xtremerat | 2b6fa41a3067241fda1be99c77e4712eddd8b1f6f0e5fc326f9333431c86a434

General

Target
306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe
Size 272KB
Sample240709-p1pj8avcmp
SHA256 2b6fa41a3067241fda1be99c77e4712eddd8b1f6f0e5fc326f9333431c86a434
MD5 306f694159d8b3b3917769c6026756bf
SHA1 c64b421af8337839aaa9bba8d466d81e80289463
SHA512 6d30fc4d93df55ff2c41a910585c0a6e5e091a09c439804db5615e9206c743726fec871b569877a4f55bb4ee35fe951ece58c0bd7e374fadfa8e2094384f798b
SSDEEP 6144:V9gwx5d/WMXKhOO75uym8HQuUdKd1FShv+C+e+GNLBRoA:V9gwMMdIuF8H5UdKTFev7+0N1R9
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xtremerat persistence rat spyware upx

Malware Config

Extracted

Family

xtremerat

C2

voice88.zapto.org

Signatures

Detect XtremeRAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/2000-21-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/1736-23-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/2000-24-0x0000000010000000-0x000000001004D000-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

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-1-5-21-3310979990-555183016-1244931625-1000\Control Panel\International\Geo\Nation	306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
1736	server.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000023384-8.dat	upx
behavioral2/memory/1736-12-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/2000-21-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/1736-23-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/2000-24-0x0000000010000000-0x000000001004D000-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
3568	2000	WerFault.exe	88
2728	2000	WerFault.exe	88

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	2288	dw20.exe
Token: SeBackupPrivilege	2288	dw20.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4164 wrote to memory of 1736	4164	306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe	85
PID 4164 wrote to memory of 1736	4164	306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe	85
PID 4164 wrote to memory of 1736	4164	306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe	85
PID 4164 wrote to memory of 2288	4164	306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe	86
PID 4164 wrote to memory of 2288	4164	306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe	86
PID 1736 wrote to memory of 2000	1736	server.exe	88
PID 1736 wrote to memory of 2000	1736	server.exe	88
PID 1736 wrote to memory of 2000	1736	server.exe	88
PID 1736 wrote to memory of 2000	1736	server.exe	88
PID 1736 wrote to memory of 5092	1736	server.exe	89
PID 1736 wrote to memory of 5092	1736	server.exe	89
PID 1736 wrote to memory of 5092	1736	server.exe	89

C:\Users\Admin\AppData\Local\Temp\306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\306f694159d8b3b3917769c6026756bf_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1736
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    PID:2000
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 480
      4⤵
      Program crash
      PID:3568
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 488
      4⤵
      Program crash
      PID:2728
- - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
    3⤵
    PID:5092
- C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
  dw20.exe -x -s 1028
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:2288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2000 -ip 2000
1⤵
PID:4968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2000 -ip 2000
1⤵
PID:824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

server.exe

Path C:\Users\Admin\AppData\Local\Temp\server.exe
Size 33KB
SHA256 221781850cb9dc3d1f8a5cbcf7f553c00ee306129218585555fcf5b198d06de8
MD5 5df277f11b17a87a29eed82075d42404
SHA1 e9260fc1036c551688711138081d66e430d57a46
SHA512 c226dbcfd8ad7b3f3d659c1e06f78fcdf1a4d399b4e29d5ab33a656d81387dc7d4e43f8d350e2defe56806e975cb8e5167080f84f3e63989e5fecf7e62c3c983
SSDEEP 768:wMuijtHf5g7/IIG3bGcYDBSvFIWuePQtv66ly4WvVDyJ1:5NW71rcYDAWeotvXlXsdQ
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1736-12-0x0000000010000000-0x000000001004D000-memory.dmp

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memory/1736-23-0x0000000010000000-0x000000001004D000-memory.dmp

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memory/2000-21-0x0000000010000000-0x000000001004D000-memory.dmp

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memory/2000-24-0x0000000010000000-0x000000001004D000-memory.dmp

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memory/4164-0-0x00007FFD9F145000-0x00007FFD9F146000-memory.dmp

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memory/4164-1-0x000000001B140000-0x000000001B1E6000-memory.dmp

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memory/4164-2-0x00007FFD9EE90000-0x00007FFD9F831000-memory.dmp

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memory/4164-4-0x00007FFD9EE90000-0x00007FFD9F831000-memory.dmp

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memory/4164-20-0x00007FFD9EE90000-0x00007FFD9F831000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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