guloader | 35b7f8f367d09665365f36797864f1d2cc886b1e338bb55773c4d20bd03b0a44

General

Target

Geo Ltd_doc_Invoice_img_021113210211.exe
Size

402KB
MD5

dc29a3a35a1663ab09f9eaa8c206358d
SHA1

46bd5ff1f3bcee5d6eaa9a83934e285e81c67e8a
SHA256

6aed342a5d0971e9b0b9f962f810d5f439b677905292e744abae9d78a9faacfa
SHA512

836121365cc99519435970993744a9723f19c10476b1caac466b82d393544c57c11ea7f14b0508c304283d2d6266e4025f126abc6e8001e24a30c4ecedf6e413
SSDEEP

6144:EspNjlsz0aRDCs8c8ewoeslml+dHRcHck62PHlvwcSlyuaYit4ylMvKGc:EciTR2seeflHETplvbUyuuWCp

Score

10^/10

guloader discovery downloader persistence

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

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	Geo Ltd_doc_Invoice_img_021113210211.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe

Loads dropped DLL 2 IoCs

pid	Process
2040	Geo Ltd_doc_Invoice_img_021113210211.exe
2040	Geo Ltd_doc_Invoice_img_021113210211.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1437583205-2177757337-340526699-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	caspol.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1437583205-2177757337-340526699-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder1\\Afspadserer.exe"	caspol.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

pid	Process
2040	Geo Ltd_doc_Invoice_img_021113210211.exe
856	caspol.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2040 set thread context of 856	2040	Geo Ltd_doc_Invoice_img_021113210211.exe	28

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Kommetarer.ini	Geo Ltd_doc_Invoice_img_021113210211.exe

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2040	Geo Ltd_doc_Invoice_img_021113210211.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 856	2040	Geo Ltd_doc_Invoice_img_021113210211.exe	28
PID 2040 wrote to memory of 856	2040	Geo Ltd_doc_Invoice_img_021113210211.exe	28
PID 2040 wrote to memory of 856	2040	Geo Ltd_doc_Invoice_img_021113210211.exe	28
PID 2040 wrote to memory of 856	2040	Geo Ltd_doc_Invoice_img_021113210211.exe	28
PID 2040 wrote to memory of 856	2040	Geo Ltd_doc_Invoice_img_021113210211.exe	28

C:\Users\Admin\AppData\Local\Temp\Geo Ltd_doc_Invoice_img_021113210211.exe
"C:\Users\Admin\AppData\Local\Temp\Geo Ltd_doc_Invoice_img_021113210211.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\Geo Ltd_doc_Invoice_img_021113210211.exe"
  2⤵
  - Checks QEMU agent file
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:856

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabD57B.tmp

Filesize
62KB

MD5
3ac860860707baaf32469fa7cc7c0192

SHA1
c33c2acdaba0e6fa41fd2f00f186804722477639

SHA256
d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

SHA512
d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarD60A.tmp

Filesize
164KB

MD5
4ff65ad929cd9a367680e0e5b1c08166

SHA1
c0af0d4396bd1f15c45f39d3b849ba444233b3a2

SHA256
c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

SHA512
f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

Download Submit
C:\Users\Admin\AppData\Local\Temp\nst1576.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
\Users\Admin\AppData\Local\Temp\nst1576.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
\Users\Admin\AppData\Local\Temp\nst1576.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/856-69-0x0000000000620000-0x0000000001A05000-memory.dmp

Filesize
19.9MB

Download
memory/856-71-0x0000000000620000-0x0000000001A05000-memory.dmp

Filesize
19.9MB

Download
memory/856-72-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/2040-67-0x0000000004DF0000-0x00000000061D5000-memory.dmp

Filesize
19.9MB

Download
memory/2040-68-0x0000000004DF0000-0x00000000061D5000-memory.dmp

Filesize
19.9MB

Download

Analysis

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