cobaltstrike | 54094b2385ea86406ad20d865e6c03ec6233187e293d3d982d281d0237b552dc

General

Target

case_1978132122_1827517231.xlsm
Size

149KB
MD5

54ff757c84e46cb4ba814ecc370f2083
SHA1

d8357444374b2d6ad98cf3ee7535141d70f1dfc0
SHA256

54094b2385ea86406ad20d865e6c03ec6233187e293d3d982d281d0237b552dc
SHA512

061ba13876d1593f2e09e5ca188c8d6d688b7ba102d4a676c05b7e104f31df842c6c7396d4214f3e77f059b48c3fa3ad3f39335b4bfa42f16adaed59a6539f00

Score

10^/10

cobaltstrike backdoor trojan

Malware Config

Extracted

Family

cobaltstrike

Version

windows/download_exec

C2

http://onecoloradosport.com:443/jquery-3.3.2.slim.min.js

Extracted

Family

cobaltstrike

C2

http://onecoloradosport.com:443/jquery-3.3.1.min.js

Attributes

access_type
512
beacon_type
2048
create_remote_thread
0
day
0
dns_idle
0
dns_sleep
0
host
onecoloradosport.com,/jquery-3.3.1.min.js
http_header1
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
http_header2
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
http_method1
GET
http_method2
POST
injection_process
jitter
9472
maxdns
0
month
0
pipe_name
polling_time
45000
port_number
443
proxy_password
proxy_server
proxy_username
sc_process32
%windir%\syswow64\dllhost.exe
sc_process64
%windir%\sysnative\dllhost.exe
state_machine
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC9gn7lny5YpwUil+CfFRzm6hHqK3uDHsFRz7wvG1ygTdXRl4RgFZB+3LePb/5zZoiLXlTGx2rdCEcmzfERZSmJ9GGXs0t2R7eB4wtzry6fcKU9vYvo+5w51Y6a+slF+38WwkKzaYp892250s5ga7T/jJb36TGvHC6x5IIIwzveOwIDAQABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
unknown1
4.234810624e+09
unknown2
AAAABAAAAAEAAAXyAAAAAgAAAFQAAAACAAAPWwAAAA0AAAAPAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
unknown3
0
unknown4
0
unknown5
1.841236305e+09
uri
/jquery-3.3.2.min.js
user_agent
Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
year
0

Signatures

Cobaltstrike
Detected malicious payload which is part of Cobaltstrike.
trojan backdoor cobaltstrike

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	640	1212	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 5 IoCs

Processes:

rundll32.exe

flow pid process

16 640 rundll32.exe
17 640 rundll32.exe
33 640 rundll32.exe
35 640 rundll32.exe
36 640 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

640 rundll32.exe

flow	pid	process
16	640	rundll32.exe
17	640	rundll32.exe
33	640	rundll32.exe
35	640	rundll32.exe
36	640	rundll32.exe

pid	process
640	rundll32.exe

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

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1212 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description pid process target process

PID 1212 wrote to memory of 640 1212 EXCEL.EXE rundll32.exe
PID 1212 wrote to memory of 640 1212 EXCEL.EXE rundll32.exe

description	pid	process	target process
PID 1212 wrote to memory of 640	1212	EXCEL.EXE	rundll32.exe
PID 1212 wrote to memory of 640	1212	EXCEL.EXE	rundll32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\case_1978132122_1827517231.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1212

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Krock.KOD,StartW
2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:640

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\Krock.KOD
MD5
84040f339a996a373ae8a0bb0e671be5

SHA1
295fda9201323f640fd697faf69d2784e0135573

SHA256
1c8de01df040c973b37ae5ce8e1bb523e1ba24a9c25263706022f9a9894a2e50

SHA512
b537b562bf34d7dc2ecdfcce629fd08046832067aa19e740fd0340b257caf8abf5073d1d3de9de8430a31965fefe9d3d5b92a0b5d67fc910bd35413da1145ec2

Download Submit
\Users\Admin\Krock.KOD
MD5
84040f339a996a373ae8a0bb0e671be5

SHA1
295fda9201323f640fd697faf69d2784e0135573

SHA256
1c8de01df040c973b37ae5ce8e1bb523e1ba24a9c25263706022f9a9894a2e50

SHA512
b537b562bf34d7dc2ecdfcce629fd08046832067aa19e740fd0340b257caf8abf5073d1d3de9de8430a31965fefe9d3d5b92a0b5d67fc910bd35413da1145ec2

Download Submit
memory/640-7-0x0000000000000000-mapping.dmp

Download
memory/640-10-0x000001894C930000-0x000001894C931000-memory.dmp

Filesize
4KB

Download
memory/640-11-0x000001894E9F0000-0x000001894EDF0000-memory.dmp

Filesize
4.0MB

Download
memory/1212-2-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-3-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-4-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-5-0x00007FFC484B0000-0x00007FFC48AE7000-memory.dmp

Filesize
6.2MB

Download
memory/1212-6-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads