umbral | c2896e90b50b14aa6ad8d39f7d828f92e963f6b756e8cb2d075046913e497a81

Analysis

max time kernel
88s
max time network
92s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
07-12-2023 03:18

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General

Target

RC7/RC7.exe
Size

160KB
MD5

40e89aaf41d4ebda079572167d4665e7
SHA1

c14a019a862aa3f595da7d15cc993f4f894d10a5
SHA256

95388dfe045e7e976186c3ab0286ed8aa77bdb299c867f8c3e46f23ff7624a4d
SHA512

035996ef789c0dc972265ec04652d01e1a530e61d4dfdd3fadc6e502a46b054e2b88fd5347d63deba491924b67c466996208f33f9a5019eb60923445551ce554
SSDEEP

3072:Vjt4sK0uoEz8jh6oKyIPw+lV59i/XvGO0EFA0K+ymEN4NI:VjysKJ8cNP779Wvwc19yx

Score

10^/10

umbral xworm rat stealer trojan

Malware Config

Extracted

Family

xworm

owner-cc.gl.at.ply.gg:32281

Attributes

install_file
USB.exe

Extracted

Family

umbral

https://discord.com/api/webhooks/1179573880306806895/9PPafRuKqunRXMBgRp7lwh-lO7PV6gpu6bih39np__mk8ZAghkJ95dBDKUvofe3l-iRe

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
behavioral17/memory/2820-14-0x00000000001A0000-0x00000000001E0000-memory.dmp	family_umbral
behavioral17/files/0x000900000001410b-13.dat	family_umbral
behavioral17/files/0x000900000001410b-12.dat	family_umbral

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral17/files/0x000a000000013a1a-5.dat	family_xworm
behavioral17/files/0x000a000000013a1a-7.dat	family_xworm
behavioral17/memory/2892-10-0x0000000000940000-0x0000000000956000-memory.dmp	family_xworm

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Executes dropped EXE 2 IoCs

pid	Process
2892	XClient.exe
2820	Umbral1.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
14	ip-api.com

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 43 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	Umbral1.exe
Token: SeDebugPrivilege	2892	XClient.exe
Token: SeIncreaseQuotaPrivilege	2588	wmic.exe
Token: SeSecurityPrivilege	2588	wmic.exe
Token: SeTakeOwnershipPrivilege	2588	wmic.exe
Token: SeLoadDriverPrivilege	2588	wmic.exe
Token: SeSystemProfilePrivilege	2588	wmic.exe
Token: SeSystemtimePrivilege	2588	wmic.exe
Token: SeProfSingleProcessPrivilege	2588	wmic.exe
Token: SeIncBasePriorityPrivilege	2588	wmic.exe
Token: SeCreatePagefilePrivilege	2588	wmic.exe
Token: SeBackupPrivilege	2588	wmic.exe
Token: SeRestorePrivilege	2588	wmic.exe
Token: SeShutdownPrivilege	2588	wmic.exe
Token: SeDebugPrivilege	2588	wmic.exe
Token: SeSystemEnvironmentPrivilege	2588	wmic.exe
Token: SeRemoteShutdownPrivilege	2588	wmic.exe
Token: SeUndockPrivilege	2588	wmic.exe
Token: SeManageVolumePrivilege	2588	wmic.exe
Token: 33	2588	wmic.exe
Token: 34	2588	wmic.exe
Token: 35	2588	wmic.exe
Token: SeIncreaseQuotaPrivilege	2588	wmic.exe
Token: SeSecurityPrivilege	2588	wmic.exe
Token: SeTakeOwnershipPrivilege	2588	wmic.exe
Token: SeLoadDriverPrivilege	2588	wmic.exe
Token: SeSystemProfilePrivilege	2588	wmic.exe
Token: SeSystemtimePrivilege	2588	wmic.exe
Token: SeProfSingleProcessPrivilege	2588	wmic.exe
Token: SeIncBasePriorityPrivilege	2588	wmic.exe
Token: SeCreatePagefilePrivilege	2588	wmic.exe
Token: SeBackupPrivilege	2588	wmic.exe
Token: SeRestorePrivilege	2588	wmic.exe
Token: SeShutdownPrivilege	2588	wmic.exe
Token: SeDebugPrivilege	2588	wmic.exe
Token: SeSystemEnvironmentPrivilege	2588	wmic.exe
Token: SeRemoteShutdownPrivilege	2588	wmic.exe
Token: SeUndockPrivilege	2588	wmic.exe
Token: SeManageVolumePrivilege	2588	wmic.exe
Token: 33	2588	wmic.exe
Token: 34	2588	wmic.exe
Token: 35	2588	wmic.exe
Token: SeDebugPrivilege	2892	XClient.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 2892	3044	RC7.exe	28
PID 3044 wrote to memory of 2892	3044	RC7.exe	28
PID 3044 wrote to memory of 2892	3044	RC7.exe	28
PID 3044 wrote to memory of 2820	3044	RC7.exe	29
PID 3044 wrote to memory of 2820	3044	RC7.exe	29
PID 3044 wrote to memory of 2820	3044	RC7.exe	29
PID 2820 wrote to memory of 2588	2820	Umbral1.exe	31
PID 2820 wrote to memory of 2588	2820	Umbral1.exe	31
PID 2820 wrote to memory of 2588	2820	Umbral1.exe	31

