gurcu | 8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3

Analysis

max time kernel
25s
max time network
81s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
26-07-2023 13:30

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General

Target

loader.exe
Size

401KB
MD5

69e3cdc923b668aec4cb405c040565c6
SHA1

6a675ebf6f241e543f7bb50ccc8ead462a427880
SHA256

8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3
SHA512

5580919f6710fc210f079875eae22a87c85e854b57f59d10fc22680460f370154d7d223a66c9797387e4675a7954ba6f051a34571499481927980eb9ebf07cdb
SSDEEP

6144:+CGmWI/2hvRn6Ie646G0D1eBlxy9bAmI6:+KWI/8B6Q9b5eBlxnmI6

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6193093056:AAHzyNGUGS9aUG6CCx6ENLoXpCFLzEQywIQ/sendMessage?chat_id=1098292643

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\Control Panel\International\Geo\Nation	loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\Control Panel\International\Geo\Nation	loader.exe

Executes dropped EXE 3 IoCs

pid	Process
4300	loader.exe
1596	tor.exe
3308	loader.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
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	loader.exe
Key opened	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	loader.exe
Key opened	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	loader.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
165	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4112	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1608	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4300	loader.exe
4300	loader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1432	loader.exe
Token: SeDebugPrivilege	4300	loader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4300	loader.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1432 wrote to memory of 4476	1432	loader.exe	84
PID 1432 wrote to memory of 4476	1432	loader.exe	84
PID 4476 wrote to memory of 4548	4476	cmd.exe	85
PID 4476 wrote to memory of 4548	4476	cmd.exe	85
PID 4476 wrote to memory of 1608	4476	cmd.exe	86
PID 4476 wrote to memory of 1608	4476	cmd.exe	86
PID 4476 wrote to memory of 4112	4476	cmd.exe	92
PID 4476 wrote to memory of 4112	4476	cmd.exe	92
PID 4476 wrote to memory of 4300	4476	cmd.exe	94
PID 4476 wrote to memory of 4300	4476	cmd.exe	94
PID 4300 wrote to memory of 2360	4300	loader.exe	97
PID 4300 wrote to memory of 2360	4300	loader.exe	97
PID 4300 wrote to memory of 1596	4300	loader.exe	100
PID 4300 wrote to memory of 1596	4300	loader.exe	100

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	loader.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4176143399-3250363947-192774652-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	loader.exe

C:\Users\Admin\AppData\Local\Temp\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1432
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "loader" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\loader.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4476
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4548
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:1608
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "loader" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4112
- - C:\Users\Admin\AppData\Local\TeamViewer\loader.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:4300
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmpF0F7.tmp" -C "C:\Users\Admin\AppData\Local\jjmzzxbvaf"
      4⤵
      PID:2360
  - - C:\Users\Admin\AppData\Local\jjmzzxbvaf\tor\tor.exe
      "C:\Users\Admin\AppData\Local\jjmzzxbvaf\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\jjmzzxbvaf\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:1596

C:\Users\Admin\AppData\Local\TeamViewer\loader.exe
C:\Users\Admin\AppData\Local\TeamViewer\loader.exe
1⤵
- Executes dropped EXE
PID:3308

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\loader.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\loader.exe

Filesize
401KB

MD5
69e3cdc923b668aec4cb405c040565c6

SHA1
6a675ebf6f241e543f7bb50ccc8ead462a427880

SHA256
8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3

SHA512
5580919f6710fc210f079875eae22a87c85e854b57f59d10fc22680460f370154d7d223a66c9797387e4675a7954ba6f051a34571499481927980eb9ebf07cdb

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\loader.exe

Filesize
401KB

MD5
69e3cdc923b668aec4cb405c040565c6

SHA1
6a675ebf6f241e543f7bb50ccc8ead462a427880

SHA256
8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3

SHA512
5580919f6710fc210f079875eae22a87c85e854b57f59d10fc22680460f370154d7d223a66c9797387e4675a7954ba6f051a34571499481927980eb9ebf07cdb

