xtremerat | a7626bffd9e9cb6c9e8be8081dee3ef9ed4178de7335a9285d748594ea2b306a

General

Target

e75adde386505df699c22e87cc73e105_JaffaCakes118.exe
Size

52KB
MD5

e75adde386505df699c22e87cc73e105
SHA1

4bcc42b49f3796acd5e3ba1e848c115adda2f9c3
SHA256

a7626bffd9e9cb6c9e8be8081dee3ef9ed4178de7335a9285d748594ea2b306a
SHA512

3118d25d4670c30d671e09a73b422539b50e7022f9f9044c343fff4a2dc66446871bfbcd35144d61eca7ead21dd2142a559664da69dd34578843ef3f3c03c32e
SSDEEP

768:/JMuijtHf5g7/IIG3bGcYDBSvFIWuePQDGEsgQhiQAqrElEdETkTWOf20:/CNW71rcYDAWeoDrsxiQxeL0

Score

10^/10

xtremerat defense_evasion discovery persistence rat spyware upx

Malware Config

Extracted

Family

xtremerat

C2

ㆼjoker01.zapto.org

Signatures

Detect XtremeRAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/3552-41-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/5020-42-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/3552-43-0x0000000010000000-0x000000001004D000-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
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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
5020	server (4).exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b8e-7.dat	upx
behavioral2/memory/5020-39-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/3552-41-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/5020-42-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/3552-43-0x0000000010000000-0x000000001004D000-memory.dmp	upx

Subvert Trust Controls: Mark-of-the-Web Bypass 1 TTPs 1 IoCs

When files are downloaded from the Internet, they are tagged with a hidden NTFS Alternate Data Stream (ADS) named Zone.Identifier with a specific value known as the MOTW.

defense_evasion

SIP and Trust Provider Hijacking

T1553.003

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\server (4).exe:Zone.Identifier	e75adde386505df699c22e87cc73e105_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
4484	3552	WerFault.exe	84
4676	3552	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	server (4).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe
Key created	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\server (4).exe:Zone.Identifier	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1716	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 5020	1716	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe	82
PID 1716 wrote to memory of 5020	1716	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe	82
PID 1716 wrote to memory of 5020	1716	e75adde386505df699c22e87cc73e105_JaffaCakes118.exe	82
PID 5020 wrote to memory of 3552	5020	server (4).exe	84
PID 5020 wrote to memory of 3552	5020	server (4).exe	84
PID 5020 wrote to memory of 3552	5020	server (4).exe	84
PID 5020 wrote to memory of 3552	5020	server (4).exe	84
PID 5020 wrote to memory of 2028	5020	server (4).exe	85
PID 5020 wrote to memory of 2028	5020	server (4).exe	85
PID 5020 wrote to memory of 2028	5020	server (4).exe	85

C:\Users\Admin\AppData\Local\Temp\e75adde386505df699c22e87cc73e105_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e75adde386505df699c22e87cc73e105_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Subvert Trust Controls: Mark-of-the-Web Bypass
- System Location Discovery: System Language Discovery
- Modifies registry class
- NTFS ADS
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Users\Admin\AppData\Local\Temp\server (4).exe
  "C:\Users\Admin\AppData\Local\Temp\server (4).exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5020
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3552
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3552 -s 512
      4⤵
      Program crash
      PID:4484
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3552 -s 520
      4⤵
      Program crash
      PID:4676
- - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    3⤵
    PID:2028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3552 -ip 3552
1⤵
PID:2420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3552 -ip 3552
1⤵
PID:4996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Subvert Trust Controls

1

T1553

SIP and Trust Provider Hijacking

1

T1553.003

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\server (4).exe

Filesize
33KB

MD5
5bd3c8170a95f0bfceecdbe49951619f

SHA1
e6cc2962d51088d1a4562df82bf3e2a51d05cdbd

SHA256
88fd589a55221b85a2c6daf3e1eadf9d080bd427faaa5ae7a9cf00bb33343d39

SHA512
5b70b22a29d4d2396c88394c315cde8ea517ac5fb34eb58d79d138d1812dc0cb8e4931b7fb5ecc2dabe7273c60de185daa06ceb84a8c3b4c939ba32f3a0bb808

Download Submit
memory/3552-41-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/3552-43-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/5020-39-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/5020-42-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download

Analysis

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