nymaim | 78c00aabbcf79a09db28e2091d5ed1f01595c0d620f4a2c491bd1c45e1091111

Analysis

max time kernel
90s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
14/12/2022, 04:32

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General

Target
file.exe
Size 2.3MB
Sample221214-e5y94shb79
SHA256 78c00aabbcf79a09db28e2091d5ed1f01595c0d620f4a2c491bd1c45e1091111
MD5 0f64b9c167281f24c2eb76c865804922
SHA1 a4dad32a3e60265c66dedee0a805451f605e4df7
SHA512 b0bfb4f8e78dc6ee72a315b87233750fe3787053b588f8df47d48edc069a53b11cb7537e659f58cf040f5c29cc7c0be9bbc2ee0773b160fe0a857131289c263b
SSDEEP 49152:UNur/D3Zui4yj3EgROHAhhLD3hmX5b41unUNyok76i2YmAnrJeOCgSY/q:UNy/jkNHukyv3hsb41mUQokp2TA1cY/q
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
3800	is-RAJMB.tmp
2440	nyFolders.exe
4808	Y3h83.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	nyFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3800	is-RAJMB.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-RAJMB.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nyFolders.exe	is-RAJMB.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-RAJMB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VLPGE.tmp	is-RAJMB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T10QB.tmp	is-RAJMB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2BMFR.tmp	is-RAJMB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NR1D9.tmp	is-RAJMB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V5KRJ.tmp	is-RAJMB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I39QS.tmp	is-RAJMB.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
3172	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2440	nyFolders.exe
2440	nyFolders.exe
2440	nyFolders.exe
2440	nyFolders.exe
2440	nyFolders.exe
2440	nyFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3172	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2476 wrote to memory of 3800	2476	file.exe	80
PID 2476 wrote to memory of 3800	2476	file.exe	80
PID 2476 wrote to memory of 3800	2476	file.exe	80
PID 3800 wrote to memory of 2440	3800	is-RAJMB.tmp	81
PID 3800 wrote to memory of 2440	3800	is-RAJMB.tmp	81
PID 3800 wrote to memory of 2440	3800	is-RAJMB.tmp	81
PID 2440 wrote to memory of 4808	2440	nyFolders.exe	82
PID 2440 wrote to memory of 4808	2440	nyFolders.exe	82
PID 2440 wrote to memory of 4808	2440	nyFolders.exe	82
PID 2440 wrote to memory of 3644	2440	nyFolders.exe	90
PID 2440 wrote to memory of 3644	2440	nyFolders.exe	90
PID 2440 wrote to memory of 3644	2440	nyFolders.exe	90
PID 3644 wrote to memory of 3172	3644	cmd.exe	92
PID 3644 wrote to memory of 3172	3644	cmd.exe	92
PID 3644 wrote to memory of 3172	3644	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2476
- C:\Users\Admin\AppData\Local\Temp\is-AODLR.tmp\is-RAJMB.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-AODLR.tmp\is-RAJMB.tmp" /SL4 $8005E "C:\Users\Admin\AppData\Local\Temp\file.exe" 2098209 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3800
- - C:\Program Files (x86)\PrintFolders\nyFolders.exe
    "C:\Program Files (x86)\PrintFolders\nyFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2440
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\Y3h83.exe
      4⤵
      Executes dropped EXE
      PID:4808
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nyFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nyFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3644
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nyFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3172

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

nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.4MB
SHA256 52401d69f08a8b4e2f4b0fe2eaf633d3c5aab914b9ed8d98d5515195b4107628
MD5 0097aeb1b55cdd5f055aae5fe2a378e8
SHA1 7b50e6ff96ff73d33ee9d63e786e876923102f32
SHA512 c9d4731f4161bd5c59df484bab2ff3ec5c5af7807780de43bf139e260d7a00f676f2dc91da6ebc42610d524ce064e08fe3eede50a19fba583826e4fdf9d6ab1f
SSDEEP 98304:tQrg+LtNSfhy/8Qe3CKGHAcAp71W/hd9etiGR0:lf+fX1
MD5 SHA1 SHA512 SSDEEP

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nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.4MB
SHA256 52401d69f08a8b4e2f4b0fe2eaf633d3c5aab914b9ed8d98d5515195b4107628
MD5 0097aeb1b55cdd5f055aae5fe2a378e8
SHA1 7b50e6ff96ff73d33ee9d63e786e876923102f32
SHA512 c9d4731f4161bd5c59df484bab2ff3ec5c5af7807780de43bf139e260d7a00f676f2dc91da6ebc42610d524ce064e08fe3eede50a19fba583826e4fdf9d6ab1f
SSDEEP 98304:tQrg+LtNSfhy/8Qe3CKGHAcAp71W/hd9etiGR0:lf+fX1
MD5 SHA1 SHA512 SSDEEP

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is-RAJMB.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-AODLR.tmp\is-RAJMB.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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is-RAJMB.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-AODLR.tmp\is-RAJMB.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-O969L.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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Y3h83.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\Y3h83.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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Y3h83.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\Y3h83.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/2440-143-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/2440-142-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/2440-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2440-151-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/2440-154-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/2476-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/2476-137-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/2476-155-0x0000000000400000-0x0000000000439000-memory.dmp

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