xtremerat | d3e050241bc051ef74ac9f29b00a6940e86b7d9a4e379f053af78c7158c7833d

General

Target

546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
Size

90KB
MD5

546dae0132f9dac504e612c9dc3c4163
SHA1

92068400766e11dac72a5376421db7509282baa1
SHA256

d3e050241bc051ef74ac9f29b00a6940e86b7d9a4e379f053af78c7158c7833d
SHA512

53e2290b2b296b8e3849863e814a38a2947c05a7ec954dedb3c0e2f83a1db309a49e766f57f9516fbc77fb1b8f4a18721f76602878ccd16eb0f28a9bb775aa27
SSDEEP

1536:4l/UOz1dnuEIkYhq6ka8sCDcSm76lXwlppxEBSs1yCdMrPkz55bfU:G/v7xIj0jsCpb9qjEs3QMrPu5rU

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Extracted

Family

xtremerat

C2

fofo05333.no-ip.org

Signatures

Detect XtremeRAT payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4372-22-0x0000000010000000-0x000000001004B000-memory.dmp	family_xtremerat
behavioral2/memory/5068-24-0x0000000010000000-0x000000001004B000-memory.dmp	family_xtremerat
behavioral2/memory/4372-25-0x0000000010000000-0x000000001004B000-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

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

Processes:

546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

Processes:

server.exe

pid process

5068 server.exe

pid	process
5068	server.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe

description	ioc	process
File created	C:\Windows\assembly\Desktop.ini	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\server.exe	upx
behavioral2/memory/5068-20-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/4372-22-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/5068-24-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/4372-25-0x0000000010000000-0x000000001004B000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

Processes:

546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe

description	ioc	process
File opened for modification	C:\Windows\assembly\Desktop.ini	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
File created	C:\Windows\assembly\Desktop.ini	546dae0132f9dac504e612c9dc3c4163_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

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

4056 4372 WerFault.exe svchost.exe
1692 4372 WerFault.exe svchost.exe

pid	pid_target	process	target process
4056	4372	WerFault.exe	svchost.exe
1692	4372	WerFault.exe	svchost.exe

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

Processes:

server.exesvchost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe

description	pid	process
Token: SeDebugPrivilege	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
Token: 33	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
Token: 33	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exeserver.exe

description	pid	process	target process
PID 448 wrote to memory of 5068	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe	server.exe
PID 448 wrote to memory of 5068	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe	server.exe
PID 448 wrote to memory of 5068	448	546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe	server.exe
PID 5068 wrote to memory of 4372	5068	server.exe	svchost.exe
PID 5068 wrote to memory of 4372	5068	server.exe	svchost.exe
PID 5068 wrote to memory of 4372	5068	server.exe	svchost.exe
PID 5068 wrote to memory of 4372	5068	server.exe	svchost.exe
PID 5068 wrote to memory of 3000	5068	server.exe	msedge.exe
PID 5068 wrote to memory of 3000	5068	server.exe	msedge.exe
PID 5068 wrote to memory of 3000	5068	server.exe	msedge.exe

C:\Users\Admin\AppData\Local\Temp\546dae0132f9dac504e612c9dc3c4163_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\546dae0132f9dac504e612c9dc3c4163_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:448
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5068
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4372
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4372 -s 484
      4⤵
      Program crash
      PID:4056
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4372 -s 492
      4⤵
      Program crash
      PID:1692
- - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    3⤵
    PID:3000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 200 -p 4372 -ip 4372
1⤵
PID:5104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4372 -ip 4372
1⤵
PID:2120

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

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Downloads

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

Filesize
31KB

MD5
17a25ac941c0c8120792bb261e9610de

SHA1
23edcf940b585ee7d8ff4d6ee3ab7e264f1a2ae2

SHA256
2aca490f5938f1db06e8e571f429b34bd61d39c3c0a62275ef8773f5ceba4c05

SHA512
23d94f02f206525eee55a9884a95b27eefcee1f139333adbf5cec55fbb64da8eecf3acd703859ee76413dfd28a95f18bc580cfd04cac4834b336625b916ca153

Download Submit
memory/448-10-0x00007FFD77EB0000-0x00007FFD78851000-memory.dmp

Filesize
9.6MB

Download
memory/448-7-0x000000001B900000-0x000000001B910000-memory.dmp

Filesize
64KB

Download
memory/448-11-0x0000000001230000-0x0000000001238000-memory.dmp

Filesize
32KB

Download
memory/448-4-0x0000000001360000-0x000000000136A000-memory.dmp

Filesize
40KB

Download
memory/448-12-0x000000001C900000-0x000000001C94C000-memory.dmp

Filesize
304KB

Download
memory/448-8-0x000000001C4F0000-0x000000001C596000-memory.dmp

Filesize
664KB

Download
memory/448-9-0x000000001C670000-0x000000001C70C000-memory.dmp

Filesize
624KB

Download
memory/448-2-0x000000001BDF0000-0x000000001C2BE000-memory.dmp

Filesize
4.8MB

Download
memory/448-3-0x00007FFD77EB0000-0x00007FFD78851000-memory.dmp

Filesize
9.6MB

Download
memory/448-1-0x00007FFD77EB0000-0x00007FFD78851000-memory.dmp

Filesize
9.6MB

Download
memory/448-0-0x00007FFD78165000-0x00007FFD78166000-memory.dmp

Filesize
4KB

Download
memory/448-27-0x00007FFD77EB0000-0x00007FFD78851000-memory.dmp

Filesize
9.6MB

Download
memory/448-26-0x00007FFD78165000-0x00007FFD78166000-memory.dmp

Filesize
4KB

Download
memory/4372-25-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/4372-22-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/5068-24-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download
memory/5068-20-0x0000000010000000-0x000000001004B000-memory.dmp

Filesize
300KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads