guloader | 0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37

General

Target

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe
Size

1.3MB
MD5

c57990d44e934775deb9fec1dfe4985f
SHA1

94353ec497c61edf40af619df3597e2c4cd25add
SHA256

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37
SHA512

6d32f9803c62b901667025b98a16bbb4e7d5cf29f03f396ca335905a5d55c607f51bc5dd68cbc316ce9cdbee5060d6024ca0d15bc741560a140dd8cd4b533c93
SSDEEP

24576:qut3xb/w8FHrbRhK2537ZQ9JR3uYfYsl3yNStYKc1pMZpDoGhi8+fAO/s8Cnv:rFLO237ZW4YfYslistYHrMNiN5s3v

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.execaspol.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe

Loads dropped DLL 1 IoCs

Processes:

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe

pid process

1096 0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe
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
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.execaspol.exe

pid process

1096 0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe
1796 caspol.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe

description	pid	process	target process
PID 1096 set thread context of 1796	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe

pid	process
1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe
1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe

description	pid	process	target process
PID 1096 wrote to memory of 1112	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1112	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1112	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1112	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1796	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1796	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1796	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1796	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe
PID 1096 wrote to memory of 1796	1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe	caspol.exe

C:\Users\Admin\AppData\Local\Temp\0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe
"C:\Users\Admin\AppData\Local\Temp\0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1096

C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe
"C:\Users\Admin\AppData\Local\Temp\0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe"
2⤵
PID:1112

C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe
"C:\Users\Admin\AppData\Local\Temp\0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe"
2⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:1796

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

\Users\Admin\AppData\Local\Temp\nsy3B10.tmp\System.dll
Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/1096-70-0x0000000003870000-0x0000000003971000-memory.dmp

Filesize
1.0MB

Download
memory/1096-56-0x0000000003870000-0x0000000003971000-memory.dmp

Filesize
1.0MB

Download
memory/1096-57-0x0000000003870000-0x0000000003971000-memory.dmp

Filesize
1.0MB

Download
memory/1096-60-0x00000000778C0000-0x0000000077A69000-memory.dmp

Filesize
1.7MB

Download
memory/1096-61-0x0000000077AA0000-0x0000000077C20000-memory.dmp

Filesize
1.5MB

Download
memory/1096-54-0x00000000768A1000-0x00000000768A3000-memory.dmp

Filesize
8KB

Download
memory/1096-64-0x0000000077AA0000-0x0000000077C20000-memory.dmp

Filesize
1.5MB

Download
memory/1096-71-0x0000000077AA0000-0x0000000077C20000-memory.dmp

Filesize
1.5MB

Download
memory/1796-63-0x0000000000FC8A9E-mapping.dmp

Download
memory/1796-69-0x00000000778C0000-0x0000000077A69000-memory.dmp

Filesize
1.7MB

Download
memory/1796-66-0x0000000000080000-0x0000000000180000-memory.dmp

Filesize
1024KB

Download
memory/1796-65-0x0000000000080000-0x0000000000180000-memory.dmp

Filesize
1024KB

Download

pid	process
1096	0a42672ca92fc042efc43ed753c21bf10d56d1a2b2cd03928ea55ff3eb2d7b37.exe
1796	caspol.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads