nymaim | ed1d1c08546a03aea04af1f0ae5a67cc1d5f0fe7a3c9fd41345f4335070c458a

Analysis

max time kernel
92s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2022, 22:01

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General

Target
file.exe
Size 3.4MB
Sample221203-1w72jsdb4s
SHA256 ed1d1c08546a03aea04af1f0ae5a67cc1d5f0fe7a3c9fd41345f4335070c458a
MD5 172244c254ce8b089f3b4a6053edbae4
SHA1 1d83031e726d6c904f1fbca28aadb1baf7ea9886
SHA512 7d3b3aa4b13687f2b19e4e231e68985b1f77d5629724b5a4d26845da2cb718d0eaf919d45ccda03dd3b1d799c116a4fee87286d9f5a8a2c3e3de56e43872e2e3
SSDEEP 98304:AEym7QrK5R3rLi33D1iA0J8ENv4r8jHv6KE7zDgfsvgXcyC:4EjrLSTITRDjHvBEh4XcyC
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
1944	is-R0HKC.tmp
1164	PrintFolders.exe
3196	cK2943XyrkieF.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1944	is-R0HKC.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 opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-R0HKC.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-R0HKC.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KDQUC.tmp	is-R0HKC.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GKSPE.tmp	is-R0HKC.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RF8LU.tmp	is-R0HKC.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-R0HKC.tmp
File created	C:\Program Files (x86)\PrintFolders\is-K923J.tmp	is-R0HKC.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G4FKR.tmp	is-R0HKC.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VDBVD.tmp	is-R0HKC.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
4168	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1164	PrintFolders.exe
1164	PrintFolders.exe
1164	PrintFolders.exe
1164	PrintFolders.exe
1164	PrintFolders.exe
1164	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4168	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1400 wrote to memory of 1944	1400	file.exe	80
PID 1400 wrote to memory of 1944	1400	file.exe	80
PID 1400 wrote to memory of 1944	1400	file.exe	80
PID 1944 wrote to memory of 1164	1944	is-R0HKC.tmp	82
PID 1944 wrote to memory of 1164	1944	is-R0HKC.tmp	82
PID 1944 wrote to memory of 1164	1944	is-R0HKC.tmp	82
PID 1164 wrote to memory of 3196	1164	PrintFolders.exe	84
PID 1164 wrote to memory of 3196	1164	PrintFolders.exe	84
PID 1164 wrote to memory of 3196	1164	PrintFolders.exe	84
PID 1164 wrote to memory of 3988	1164	PrintFolders.exe	91
PID 1164 wrote to memory of 3988	1164	PrintFolders.exe	91
PID 1164 wrote to memory of 3988	1164	PrintFolders.exe	91
PID 3988 wrote to memory of 4168	3988	cmd.exe	93
PID 3988 wrote to memory of 4168	3988	cmd.exe	93
PID 3988 wrote to memory of 4168	3988	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:1400
- C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp" /SL4 $1C0022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3379009 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1944
- - 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:1164
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\cK2943XyrkieF.exe
      4⤵
      Executes dropped EXE
      PID:3196
  - - 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:3988
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4168

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 5.7MB
SHA256 f4b2f604c480129e193a78bac3e1e0ae6424724e9805548f0a2bdde400319c06
MD5 f54b5a9b9ff3bcfaa46e6280ef35a273
SHA1 985db004cb4e38b48479cffa3a4a6d375181ae67
SHA512 42a1be7a5e18456f8b52f6e767d8acb897d7bb288c03110181fdab84c7539dce78f07d58ac57149c97d8d74058bedb02ab9908ae146d6651db1b62f81ee51f76
SSDEEP 49152:Ff4LdFjp8ytqDqQ2e+H+OjXpniybkSlssujgQWLXs520NxCgvcWSuM3pbe77l:R4Lrjd75PniyBESAYsxpkWSuM3pbe3l
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 5.7MB
SHA256 f4b2f604c480129e193a78bac3e1e0ae6424724e9805548f0a2bdde400319c06
MD5 f54b5a9b9ff3bcfaa46e6280ef35a273
SHA1 985db004cb4e38b48479cffa3a4a6d375181ae67
SHA512 42a1be7a5e18456f8b52f6e767d8acb897d7bb288c03110181fdab84c7539dce78f07d58ac57149c97d8d74058bedb02ab9908ae146d6651db1b62f81ee51f76
SSDEEP 49152:Ff4LdFjp8ytqDqQ2e+H+OjXpniybkSlssujgQWLXs520NxCgvcWSuM3pbe77l:R4Lrjd75PniyBESAYsxpkWSuM3pbe3l
MD5 SHA1 SHA512 SSDEEP

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is-R0HKC.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-R0HKC.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-PJ53C.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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cK2943XyrkieF.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\cK2943XyrkieF.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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cK2943XyrkieF.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\cK2943XyrkieF.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/1164-143-0x0000000000400000-0x00000000017BD000-memory.dmp

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memory/1164-153-0x0000000000400000-0x00000000017BD000-memory.dmp

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memory/1164-156-0x0000000000400000-0x00000000017BD000-memory.dmp

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memory/1164-144-0x0000000000400000-0x00000000017BD000-memory.dmp

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memory/1164-145-0x0000000000400000-0x00000000017BD000-memory.dmp

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memory/1164-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1400-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1400-134-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1400-139-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1400-157-0x0000000000400000-0x0000000000413000-memory.dmp

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