nymaim | 1fa85bc5be092f8ce92b40378e53f020d99dd0ccf23ccf252c65c9a17ca2bec8

Analysis

max time kernel
69s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2022, 14:17

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General

Target
file.exe
Size 2.1MB
Sample221212-rlpmsabe43
SHA256 1fa85bc5be092f8ce92b40378e53f020d99dd0ccf23ccf252c65c9a17ca2bec8
MD5 2abacf9f2a4b0212fc3780c9097e395d
SHA1 7063c385f4106097752721b6810818d127551995
SHA512 39c99a3545c660582dd89f8c29a035d7ca4b829f1290ab08e9aa196a39687e5443c8c11c13a142de6f57dcadc2e8daac1453bd4e3d2d080456911a6d9e7654ab
SSDEEP 24576:RizFsFkXOsR1jVqOG4ZTMWyPn949m73hhvETGGypLAh4Guc4ioBg480xPOjsUA3x:6FHfRqOxc9i4Rh8dyp6PKpTx34IZZT
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
4116	is-NM1J8.tmp
4708	nwFolders.exe
4648	HoAkVwKHSBTmCt.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	nwFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4116	is-NM1J8.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NM1J8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GB8A6.tmp	is-NM1J8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-62E9K.tmp	is-NM1J8.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NM1J8.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nwFolders.exe	is-NM1J8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GNT4N.tmp	is-NM1J8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5N58O.tmp	is-NM1J8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9S3JJ.tmp	is-NM1J8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HOGDS.tmp	is-NM1J8.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4852	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4708	nwFolders.exe
4708	nwFolders.exe
4708	nwFolders.exe
4708	nwFolders.exe
4708	nwFolders.exe
4708	nwFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4852	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 4116	4140	file.exe	81
PID 4140 wrote to memory of 4116	4140	file.exe	81
PID 4140 wrote to memory of 4116	4140	file.exe	81
PID 4116 wrote to memory of 4708	4116	is-NM1J8.tmp	82
PID 4116 wrote to memory of 4708	4116	is-NM1J8.tmp	82
PID 4116 wrote to memory of 4708	4116	is-NM1J8.tmp	82
PID 4708 wrote to memory of 4648	4708	nwFolders.exe	83
PID 4708 wrote to memory of 4648	4708	nwFolders.exe	83
PID 4708 wrote to memory of 4648	4708	nwFolders.exe	83
PID 4708 wrote to memory of 3676	4708	nwFolders.exe	91
PID 4708 wrote to memory of 3676	4708	nwFolders.exe	91
PID 4708 wrote to memory of 3676	4708	nwFolders.exe	91
PID 3676 wrote to memory of 4852	3676	cmd.exe	93
PID 3676 wrote to memory of 4852	3676	cmd.exe	93
PID 3676 wrote to memory of 4852	3676	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Users\Admin\AppData\Local\Temp\is-4NU3N.tmp\is-NM1J8.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-4NU3N.tmp\is-NM1J8.tmp" /SL4 $90064 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1994320 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4116
- - C:\Program Files (x86)\PrintFolders\nwFolders.exe
    "C:\Program Files (x86)\PrintFolders\nwFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4708
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\HoAkVwKHSBTmCt.exe
      4⤵
      Executes dropped EXE
      PID:4648
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nwFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nwFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3676
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nwFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4852

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

nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.2MB
SHA256 995a6eeb6279c6064142c7d59d2821280206327cb1730d265c867a5424e7dfdb
MD5 8eeeadd6eefc76c1a1860bc61fa0c84c
SHA1 efd142dbd82c68e8e0749c1d4ea4d64c09173310
SHA512 0530bf2beda2641b05985e06b132edf6a6385c3817156a053939d596f5980e9f52c594ab09d6b7038c864c0f3a3b42460790fdfc8e8c40be82863eb72406f98f
SSDEEP 49152:/NDWUOxdZJbl5opakRZpOj6lsaA+TufaRh7LQa2iEGI3x:/NDWl7ZJJ5opaa06lsapufu1sa2iEGy
MD5 SHA1 SHA512 SSDEEP

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nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.2MB
SHA256 995a6eeb6279c6064142c7d59d2821280206327cb1730d265c867a5424e7dfdb
MD5 8eeeadd6eefc76c1a1860bc61fa0c84c
SHA1 efd142dbd82c68e8e0749c1d4ea4d64c09173310
SHA512 0530bf2beda2641b05985e06b132edf6a6385c3817156a053939d596f5980e9f52c594ab09d6b7038c864c0f3a3b42460790fdfc8e8c40be82863eb72406f98f
SSDEEP 49152:/NDWUOxdZJbl5opakRZpOj6lsaA+TufaRh7LQa2iEGI3x:/NDWl7ZJJ5opaa06lsapufu1sa2iEGy
MD5 SHA1 SHA512 SSDEEP

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is-NM1J8.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4NU3N.tmp\is-NM1J8.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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is-NM1J8.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4NU3N.tmp\is-NM1J8.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-7RCSO.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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HoAkVwKHSBTmCt.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\HoAkVwKHSBTmCt.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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HoAkVwKHSBTmCt.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\HoAkVwKHSBTmCt.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/4140-156-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4140-137-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4140-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4708-142-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/4708-144-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/4708-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4708-152-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/4708-143-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/4708-155-0x0000000000400000-0x000000000153C000-memory.dmp

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