cobaltstrike | bc1462975dc1047acace72d40dc87b3baca7c2a3bf71d5f54ecaafb1bf924161

Resubmissions

28/01/2023, 20:13

230128-yzjr1shf2x 10

12/01/2023, 16:07

230112-tk5zgsgf39 10

Analysis

max time kernel
180s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
12/01/2023, 16:07

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General

Target

windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe
Size

42.2MB
MD5

e4b46649d3a062a562e5c8ce5729bdd7
SHA1

b56cfec6692828d2b240b0978e09fa22ddf23994
SHA256

bc1462975dc1047acace72d40dc87b3baca7c2a3bf71d5f54ecaafb1bf924161
SHA512

ffd062af7bab46dcee293f1fe20bff9d677f9593595e34a3e3cf5b2b79bef0283b775adea7fbddefdb020a73e68b7a143df871328231af0600fe0bc1bde6d68c
SSDEEP

786432:IMXrrRLIxJpnkivyTFHltPOTT2WFbK3xXTHqFnnOOFd:IgXIpkPHltPOTTNUxXuFnf

Score

10^/10

cobaltstrike xmrig backdoor discovery miner persistence spyware stealer trojan

Malware Config

Signatures

Cobaltstrike
Detected malicious payload which is part of Cobaltstrike.
trojan backdoor cobaltstrike
xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
miner xmrig

XMRig Miner payload 1 IoCs

miner

resource	yara_rule
behavioral2/memory/420-155-0x000001D12E6A0000-0x000001D12E6E0000-memory.dmp	xmrig

Executes dropped EXE 1 IoCs

pid	Process
420	MRT.exe

Registers COM server for autorun 1 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\CLSID\{73E709EA-5D93-4B2E-BBB0-99B7938DA9E4}\LocalServer32	MRT.exe

Loads dropped DLL 2 IoCs

pid	Process
420	MRT.exe
420	MRT.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\MRT.exe	windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe
File created	C:\Windows\system32\MRT.exe	windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\mrt.log	MRT.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\CLSID\{73E709EA-5D93-4B2E-BBB0-99B7938DA9E4}\LocalServer32	MRT.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
4420	windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe
4420	windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe
420	MRT.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	420	MRT.exe
Token: SeBackupPrivilege	420	MRT.exe
Token: SeRestorePrivilege	420	MRT.exe
Token: SeTcbPrivilege	420	MRT.exe
Token: SeTcbPrivilege	420	MRT.exe
Token: SeSystemEnvironmentPrivilege	420	MRT.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4420 wrote to memory of 420	4420	windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe	84
PID 4420 wrote to memory of 420	4420	windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe	84

C:\Users\Admin\AppData\Local\Temp\windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe
"C:\Users\Admin\AppData\Local\Temp\windows-kb890830-x64-v5.98_b56cfec6692828d2b240b0978e09fa22ddf23994.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Windows\system32\MRT.exe
  "C:\Windows\system32\MRT.exe"
  2⤵
  - Executes dropped EXE
  - Registers COM server for autorun
  - Loads dropped DLL
  - Drops file in Windows directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:420

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\System32\MRT.exe

Filesize
142.7MB

MD5
01bb6618647c7afc1742fe82c1072b30

SHA1
a04811aa6ffb5a317d240ea7b60fa5f0373b64e5

SHA256
a57cc270a953c7a04c7a5a8efa38166cbe0b8616378f8e807c41839add44fe19

SHA512
00203b6f8544595d07c8945e288b37538ca7ababf191d73a46c1b3d55b42c16f1795cb390ee48c5f80b0955d83cb6fd8c598d5445f3434964faad62d801f597e

Download Submit
C:\Windows\Temp\F322244C-E00D-6B49-FB39-1D209C8D8655\MPENGINE.DLL

Filesize
15.7MB

MD5
517246e597c5cb542cb3ad9c2f601201

SHA1
490da9f8c066ecccfa437b51badbc1bc85bd34e8

SHA256
e406d8809e6b3e7dd2a41131a2de92f36a4391f539657994c7a0f76385244be4

SHA512
a392f733bdebd241e613361223cdd7768fb5327d31e4e8fce2a822e5b4703d2a8ae6ba6932241cd41f077d4ad3a3cf23c92b69ae58bd3a40db9aacec592aac3f