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\loader.exe

Filesize
401KB

MD5
69e3cdc923b668aec4cb405c040565c6

SHA1
6a675ebf6f241e543f7bb50ccc8ead462a427880

SHA256
8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3

SHA512
5580919f6710fc210f079875eae22a87c85e854b57f59d10fc22680460f370154d7d223a66c9797387e4675a7954ba6f051a34571499481927980eb9ebf07cdb

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF0F7.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\jjmzzxbvaf\data\cached-microdesc-consensus.tmp

Filesize
2.4MB

MD5
9c51572e470c337066703261d26f0828

SHA1
f8698e779dbfb6e768a73c283cf105147cfa5f36

SHA256
e69a860ddf121131d36f11b84359753b3c9991c488469345f6f0c6f4640afbf1

SHA512
3ac421923caec92941d7ba150669e1ebd975096263ced3f82e7bce9d80a0bf72f080158d40d8d4afcbd8512cf8d4d83056a981f2a7237dfc1312899dee743390

Download Submit
C:\Users\Admin\AppData\Local\jjmzzxbvaf\data\cached-microdescs.new

Filesize
6.6MB

MD5
db36c2059faa5b3348257610580586c3

SHA1
7144585a14cd234cd4bd3852f8ee77fdb354fdf3

SHA256
cb12e9ef3c02691a043c0a440830f4d9081b2a10f791f8602d5b56279c5a62fa

SHA512
f50efd184a63dd636e32157f9960caf1749d2abbd3d588109c96527be54f64d84a23d4aa93f503332fe5f416ad435f54ad256cb692e8242951ab9b3a4586c548

Download Submit
C:\Users\Admin\AppData\Local\jjmzzxbvaf\host\hostname

Filesize
64B

MD5
23508a382f528048b65d288546544372

SHA1
af454e8806cfda1b686a5ecacf7bcfb19474ff1e

SHA256
4cf03d030d83c082c7f512996db30eed03119573dbbadaead43f5304375ff26a

SHA512
5b1dbe2742db3fc5d407e9a0e7dbceb8373ba0fd9fcf1ba7eadbf6d1a0b5ea09b1d33b773870c3e40c552d803e8eac5856a947cfff195b9553959211da623c31

Download Submit
C:\Users\Admin\AppData\Local\jjmzzxbvaf\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\jjmzzxbvaf\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\jjmzzxbvaf\torrc.txt

Filesize
218B

MD5
62b69a4bea21469d9b3b14f427c4bd57

SHA1
7fd2e2c0d665b681f13d6d72e92a83d9e4bf4561

SHA256
a9424283b9982acf790ac26dc7e6f54e663483227fa888be2dd5b06973488bb7

SHA512
3acb0bb9aa1f0acd1529a9d6861bb8d5c3355cdd970feef7fb94b676b36246a4449a2a923ccad8f416439b392f01183028903ded6b7c6d9464a4e2ceab0bdc72

Download Submit
memory/1432-137-0x000001C0F05C0000-0x000001C0F05D0000-memory.dmp

Filesize
64KB

Download
memory/1432-139-0x00007FF8C6EE0000-0x00007FF8C79A1000-memory.dmp

Filesize
10.8MB

Download
memory/1432-133-0x000001C0EDF60000-0x000001C0EDFC8000-memory.dmp

Filesize
416KB

Download
memory/1432-134-0x00007FF8C6EE0000-0x00007FF8C79A1000-memory.dmp

Filesize
10.8MB

Download
memory/3308-200-0x00007FF8C5C70000-0x00007FF8C6731000-memory.dmp

Filesize
10.8MB

Download
memory/4300-145-0x0000021BC3CD0000-0x0000021BC3CE0000-memory.dmp

Filesize
64KB

Download
memory/4300-173-0x00007FF8C5C70000-0x00007FF8C6731000-memory.dmp

Filesize
10.8MB

Download
memory/4300-182-0x0000021BC3CD0000-0x0000021BC3CE0000-memory.dmp

Filesize
64KB

Download
memory/4300-144-0x00007FF8C5C70000-0x00007FF8C6731000-memory.dmp

Filesize
10.8MB

Download