umbral | 54f3524bd85f2a9d6633f8442039e2cf49d206c29ef660e650c7137d2d9b451d

Analysis

max time kernel
83s
max time network
150s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
21-06-2023 23:12

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General

Target

Umbral.exe
Size

227KB
MD5

8b456d26ac4c2edc6fd1f47796a65151
SHA1

92054d829e679a748559264864b7f4d4d1bb96e2
SHA256

e7f32c2d9d9aa4a4b9938f4c782fe31aa75e1e1c479e8ada580170193d250eac
SHA512

3f807578f882afecf40ca992d3b237a04df136f95a52948c55efa0e0a13c8b38a68f21b68ed261062d8a42ed78bd29e942c065e522fe16415f0acdbdab174329
SSDEEP

6144:+loZM+rIkd8g+EtXHkv/iD4Nqjn5nsAvHOXZkQldhb8e1mgi:ooZtL+EP8Nqjn5nsAvHOXZkQlTC

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/memory/2044-54-0x0000000000BA0000-0x0000000000BE0000-memory.dmp	family_umbral
behavioral1/memory/2044-55-0x000000001B5B0000-0x000000001B630000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	chrome.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
580	chrome.exe
580	chrome.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2044	Umbral.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe
Token: SeShutdownPrivilege	580	chrome.exe

Suspicious use of FindShellTrayWindow 34 IoCs

pid	Process
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe

Suspicious use of SendNotifyMessage 32 IoCs

pid	Process
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe
580	chrome.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 580 wrote to memory of 1224	580	chrome.exe	29
PID 580 wrote to memory of 1224	580	chrome.exe	29
PID 580 wrote to memory of 1224	580	chrome.exe	29
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1660	580	chrome.exe	31
PID 580 wrote to memory of 1868	580	chrome.exe	32
PID 580 wrote to memory of 1868	580	chrome.exe	32
PID 580 wrote to memory of 1868	580	chrome.exe	32
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33
PID 580 wrote to memory of 972	580	chrome.exe	33

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2044
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2916

C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe"
1⤵
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:580
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef1b49758,0x7fef1b49768,0x7fef1b49778
  2⤵
  PID:1224
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1188 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:2
  2⤵
  PID:1660
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=1464 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:8
  2⤵
  PID:1868
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1660 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:8
  2⤵
  PID:972
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2240 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:1
  2⤵
  PID:612
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2192 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:1
  2⤵
  PID:1944
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1484 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:2
  2⤵
  PID:2140
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=2380 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:1
  2⤵
  PID:2264
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3904 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:8
  2⤵
  PID:2300
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=4056 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:8
  2⤵
  PID:2352
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=11 --mojo-platform-channel-handle=4156 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:1
  2⤵
  PID:2480
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4368 --field-trial-handle=1236,i,12870500928037936925,8409260700452265073,131072 /prefetch:8
  2⤵
  PID:2156

C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
1⤵
PID:1556

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2708

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x50c
1⤵
PID:2816

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\43eefa30-6313-4358-9625-3eee5cdea1be.tmp

Filesize
4KB

MD5
21571ff1d0e999f2bb7ebb9371def0c0

SHA1
bc96eb3e42a0964bc2657d8ee7700c7f3940c9a4

SHA256
4da43f6f8e4995176be38a2dbac1198d3ed3a34db519c01a7a3239f99b062fe9

SHA512
89551b583b521b4b9906218ca067ac6cfbd118da008dbe29e4acfba3f2f0eec2eaf7ab0016d11de2ca75221a413fe8763e3c8d86d6b54e7845cfbf4aba467609

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GCM Store\Encryption\CURRENT~RF6da0c3.TMP

Filesize
16B

MD5
46295cac801e5d4857d09837238a6394

SHA1
44e0fa1b517dbf802b18faf0785eeea6ac51594b

SHA256
0f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443

SHA512
8969402593f927350e2ceb4b5bc2a277f3754697c1961e3d6237da322257fbab42909e1a742e22223447f3a4805f8d8ef525432a7c3515a549e984d3eff72b23

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1

Filesize
264KB

MD5
f50f89a0a91564d0b8a211f8921aa7de

SHA1
112403a17dd69d5b9018b8cede023cb3b54eab7d

SHA256
b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

SHA512
bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity

Filesize
359B

MD5
ceac58aad1e362110c0eecfbbd986595

SHA1
63fb8796a86aa5d75f9e82cc4c84a35b97b06de5

SHA256
426054e521656c9663566296e052733ef4134b694521e3f32fee5318638408a3

SHA512
da46f56e8e0156c09995c58116d1081083913848db3ca44455aa0810fe5fd93a6fcd46590c2c3ec7eab94995bb07156ea07dfe295782a75ed519d5d1aebf6e28

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

Filesize
4KB

MD5
815701e7dcee27cff01762dffcaa7e22

SHA1
0e79132ad0008882e799c1b6fffae914a520951d

SHA256
529e701160a7cd49a425b8068210502f53e5721adbf93827b6c01984399e6c60

SHA512
cca38e96a1cf34cb664f5f9c457c13dfdff799ca801827d222326810590bbfa7b87147acf7248d4f76c7330f1f9081f5db41f7784ea4c60a32ae05787345813c

Download Submit
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\000004.dbtmp

Filesize
16B

MD5
6752a1d65b201c13b62ea44016eb221f

SHA1
58ecf154d01a62233ed7fb494ace3c3d4ffce08b

SHA256
0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

SHA512
9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

Download Submit
memory/2044-54-0x0000000000BA0000-0x0000000000BE0000-memory.dmp

Filesize
256KB

Download
memory/2044-55-0x000000001B5B0000-0x000000001B630000-memory.dmp

Filesize
512KB

Download
memory/2044-56-0x000000001B5B0000-0x000000001B630000-memory.dmp

Filesize
512KB

Download