Download Submit
C:\Windows\Temp\F322244C-E00D-6B49-FB39-1D209C8D8655\MPGEAR.DLL

Filesize
607KB

MD5
a0c4ac6378ce0313955dccfd2d9208a6

SHA1
7ee2f0f3bf4504f4f7bbc63cb5fa883711c13801

SHA256
abbe3285c58c830314f9f0ad2ddc769139c0d808e27893290adc69a535b996b1

SHA512
72ea9f0d7399fa5d6865f3f887ffa07098b883b1428b33dcb552a40bb22ca6a461a546736667ca1aa97e5f06dffd10dab765c7f6e3e827dd0335b562b27d2fb5

Download Submit
C:\Windows\system32\MRT.exe

Filesize
142.7MB

MD5
01bb6618647c7afc1742fe82c1072b30

SHA1
a04811aa6ffb5a317d240ea7b60fa5f0373b64e5

SHA256
a57cc270a953c7a04c7a5a8efa38166cbe0b8616378f8e807c41839add44fe19

SHA512
00203b6f8544595d07c8945e288b37538ca7ababf191d73a46c1b3d55b42c16f1795cb390ee48c5f80b0955d83cb6fd8c598d5445f3434964faad62d801f597e

Download Submit
memory/420-137-0x000001D12D920000-0x000001D12D924000-memory.dmp

Filesize
16KB

Download
memory/420-138-0x000001D12BCA0000-0x000001D12BCE0000-memory.dmp

Filesize
256KB

Download
memory/420-140-0x000001D12D990000-0x000001D12D9D0000-memory.dmp

Filesize
256KB

Download
memory/420-141-0x000001D12D9D0000-0x000001D12DA10000-memory.dmp

Filesize
256KB

Download
memory/420-144-0x000001D12DA90000-0x000001D12DAD0000-memory.dmp

Filesize
256KB

Download
memory/420-143-0x000001D12DA50000-0x000001D12DA90000-memory.dmp

Filesize
256KB

Download
memory/420-145-0x000001D12E2D0000-0x000001D12E310000-memory.dmp

Filesize
256KB

Download
memory/420-146-0x000001D12E310000-0x000001D12E350000-memory.dmp

Filesize
256KB

Download
memory/420-147-0x000001D12E350000-0x000001D12E390000-memory.dmp

Filesize
256KB

Download
memory/420-148-0x000001D12E390000-0x000001D12E3D0000-memory.dmp

Filesize
256KB

Download
memory/420-149-0x000001D12E500000-0x000001D12E540000-memory.dmp

Filesize
256KB

Download
memory/420-142-0x000001D12DA10000-0x000001D12DA50000-memory.dmp

Filesize
256KB

Download
memory/420-139-0x000001D12D940000-0x000001D12D980000-memory.dmp

Filesize
256KB

Download
memory/420-150-0x000001D12E540000-0x000001D12E580000-memory.dmp

Filesize
256KB

Download
memory/420-151-0x000001D12E580000-0x000001D12E5C0000-memory.dmp

Filesize
256KB

Download
memory/420-152-0x000001D12E5C0000-0x000001D12E600000-memory.dmp

Filesize
256KB

Download
memory/420-153-0x000001D12E610000-0x000001D12E650000-memory.dmp

Filesize
256KB

Download
memory/420-155-0x000001D12E6A0000-0x000001D12E6E0000-memory.dmp

Filesize
256KB

Download
memory/420-154-0x000001D12E660000-0x000001D12E6A0000-memory.dmp

Filesize
256KB

Download
memory/420-157-0x000001D12E730000-0x000001D12E770000-memory.dmp

Filesize
256KB

Download
memory/420-156-0x000001D12E6F0000-0x000001D12E730000-memory.dmp

Filesize
256KB

Download
memory/420-158-0x000001D12E770000-0x000001D12E7B0000-memory.dmp

Filesize
256KB

Download
memory/420-159-0x000001D12E7D0000-0x000001D12E810000-memory.dmp

Filesize
256KB

Download
memory/420-160-0x000001D12E3D0000-0x000001D12E410000-memory.dmp

Filesize
256KB

Download
memory/420-161-0x000001D12E410000-0x000001D12E450000-memory.dmp

Filesize
256KB

Download
memory/420-162-0x000001D12E450000-0x000001D12E490000-memory.dmp

Filesize
256KB

Download
