67b7e7119bf5474b2e92a0

SHA1
37b35f01085470b3b134b73d85d9561af912e9e5

SHA256
373c5cdd917a95f83465a5c907696efbd21de9119109f7d6a052e58cce5aa1de

SHA512
aa0f2290573b08e9dd9d4dfc3128a6a3427866a4a16b794490bc1129b7aa3794976f12503617f4734e54946b8d8646f87f79255f18a7819fb19542d584546cb1

Download Submit
memory/3224-9-0x000000001C020000-0x000000001C0BC000-memory.dmp

Filesize
624KB

Download
memory/3224-4-0x000000001B0E0000-0x000000001B0EA000-memory.dmp

Filesize
40KB

Download
memory/3224-11-0x000000001B0D0000-0x000000001B0D8000-memory.dmp

Filesize
32KB

Download
memory/3224-7-0x000000001BD90000-0x000000001BDA0000-memory.dmp

Filesize
64KB

Download
memory/3224-12-0x000000001C2B0000-0x000000001C2FC000-memory.dmp

Filesize
304KB

Download
memory/3224-8-0x000000001BE80000-0x000000001BF26000-memory.dmp

Filesize
664KB

Download
memory/3224-10-0x00007FFBD2A40000-0x00007FFBD33E1000-memory.dmp

Filesize
9.6MB

Download
memory/3224-1-0x00007FFBD2A40000-0x00007FFBD33E1000-memory.dmp

Filesize
9.6MB

Download
memory/3224-3-0x00007FFBD2A40000-0x00007FFBD33E1000-memory.dmp

Filesize
9.6MB

Download
memory/3224-2-0x000000001B760000-0x000000001BC2E000-memory.dmp

Filesize
4.8MB

Download
memory/3224-0-0x00007FFBD2CF5000-0x00007FFBD2CF6000-memory.dmp

Filesize
4KB

Download
memory/3224-26-0x00007FFBD2A40000-0x00007FFBD33E1000-memory.dmp

Filesize
9.6MB

Download
memory/3224-25-0x00007FFBD2CF5000-0x00007FFBD2CF6000-memory.dmp

Filesize
4KB

Download
memory/4992-23-0x0000000010000000-0x000000001005D000-memory.dmp

Filesize
372KB

Download
memory/4992-20-0x0000000010000000-0x000000001005D000-memory.dmp

Filesize
372KB

Download
memory/5032-24-0x0000000010000000-0x000000001005D000-memory.dmp

Filesize
372KB

Download
memory/5032-22-0x0000000010000000-0x000000001005D000-memory.dmp

Filesize
372KB

Download

Analysis

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