gurcu | c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

Analysis

max time kernel
78s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2023 12:30

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General

Target

m1f1f3a069223072f8d6802a079235d.exe
Size

306KB
MD5

4b36dcaa94c3eca48a6292bd670ffe79
SHA1

705484e61ac39ba02cc80903be0da6ce74333334
SHA256

c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9
SHA512

cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a
SSDEEP

3072:71E/yXS0m2pOVLVewP2D/kIyC+mvXi1QJIkjXAToknBq9tT/8RJ6W3t3dpdQGqKI:7E2mDMtqa5EOTeKXAllKD9bmTneefA

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6209822134:AAHQxD-CI1YDVcNbXijXHlonsEUgv3dfYtg/sendMessage?chat_id=-1001529292045

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-1-5-21-2415528079-3794552930-4264847036-1000\Control Panel\International\Geo\Nation	m1f1f3a069223072f8d6802a079235d.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Control Panel\International\Geo\Nation	m1f1f3a069223072f8d6802a079235d.exe

Executes dropped EXE 2 IoCs

pid	Process
4424	m1f1f3a069223072f8d6802a079235d.exe
1276	tor.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-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.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
73	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
4984	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2968	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4424	m1f1f3a069223072f8d6802a079235d.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5072	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	4424	m1f1f3a069223072f8d6802a079235d.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 5072 wrote to memory of 1944	5072	m1f1f3a069223072f8d6802a079235d.exe	87
PID 5072 wrote to memory of 1944	5072	m1f1f3a069223072f8d6802a079235d.exe	87
PID 1944 wrote to memory of 2784	1944	cmd.exe	89
PID 1944 wrote to memory of 2784	1944	cmd.exe	89
PID 1944 wrote to memory of 2968	1944	cmd.exe	90
PID 1944 wrote to memory of 2968	1944	cmd.exe	90
PID 1944 wrote to memory of 4984	1944	cmd.exe	91
PID 1944 wrote to memory of 4984	1944	cmd.exe	91
PID 1944 wrote to memory of 4424	1944	cmd.exe	92
PID 1944 wrote to memory of 4424	1944	cmd.exe	92
PID 4424 wrote to memory of 3660	4424	m1f1f3a069223072f8d6802a079235d.exe	99
PID 4424 wrote to memory of 3660	4424	m1f1f3a069223072f8d6802a079235d.exe	99
PID 4424 wrote to memory of 1276	4424	m1f1f3a069223072f8d6802a079235d.exe	101
PID 4424 wrote to memory of 1276	4424	m1f1f3a069223072f8d6802a079235d.exe	101

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-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe

C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe
"C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5072
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2784
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2968
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4984
- - C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:4424
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp976D.tmp" -C "C:\Users\Admin\AppData\Local\d67800nkmj"
      4⤵
      PID:3660
  - - C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe
      "C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:1276

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\m1f1f3a069223072f8d6802a079235d.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe

Filesize
306KB

MD5
4b36dcaa94c3eca48a6292bd670ffe79

SHA1
705484e61ac39ba02cc80903be0da6ce74333334

SHA256
c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

SHA512
cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe

Filesize
306KB

MD5
4b36dcaa94c3eca48a6292bd670ffe79

SHA1
705484e61ac39ba02cc80903be0da6ce74333334

SHA256
c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

SHA512
cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp976D.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\data\cached-microdesc-consensus.tmp

Filesize
2.7MB

MD5
ceddd0001801a41dceff7f58998f7d2c

SHA1
99a4fca50689f85a944ff4e7c7d5a65bd4ed7510

SHA256
6223658daee847b59bf381b44aae15edeb2b0da54bbad220c839c4d4eb88f5ce

SHA512
d818acc11e01a57eb7c8622f1b961050d9889d5d31276acc0390526d3787d1e424a7b07d5f314e948fad7a3407618a4f1313c42e407f70f317eaed0f0c985a6f

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\data\cached-microdescs.new

Filesize
13.0MB

MD5
397e10a9bb2f1d1ae2b20bb883be32d9

SHA1
8d612fee597e5129ea5c194ab9afcc0b5d23b055

SHA256
bf549488e7cf64002aaea2f8a08bc70f4e8e91841a43fddbe9d80c12b4f8cfbe

SHA512
402db396cb9dfefa1735ac0df6b1cc3ade628ad0ba17a59b51bd7294a09a13cfcc1cb8bf665409082c833409d6b7360077fa8e4a5d8938a9d11d183f867d50b4

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\host\hostname

Filesize
64B

MD5
5914d95661d1d4921370fe5db8c4613f

SHA1
9e4716bf780cb2c5d10c61476e24fbaeb77722dd

SHA256
d634cb9565b391978445ca29c1bc456fe61672bdcefbb248eb380f0e9a418990

SHA512
e5bc0cbd230debb9edad95ad9aee5531effd0d7223abaed0707b22f3abc8340ea7a0cc1456358c092572e3bae10c05092a3c2a1e4f9823a9cfb59f83cce19f32

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt

Filesize
218B

MD5
6b351be29db83d0612fe7f987fd07b5d

SHA1
53aadd51c9ab0acebc81704d40d3efa2cf92ee41

SHA256
0761d5b6ffea0890ac6a02f2781366be7d081b941a2f7795f825bb00cf859086

SHA512
fdede3606a2e39ae37ff636408114d4cfa0974425aa7f6f2aae10daa821e4e61051fe5e49f192dbb4d64d9b154d0e47735b6f5470c29ad6fb63f7e9d0c33fd68

Download Submit
memory/4424-12-0x000001FDB38D0000-0x000001FDB38E0000-memory.dmp

Filesize
64KB

Download
memory/4424-11-0x00007FFEF80A0000-0x00007FFEF8B61000-memory.dmp

Filesize
10.8MB

Download
memory/4424-40-0x00007FFEF80A0000-0x00007FFEF8B61000-memory.dmp

Filesize
10.8MB

Download
memory/4424-41-0x000001FDB38D0000-0x000001FDB38E0000-memory.dmp

Filesize
64KB

Download
memory/5072-0-0x000001FAFF380000-0x000001FAFF3D2000-memory.dmp

Filesize
328KB

Download
memory/5072-6-0x00007FFEF8C60000-0x00007FFEF9721000-memory.dmp

Filesize
10.8MB

Download
memory/5072-4-0x000001FA9A4C0000-0x000001FA9A4D0000-memory.dmp

Filesize
64KB

Download
memory/5072-3-0x00007FFEF8C60000-0x00007FFEF9721000-memory.dmp

Filesize
10.8MB

Download