memory/420-163-0x000001D12E490000-0x000001D12E4D0000-memory.dmp

Filesize
256KB

Download
memory/420-166-0x000001D12EA60000-0x000001D12EAA0000-memory.dmp

Filesize
256KB

Download
memory/420-165-0x000001D12EA20000-0x000001D12EA60000-memory.dmp

Filesize
256KB

Download
memory/420-167-0x000001D12EAA0000-0x000001D12EAE0000-memory.dmp

Filesize
256KB

Download
memory/420-168-0x000001D12EAE0000-0x000001D12EB20000-memory.dmp

Filesize
256KB

Download
memory/420-169-0x000001D12EB20000-0x000001D12EB60000-memory.dmp

Filesize
256KB

Download
memory/420-164-0x000001D12E9E0000-0x000001D12EA20000-memory.dmp

Filesize
256KB

Download
memory/420-170-0x000001D12EB60000-0x000001D12EBA0000-memory.dmp

Filesize
256KB

Download
memory/420-171-0x000001D12D570000-0x000001D12D669000-memory.dmp

Filesize
996KB

Download
memory/420-172-0x000001D130EE0000-0x000001D130FE0000-memory.dmp

Filesize
1024KB

Download
memory/420-173-0x000001D13A840000-0x000001D13A94D000-memory.dmp

Filesize
1.1MB

Download
memory/420-174-0x000001D138690000-0x000001D138890000-memory.dmp

Filesize
2.0MB

Download
memory/420-175-0x000001D130EE0000-0x000001D130FE0000-memory.dmp

Filesize
1024KB

Download
memory/420-176-0x000001D13A840000-0x000001D13A94D000-memory.dmp

Filesize
1.1MB

Download
memory/420-177-0x000001D138690000-0x000001D138890000-memory.dmp

Filesize
2.0MB

Download
memory/420-178-0x000001D12B130000-0x000001D12B150000-memory.dmp

Filesize
128KB

Download
memory/420-179-0x000001D12B130000-0x000001D12B150000-memory.dmp

Filesize
128KB

Download
memory/420-180-0x000001D12B140000-0x000001D12B160000-memory.dmp

Filesize
128KB

Download
memory/420-181-0x000001D12B160000-0x000001D12B180000-memory.dmp

Filesize
128KB

Download
memory/420-182-0x000001D12B290000-0x000001D12B2B0000-memory.dmp

Filesize
128KB

Download
memory/420-183-0x000001D12B160000-0x000001D12B180000-memory.dmp

Filesize
128KB

Download
memory/420-184-0x000001D13B0B0000-0x000001D13B1BD000-memory.dmp

Filesize
1.1MB

Download
memory/420-185-0x000001D13B0B0000-0x000001D13B1BD000-memory.dmp

Filesize
1.1MB

Download
memory/420-186-0x000001D12B290000-0x000001D12B2B0000-memory.dmp

Filesize
128KB

Download
memory/420-187-0x000001D12B2B0000-0x000001D12B2F0000-memory.dmp

Filesize
256KB

Download
memory/420-188-0x000001D13B0B0000-0x000001D13B1BD000-memory.dmp

Filesize
1.1MB

Download
memory/420-189-0x000001D13B0B0000-0x000001D13B1BD000-memory.dmp

Filesize
1.1MB

Download
memory/420-190-0x000001D12B290000-0x000001D12B2B0000-memory.dmp

Filesize
128KB

Download
memory/420-191-0x000001D12B2D0000-0x000001D12B2F0000-memory.dmp

Filesize
128KB

Download
memory/420-192-0x000001D12B2D0000-0x000001D12B2F0000-memory.dmp

Filesize
128KB

Download
memory/420-193-0x000001D12B2D0000-0x000001D12B2F0000-memory.dmp

Filesize
128KB

Download
memory/420-194-0x000001D1379D0000-0x000001D1379F0000-memory.dmp

Filesize
128KB

Download
memory/420-195-0x000001D12B290000-0x000001D12B2B0000-memory.dmp

Filesize
128KB

Download
memory/420-196-0x000001D1379D0000-0x000001D1379F0000-memory.dmp

Filesize
128KB

Download
memory/420-197-0x000001D1379D0000-0x000001D1379F0000-memory.dmp

Filesize
128KB

Download