C:\Users\Admin\AppData\Local\Temp\RC7\RC7.exe
"C:\Users\Admin\AppData\Local\Temp\RC7\RC7.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Users\Admin\AppData\Local\Temp\XClient.exe
  "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2892
- C:\Users\Admin\AppData\Local\Temp\Umbral1.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral1.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2820
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Umbral1.exe

Filesize
231KB

MD5
5c04d1b604c881ae86da044c2d16b8b2

SHA1
c9f98d064e8284a51d43d72c15211fdd6edee1c8

SHA256
5b0ae3b59dcfbdf94878f652d328c12b61b0783082046815bc6d01fecd8fd769

SHA512
d156d5cab74668e2899aaced344d6d4e8e89eaaa6936c8378f89126747543f063066dd6c91e39203cbad0dfc9027aef5853775cef47751b669de6336d97223d6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Umbral1.exe

Filesize
231KB

MD5
5c04d1b604c881ae86da044c2d16b8b2

SHA1
c9f98d064e8284a51d43d72c15211fdd6edee1c8

SHA256
5b0ae3b59dcfbdf94878f652d328c12b61b0783082046815bc6d01fecd8fd769

SHA512
d156d5cab74668e2899aaced344d6d4e8e89eaaa6936c8378f89126747543f063066dd6c91e39203cbad0dfc9027aef5853775cef47751b669de6336d97223d6

Download Submit
C:\Users\Admin\AppData\Local\Temp\XClient.exe

Filesize
60KB

MD5
fd41a98611978677f1adc60f86383ea0

SHA1
200cfd48d7f7d28cff9c177cdd804e6fd578c015

SHA256
ffc549f9e84b6ecaa96e1cb49c18a8bdd89d536e0556962c88995967009cdc3d

SHA512
87a0d544d9b1dd2b53d40cd54d2c6955927dc287d2cf557eb50f408c3e6002efdac3ecbe908b49bf153bb9276d23e3e459bbaa502167cc52a63ae08a40251270

Download Submit
C:\Users\Admin\AppData\Local\Temp\XClient.exe

Filesize
60KB

MD5
fd41a98611978677f1adc60f86383ea0

SHA1
200cfd48d7f7d28cff9c177cdd804e6fd578c015

SHA256
ffc549f9e84b6ecaa96e1cb49c18a8bdd89d536e0556962c88995967009cdc3d

SHA512
87a0d544d9b1dd2b53d40cd54d2c6955927dc287d2cf557eb50f408c3e6002efdac3ecbe908b49bf153bb9276d23e3e459bbaa502167cc52a63ae08a40251270

Download Submit
memory/2820-14-0x00000000001A0000-0x00000000001E0000-memory.dmp

Filesize
256KB

Download
memory/2820-16-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/2820-18-0x000000001B410000-0x000000001B490000-memory.dmp

Filesize
512KB

Download
memory/2820-33-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/2892-10-0x0000000000940000-0x0000000000956000-memory.dmp

Filesize
88KB

Download
memory/2892-15-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/2892-34-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/3044-0-0x0000000000E70000-0x0000000000E9E000-memory.dmp

Filesize
184KB

Download
memory/3044-2-0x000000001B020000-0x000000001B0A0000-memory.dmp

Filesize
512KB

Download
memory/3044-1-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/3044-17-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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