nymaim | 22d43ef830e75b63f416fcd1bac5da6d743dbafd025b8c20346daa664f090eee

Analysis

max time kernel
144s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
28/11/2022, 02:05

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General

Target
file.exe
Size 2.2MB
Sample221128-ch22daff65
SHA256 22d43ef830e75b63f416fcd1bac5da6d743dbafd025b8c20346daa664f090eee
MD5 4018add4b5529e641d680ed6d119563c
SHA1 6f66690c0b246fb3d0c9b3d382da1574442fe097
SHA512 75582b761b7ef228b7a38212e8c56d81c1d923c4e882adde0cf93ad3baed12a45d812395a3822406c2442696eac81258894ffa13a6ac36cd2c5175d37f032e20
SSDEEP 49152:8eCAmB6bENBulb8M6FKEV980zfeVZyl1dDPjzSRaAft870EuLLqAG5cye:8ePe6QNBulb8gYzfwa7jPyaAVw0EUqXa
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
3420	is-DV0F7.tmp
4348	PrintFolders.exe
3980	oOGRCE.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3420	is-DV0F7.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\is-AERCM.tmp	is-DV0F7.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-DV0F7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TMQ7M.tmp	is-DV0F7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0D4QQ.tmp	is-DV0F7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RBGP7.tmp	is-DV0F7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-85R6I.tmp	is-DV0F7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UJ0JI.tmp	is-DV0F7.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-DV0F7.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-DV0F7.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
3860	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4348	PrintFolders.exe
4348	PrintFolders.exe
4348	PrintFolders.exe
4348	PrintFolders.exe
4348	PrintFolders.exe
4348	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3860	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 3420	1048	file.exe	77
PID 1048 wrote to memory of 3420	1048	file.exe	77
PID 1048 wrote to memory of 3420	1048	file.exe	77
PID 3420 wrote to memory of 4348	3420	is-DV0F7.tmp	78
PID 3420 wrote to memory of 4348	3420	is-DV0F7.tmp	78
PID 3420 wrote to memory of 4348	3420	is-DV0F7.tmp	78
PID 4348 wrote to memory of 3980	4348	PrintFolders.exe	79
PID 4348 wrote to memory of 3980	4348	PrintFolders.exe	79
PID 4348 wrote to memory of 3980	4348	PrintFolders.exe	79
PID 4348 wrote to memory of 4392	4348	PrintFolders.exe	82
PID 4348 wrote to memory of 4392	4348	PrintFolders.exe	82
PID 4348 wrote to memory of 4392	4348	PrintFolders.exe	82
PID 4392 wrote to memory of 3860	4392	cmd.exe	84
PID 4392 wrote to memory of 3860	4392	cmd.exe	84
PID 4392 wrote to memory of 3860	4392	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Users\Admin\AppData\Local\Temp\is-9JTK7.tmp\is-DV0F7.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9JTK7.tmp\is-DV0F7.tmp" /SL4 $601D4 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2042488 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3420
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4348
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\oOGRCE.exe
      4⤵
      Executes dropped EXE
      PID:3980
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4392
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3860

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 94bc3c067d0b51eb03c1febaad37a2b431af3b5539d4389c079bb71ece7e87d1
MD5 66a62194a0daec20a904b2ec4a417de7
SHA1 8669ae918c478db16544596aae5bc567d8911680
SHA512 f978a1fde97e9eee3a971c7ad960ce4e0dcc3bd6f6edb353b1da858a810f7a1ccf766f217de172eae9bace8be445490b1fb478411eec3109e029769247b39fff
SSDEEP 49152:amUle+aYHynHF7BWQsmJPyEg+d86rO9YthC25KSO88:ue+hHynHFtWQsmJPyJ+d86rO9i5Kx88
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 94bc3c067d0b51eb03c1febaad37a2b431af3b5539d4389c079bb71ece7e87d1
MD5 66a62194a0daec20a904b2ec4a417de7
SHA1 8669ae918c478db16544596aae5bc567d8911680
SHA512 f978a1fde97e9eee3a971c7ad960ce4e0dcc3bd6f6edb353b1da858a810f7a1ccf766f217de172eae9bace8be445490b1fb478411eec3109e029769247b39fff
SSDEEP 49152:amUle+aYHynHF7BWQsmJPyEg+d86rO9YthC25KSO88:ue+hHynHFtWQsmJPyJ+d86rO9i5Kx88
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-21I2C.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-DV0F7.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9JTK7.tmp\is-DV0F7.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-DV0F7.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9JTK7.tmp\is-DV0F7.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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oOGRCE.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\oOGRCE.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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oOGRCE.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\oOGRCE.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/1048-156-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1048-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1048-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4348-142-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/4348-144-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/4348-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4348-152-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/4348-143-0x0000000000400000-0x0000000001545000-memory.dmp

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memory/4348-155-0x0000000000400000-0x0000000001545000-memory.dmp

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