asyncrat | f95c9eba1221dab4d457beb0844653a58aa846aa2de52a567ede3e279bb31d29

General

Target
2026-09-30_9e1f5808121297b2c0656e9efb5986f6_cobalt-strike_icedid_luca-stealer_njrat.exe
Size 243KB
Sample260930-k5cn1abd79
SHA256 f95c9eba1221dab4d457beb0844653a58aa846aa2de52a567ede3e279bb31d29
MD5 9e1f5808121297b2c0656e9efb5986f6
SHA1 565c7354d92ff820cb7309bb27279ea86eceefd7
SHA512 c775c9e077d432f652a96c4b764733ed96283488ba86c0061f539f7ed4b231d00cfb3ba08c2ab40404860ac499d878142457237022574759f0f3d81873c5a072
SSDEEP 3072:6mjgkBnG59lkYYPpKkIAJ4ap/qg64uda5bbCIIpZ+Q3CHLhYSwWP5QFT3:PUkBSXqn44FtbC/pElrhs3
TLSH
T19034BF16F7A618FBE57BC939C9414906DB723C624760EBCF03900A959F236E19E3EB11
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default discovery execution asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

XcryptRAT 0.5.7B

Botnet

Default

Mutex

HJjRcm3CEUEu

Attributes

delay
3
install
false
install_file
client.exe
install_folder
%AppData%
local_host
127.0.0.1

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000e00000001c514-15.dat	family_asyncrat

Detects file containing reversed ASEP Autorun registry keys 2 IoCs

resource	yara_rule
behavioral2/files/0x000e00000001c514-15.dat	INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse
behavioral2/memory/5572-18-0x0000000000E80000-0x0000000000E96000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse

Executes dropped EXE 1 IoCs

pid	Process
5572	000013C40E596836.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3272	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	000013C40E596836.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3272	cmd.exe
3748	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3748	PING.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5060 wrote to memory of 5572	5060	2026-09-30_9e1f5808121297b2c0656e9efb5986f6_cobalt-strike_icedid_luca-stealer_njrat.exe	88
PID 5060 wrote to memory of 3272	5060	2026-09-30_9e1f5808121297b2c0656e9efb5986f6_cobalt-strike_icedid_luca-stealer_njrat.exe	89
PID 3272 wrote to memory of 3748	3272	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-09-30_9e1f5808121297b2c0656e9efb5986f6_cobalt-strike_icedid_luca-stealer_njrat.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-30_9e1f5808121297b2c0656e9efb5986f6_cobalt-strike_icedid_luca-stealer_njrat.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5060
- C:\Users\Admin\AppData\Local\Temp\000013C40E596836.exe
  "C:\Users\Admin\AppData\Local\Temp\\000013C40E596836.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5572
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c ping -n 3 127.0.0.1 > nul & del /f /q "C:\Users\Admin\AppData\Local\Temp\\000013C40E596836.exe"
  2⤵
  - Executes a command shell one-liner
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3272
- - C:\Windows\system32\PING.EXE
    ping -n 3 127.0.0.1
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3748

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

000013C40E596836.exe

Path C:\Users\Admin\AppData\Local\Temp\000013C40E596836.exe
Size 61KB
SHA256 196495eddfe909494cda311db101a14ef19dc2b844759042e31c7cf6a2397ee1
MD5 7af481224bfaadc6504dd530cfd1c12c
SHA1 62c8d0852f74ba6a7ab0a9b31f3f91fec6573d8e
SHA512 ae84ecb2605918cc91cc5170771657709f8951acca568c80aa72535686e7719691fa637b9503f899043dba8ca7e9b9e157d3595b810867c738f9073d7bf92f10
SSDEEP 1536:nud+X1fgmeRIagZratVaH8b8cU3dAMAf4m3NGqof+:nud+X1fgmogZratVaH8b8FdAz4m3NMm
TLSH
T143533C047BF98129F2BE8F789CF131444AB6F6576542D64E1DC810DA0A23BC69A426FF
MD5 SHA1 SHA512 SSDEEP TLSH

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stub_debug.txt

Path C:\Users\Public\stub_debug.txt
Size 274B
SHA256 020fa4c72ddb5852e3f6e4d228c5ebc6edada3e504f1a8573688502abcdb1d16
MD5 4665b0b7469a76f1854b92340840a52b
SHA1 a1c3162fd69dc65f9503048dc6013493b734add8
SHA512 36b2189d7a3fa960440a5a9caae37dbf3c4f98b1caa42c31bc4e6bc17bccbc4247d264c6b70da11a8d7b29c08239957c4436844acfa6e3cd8becb1abbaf7c731
TLSH
T110D0E253AF808730A8104111C04374E5BE651CC5B61C567C77949D27989AEACA7E300C
MD5 SHA1 SHA512 TLSH

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memory/5572-17-0x0000000075082000-0x0000000075083000-memory.dmp

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memory/5572-18-0x0000000000E80000-0x0000000000E96000-memory.dmp

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memory/5572-19-0x0000000075070000-0x000000007582C000-memory.dmp

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memory/5572-20-0x0000000075082000-0x0000000075083000-memory.dmp

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memory/5572-21-0x0000000075070000-0x000000007582C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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