xtremerat | 0e3d1e8feed80ebdf7f88c897914d45d9ac6aa02924dd5281f1dd4fdcbc18f8c

General

Target

fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe
Size

64KB
MD5

fdd35659b7ca2e9e62adaba2f4b222ed
SHA1

91c0ee04caf1d74d4aaf6f65752376b39ac060dd
SHA256

0e3d1e8feed80ebdf7f88c897914d45d9ac6aa02924dd5281f1dd4fdcbc18f8c
SHA512

e973181fc7c4ffdcb0d06d556796e73dd6c6c61e82cb190a9a6d385cc7c948b941e127e452d2ed64baf465e356f344248488a7e0d8fd5eda02f4013dcf9ec8a4
SSDEEP

1536:PLCQ0OqJkdhcjHFv9FlF9BFfYRKYqgnqZy:PLCx4cjHL/F9BRqKY5nX

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Signatures

Detect XtremeRAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/1740-18-0x0000000000C80000-0x0000000000C95000-memory.dmp	family_xtremerat
behavioral2/memory/4732-19-0x0000000000C80000-0x0000000000C95000-memory.dmp	family_xtremerat
behavioral2/memory/1740-20-0x0000000000C80000-0x0000000000C95000-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

Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{8VCYR8D3-LV67-6V74-A610-EY11L1JV50U4}	tmpB7D6.tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{8VCYR8D3-LV67-6V74-A610-EY11L1JV50U4}\StubPath = "C:\\Windows\\system32\\Ins\\Server.exe restart"	tmpB7D6.tmp.exe

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
4732	tmpB7D6.tmp.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\R!l&lT = "C:\\Windows\\system32\\Ins\\Server.exe"	tmpB7D6.tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\x1PzhJ = "C:\\Windows\\system32\\Ins\\Server.exe"	tmpB7D6.tmp.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Ins\Server.exe	tmpB7D6.tmp.exe
File created	C:\Windows\SysWOW64\Ins\Server.exe	tmpB7D6.tmp.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0008000000023c9d-8.dat	upx
behavioral2/memory/4732-12-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx
behavioral2/memory/1740-18-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx
behavioral2/memory/4732-19-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx
behavioral2/memory/1740-20-0x0000000000C80000-0x0000000000C95000-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
4140	1740	WerFault.exe	84
2004	1740	WerFault.exe	84

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	tmpB7D6.tmp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	calc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 4732	2432	fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe	83
PID 2432 wrote to memory of 4732	2432	fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe	83
PID 2432 wrote to memory of 4732	2432	fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe	83
PID 4732 wrote to memory of 1740	4732	tmpB7D6.tmp.exe	84
PID 4732 wrote to memory of 1740	4732	tmpB7D6.tmp.exe	84
PID 4732 wrote to memory of 1740	4732	tmpB7D6.tmp.exe	84
PID 4732 wrote to memory of 1740	4732	tmpB7D6.tmp.exe	84

C:\Users\Admin\AppData\Local\Temp\fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fdd35659b7ca2e9e62adaba2f4b222ed_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Local\Temp\tmpB7D6.tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmpB7D6.tmp.exe"
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4732
- - C:\Windows\SysWOW64\calc.exe
    calc.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1740
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1740 -s 448
      4⤵
      Program crash
      PID:4140
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1740 -s 456
      4⤵
      Program crash
      PID:2004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1740 -ip 1740
1⤵
PID:4068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1740 -ip 1740
1⤵
PID:2904

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB7D6.tmp.exe

Filesize
19KB

MD5
4f6362cb66340fa8811015c1cc61d2b4

SHA1
7e6944ad6d84d45e564631715ab6fdcaf152476c

SHA256
6096d925c879b395d605bdcd94cfd015ae81748be7ff24a02da79b653989f20a

SHA512
19676b559394a80dd9193ea03be9e68a4a229d182bdcfdc8521f1eda5fd2b235a3cd5f93d80447c87d767c31c5bcb94ea542001b63c45c124e49489dd1c28240

Download Submit
memory/1740-18-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/1740-20-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/2432-0-0x00007FFEEE495000-0x00007FFEEE496000-memory.dmp

Filesize
4KB

Download
memory/2432-1-0x00007FFEEE1E0000-0x00007FFEEEB81000-memory.dmp

Filesize
9.6MB

Download
memory/2432-2-0x000000001B0A0000-0x000000001B146000-memory.dmp

Filesize
664KB

Download
memory/2432-4-0x00007FFEEE1E0000-0x00007FFEEEB81000-memory.dmp

Filesize
9.6MB

Download
memory/2432-14-0x00007FFEEE1E0000-0x00007FFEEEB81000-memory.dmp

Filesize
9.6MB

Download
memory/4732-12-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/4732-19-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads