zloader | eecf912bfb121a06499dd43e8f62381d18a8b9efdc9e57aa2ae3d355cb28794e

Resubmissions

03-11-2021 17:08

211103-vnrrpsecf5 10

28-10-2021 11:34

211028-nphf4agcan 10

Analysis

max time kernel
188s
max time network
188s
platform
windows10_x64
resource
win10-en-20211014
submitted
03-11-2021 17:08

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General

Target

SophosAmsiProvider.dll
Size

432KB
MD5

2b3251fe929788b34fd4af2b12c0ca09
SHA1

c58283831eb0d495b42236ff1ee59b05d6101873
SHA256

eecf912bfb121a06499dd43e8f62381d18a8b9efdc9e57aa2ae3d355cb28794e
SHA512

dd202ac9207c9e481911f29892c7fab12dc394349c51b318ab436d93c57f3217b3f52ba5bbc5fe0722bb5375fdd379810baaee334cc21cd34e7c09f357bfc386

Score

10^/10

zloader vasja vasja botnet persistence trojan

Malware Config

Extracted

Family

zloader

Botnet

vasja

Campaign

vasja

https://iqowijsdakm.com/gate.php

https://wiewjdmkfjn.com/gate.php

https://dksaoidiakjd.com/gate.php

https://iweuiqjdakjd.com/gate.php

https://yuidskadjna.com/gate.php

https://olksmadnbdj.com/gate.php

https://odsakmdfnbs.com/gate.php

https://odsakjmdnhsaj.com/gate.php

https://odjdnhsaj.com/gate.php

https://odoishsaj.com/gate.php

Attributes

build_id
157

rc4.plain

rsa_pubkey.plain

Signatures

Zloader, Terdot, DELoader, ZeusSphinx
Zloader is a malware strain that was initially discovered back in August 2015.
trojan botnet zloader
Blocklisted process makes network request 6 IoCs

Processes:

msiexec.exe

flow pid process

34 2656 msiexec.exe
36 2656 msiexec.exe
38 2656 msiexec.exe
43 2656 msiexec.exe
45 2656 msiexec.exe
47 2656 msiexec.exe

flow	pid	process
34	2656	msiexec.exe
36	2656	msiexec.exe
38	2656	msiexec.exe
43	2656	msiexec.exe
45	2656	msiexec.exe
47	2656	msiexec.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run\Kosyqiw = "regsvr32.exe /s C:\\Users\\Admin\\AppData\\Roaming\\Ohky\\haokig.dll"	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

regsvr32.exe

description pid process target process

PID 2724 set thread context of 2656 2724 regsvr32.exe msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 2656 msiexec.exe
Token: SeSecurityPrivilege 2656 msiexec.exe

description	pid	process	target process
PID 2724 set thread context of 2656	2724	regsvr32.exe	msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	2656	msiexec.exe
Token: SeSecurityPrivilege	2656	msiexec.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

regsvr32.exeregsvr32.exe

description	pid	process	target process
PID 2704 wrote to memory of 2724	2704	regsvr32.exe	regsvr32.exe
PID 2704 wrote to memory of 2724	2704	regsvr32.exe	regsvr32.exe
PID 2704 wrote to memory of 2724	2704	regsvr32.exe	regsvr32.exe
PID 2724 wrote to memory of 2656	2724	regsvr32.exe	msiexec.exe
PID 2724 wrote to memory of 2656	2724	regsvr32.exe	msiexec.exe
PID 2724 wrote to memory of 2656	2724	regsvr32.exe	msiexec.exe
PID 2724 wrote to memory of 2656	2724	regsvr32.exe	msiexec.exe
PID 2724 wrote to memory of 2656	2724	regsvr32.exe	msiexec.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\SophosAmsiProvider.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2704

C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\SophosAmsiProvider.dll
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2724

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:2656

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/2656-118-0x0000000000D50000-0x0000000000D76000-memory.dmp

Filesize
152KB

Download
memory/2656-119-0x0000000000000000-mapping.dmp

Download
memory/2656-120-0x0000000000C60000-0x0000000000C61000-memory.dmp

Filesize
4KB

Download
memory/2656-121-0x0000000000C60000-0x0000000000C61000-memory.dmp

Filesize
4KB

Download
memory/2656-122-0x0000000000D50000-0x0000000000D76000-memory.dmp

Filesize
152KB

Download
memory/2724-115-0x0000000000000000-mapping.dmp

Download
memory/2724-116-0x0000000002FD0000-0x0000000002FD1000-memory.dmp

Filesize
4KB

Download
memory/2724-117-0x0000000010000000-0x0000000010081000-memory.dmp

Filesize
516KB

Download