donutloader | ba0a76532db536e62034c212536f3e60594cd2248fdedc9ba73b8a2380367f99

General

Target
所得税の確定申告に係る納税通知書4.zip
Size 120KB
Sample260915-hmt48ashld
SHA256 ba0a76532db536e62034c212536f3e60594cd2248fdedc9ba73b8a2380367f99
MD5 f17fa2fa131db632d8a87296f325c1be
SHA1 190c5e22bb6f6b6632268b9a0941573653b0152a
SHA512 d253bdc1b8acbadb0670145308b1700e34538912827f7390f8164a86a220f0aea28ee80590fb9188699d32c99d0481c1235fd66887da7c6c0a0b569067f2673b
SSDEEP 3072:xNGcXjAG20tkwxt5Y0TVmCSQMWuoDQZTktg586o9p:xNGVGmwYCVmZRkK5To9p
TLSH
T1CFC3124DEB476155CE0FB5208895ABFF0ECE2352CCE22139C58792E8AB94D535FF2522
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery donutloader overlord loader persistence rat

Malware Config

Signatures

Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
loader donutloader
Family: Overlord
Overlord is an open-source Windows RAT written in Golang.
rat overlord

Detects DonutLoader 1 IoCs

loader

resource	yara_rule
behavioral1/memory/4300-9-0x0000022A00C80000-0x0000022A013A3000-memory.dmp	family_donutloader

Detects Overlord RAT 2 IoCs

resource	yara_rule
behavioral1/memory/4300-11-0x0000022A05690000-0x0000022A08A07000-memory.dmp	family_overlord
behavioral1/memory/1356-16-0x000001A82BF40000-0x000001A82F2B7000-memory.dmp	family_overlord

Executes dropped EXE 1 IoCs

pid	Process
5328	ExplorerBroker.exe

Loads dropped DLL 1 IoCs

pid	Process
5328	ExplorerBroker.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate_bK5o = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Windows\\Explorer\\thumbcache_bK5okfZZ\\ExplorerBroker.exe"	所得税の確定申告に係る納税通知書4.exe

Looks up external IP address via web service 1 TTPs 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
1	api.ipify.org
12	api.ipify.org
18	api.ipify.org

Checks processor information in registry 2 TTPs 4 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	RuntimeBroker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RuntimeBroker.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RuntimeBroker.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RuntimeBroker.exe

Modifies Control Panel 1 IoCs

defense_evasion

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000\Control Panel\Accessibility\Blind Access\On = "1"	ExplorerBroker.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Deployment\Package\*\S-1-5-21-1404337215-1550464601-2805570857-1000\{9CCEC638-332A-46B6-9C15-7C740D2326B3}	RuntimeBroker.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Deployment\Package\*\S-1-5-21-1404337215-1550464601-2805570857-1000\{5E431CFB-1603-4DBA-8947-F4BDAE5F715B}	RuntimeBroker.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5136	所得税の確定申告に係る納税通知書4.exe
5136	所得税の確定申告に係る納税通知書4.exe
5136	所得税の確定申告に係る納税通知書4.exe
5136	所得税の確定申告に係る納税通知書4.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5136 wrote to memory of 4300	5136	所得税の確定申告に係る納税通知書4.exe	95
PID 5136 wrote to memory of 4300	5136	所得税の確定申告に係る納税通知書4.exe	95
PID 5328 wrote to memory of 1356	5328	ExplorerBroker.exe	98
PID 5328 wrote to memory of 1356	5328	ExplorerBroker.exe	98

C:\Windows\Explorer.exe
C:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\所得税の確定申告に係る納税通知書4.zip
1⤵
PID:5848

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3388

C:\Users\Admin\Desktop\所得税の確定申告に係る納税通知書4\所得税の確定申告に係る納税通知書4.exe
"C:\Users\Admin\Desktop\所得税の確定申告に係る納税通知書4\所得税の確定申告に係る納税通知書4.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5136
- C:\Windows\system32\RuntimeBroker.exe
  "C:\Windows\system32\RuntimeBroker.exe"
  2⤵
  - Checks processor information in registry
  - Modifies registry class
  PID:4300

C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bK5okfZZ\ExplorerBroker.exe
C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bK5okfZZ\ExplorerBroker.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Modifies Control Panel
- Suspicious use of WriteProcessMemory
PID:5328
- C:\Windows\system32\RuntimeBroker.exe
  "C:\Windows\system32\RuntimeBroker.exe"
  2⤵
  - Checks processor information in registry
  - Modifies registry class
  PID:1356

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:3340

C:\Windows\System32\SecurityHealthHost.exe
\\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
1⤵
PID:5124

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

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

ExplorerBroker.exe

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bK5okfZZ\ExplorerBroker.exe
Size 250KB
SHA256 abcb44b459e9f101106251bb9b4b7a07163554af450d0e61636417d12499cf2f
MD5 aeb22262cc2114f611c92eb062b34da3
SHA1 0bacc5bfbfeac8bade04d085e995d8c7f31c5f7c
SHA512 46fe4d42aacdc0ad9a3da270238ea982bed1af30478e5cdddce7fea8e04d49d0eb6db1c6275bc4eae5677c4b0bd371864eb1191ff6d4af9dbf507771469c9215
SSDEEP 6144:fK3jQoHr3VF2mjkaRGP4PkhijsKgW3UMKYMKBbZixsN:fKEoJF2mjkabsKgW3/m8
TLSH
T13044A11237F810D5F1B69679AAB58512E7B2BC662B25C7CF1260016E9F73BD0AC34732
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

event.dll

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bK5okfZZ\event.dll
Size 52KB
SHA256 61df4487225b6af0d2bcc6e4332603d82c72d9a058517b208eeb89533ff3f02d
MD5 f1a1e3a52a55d3dfc6d228f23c9806c5
SHA1 77ac9052284474288b1392532d66f33c5370a9c7
SHA512 bc2eb5834e0324e8368626e669378ead1161dbd46febdb4aaa0d006d6bc2aa957d7773e1ce57250f95264215251fb639a0e5a448ea0c4d38291cfcaaede83b2f
SSDEEP 1536:pK9PQ84hwc64bcecZEklVFhuAnzSbH+lP7x+:pK9PpYTFgecZEklfhugzKH+lPE
TLSH
T19D33F806668668EDD426C53542176B23E5B2B848A77079EF07F0CF257EA0ED1373C6C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

settings.dat

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\thumbcache_bK5okfZZ\settings.dat
Size 7.1MB
SHA256 d1ae5d193ea7530ee3718f5f4661228f739da8b250f478efd50d6c2a29a21580
MD5 1dc3a2159a5acce2f19addcab76bd7e4
SHA1 5d4de2272742d8aa90da105d2cfc173c9e4dc8c4
SHA512 a4fcfae1cc8f791885d6dbe9e8bbbfb5c08c5828356c8c9e9555142ea0aec51a2b26e2030c0ffbd6be7115f6f7a9df324214858cc41c31de323f333cba3f3109
SSDEEP 196608:oWjkFJSKr8iYN52W8Xvdxa7QovSGFTVNvSi4Im+vVViT:o5FJSKr7c4WKvdY7QmVVpSt8dY
TLSH
T10A76334E631D88B860DBC530D801D17B2C4CF63756BF8B1A80ADFE77D10A8B36566B5A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1356-16-0x000001A82BF40000-0x000001A82F2B7000-memory.dmp

Download

memory/4300-9-0x0000022A00C80000-0x0000022A013A3000-memory.dmp

Download

memory/4300-11-0x0000022A05690000-0x0000022A08A07000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads