xtremerat | da0277751d8d440b235b95ed2c3403834299a54f88776933c2c19f9c7c6b8051

General

Target

bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe
Size

4.6MB
MD5

bc1eec3b5e375d606c62b50d7b3917d3
SHA1

9873a78eb7b9a5855347f4a858292b633364604b
SHA256

da0277751d8d440b235b95ed2c3403834299a54f88776933c2c19f9c7c6b8051
SHA512

76fe2bc45d6de7866778e80c09b63e2b12b3fd37e7a35274bd5fc46de66df7856ccb61dac911ad5c8c795dd4a979aaefa20d3fedb91ac15dceda80c32862b708
SSDEEP

98304:YOuJj/v+bBbbxhHzjp8e8+pkE2lNvh1ZzDj5:YOm+FbbvHzjF9pT2zZvzDj5

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Signatures

Detect XtremeRAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/4116-0-0x0000000010000000-0x00000000104CD000-memory.dmp	family_xtremerat
behavioral2/memory/5088-13-0x0000000010000000-0x00000000104CD000-memory.dmp	family_xtremerat
behavioral2/memory/4116-16-0x0000000010000000-0x00000000104CD000-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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
4528	778ihsan.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000023ca5-6.dat	upx
behavioral2/memory/4528-12-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral2/memory/4528-17-0x0000000000400000-0x0000000000434000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\778ihsan.exe.exe	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe
File created	C:\Windows\778ihsan.exe	bc1eec3b5e375d606c62b50d7b3917d3_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
3748	4116	WerFault.exe	83
4584	4116	WerFault.exe	83

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	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	778ihsan.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 4116	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	83
PID 5088 wrote to memory of 4116	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	83
PID 5088 wrote to memory of 4116	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	83
PID 5088 wrote to memory of 4116	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	83
PID 5088 wrote to memory of 848	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	84
PID 5088 wrote to memory of 848	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	84
PID 5088 wrote to memory of 848	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	84
PID 5088 wrote to memory of 4528	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	89
PID 5088 wrote to memory of 4528	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	89
PID 5088 wrote to memory of 4528	5088	bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe	89

C:\Users\Admin\AppData\Local\Temp\bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\bc1eec3b5e375d606c62b50d7b3917d3_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4116
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4116 -s 480
    3⤵
    - Program crash
    PID:3748
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4116 -s 488
    3⤵
    - Program crash
    PID:4584
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
  2⤵
  PID:848
- C:\Windows\778ihsan.exe
  "C:\Windows\778ihsan.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4116 -ip 4116
1⤵
PID:628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4116 -ip 4116
1⤵
PID:3480

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:\Windows\778ihsan.exe

Filesize
3.9MB

MD5
34252a7f751f9cb1fd9078d738180344

SHA1
72351b42cf556d1be767b8ae5af23c5062620ada

SHA256
b804894ee4cf6264ccae17a7eda9ec97fc0e6178341f73757eb4d43d7c4431e4

SHA512
08032020b3762d57f416181237677df459594e14bd84909f7f72c24ad60c5c5f0fcd8a0875f6eb69c8b5c6cff357567797086e69fb8acbefb57068d590f2ae26

Download Submit
memory/4116-0-0x0000000010000000-0x00000000104CD000-memory.dmp

Filesize
4.8MB

Download
memory/4116-16-0x0000000010000000-0x00000000104CD000-memory.dmp

Filesize
4.8MB

Download
memory/4528-12-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/4528-17-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/5088-13-0x0000000010000000-0x00000000104CD000-memory.dmp

Filesize
4.8MB

Download

Analysis

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