asyncrat | aead3b29e4eb3a2c5499b67eb81a609bd85944a1d7ec6b9557be527a0c566929

General

Target

JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe
Size

156KB
MD5

dbf61f566a642cdd0df3fc1d078debb8
SHA1

0294ef20386693a5699bc4e57653f966f0eaf028
SHA256

aead3b29e4eb3a2c5499b67eb81a609bd85944a1d7ec6b9557be527a0c566929
SHA512

4de09065e244d791d8c909a1c6cd689063f8318af2648498f9cf435be19b666aba096f1b2946a75200cacee5a63d705fb545c42a9d6f7a5dbf49d3cd0865467c
SSDEEP

3072:bqOQcs8pmp5W4J44tDlsAU/UwtRUsUUc2fjRs+DVs+A1+HX5wsOZ4T3EMXckbNGV:bqLl2V7H6sA4bEMXc4VLvTGc

Score

10^/10

asyncrat default discovery rat rezer0

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

winx.xcapdatap.capetown:6204

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral2/memory/640-10-0x0000000006250000-0x0000000006268000-memory.dmp	rezer0

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 640 set thread context of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4508	schtasks.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 640 wrote to memory of 4508	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	102
PID 640 wrote to memory of 4508	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	102
PID 640 wrote to memory of 4508	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	102
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104
PID 640 wrote to memory of 4016	640	JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe	104

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:640
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PqVwJtjSm" /XML "C:\Users\Admin\AppData\Local\Temp\tmp84AC.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4508
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe
  "{path}"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4016

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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\Microsoft\CLR_v4.0_32\UsageLogs\JaffaCakes118_dbf61f566a642cdd0df3fc1d078debb8.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp84AC.tmp

Filesize
1KB

MD5
92a42485214897a72d2e635a89c72fa1

SHA1
274ad2b2c6583b2457448647632fecb8481e1f02

SHA256
5c6f8be29b0cd44121235d9218c0c333689eed7c9a1c6d208f77e9910ce46419

SHA512
fc77e68b86acda6e6f38b6d2bd481d505c3899a68ecfab3b91e9aaa606e414dec3948f24fb769b75f31c54d369945424ecb8428c76b6e386fbd3544aff7f9dc2

Download Submit
memory/640-8-0x00000000743FE000-0x00000000743FF000-memory.dmp

Filesize
4KB

Download
memory/640-2-0x0000000005AA0000-0x0000000006044000-memory.dmp

Filesize
5.6MB

Download
memory/640-4-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/640-5-0x0000000005550000-0x000000000555A000-memory.dmp

Filesize
40KB

Download
memory/640-6-0x00000000057F0000-0x000000000588C000-memory.dmp

Filesize
624KB

Download
memory/640-7-0x0000000005540000-0x0000000005548000-memory.dmp

Filesize
32KB

Download
memory/640-0-0x00000000743FE000-0x00000000743FF000-memory.dmp

Filesize
4KB

Download
memory/640-9-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/640-10-0x0000000006250000-0x0000000006268000-memory.dmp

Filesize
96KB

Download
memory/640-3-0x0000000005590000-0x0000000005622000-memory.dmp

Filesize
584KB

Download
memory/640-17-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/640-1-0x0000000000B60000-0x0000000000B8C000-memory.dmp

Filesize
176KB

Download
memory/4016-14-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4016-18-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/4016-19-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/4016-20-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download
memory/4016-21-0x00000000743F0000-0x0000000074BA0000-memory.dmp

Filesize
7.7MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads