ramnit | 876c5cea11bbbcbe4089a3d0e8f95244cf855d3668e9bf06a97d8e20c1ff237c

Resubmissions

07/07/2022, 08:25

220707-ka84qaahd310

07/07/2022, 03:21

220707-dwmdhsefa410

Analysis

max time kernel
79s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
07/07/2022, 03:21

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General

Target
CacheMgrSrv.exe.virus.exe
Size 82KB
Sample220707-dwmdhsefa4
SHA256 876c5cea11bbbcbe4089a3d0e8f95244cf855d3668e9bf06a97d8e20c1ff237c
MD5 44e92c4b5f440b756f8fb0c9eeb460b2
SHA1 ed5bf6e6e4f2b71ba1e0f73381ee64155f9722c2
SHA512 378f3fa6f013437491f8c9b1c6bf0bc9641c9bc3e37f8f6c2fabc7402e8c0050d006bd84e251bd801cd37c0be9ded9277d52bc73b64f68aa14b8a6c3ff3f4566
MD5 SHA1 SHA512

Score

10^/10

ramnit banker spyware stealer trojan upx worm

Malware Config

Signatures

Ramnit
Ramnit is a versatile family that holds viruses, worms, and Trojans.
trojan spyware stealer worm banker ramnit

Executes dropped EXE 1 IoCs

pid	Process
2032	DesktopLayer.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2032-135-0x0000000000400000-0x000000000042A000-memory.dmp	upx
behavioral2/memory/4148-133-0x0000000000400000-0x000000000042A000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	CacheMgrSrv.exe.virus.exe
File opened for modification	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	CacheMgrSrv.exe.virus.exe
File opened for modification	C:\Program Files (x86)\Microsoft\px8429.tmp	CacheMgrSrv.exe.virus.exe

Modifies Internet Explorer settings 1 TTPs 28 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{EE668816-FDA3-11EC-AD90-7E149D876A3C} = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3271071129"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3271071129"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3280289335"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "30970288"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "30970288"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "30970288"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "363929081"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2032	DesktopLayer.exe
2032	DesktopLayer.exe
2032	DesktopLayer.exe
2032	DesktopLayer.exe
2032	DesktopLayer.exe
2032	DesktopLayer.exe
2032	DesktopLayer.exe
2032	DesktopLayer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5028	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5028	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
5028	iexplore.exe
5028	iexplore.exe
5008	IEXPLORE.EXE
5008	IEXPLORE.EXE
5008	IEXPLORE.EXE
5008	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4148 wrote to memory of 2032	4148	CacheMgrSrv.exe.virus.exe	84
PID 4148 wrote to memory of 2032	4148	CacheMgrSrv.exe.virus.exe	84
PID 4148 wrote to memory of 2032	4148	CacheMgrSrv.exe.virus.exe	84
PID 2032 wrote to memory of 5028	2032	DesktopLayer.exe	85
PID 2032 wrote to memory of 5028	2032	DesktopLayer.exe	85
PID 5028 wrote to memory of 5008	5028	iexplore.exe	86
PID 5028 wrote to memory of 5008	5028	iexplore.exe	86
PID 5028 wrote to memory of 5008	5028	iexplore.exe	86

C:\Users\Admin\AppData\Local\Temp\CacheMgrSrv.exe.virus.exe
"C:\Users\Admin\AppData\Local\Temp\CacheMgrSrv.exe.virus.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Program Files (x86)\Microsoft\DesktopLayer.exe
  "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\Program Files\Internet Explorer\iexplore.exe
    "C:\Program Files\Internet Explorer\iexplore.exe"
    3⤵
    - Modifies Internet Explorer settings
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5028
  - - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:5028 CREDAT:17410 /prefetch:2
      4⤵
      Modifies Internet Explorer settings
      Suspicious use of SetWindowsHookEx
      PID:5008

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

DesktopLayer.exe

Path C:\Program Files (x86)\Microsoft\DesktopLayer.exe
Size 82KB
SHA256 876c5cea11bbbcbe4089a3d0e8f95244cf855d3668e9bf06a97d8e20c1ff237c
MD5 44e92c4b5f440b756f8fb0c9eeb460b2
SHA1 ed5bf6e6e4f2b71ba1e0f73381ee64155f9722c2
SHA512 378f3fa6f013437491f8c9b1c6bf0bc9641c9bc3e37f8f6c2fabc7402e8c0050d006bd84e251bd801cd37c0be9ded9277d52bc73b64f68aa14b8a6c3ff3f4566
SSDEEP 1536:3Qz6R5eAuSLOrx/Zq3ykKmMFb+Yy8yoN4yjNEWt0kaLFb8:3Qz6R5eAuOOX7SMpNjxN4yjNEWt0kae
MD5 SHA1 SHA512 SSDEEP

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DesktopLayer.exe

Path C:\Program Files (x86)\Microsoft\DesktopLayer.exe
Size 82KB
SHA256 876c5cea11bbbcbe4089a3d0e8f95244cf855d3668e9bf06a97d8e20c1ff237c
MD5 44e92c4b5f440b756f8fb0c9eeb460b2
SHA1 ed5bf6e6e4f2b71ba1e0f73381ee64155f9722c2
SHA512 378f3fa6f013437491f8c9b1c6bf0bc9641c9bc3e37f8f6c2fabc7402e8c0050d006bd84e251bd801cd37c0be9ded9277d52bc73b64f68aa14b8a6c3ff3f4566
SSDEEP 1536:3Qz6R5eAuSLOrx/Zq3ykKmMFb+Yy8yoN4yjNEWt0kaLFb8:3Qz6R5eAuOOX7SMpNjxN4yjNEWt0kae
MD5 SHA1 SHA512 SSDEEP

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7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Size 471B
SHA256 202f370ff58874e4e5e56ff634031c48ef1ee599db976ebd25790c65f8780ac2
MD5 f46df6d8b4b4db4e1dc315559df90120
SHA1 6e276344ce29422caf44382d1976bca7bf06c6ed
SHA512 b32a203bfaabef4763f1c0de9398d52da1465c234b82da541e9987d5114efae93e391d8437018f0c34d70464d5c9b1fb3c084b3adb5ad430f7cb3459aed42706
MD5 SHA1 SHA512

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7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Size 404B
SHA256 e793bfd94bce4341ff5d34c4217688c74dce14da1d54dd989b5ef4938c3ca61d
MD5 203463f10c597b66a06ec5b97b467f3f
SHA1 c0401d627410688be92e755226f1c37af99cc12f
SHA512 8e39d4e8473738820966ba669172124e0292b76e75bf241d63fdfb956d37e46333b1222899624af732401e64f728f0345e31c36b59e7cc6bc8c266d62ab151f9
MD5 SHA1 SHA512

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memory/2032-134-0x0000000000470000-0x000000000047F000-memory.dmp

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memory/2032-135-0x0000000000400000-0x000000000042A000-memory.dmp

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memory/4148-133-0x0000000000400000-0x000000000042A000-memory.dmp

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